llvm/test/Transforms/PhaseOrdering/AArch64/extra-unroll-simplifications.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -passes="default<O3>" -S %s | FileCheck %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-macosx11.0.0"

define void @partial_unroll_forced(i32 %N, ptr %src, ptr noalias %dst) {
; CHECK-LABEL: define void @partial_unroll_forced(
; CHECK-SAME: i32 [[N:%.*]], ptr nocapture readonly [[SRC:%.*]], ptr noalias nocapture writeonly [[DST:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP141:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP141]], label [[LOOP_LATCH_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK:       loop.latch.preheader:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[XTRAITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 1
; CHECK-NEXT:    [[TMP0:%.*]] = icmp eq i32 [[N]], 1
; CHECK-NEXT:    br i1 [[TMP0]], label [[EXIT_LOOPEXIT_UNR_LCSSA:%.*]], label [[LOOP_LATCH_PREHEADER_NEW:%.*]]
; CHECK:       loop.latch.preheader.new:
; CHECK-NEXT:    [[UNROLL_ITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 2147483646
; CHECK-NEXT:    br label [[LOOP_LATCH:%.*]]
; CHECK:       loop.latch:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_1:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[NITER:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[SRC_IDX:%.*]] = getelementptr <8 x half>, ptr [[SRC]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[L:%.*]] = load <8 x half>, ptr [[SRC_IDX]], align 16
; CHECK-NEXT:    [[DST_IDX:%.*]] = getelementptr <8 x half>, ptr [[DST]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[ADD:%.*]] = fadd <8 x half> [[L]], [[L]]
; CHECK-NEXT:    store <8 x half> [[ADD]], ptr [[DST_IDX]], align 16
; CHECK-NEXT:    [[INDVARS_IV_NEXT:%.*]] = or disjoint i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[SRC_IDX_1:%.*]] = getelementptr <8 x half>, ptr [[SRC]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT:    [[L_1:%.*]] = load <8 x half>, ptr [[SRC_IDX_1]], align 16
; CHECK-NEXT:    [[DST_IDX_1:%.*]] = getelementptr <8 x half>, ptr [[DST]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT:    [[ADD_1:%.*]] = fadd <8 x half> [[L_1]], [[L_1]]
; CHECK-NEXT:    store <8 x half> [[ADD_1]], ptr [[DST_IDX_1]], align 16
; CHECK-NEXT:    [[INDVARS_IV_NEXT_1]] = add nuw nsw i64 [[INDVARS_IV]], 2
; CHECK-NEXT:    [[NITER_NEXT_1]] = add i64 [[NITER]], 2
; CHECK-NEXT:    [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]]
; CHECK-NEXT:    br i1 [[NITER_NCMP_1]], label [[EXIT_LOOPEXIT_UNR_LCSSA]], label [[LOOP_LATCH]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       exit.loopexit.unr-lcssa:
; CHECK-NEXT:    [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER]] ], [ [[INDVARS_IV_NEXT_1]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0
; CHECK-NEXT:    br i1 [[LCMP_MOD_NOT]], label [[EXIT]], label [[LOOP_LATCH_EPIL:%.*]]
; CHECK:       loop.latch.epil:
; CHECK-NEXT:    [[SRC_IDX_EPIL:%.*]] = getelementptr <8 x half>, ptr [[SRC]], i64 [[INDVARS_IV_UNR]]
; CHECK-NEXT:    [[L_EPIL:%.*]] = load <8 x half>, ptr [[SRC_IDX_EPIL]], align 16
; CHECK-NEXT:    [[DST_IDX_EPIL:%.*]] = getelementptr <8 x half>, ptr [[DST]], i64 [[INDVARS_IV_UNR]]
; CHECK-NEXT:    [[ADD_EPIL:%.*]] = fadd <8 x half> [[L_EPIL]], [[L_EPIL]]
; CHECK-NEXT:    store <8 x half> [[ADD_EPIL]], ptr [[DST_IDX_EPIL]], align 16
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ]
  %cmp14 = icmp slt i32 %iv, %N
  br i1 %cmp14, label %loop.latch, label %exit

loop.latch:
  %iv.ext = zext i32 %iv to i64
  %src.idx = getelementptr <8 x half>, ptr %src, i64 %iv.ext
  %l = load <8 x half>, ptr %src.idx, align 16
  %dst.idx = getelementptr <8 x half>, ptr %dst, i64 %iv.ext
  %add = fadd <8 x half> %l, %l
  store <8 x half> %add, ptr %dst.idx, align 16
  %iv.next = add i32 %iv, 1
  br label %loop.header, !llvm.loop !0

exit:
  ret void
}

define void @cse_matching_load_from_previous_unrolled_iteration(i32 %N, ptr %src, ptr noalias %dst) {
; CHECK-LABEL: define void @cse_matching_load_from_previous_unrolled_iteration(
; CHECK-SAME: i32 [[N:%.*]], ptr nocapture readonly [[SRC:%.*]], ptr noalias nocapture writeonly [[DST:%.*]]) local_unnamed_addr #[[ATTR0]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4
; CHECK-NEXT:    [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12
; CHECK-NEXT:    [[CMP141:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP141]], label [[LOOP_LATCH_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK:       loop.latch.preheader:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[XTRAITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 1
; CHECK-NEXT:    [[TMP0:%.*]] = icmp eq i32 [[N]], 1
; CHECK-NEXT:    br i1 [[TMP0]], label [[EXIT_LOOPEXIT_UNR_LCSSA:%.*]], label [[LOOP_LATCH_PREHEADER_NEW:%.*]]
; CHECK:       loop.latch.preheader.new:
; CHECK-NEXT:    [[UNROLL_ITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 2147483646
; CHECK-NEXT:    br label [[LOOP_LATCH:%.*]]
; CHECK:       loop.latch:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_1:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[NITER:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[GEP_SRC_12:%.*]] = getelementptr <2 x i32>, ptr [[SRC_12]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[L_12:%.*]] = load <2 x i32>, ptr [[GEP_SRC_12]], align 8
; CHECK-NEXT:    [[GEP_SRC_4:%.*]] = getelementptr <2 x i32>, ptr [[SRC_4]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[L_4:%.*]] = load <2 x i32>, ptr [[GEP_SRC_4]], align 8
; CHECK-NEXT:    [[MUL:%.*]] = mul <2 x i32> [[L_4]], [[L_12]]
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr <2 x i32>, ptr [[DST]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store <2 x i32> [[MUL]], ptr [[GEP_DST]], align 8
; CHECK-NEXT:    [[INDVARS_IV_NEXT:%.*]] = or disjoint i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[GEP_SRC_12_1:%.*]] = getelementptr <2 x i32>, ptr [[SRC_12]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT:    [[L_12_1:%.*]] = load <2 x i32>, ptr [[GEP_SRC_12_1]], align 8
; CHECK-NEXT:    [[MUL_1:%.*]] = mul <2 x i32> [[L_12]], [[L_12_1]]
; CHECK-NEXT:    [[GEP_DST_1:%.*]] = getelementptr <2 x i32>, ptr [[DST]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT:    store <2 x i32> [[MUL_1]], ptr [[GEP_DST_1]], align 8
; CHECK-NEXT:    [[INDVARS_IV_NEXT_1]] = add nuw nsw i64 [[INDVARS_IV]], 2
; CHECK-NEXT:    [[NITER_NEXT_1]] = add i64 [[NITER]], 2
; CHECK-NEXT:    [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]]
; CHECK-NEXT:    br i1 [[NITER_NCMP_1]], label [[EXIT_LOOPEXIT_UNR_LCSSA]], label [[LOOP_LATCH]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       exit.loopexit.unr-lcssa:
; CHECK-NEXT:    [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER]] ], [ [[INDVARS_IV_NEXT_1]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0
; CHECK-NEXT:    br i1 [[LCMP_MOD_NOT]], label [[EXIT]], label [[LOOP_LATCH_EPIL:%.*]]
; CHECK:       loop.latch.epil:
; CHECK-NEXT:    [[GEP_SRC_12_EPIL:%.*]] = getelementptr <2 x i32>, ptr [[SRC_12]], i64 [[INDVARS_IV_UNR]]
; CHECK-NEXT:    [[L_12_EPIL:%.*]] = load <2 x i32>, ptr [[GEP_SRC_12_EPIL]], align 8
; CHECK-NEXT:    [[GEP_SRC_4_EPIL:%.*]] = getelementptr <2 x i32>, ptr [[SRC_4]], i64 [[INDVARS_IV_UNR]]
; CHECK-NEXT:    [[L_4_EPIL:%.*]] = load <2 x i32>, ptr [[GEP_SRC_4_EPIL]], align 8
; CHECK-NEXT:    [[MUL_EPIL:%.*]] = mul <2 x i32> [[L_4_EPIL]], [[L_12_EPIL]]
; CHECK-NEXT:    [[GEP_DST_EPIL:%.*]] = getelementptr <2 x i32>, ptr [[DST]], i64 [[INDVARS_IV_UNR]]
; CHECK-NEXT:    store <2 x i32> [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  %src.4 = getelementptr i8, ptr %src, i64 4
  %src.12 = getelementptr i8, ptr %src, i64 12
  br label %loop.header

loop.header:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ]
  %cmp14 = icmp slt i32 %iv, %N
  br i1 %cmp14, label %loop.latch, label %exit

loop.latch:
  %iv.ext = zext i32 %iv to i64
  %gep.src.12 = getelementptr <2 x i32>, ptr %src.12, i64 %iv.ext
  %l.12 = load <2 x i32>, ptr %gep.src.12, align 8
  %gep.src.4 = getelementptr <2 x i32>, ptr %src.4, i64 %iv.ext
  %l.4 = load <2 x i32>, ptr %gep.src.4, align 8
  %mul = mul <2 x i32> %l.12, %l.4
  %gep.dst = getelementptr <2 x i32>, ptr %dst, i64 %iv.ext
  store <2 x i32> %mul, ptr %gep.dst
  %iv.next = add nuw nsw i32 %iv, 1
  br label %loop.header, !llvm.loop !0

exit:
  ret void
}

!0 = distinct !{!0, !1, !2}
!1 = !{!"llvm.loop.mustprogress"}
!2 = !{!"llvm.loop.unroll.count", i32 2}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.mustprogress"}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]], [[META2]]}
;.