| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=debugify,loop-idiom -mtriple=x86_64 -mcpu=core-avx2 < %s -S | FileCheck --check-prefixes=ALL,LZCNT %s |
| ; RUN: opt -passes=debugify,loop-idiom -mtriple=x86_64 -mcpu=corei7 < %s -S | FileCheck --check-prefixes=ALL,NOLZCNT %s |
| ; RUN: opt -passes=debugify,loop-idiom -mtriple=x86_64 -mcpu=core-avx2 < %s -S --try-experimental-debuginfo-iterators | FileCheck --check-prefixes=ALL,LZCNT %s |
| |
| declare i32 @gen32() |
| declare void @use32(i32) |
| declare void @use1(i1) |
| declare void @external_side_effect() |
| |
| ; The patterns here are all have the same base form: |
| ; while (!(x & (1U << bit))) |
| ; x <<= 1; |
| ; .. which is an uncountable loop. |
| ; We should transform it into it's countable form. |
| |
| ; Most basic example. |
| define i32 @p0_i32(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @p0_i32( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG16:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META9:![0-9]+]], !DIExpression(), [[DBG16]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG17:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG17]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG18:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG17]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG17]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META11:![0-9]+]], !DIExpression(), [[DBG17]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG19:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META12:![0-9]+]], !DIExpression(), [[DBG19]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG20:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META13:![0-9]+]], !DIExpression(), [[DBG20]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG21:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META15:![0-9]+]], !DIExpression(), [[DBG21]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG22:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG22]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG22]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG17]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG23:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p0_i32( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG16:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META9:![0-9]+]], !DIExpression(), [[DBG16]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG17:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG18:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META11:![0-9]+]], !DIExpression(), [[DBG18]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG19:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META12:![0-9]+]], !DIExpression(), [[DBG19]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG20:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META13:![0-9]+]], !DIExpression(), [[DBG20]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG21:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META15:![0-9]+]], !DIExpression(), [[DBG21]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG22:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG18]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG23:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Same, but in some other bit width. |
| define i16 @p1_i16(i16 %x, i16 %bit) { |
| ; LZCNT-LABEL: @p1_i16( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i16 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i16 1, [[BIT_FR]], !dbg [[DBG32:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i16 [[BITMASK]], [[META26:![0-9]+]], !DIExpression(), [[DBG32]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i16 [[BITMASK]], -1, !dbg [[DBG33:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i16 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i16 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i16 @llvm.ctlz.i16(i16 [[X_MASKED]], i1 true), !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i16 16, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i16 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i16 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i16 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i16 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i16 [[X_CURR]], 1, !dbg [[DBG33]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG34:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG33]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i16 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG33]] |
| ; LZCNT-NEXT: #dbg_value(i16 [[TMP0]], [[META28:![0-9]+]], !DIExpression(), [[DBG33]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i16 [[TMP0]], [[BITMASK]], !dbg [[DBG35:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i16 [[X_CURR_BITMASKED]], [[META29:![0-9]+]], !DIExpression(), [[DBG35]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i16 [[X_CURR_BITMASKED]], 0, !dbg [[DBG36:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META30:![0-9]+]], !DIExpression(), [[DBG36]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i16 [[TMP0]], 1, !dbg [[DBG37:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i16 [[TMP1]], [[META31:![0-9]+]], !DIExpression(), [[DBG37]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i16 [[LOOP_IV]], 1, !dbg [[DBG38:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i16 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG38]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG38]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i16 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG33]] |
| ; LZCNT-NEXT: ret i16 [[X_CURR_LCSSA]], !dbg [[DBG39:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p1_i16( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i16 1, [[BIT:%.*]], !dbg [[DBG32:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i16 [[BITMASK]], [[META26:![0-9]+]], !DIExpression(), [[DBG32]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG33:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i16 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG34:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i16 [[X_CURR]], [[META28:![0-9]+]], !DIExpression(), [[DBG34]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i16 [[X_CURR]], [[BITMASK]], !dbg [[DBG35:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i16 [[X_CURR_BITMASKED]], [[META29:![0-9]+]], !DIExpression(), [[DBG35]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i16 [[X_CURR_BITMASKED]], 0, !dbg [[DBG36:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META30:![0-9]+]], !DIExpression(), [[DBG36]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i16 [[X_CURR]], 1, !dbg [[DBG37:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i16 [[X_NEXT]], [[META31:![0-9]+]], !DIExpression(), [[DBG37]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG38:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i16 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG34]] |
| ; NOLZCNT-NEXT: ret i16 [[X_CURR_LCSSA]], !dbg [[DBG39:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i16 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i16 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i16 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i16 %x.curr.bitmasked, 0 |
| %x.next = shl i16 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i16 %x.curr |
| } |
| |
| ; We don't particularly care whether %x.curr or %x.curr will live-out. |
| define i32 @p2_different_liveout(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @p2_different_liveout( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG47:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META42:![0-9]+]], !DIExpression(), [[DBG47]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG48:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG48]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG49:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG48]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG48]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META43:![0-9]+]], !DIExpression(), [[DBG48]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG50:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META44:![0-9]+]], !DIExpression(), [[DBG50]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG51:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META45:![0-9]+]], !DIExpression(), [[DBG51]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG52:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META46:![0-9]+]], !DIExpression(), [[DBG52]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG53:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG53]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG53]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG52]] |
| ; LZCNT-NEXT: ret i32 [[X_NEXT_LCSSA]], !dbg [[DBG54:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p2_different_liveout( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG47:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META42:![0-9]+]], !DIExpression(), [[DBG47]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG48:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG49:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META43:![0-9]+]], !DIExpression(), [[DBG49]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG50:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META44:![0-9]+]], !DIExpression(), [[DBG50]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG51:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META45:![0-9]+]], !DIExpression(), [[DBG51]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG52:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META46:![0-9]+]], !DIExpression(), [[DBG52]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG53:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG52]] |
| ; NOLZCNT-NEXT: ret i32 [[X_NEXT_LCSSA]], !dbg [[DBG54:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.next ; not %x.curr |
| } |
| |
| ; Even both of them can liveout |
| define void @p3_constant_mask_24thbit(i32 %x, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p3_constant_mask_24thbit( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], 33554431, !dbg [[DBG61:![0-9]+]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 24, [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X]], [[LOOP_TRIPCOUNT]], !dbg [[DBG61]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG62:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG61]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META57:![0-9]+]], !DIExpression(), [[DBG61]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], 16777216, !dbg [[DBG63:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META58:![0-9]+]], !DIExpression(), [[DBG63]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG64:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META59:![0-9]+]], !DIExpression(), [[DBG64]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG65:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META60:![0-9]+]], !DIExpression(), [[DBG65]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG66:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG66]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG66]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG61]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG65]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG67:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG68:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG69:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p3_constant_mask_24thbit( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG61:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG62:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META57:![0-9]+]], !DIExpression(), [[DBG62]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], 16777216, !dbg [[DBG63:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META58:![0-9]+]], !DIExpression(), [[DBG63]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG64:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META59:![0-9]+]], !DIExpression(), [[DBG64]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG65:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META60:![0-9]+]], !DIExpression(), [[DBG65]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG66:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG62]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG65]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG67:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG68:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG69:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, 16777216 |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| |
| define void @p4_constant_mask_15thbit(i32 %x, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p4_constant_mask_15thbit( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], 65535, !dbg [[DBG76:![0-9]+]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 15, [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X]], [[LOOP_TRIPCOUNT]], !dbg [[DBG76]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG77:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG76]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META72:![0-9]+]], !DIExpression(), [[DBG76]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], 32768, !dbg [[DBG78:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META73:![0-9]+]], !DIExpression(), [[DBG78]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG79:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META74:![0-9]+]], !DIExpression(), [[DBG79]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG80:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META75:![0-9]+]], !DIExpression(), [[DBG80]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG81:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG81]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG81]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG76]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG80]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG82:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG83:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG84:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p4_constant_mask_15thbit( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG76:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG77:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META72:![0-9]+]], !DIExpression(), [[DBG77]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], 32768, !dbg [[DBG78:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META73:![0-9]+]], !DIExpression(), [[DBG78]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG79:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META74:![0-9]+]], !DIExpression(), [[DBG79]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG80:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META75:![0-9]+]], !DIExpression(), [[DBG80]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG81:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG77]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG80]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG82:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG83:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG84:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, 32768 |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| |
| ; All no-wrap flags can be kept on the shift. |
| define void @p5_nuw(i32 %x, i32 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p5_nuw( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG92:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META87:![0-9]+]], !DIExpression(), [[DBG92]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG93:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl nuw i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl nuw i32 [[X]], [[LOOP_TRIPCOUNT]], !dbg [[DBG93]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG94:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG93]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META88:![0-9]+]], !DIExpression(), [[DBG93]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG95:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META89:![0-9]+]], !DIExpression(), [[DBG95]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG96:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META90:![0-9]+]], !DIExpression(), [[DBG96]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl nuw i32 [[TMP0]], 1, !dbg [[DBG97:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META91:![0-9]+]], !DIExpression(), [[DBG97]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG98:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG98]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG98]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG93]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG97]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG99:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG100:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG101:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p5_nuw( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG92:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META87:![0-9]+]], !DIExpression(), [[DBG92]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG93:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG94:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META88:![0-9]+]], !DIExpression(), [[DBG94]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG95:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META89:![0-9]+]], !DIExpression(), [[DBG95]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG96:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META90:![0-9]+]], !DIExpression(), [[DBG96]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl nuw i32 [[X_CURR]], 1, !dbg [[DBG97:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META91:![0-9]+]], !DIExpression(), [[DBG97]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG98:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG94]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG97]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG99:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG100:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG101:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl nuw i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| define void @p6_nsw(i32 %x, i32 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p6_nsw( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG109:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META104:![0-9]+]], !DIExpression(), [[DBG109]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG110:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl nsw i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl nsw i32 [[X]], [[LOOP_TRIPCOUNT]], !dbg [[DBG110]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG111:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG110]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META105:![0-9]+]], !DIExpression(), [[DBG110]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG112:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META106:![0-9]+]], !DIExpression(), [[DBG112]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG113:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META107:![0-9]+]], !DIExpression(), [[DBG113]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl nsw i32 [[TMP0]], 1, !dbg [[DBG114:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META108:![0-9]+]], !DIExpression(), [[DBG114]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG115:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG115]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG115]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG110]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG114]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG116:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG117:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG118:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p6_nsw( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG109:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META104:![0-9]+]], !DIExpression(), [[DBG109]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG110:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG111:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META105:![0-9]+]], !DIExpression(), [[DBG111]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG112:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META106:![0-9]+]], !DIExpression(), [[DBG112]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG113:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META107:![0-9]+]], !DIExpression(), [[DBG113]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl nsw i32 [[X_CURR]], 1, !dbg [[DBG114:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META108:![0-9]+]], !DIExpression(), [[DBG114]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG115:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG111]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG114]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG116:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG117:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG118:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl nsw i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| define void @p7_nuwnsw(i32 %x, i32 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p7_nuwnsw( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG126:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META121:![0-9]+]], !DIExpression(), [[DBG126]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG127:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl nuw nsw i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl nuw nsw i32 [[X]], [[LOOP_TRIPCOUNT]], !dbg [[DBG127]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG128:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG127]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META122:![0-9]+]], !DIExpression(), [[DBG127]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG129:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META123:![0-9]+]], !DIExpression(), [[DBG129]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG130:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META124:![0-9]+]], !DIExpression(), [[DBG130]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl nuw nsw i32 [[TMP0]], 1, !dbg [[DBG131:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META125:![0-9]+]], !DIExpression(), [[DBG131]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG132:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG132]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG132]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG127]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG131]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG133:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG134:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG135:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p7_nuwnsw( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG126:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META121:![0-9]+]], !DIExpression(), [[DBG126]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG127:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG128:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META122:![0-9]+]], !DIExpression(), [[DBG128]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG129:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META123:![0-9]+]], !DIExpression(), [[DBG129]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG130:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META124:![0-9]+]], !DIExpression(), [[DBG130]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl nuw nsw i32 [[X_CURR]], 1, !dbg [[DBG131:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META125:![0-9]+]], !DIExpression(), [[DBG131]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG132:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG128]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG131]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG133:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG134:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG135:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl nuw nsw i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| |
| define void @p8_constant_mask_signbit_noncanonical(i32 %x, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p8_constant_mask_signbit_noncanonical( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], -1, !dbg [[DBG142:![0-9]+]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 31, [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG142]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG143:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG142]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META138:![0-9]+]], !DIExpression(), [[DBG142]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], -2147483648, !dbg [[DBG144:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META139:![0-9]+]], !DIExpression(), [[DBG144]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG145:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META140:![0-9]+]], !DIExpression(), [[DBG145]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG146:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META141:![0-9]+]], !DIExpression(), [[DBG146]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG147:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG147]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG147]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG142]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG146]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG148:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG149:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG150:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p8_constant_mask_signbit_noncanonical( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG142:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG143:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META138:![0-9]+]], !DIExpression(), [[DBG143]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], -2147483648, !dbg [[DBG144:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META139:![0-9]+]], !DIExpression(), [[DBG144]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG145:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META140:![0-9]+]], !DIExpression(), [[DBG145]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG146:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META141:![0-9]+]], !DIExpression(), [[DBG146]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG147:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG143]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG146]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG148:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG149:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG150:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, 2147483648 |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| |
| define void @p9_constant_mask_signbit_canonical(i32 %x, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p9_constant_mask_signbit_canonical( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], -1, !dbg [[DBG156:![0-9]+]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 31, [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG156]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG157:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG156]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META153:![0-9]+]], !DIExpression(), [[DBG156]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp sgt i32 [[TMP0]], -1, !dbg [[DBG158:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META154:![0-9]+]], !DIExpression(), [[DBG158]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG159:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META155:![0-9]+]], !DIExpression(), [[DBG159]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG160:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG160]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG160]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG156]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG159]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG161:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG162:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG163:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p9_constant_mask_signbit_canonical( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG156:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG157:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META153:![0-9]+]], !DIExpression(), [[DBG157]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp sgt i32 [[X_CURR]], -1, !dbg [[DBG158:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META154:![0-9]+]], !DIExpression(), [[DBG158]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG159:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META155:![0-9]+]], !DIExpression(), [[DBG159]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG160:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG157]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG159]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG161:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG162:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG163:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.isbitunset = icmp sgt i32 %x.curr, -1 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| |
| define void @p10_x_is_not_one(i32 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @p10_x_is_not_one( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG171:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META166:![0-9]+]], !DIExpression(), [[DBG171]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG172:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[DOTMASKED:%.*]] = and i32 2, [[BIT_FR_MASK]], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[DOTMASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[DOTMASKED]], i1 true), !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[DOTMASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[DOTMASKED_NUMLEADINGZEROS]], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[DOTMASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[DOTMASKED_NUMACTIVEBITS]], -1, !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[DOTMASKED_LEADINGONEPOS]], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 2, [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG172]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG173:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ 2, [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG172]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META167:![0-9]+]], !DIExpression(), [[DBG172]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG174:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META168:![0-9]+]], !DIExpression(), [[DBG174]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG175:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META169:![0-9]+]], !DIExpression(), [[DBG175]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG176:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META170:![0-9]+]], !DIExpression(), [[DBG176]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG177:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG177]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG177]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG172]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG176]] |
| ; LZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG178:![0-9]+]] |
| ; LZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG179:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG180:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p10_x_is_not_one( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG171:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META166:![0-9]+]], !DIExpression(), [[DBG171]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG172:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ 2, [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG173:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META167:![0-9]+]], !DIExpression(), [[DBG173]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG174:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META168:![0-9]+]], !DIExpression(), [[DBG174]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG175:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META169:![0-9]+]], !DIExpression(), [[DBG175]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG176:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META170:![0-9]+]], !DIExpression(), [[DBG176]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG177:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG173]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i32 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG176]] |
| ; NOLZCNT-NEXT: store i32 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 4, !dbg [[DBG178:![0-9]+]] |
| ; NOLZCNT-NEXT: store i32 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 4, !dbg [[DBG179:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG180:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ 2, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i32 %x.curr, ptr %p0 |
| store i32 %x.next, ptr %p1 |
| ret void |
| } |
| |
| ; Check that loop backedge's cmp-br order is correctly handled |
| define i32 @p11(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @p11( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG188:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META183:![0-9]+]], !DIExpression(), [[DBG188]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG189:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG189]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG190:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG189]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG189]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META184:![0-9]+]], !DIExpression(), [[DBG189]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG191:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META185:![0-9]+]], !DIExpression(), [[DBG191]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp ne i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG192:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META186:![0-9]+]], !DIExpression(), [[DBG192]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG193:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META187:![0-9]+]], !DIExpression(), [[DBG193]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG194:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG194]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG194]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG189]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG195:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p11( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG188:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META183:![0-9]+]], !DIExpression(), [[DBG188]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG189:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG190:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META184:![0-9]+]], !DIExpression(), [[DBG190]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG191:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META185:![0-9]+]], !DIExpression(), [[DBG191]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp ne i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG192:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META186:![0-9]+]], !DIExpression(), [[DBG192]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG193:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META187:![0-9]+]], !DIExpression(), [[DBG193]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG194:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG190]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG195:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp ne i32 %x.curr.bitmasked, 0 ; swapped predicate |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %end, label %loop ; swapped dests |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; `and` is commutative, so ensure that order is irrelevant |
| define i32 @p12(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @p12( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG203:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META198:![0-9]+]], !DIExpression(), [[DBG203]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG204:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG204]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG205:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG204]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG204]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META199:![0-9]+]], !DIExpression(), [[DBG204]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[BITMASK]], [[TMP0]], !dbg [[DBG206:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META200:![0-9]+]], !DIExpression(), [[DBG206]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG207:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META201:![0-9]+]], !DIExpression(), [[DBG207]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG208:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META202:![0-9]+]], !DIExpression(), [[DBG208]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG209:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG209]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG209]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG204]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG210:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p12( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG203:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META198:![0-9]+]], !DIExpression(), [[DBG203]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG204:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG205:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META199:![0-9]+]], !DIExpression(), [[DBG205]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[BITMASK]], [[X_CURR]], !dbg [[DBG206:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META200:![0-9]+]], !DIExpression(), [[DBG206]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG207:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META201:![0-9]+]], !DIExpression(), [[DBG207]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG208:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META202:![0-9]+]], !DIExpression(), [[DBG208]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG209:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG205]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG210:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %bitmask, %x.curr ; swapped |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; PHI node does not have any particular order for it's incomings, |
| ; but check that the other order still works. |
| define i32 @p13(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @p13( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG218:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META213:![0-9]+]], !DIExpression(), [[DBG218]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG219:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG219]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG220:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG219]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[TMP1:%.*]], [[LOOP]] ], [ [[X]], [[ENTRY]] ], !dbg [[DBG219]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META214:![0-9]+]], !DIExpression(), [[DBG219]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG221:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META215:![0-9]+]], !DIExpression(), [[DBG221]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG222:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META216:![0-9]+]], !DIExpression(), [[DBG222]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG223:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META217:![0-9]+]], !DIExpression(), [[DBG223]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG224:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG224]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG224]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG219]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG225:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p13( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG218:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META213:![0-9]+]], !DIExpression(), [[DBG218]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG219:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X_NEXT:%.*]], [[LOOP]] ], [ [[X:%.*]], [[ENTRY:%.*]] ], !dbg [[DBG220:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META214:![0-9]+]], !DIExpression(), [[DBG220]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG221:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META215:![0-9]+]], !DIExpression(), [[DBG221]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG222:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META216:![0-9]+]], !DIExpression(), [[DBG222]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG223:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META217:![0-9]+]], !DIExpression(), [[DBG223]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG224:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG220]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG225:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x.next, %loop ], [ %x, %entry ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; ICmp-Br are commutative |
| define i32 @p14(i32 %x) { |
| ; LZCNT-LABEL: @p14( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], -1, !dbg [[DBG231:![0-9]+]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 31, [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG231]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG232:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG231]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG231]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META228:![0-9]+]], !DIExpression(), [[DBG231]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp slt i32 [[TMP0]], 0, !dbg [[DBG233:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META229:![0-9]+]], !DIExpression(), [[DBG233]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG234:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META230:![0-9]+]], !DIExpression(), [[DBG234]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG235:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG235]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG235]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG231]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG236:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @p14( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG231:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG232:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META228:![0-9]+]], !DIExpression(), [[DBG232]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp slt i32 [[X_CURR]], 0, !dbg [[DBG233:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META229:![0-9]+]], !DIExpression(), [[DBG233]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG234:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META230:![0-9]+]], !DIExpression(), [[DBG234]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG235:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG232]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG236:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.isbitunset = icmp slt i32 %x.curr, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %end, label %loop |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ;------------------------------------------------------------------------------- |
| ; Negative tests |
| |
| ; The %bitmask must be outside of the loop. |
| define i32 @n15(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n15( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG244:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG245:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META239:![0-9]+]], !DIExpression(), [[DBG245]]) |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG246:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META240:![0-9]+]], !DIExpression(), [[DBG246]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG247:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META241:![0-9]+]], !DIExpression(), [[DBG247]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG248:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META242:![0-9]+]], !DIExpression(), [[DBG248]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG249:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META243:![0-9]+]], !DIExpression(), [[DBG249]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG250:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG245]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG251:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %bitmask = shl i32 1, %bit ; not loop-invariant |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; The %bitmask must be loop-invariant |
| define i32 @n16(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n16( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG259:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG260:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META254:![0-9]+]], !DIExpression(), [[DBG260]]) |
| ; ALL-NEXT: [[BITMASK:%.*]] = call i32 @gen32(), !dbg [[DBG261:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META255:![0-9]+]], !DIExpression(), [[DBG261]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG262:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META256:![0-9]+]], !DIExpression(), [[DBG262]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG263:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META257:![0-9]+]], !DIExpression(), [[DBG263]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG264:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META258:![0-9]+]], !DIExpression(), [[DBG264]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG265:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG260]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG266:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %bitmask = call i32 @gen32() ; really not loop-invariant |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; The %bitmask must be a left-shift of a single bit. |
| define i32 @n17(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n17( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 2, [[BIT:%.*]], !dbg [[DBG274:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META269:![0-9]+]], !DIExpression(), [[DBG274]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG275:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG276:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META270:![0-9]+]], !DIExpression(), [[DBG276]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG277:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META271:![0-9]+]], !DIExpression(), [[DBG277]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG278:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META272:![0-9]+]], !DIExpression(), [[DBG278]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG279:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META273:![0-9]+]], !DIExpression(), [[DBG279]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG280:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG276]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG281:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 2, %bit ; not what we are looking for. |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Bad recurrence - should be a left-shift by 1. |
| define i32 @n18(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n18( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG289:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META284:![0-9]+]], !DIExpression(), [[DBG289]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG290:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG291:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META285:![0-9]+]], !DIExpression(), [[DBG291]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG292:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META286:![0-9]+]], !DIExpression(), [[DBG292]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG293:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META287:![0-9]+]], !DIExpression(), [[DBG293]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 2, !dbg [[DBG294:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META288:![0-9]+]], !DIExpression(), [[DBG294]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG295:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG291]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG296:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 2 ; wrong shift amount. |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; The comparison is not what we are looking for. |
| define i32 @n19(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n19( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG304:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META299:![0-9]+]], !DIExpression(), [[DBG304]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG305:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG306:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META300:![0-9]+]], !DIExpression(), [[DBG306]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG307:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META301:![0-9]+]], !DIExpression(), [[DBG307]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp ne i32 [[X_CURR_BITMASKED]], [[BITMASK]], !dbg [[DBG308:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META302:![0-9]+]], !DIExpression(), [[DBG308]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG309:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META303:![0-9]+]], !DIExpression(), [[DBG309]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG310:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG306]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG311:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp ne i32 %x.curr.bitmasked, %bitmask ; should be `==0` |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; We should loop while %x.curr.bitmasked is 0, not exit when it is 0. |
| define i32 @n20(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n20( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG319:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META314:![0-9]+]], !DIExpression(), [[DBG319]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG320:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG321:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META315:![0-9]+]], !DIExpression(), [[DBG321]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG322:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META316:![0-9]+]], !DIExpression(), [[DBG322]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG323:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META317:![0-9]+]], !DIExpression(), [[DBG323]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG324:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META318:![0-9]+]], !DIExpression(), [[DBG324]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG325:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG321]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG326:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %end, label %loop ; wrong order of successors |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; We should loop while %x.curr.bitmasked is 0, not while it is not 0. |
| define i32 @n21(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n21( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG334:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META329:![0-9]+]], !DIExpression(), [[DBG334]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG335:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG336:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META330:![0-9]+]], !DIExpression(), [[DBG336]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG337:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META331:![0-9]+]], !DIExpression(), [[DBG337]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp ne i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG338:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META332:![0-9]+]], !DIExpression(), [[DBG338]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG339:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META333:![0-9]+]], !DIExpression(), [[DBG339]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG340:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG336]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG341:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp ne i32 %x.curr.bitmasked, 0 ; wrong predicate |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; PHI node is not a recurrence |
| define i32 @n22(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n22( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG349:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META344:![0-9]+]], !DIExpression(), [[DBG349]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG350:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: #dbg_value(i32 [[X:%.*]], [[META345:![0-9]+]], !DIExpression(), [[META351:![0-9]+]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X]], [[BITMASK]], !dbg [[DBG352:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META346:![0-9]+]], !DIExpression(), [[DBG352]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG353:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META347:![0-9]+]], !DIExpression(), [[DBG353]]) |
| ; ALL-NEXT: [[X_NEXT:%.*]] = shl i32 [[X]], 1, !dbg [[DBG354:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META348:![0-9]+]], !DIExpression(), [[DBG354]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG355:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: ret i32 [[X]], !dbg [[DBG356:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x, %loop ] ; should use %x.next when coming from %loop |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Masking wrong value |
| define i32 @n23(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n23( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG364:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META359:![0-9]+]], !DIExpression(), [[DBG364]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG365:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG366:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META360:![0-9]+]], !DIExpression(), [[DBG366]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X]], [[BITMASK]], !dbg [[DBG367:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META361:![0-9]+]], !DIExpression(), [[DBG367]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG368:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META362:![0-9]+]], !DIExpression(), [[DBG368]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG369:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META363:![0-9]+]], !DIExpression(), [[DBG369]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG370:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG366]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG371:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x, %bitmask ; should use %x.curr, not %x |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Checking wrong value |
| define i32 @n24(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n24( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG379:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META374:![0-9]+]], !DIExpression(), [[DBG379]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG380:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG381:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META375:![0-9]+]], !DIExpression(), [[DBG381]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG382:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META376:![0-9]+]], !DIExpression(), [[DBG382]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR]], 0, !dbg [[DBG383:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META377:![0-9]+]], !DIExpression(), [[DBG383]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG384:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META378:![0-9]+]], !DIExpression(), [[DBG384]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG385:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG381]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG386:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr, 0 ; should be checking %x.curr.bitmasked |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Shifting wrong value |
| define i32 @n25(i32 %x, i32 %bit) { |
| ; ALL-LABEL: @n25( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG394:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META389:![0-9]+]], !DIExpression(), [[DBG394]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG395:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG396:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META390:![0-9]+]], !DIExpression(), [[DBG396]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG397:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META391:![0-9]+]], !DIExpression(), [[DBG397]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG398:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META392:![0-9]+]], !DIExpression(), [[DBG398]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X]], 1, !dbg [[DBG399:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META393:![0-9]+]], !DIExpression(), [[DBG399]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG400:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG396]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG401:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x, 1 ; should be shifting %x.curr |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Bit mask is not a power of 2 |
| define i32 @n26(i32 %x) { |
| ; ALL-LABEL: @n26( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG408:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG409:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META404:![0-9]+]], !DIExpression(), [[DBG409]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], 16777215, !dbg [[DBG410:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META405:![0-9]+]], !DIExpression(), [[DBG410]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG411:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META406:![0-9]+]], !DIExpression(), [[DBG411]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG412:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META407:![0-9]+]], !DIExpression(), [[DBG412]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG413:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG409]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG414:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, 16777215 ; not a power of 2 |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Bit mask is not a power of 2 |
| define i32 @n27(i32 %x) { |
| ; ALL-LABEL: @n27( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG421:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG422:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META417:![0-9]+]], !DIExpression(), [[DBG422]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], 384, !dbg [[DBG423:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META418:![0-9]+]], !DIExpression(), [[DBG423]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG424:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META419:![0-9]+]], !DIExpression(), [[DBG424]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG425:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META420:![0-9]+]], !DIExpression(), [[DBG425]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG426:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG422]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG427:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, 384 ; not a power of 2 |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Bit mask is not a power of 2 |
| define i32 @n28(i32 %x) { |
| ; ALL-LABEL: @n28( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG434:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG435:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META430:![0-9]+]], !DIExpression(), [[DBG435]]) |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], 32896, !dbg [[DBG436:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META431:![0-9]+]], !DIExpression(), [[DBG436]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG437:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META432:![0-9]+]], !DIExpression(), [[DBG437]]) |
| ; ALL-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG438:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META433:![0-9]+]], !DIExpression(), [[DBG438]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG439:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG435]] |
| ; ALL-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG440:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, 32896 ; not a power of 2 |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ;------------------------------------------------------------------------------- |
| ; Tests with extra cruft. |
| |
| ; If loop body has any extra instructions we don't want to deal with it. |
| define i32 @n29(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @n29( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG448:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META443:![0-9]+]], !DIExpression(), [[DBG448]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG449:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG449]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG450:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG449]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG449]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META444:![0-9]+]], !DIExpression(), [[DBG449]]) |
| ; LZCNT-NEXT: call void @external_side_effect(), !dbg [[DBG451:![0-9]+]] |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG452:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META445:![0-9]+]], !DIExpression(), [[DBG452]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG453:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META446:![0-9]+]], !DIExpression(), [[DBG453]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG454:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META447:![0-9]+]], !DIExpression(), [[DBG454]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG455:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG455]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG455]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG449]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG456:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @n29( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG448:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META443:![0-9]+]], !DIExpression(), [[DBG448]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG449:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG450:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META444:![0-9]+]], !DIExpression(), [[DBG450]]) |
| ; NOLZCNT-NEXT: call void @external_side_effect(), !dbg [[DBG451:![0-9]+]] |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG452:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META445:![0-9]+]], !DIExpression(), [[DBG452]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG453:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META446:![0-9]+]], !DIExpression(), [[DBG453]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG454:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META447:![0-9]+]], !DIExpression(), [[DBG454]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG455:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG450]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG456:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| call void @external_side_effect() ; not part of idiom. |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| define i32 @n30(i32 %x) { |
| ; LZCNT-LABEL: @n30( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], -1, !dbg [[DBG462:![0-9]+]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 31, [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG462]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG463:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG462]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG462]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META459:![0-9]+]], !DIExpression(), [[DBG462]]) |
| ; LZCNT-NEXT: call void @external_side_effect(), !dbg [[DBG464:![0-9]+]] |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp sgt i32 [[TMP0]], -1, !dbg [[DBG465:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META460:![0-9]+]], !DIExpression(), [[DBG465]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG466:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META461:![0-9]+]], !DIExpression(), [[DBG466]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG467:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG467]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG467]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG462]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG468:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @n30( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG462:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG463:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META459:![0-9]+]], !DIExpression(), [[DBG463]]) |
| ; NOLZCNT-NEXT: call void @external_side_effect(), !dbg [[DBG464:![0-9]+]] |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp sgt i32 [[X_CURR]], -1, !dbg [[DBG465:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META460:![0-9]+]], !DIExpression(), [[DBG465]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG466:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META461:![0-9]+]], !DIExpression(), [[DBG466]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG467:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG463]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG468:![0-9]+]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| call void @external_side_effect() ; not part of idiom. |
| %x.curr.isbitunset = icmp sgt i32 %x.curr, -1 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; In-loop instructions should not have uses outside of the loop. |
| define i32 @n31(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @n31( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG476:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META471:![0-9]+]], !DIExpression(), [[DBG476]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG477:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG477]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG478:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG477]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META472:![0-9]+]], !DIExpression(), [[DBG477]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG479:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META473:![0-9]+]], !DIExpression(), [[DBG479]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG480:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META474:![0-9]+]], !DIExpression(), [[DBG480]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG481:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META475:![0-9]+]], !DIExpression(), [[DBG481]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG482:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG482]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG482]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG477]] |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED_LCSSA:%.*]] = phi i32 [ [[X_CURR_BITMASKED]], [[LOOP]] ], !dbg [[DBG479]] |
| ; LZCNT-NEXT: call void @use32(i32 [[X_CURR_BITMASKED_LCSSA]]), !dbg [[DBG483:![0-9]+]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG484:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @n31( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG476:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META471:![0-9]+]], !DIExpression(), [[DBG476]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG477:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG478:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META472:![0-9]+]], !DIExpression(), [[DBG478]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG479:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META473:![0-9]+]], !DIExpression(), [[DBG479]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG480:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META474:![0-9]+]], !DIExpression(), [[DBG480]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG481:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META475:![0-9]+]], !DIExpression(), [[DBG481]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG482:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG478]] |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED_LCSSA:%.*]] = phi i32 [ [[X_CURR_BITMASKED]], [[LOOP]] ], !dbg [[DBG479]] |
| ; NOLZCNT-NEXT: call void @use32(i32 [[X_CURR_BITMASKED_LCSSA]]), !dbg [[DBG483:![0-9]+]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG484:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| call void @use32(i32 %x.curr.bitmasked) |
| ret i32 %x.curr |
| } |
| define i32 @n32(i32 %x, i32 %bit) { |
| ; LZCNT-LABEL: @n32( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i32 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT_FR]], !dbg [[DBG492:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META487:![0-9]+]], !DIExpression(), [[DBG492]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i32 [[BITMASK]], -1, !dbg [[DBG493:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i32 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i32 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i32 @llvm.ctlz.i32(i32 [[X_MASKED]], i1 true), !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i32 32, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i32 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i32 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i32 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i32 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG493]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG494:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG493]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP0]], [[META488:![0-9]+]], !DIExpression(), [[DBG493]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[TMP0]], [[BITMASK]], !dbg [[DBG495:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META489:![0-9]+]], !DIExpression(), [[DBG495]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG496:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META490:![0-9]+]], !DIExpression(), [[DBG496]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i32 [[TMP0]], 1, !dbg [[DBG497:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i32 [[TMP1]], [[META491:![0-9]+]], !DIExpression(), [[DBG497]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i32 [[LOOP_IV]], 1, !dbg [[DBG498:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i32 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG498]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG498]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG493]] |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET_LCSSA:%.*]] = phi i1 [ [[X_CURR_ISBITUNSET]], [[LOOP]] ], !dbg [[DBG496]] |
| ; LZCNT-NEXT: call void @use1(i1 [[X_CURR_ISBITUNSET_LCSSA]]), !dbg [[DBG499:![0-9]+]] |
| ; LZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG500:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @n32( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG492:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[BITMASK]], [[META487:![0-9]+]], !DIExpression(), [[DBG492]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG493:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG494:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR]], [[META488:![0-9]+]], !DIExpression(), [[DBG494]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG495:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META489:![0-9]+]], !DIExpression(), [[DBG495]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG496:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META490:![0-9]+]], !DIExpression(), [[DBG496]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i32 [[X_CURR]], 1, !dbg [[DBG497:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i32 [[X_NEXT]], [[META491:![0-9]+]], !DIExpression(), [[DBG497]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG498:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i32 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG494]] |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET_LCSSA:%.*]] = phi i1 [ [[X_CURR_ISBITUNSET]], [[LOOP]] ], !dbg [[DBG496]] |
| ; NOLZCNT-NEXT: call void @use1(i1 [[X_CURR_ISBITUNSET_LCSSA]]), !dbg [[DBG499:![0-9]+]] |
| ; NOLZCNT-NEXT: ret i32 [[X_CURR_LCSSA]], !dbg [[DBG500:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i32 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| call void @use1(i1 %x.curr.isbitunset) |
| ret i32 %x.curr |
| } |
| |
| ; %x.curr is not a PHI node |
| define i32 @n33(i32 %x, i32 %bit, i32 %x.curr) { |
| ; ALL-LABEL: @n33( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG507:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META503:![0-9]+]], !DIExpression(), [[DBG507]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG508:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR:%.*]], [[BITMASK]], !dbg [[DBG509:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META504:![0-9]+]], !DIExpression(), [[DBG509]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG510:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META505:![0-9]+]], !DIExpression(), [[DBG510]]) |
| ; ALL-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG511:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META506:![0-9]+]], !DIExpression(), [[DBG511]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG512:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: ret i32 [[X_CURR]], !dbg [[DBG513:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; %x.curr is a PHI node in a wrong block |
| define i32 @n34(i32 %bit, i1 %c, i32 %x0, i32 %x1) { |
| ; ALL-LABEL: @n34( |
| ; ALL-NEXT: entry: |
| ; ALL-NEXT: [[BITMASK:%.*]] = shl i32 1, [[BIT:%.*]], !dbg [[DBG521:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[BITMASK]], [[META516:![0-9]+]], !DIExpression(), [[DBG521]]) |
| ; ALL-NEXT: br i1 [[C:%.*]], label [[BB0:%.*]], label [[BB1:%.*]], !dbg [[DBG522:![0-9]+]] |
| ; ALL: bb0: |
| ; ALL-NEXT: br label [[MERGE:%.*]], !dbg [[DBG523:![0-9]+]] |
| ; ALL: bb1: |
| ; ALL-NEXT: br label [[MERGE]], !dbg [[DBG524:![0-9]+]] |
| ; ALL: merge: |
| ; ALL-NEXT: [[X_CURR:%.*]] = phi i32 [ [[X0:%.*]], [[BB0]] ], [ [[X1:%.*]], [[BB1]] ], !dbg [[DBG525:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR]], [[META517:![0-9]+]], !DIExpression(), [[DBG525]]) |
| ; ALL-NEXT: br label [[LOOP:%.*]], !dbg [[DBG526:![0-9]+]] |
| ; ALL: loop: |
| ; ALL-NEXT: [[X_CURR_BITMASKED:%.*]] = and i32 [[X_CURR]], [[BITMASK]], !dbg [[DBG527:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_CURR_BITMASKED]], [[META518:![0-9]+]], !DIExpression(), [[DBG527]]) |
| ; ALL-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i32 [[X_CURR_BITMASKED]], 0, !dbg [[DBG528:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META519:![0-9]+]], !DIExpression(), [[DBG528]]) |
| ; ALL-NEXT: [[X_NEXT:%.*]] = shl i32 [[X_CURR]], 1, !dbg [[DBG529:![0-9]+]] |
| ; ALL-NEXT: #dbg_value(i32 [[X_NEXT]], [[META520:![0-9]+]], !DIExpression(), [[DBG529]]) |
| ; ALL-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG530:![0-9]+]] |
| ; ALL: end: |
| ; ALL-NEXT: ret i32 [[X_CURR]], !dbg [[DBG531:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i32 1, %bit |
| br i1 %c, label %bb0, label %bb1 |
| |
| bb0: |
| br label %merge |
| bb1: |
| br label %merge |
| |
| merge: |
| %x.curr = phi i32 [ %x0, %bb0 ], [ %x1, %bb1 ] |
| br label %loop |
| |
| loop: |
| %x.curr.bitmasked = and i32 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i32 %x.curr.bitmasked, 0 |
| %x.next = shl i32 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| ret i32 %x.curr |
| } |
| |
| ; Various weird bit widths |
| define void @t35_i1(i1 %x, i1 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @t35_i1( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i1 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i1 true, [[BIT_FR]], !dbg [[DBG539:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[BITMASK]], [[META534:![0-9]+]], !DIExpression(), [[DBG539]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i1 [[BITMASK]], true, !dbg [[DBG540:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i1 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i1 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i1 @llvm.ctlz.i1(i1 [[X_MASKED]], i1 true), !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i1 true, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add i1 [[X_MASKED_NUMACTIVEBITS]], true, !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i1 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i1 [[LOOP_BACKEDGETAKENCOUNT]], true, !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i1 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i1 [[X_CURR]], true, !dbg [[DBG540]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG541:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i1 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG540]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[TMP0]], [[META535:![0-9]+]], !DIExpression(), [[DBG540]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i1 [[TMP0]], [[BITMASK]], !dbg [[DBG542:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_BITMASKED]], [[META536:![0-9]+]], !DIExpression(), [[DBG542]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i1 [[X_CURR_BITMASKED]], false, !dbg [[DBG543:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META537:![0-9]+]], !DIExpression(), [[DBG543]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i1 [[TMP0]], true, !dbg [[DBG544:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[TMP1]], [[META538:![0-9]+]], !DIExpression(), [[DBG544]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i1 [[LOOP_IV]], true, !dbg [[DBG545:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i1 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG545]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG545]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i1 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG540]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i1 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG544]] |
| ; LZCNT-NEXT: store i1 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 1, !dbg [[DBG546:![0-9]+]] |
| ; LZCNT-NEXT: store i1 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 1, !dbg [[DBG547:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG548:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @t35_i1( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i1 true, [[BIT:%.*]], !dbg [[DBG539:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[BITMASK]], [[META534:![0-9]+]], !DIExpression(), [[DBG539]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG540:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i1 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG541:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR]], [[META535:![0-9]+]], !DIExpression(), [[DBG541]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i1 [[X_CURR]], [[BITMASK]], !dbg [[DBG542:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_BITMASKED]], [[META536:![0-9]+]], !DIExpression(), [[DBG542]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i1 [[X_CURR_BITMASKED]], false, !dbg [[DBG543:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META537:![0-9]+]], !DIExpression(), [[DBG543]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i1 [[X_CURR]], true, !dbg [[DBG544:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_NEXT]], [[META538:![0-9]+]], !DIExpression(), [[DBG544]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG545:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i1 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG541]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i1 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG544]] |
| ; NOLZCNT-NEXT: store i1 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 1, !dbg [[DBG546:![0-9]+]] |
| ; NOLZCNT-NEXT: store i1 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 1, !dbg [[DBG547:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG548:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i1 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i1 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i1 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i1 %x.curr.bitmasked, 0 |
| %x.next = shl i1 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i1 %x.curr, ptr %p0 |
| store i1 %x.next, ptr %p1 |
| ret void |
| } |
| define void @t36_i2(i2 %x, i2 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @t36_i2( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i2 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i2 1, [[BIT_FR]], !dbg [[DBG556:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i2 [[BITMASK]], [[META551:![0-9]+]], !DIExpression(), [[DBG556]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i2 [[BITMASK]], -1, !dbg [[DBG557:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i2 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i2 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i2 @llvm.ctlz.i2(i2 [[X_MASKED]], i1 true), !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw i2 -2, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add i2 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i2 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw i2 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i2 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i2 [[X_CURR]], 1, !dbg [[DBG557]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG558:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i2 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i2 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG557]] |
| ; LZCNT-NEXT: #dbg_value(i2 [[TMP0]], [[META552:![0-9]+]], !DIExpression(), [[DBG557]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i2 [[TMP0]], [[BITMASK]], !dbg [[DBG559:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i2 [[X_CURR_BITMASKED]], [[META553:![0-9]+]], !DIExpression(), [[DBG559]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i2 [[X_CURR_BITMASKED]], 0, !dbg [[DBG560:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META554:![0-9]+]], !DIExpression(), [[DBG560]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i2 [[TMP0]], 1, !dbg [[DBG561:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i2 [[TMP1]], [[META555:![0-9]+]], !DIExpression(), [[DBG561]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw i2 [[LOOP_IV]], 1, !dbg [[DBG562:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i2 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG562]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG562]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i2 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG557]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i2 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG561]] |
| ; LZCNT-NEXT: store i2 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 1, !dbg [[DBG563:![0-9]+]] |
| ; LZCNT-NEXT: store i2 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 1, !dbg [[DBG564:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG565:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @t36_i2( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i2 1, [[BIT:%.*]], !dbg [[DBG556:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i2 [[BITMASK]], [[META551:![0-9]+]], !DIExpression(), [[DBG556]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG557:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i2 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG558:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i2 [[X_CURR]], [[META552:![0-9]+]], !DIExpression(), [[DBG558]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i2 [[X_CURR]], [[BITMASK]], !dbg [[DBG559:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i2 [[X_CURR_BITMASKED]], [[META553:![0-9]+]], !DIExpression(), [[DBG559]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i2 [[X_CURR_BITMASKED]], 0, !dbg [[DBG560:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META554:![0-9]+]], !DIExpression(), [[DBG560]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i2 [[X_CURR]], 1, !dbg [[DBG561:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i2 [[X_NEXT]], [[META555:![0-9]+]], !DIExpression(), [[DBG561]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG562:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i2 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG558]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i2 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG561]] |
| ; NOLZCNT-NEXT: store i2 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 1, !dbg [[DBG563:![0-9]+]] |
| ; NOLZCNT-NEXT: store i2 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 1, !dbg [[DBG564:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG565:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i2 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i2 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i2 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i2 %x.curr.bitmasked, 0 |
| %x.next = shl i2 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i2 %x.curr, ptr %p0 |
| store i2 %x.next, ptr %p1 |
| ret void |
| } |
| define void @t37_i3(i3 %x, i3 %bit, ptr %p0, ptr %p1) { |
| ; LZCNT-LABEL: @t37_i3( |
| ; LZCNT-NEXT: entry: |
| ; LZCNT-NEXT: [[BIT_FR:%.*]] = freeze i3 [[BIT:%.*]] |
| ; LZCNT-NEXT: [[BITMASK:%.*]] = shl i3 1, [[BIT_FR]], !dbg [[DBG573:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i3 [[BITMASK]], [[META568:![0-9]+]], !DIExpression(), [[DBG573]]) |
| ; LZCNT-NEXT: [[BIT_FR_LOWBITMASK:%.*]] = add i3 [[BITMASK]], -1, !dbg [[DBG574:![0-9]+]] |
| ; LZCNT-NEXT: [[BIT_FR_MASK:%.*]] = or i3 [[BIT_FR_LOWBITMASK]], [[BITMASK]], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_MASKED:%.*]] = and i3 [[X:%.*]], [[BIT_FR_MASK]], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMLEADINGZEROS:%.*]] = call i3 @llvm.ctlz.i3(i3 [[X_MASKED]], i1 true), !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_MASKED_NUMACTIVEBITS:%.*]] = sub nuw nsw i3 3, [[X_MASKED_NUMLEADINGZEROS]], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_MASKED_LEADINGONEPOS:%.*]] = add nsw i3 [[X_MASKED_NUMACTIVEBITS]], -1, !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nuw nsw i3 [[BIT_FR]], [[X_MASKED_LEADINGONEPOS]], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i3 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_CURR:%.*]] = shl i3 [[X]], [[LOOP_BACKEDGETAKENCOUNT]], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_NEXT:%.*]] = shl i3 [[X_CURR]], 1, !dbg [[DBG574]] |
| ; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG575:![0-9]+]] |
| ; LZCNT: loop: |
| ; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i3 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[TMP0:%.*]] = phi i3 [ [[X]], [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ], !dbg [[DBG574]] |
| ; LZCNT-NEXT: #dbg_value(i3 [[TMP0]], [[META569:![0-9]+]], !DIExpression(), [[DBG574]]) |
| ; LZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i3 [[TMP0]], [[BITMASK]], !dbg [[DBG576:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i3 [[X_CURR_BITMASKED]], [[META570:![0-9]+]], !DIExpression(), [[DBG576]]) |
| ; LZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i3 [[X_CURR_BITMASKED]], 0, !dbg [[DBG577:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META571:![0-9]+]], !DIExpression(), [[DBG577]]) |
| ; LZCNT-NEXT: [[TMP1]] = shl i3 [[TMP0]], 1, !dbg [[DBG578:![0-9]+]] |
| ; LZCNT-NEXT: #dbg_value(i3 [[TMP1]], [[META572:![0-9]+]], !DIExpression(), [[DBG578]]) |
| ; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i3 [[LOOP_IV]], 1, !dbg [[DBG579:![0-9]+]] |
| ; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i3 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG579]] |
| ; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG579]] |
| ; LZCNT: end: |
| ; LZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i3 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG574]] |
| ; LZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i3 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG578]] |
| ; LZCNT-NEXT: store i3 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 1, !dbg [[DBG580:![0-9]+]] |
| ; LZCNT-NEXT: store i3 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 1, !dbg [[DBG581:![0-9]+]] |
| ; LZCNT-NEXT: ret void, !dbg [[DBG582:![0-9]+]] |
| ; |
| ; NOLZCNT-LABEL: @t37_i3( |
| ; NOLZCNT-NEXT: entry: |
| ; NOLZCNT-NEXT: [[BITMASK:%.*]] = shl i3 1, [[BIT:%.*]], !dbg [[DBG573:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i3 [[BITMASK]], [[META568:![0-9]+]], !DIExpression(), [[DBG573]]) |
| ; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG574:![0-9]+]] |
| ; NOLZCNT: loop: |
| ; NOLZCNT-NEXT: [[X_CURR:%.*]] = phi i3 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[X_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG575:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i3 [[X_CURR]], [[META569:![0-9]+]], !DIExpression(), [[DBG575]]) |
| ; NOLZCNT-NEXT: [[X_CURR_BITMASKED:%.*]] = and i3 [[X_CURR]], [[BITMASK]], !dbg [[DBG576:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i3 [[X_CURR_BITMASKED]], [[META570:![0-9]+]], !DIExpression(), [[DBG576]]) |
| ; NOLZCNT-NEXT: [[X_CURR_ISBITUNSET:%.*]] = icmp eq i3 [[X_CURR_BITMASKED]], 0, !dbg [[DBG577:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i1 [[X_CURR_ISBITUNSET]], [[META571:![0-9]+]], !DIExpression(), [[DBG577]]) |
| ; NOLZCNT-NEXT: [[X_NEXT]] = shl i3 [[X_CURR]], 1, !dbg [[DBG578:![0-9]+]] |
| ; NOLZCNT-NEXT: #dbg_value(i3 [[X_NEXT]], [[META572:![0-9]+]], !DIExpression(), [[DBG578]]) |
| ; NOLZCNT-NEXT: br i1 [[X_CURR_ISBITUNSET]], label [[LOOP]], label [[END:%.*]], !dbg [[DBG579:![0-9]+]] |
| ; NOLZCNT: end: |
| ; NOLZCNT-NEXT: [[X_CURR_LCSSA:%.*]] = phi i3 [ [[X_CURR]], [[LOOP]] ], !dbg [[DBG575]] |
| ; NOLZCNT-NEXT: [[X_NEXT_LCSSA:%.*]] = phi i3 [ [[X_NEXT]], [[LOOP]] ], !dbg [[DBG578]] |
| ; NOLZCNT-NEXT: store i3 [[X_CURR_LCSSA]], ptr [[P0:%.*]], align 1, !dbg [[DBG580:![0-9]+]] |
| ; NOLZCNT-NEXT: store i3 [[X_NEXT_LCSSA]], ptr [[P1:%.*]], align 1, !dbg [[DBG581:![0-9]+]] |
| ; NOLZCNT-NEXT: ret void, !dbg [[DBG582:![0-9]+]] |
| ; |
| entry: |
| %bitmask = shl i3 1, %bit |
| br label %loop |
| |
| loop: |
| %x.curr = phi i3 [ %x, %entry ], [ %x.next, %loop ] |
| %x.curr.bitmasked = and i3 %x.curr, %bitmask |
| %x.curr.isbitunset = icmp eq i3 %x.curr.bitmasked, 0 |
| %x.next = shl i3 %x.curr, 1 |
| br i1 %x.curr.isbitunset, label %loop, label %end |
| |
| end: |
| store i3 %x.curr, ptr %p0 |
| store i3 %x.next, ptr %p1 |
| ret void |
| } |
