| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 |
| ; PR23524 |
| ; The test is to check redundency produced by loop unroll pass |
| ; should be cleaned up by later pass. |
| ; RUN: opt < %s -O2 -S | FileCheck %s |
| |
| ; After loop unroll: |
| ; %dec18 = add nsw i32 %dec18.in, -1 |
| ; ... |
| ; %dec18.1 = add nsw i32 %dec18, -1 |
| ; should be merged to: |
| ; %dec18.1 = add nsw i32 %dec18.in, -2 |
| ; |
| |
| ; ModuleID = '<stdin>' |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @b = global i32 0, align 4 |
| @c = global i32 0, align 4 |
| |
| ; Function Attrs: nounwind uwtable |
| define void @_Z3fn1v(ptr %r, ptr %a) #0 { |
| ; CHECK-LABEL: define void @_Z3fn1v( |
| ; CHECK-SAME: ptr nocapture writeonly [[R:%.*]], ptr nocapture readonly [[A:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] { |
| ; CHECK-NEXT: [[ENTRY:.*]]: |
| ; CHECK-NEXT: [[TMP:%.*]] = load i32, ptr @b, align 4 |
| ; CHECK-NEXT: [[TOBOOL20:%.*]] = icmp eq i32 [[TMP]], 0 |
| ; CHECK-NEXT: br i1 [[TOBOOL20]], label %[[FOR_END6:.*]], label %[[FOR_BODY:.*]] |
| ; CHECK: [[FOR_COND_LOOPEXIT_LOOPEXIT:.*]]: |
| ; CHECK-NEXT: [[ADD_PTR_LCSSA:%.*]] = phi ptr [ [[ADD_PTR_LCSSA_UNR:%.*]], %[[FOR_BODY3_PROL_LOOPEXIT:.*]] ], [ [[ADD_PTR_1:%.*]], %[[FOR_INC_1:.*]] ] |
| ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A_021:%.*]], i64 1 |
| ; CHECK-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[SCEVGEP]], i64 [[TMP1:%.*]] |
| ; CHECK-NEXT: [[TMP1_PRE:%.*]] = load i32, ptr @b, align 4 |
| ; CHECK-NEXT: br label %[[FOR_COND_LOOPEXIT:.*]] |
| ; CHECK: [[FOR_COND_LOOPEXIT]]: |
| ; CHECK-NEXT: [[T1:%.*]] = phi i32 [ [[T12:%.*]], %[[FOR_BODY]] ], [ [[TMP1_PRE]], %[[FOR_COND_LOOPEXIT_LOOPEXIT]] ] |
| ; CHECK-NEXT: [[R_1_LCSSA:%.*]] = phi ptr [ [[R_022:%.*]], %[[FOR_BODY]] ], [ [[ADD_PTR_LCSSA]], %[[FOR_COND_LOOPEXIT_LOOPEXIT]] ] |
| ; CHECK-NEXT: [[A_1_LCSSA:%.*]] = phi ptr [ [[A_021]], %[[FOR_BODY]] ], [ [[SCEVGEP1]], %[[FOR_COND_LOOPEXIT_LOOPEXIT]] ] |
| ; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[T1]], 0 |
| ; CHECK-NEXT: br i1 [[TOBOOL]], label %[[FOR_END6]], label %[[FOR_BODY]] |
| ; CHECK: [[FOR_BODY]]: |
| ; CHECK-NEXT: [[T12]] = phi i32 [ [[T1]], %[[FOR_COND_LOOPEXIT]] ], [ [[TMP]], %[[ENTRY]] ] |
| ; CHECK-NEXT: [[R_022]] = phi ptr [ [[R_1_LCSSA]], %[[FOR_COND_LOOPEXIT]] ], [ [[R]], %[[ENTRY]] ] |
| ; CHECK-NEXT: [[A_021]] = phi ptr [ [[A_1_LCSSA]], %[[FOR_COND_LOOPEXIT]] ], [ [[A]], %[[ENTRY]] ] |
| ; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr @c, align 4 |
| ; CHECK-NEXT: [[TOBOOL215:%.*]] = icmp eq i32 [[TMP2]], 0 |
| ; CHECK-NEXT: br i1 [[TOBOOL215]], label %[[FOR_COND_LOOPEXIT]], label %[[FOR_BODY3_PREHEADER:.*]] |
| ; CHECK: [[FOR_BODY3_PREHEADER]]: |
| ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[TMP2]], -1 |
| ; CHECK-NEXT: [[TMP1]] = zext i32 [[TMP0]] to i64 |
| ; CHECK-NEXT: [[XTRAITER:%.*]] = and i32 [[TMP2]], 1 |
| ; CHECK-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i32 [[XTRAITER]], 0 |
| ; CHECK-NEXT: br i1 [[LCMP_MOD_NOT]], label %[[FOR_BODY3_PROL_LOOPEXIT]], label %[[FOR_BODY3_PROL:.*]] |
| ; CHECK: [[FOR_BODY3_PROL]]: |
| ; CHECK-NEXT: [[DEC18_PROL:%.*]] = add nsw i32 [[TMP2]], -1 |
| ; CHECK-NEXT: [[TMP3_PROL:%.*]] = load i8, ptr [[A_021]], align 1 |
| ; CHECK-NEXT: [[CMP_PROL:%.*]] = icmp eq i8 [[TMP3_PROL]], 0 |
| ; CHECK-NEXT: br i1 [[CMP_PROL]], label %[[IF_THEN_PROL:.*]], label %[[FOR_INC_PROL:.*]] |
| ; CHECK: [[IF_THEN_PROL]]: |
| ; CHECK-NEXT: [[ARRAYIDX_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[R_022]], i64 2 |
| ; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX_PROL]], align 2 |
| ; CHECK-NEXT: store i16 0, ptr [[R_022]], align 2 |
| ; CHECK-NEXT: [[ARRAYIDX5_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[R_022]], i64 4 |
| ; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX5_PROL]], align 2 |
| ; CHECK-NEXT: br label %[[FOR_INC_PROL]] |
| ; CHECK: [[FOR_INC_PROL]]: |
| ; CHECK-NEXT: [[INCDEC_PTR_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[A_021]], i64 1 |
| ; CHECK-NEXT: [[ADD_PTR_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[R_022]], i64 6 |
| ; CHECK-NEXT: br label %[[FOR_BODY3_PROL_LOOPEXIT]] |
| ; CHECK: [[FOR_BODY3_PROL_LOOPEXIT]]: |
| ; CHECK-NEXT: [[ADD_PTR_LCSSA_UNR]] = phi ptr [ poison, %[[FOR_BODY3_PREHEADER]] ], [ [[ADD_PTR_PROL]], %[[FOR_INC_PROL]] ] |
| ; CHECK-NEXT: [[DEC18_IN_UNR:%.*]] = phi i32 [ [[TMP2]], %[[FOR_BODY3_PREHEADER]] ], [ [[DEC18_PROL]], %[[FOR_INC_PROL]] ] |
| ; CHECK-NEXT: [[R_117_UNR:%.*]] = phi ptr [ [[R_022]], %[[FOR_BODY3_PREHEADER]] ], [ [[ADD_PTR_PROL]], %[[FOR_INC_PROL]] ] |
| ; CHECK-NEXT: [[A_116_UNR:%.*]] = phi ptr [ [[A_021]], %[[FOR_BODY3_PREHEADER]] ], [ [[INCDEC_PTR_PROL]], %[[FOR_INC_PROL]] ] |
| ; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP0]], 0 |
| ; CHECK-NEXT: br i1 [[TMP4]], label %[[FOR_COND_LOOPEXIT_LOOPEXIT]], label %[[FOR_BODY3:.*]] |
| ; CHECK: [[FOR_BODY3]]: |
| ; CHECK-NEXT: [[DEC18_IN:%.*]] = phi i32 [ [[DEC18_1:%.*]], %[[FOR_INC_1]] ], [ [[DEC18_IN_UNR]], %[[FOR_BODY3_PROL_LOOPEXIT]] ] |
| ; CHECK-NEXT: [[R_117:%.*]] = phi ptr [ [[ADD_PTR_1]], %[[FOR_INC_1]] ], [ [[R_117_UNR]], %[[FOR_BODY3_PROL_LOOPEXIT]] ] |
| ; CHECK-NEXT: [[A_116:%.*]] = phi ptr [ [[INCDEC_PTR_1:%.*]], %[[FOR_INC_1]] ], [ [[A_116_UNR]], %[[FOR_BODY3_PROL_LOOPEXIT]] ] |
| ; CHECK-NEXT: [[TMP3:%.*]] = load i8, ptr [[A_116]], align 1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[TMP3]], 0 |
| ; CHECK-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[FOR_INC:.*]] |
| ; CHECK: [[IF_THEN]]: |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 2 |
| ; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX]], align 2 |
| ; CHECK-NEXT: store i16 0, ptr [[R_117]], align 2 |
| ; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 4 |
| ; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX5]], align 2 |
| ; CHECK-NEXT: br label %[[FOR_INC]] |
| ; CHECK: [[FOR_INC]]: |
| ; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw i8, ptr [[A_116]], i64 1 |
| ; CHECK-NEXT: [[DEC18_1]] = add nsw i32 [[DEC18_IN]], -2 |
| ; CHECK-NEXT: [[TMP3_1:%.*]] = load i8, ptr [[INCDEC_PTR]], align 1 |
| ; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i8 [[TMP3_1]], 0 |
| ; CHECK-NEXT: br i1 [[CMP_1]], label %[[IF_THEN_1:.*]], label %[[FOR_INC_1]] |
| ; CHECK: [[IF_THEN_1]]: |
| ; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 6 |
| ; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 8 |
| ; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX_1]], align 2 |
| ; CHECK-NEXT: store i16 0, ptr [[ADD_PTR]], align 2 |
| ; CHECK-NEXT: [[ARRAYIDX5_1:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 10 |
| ; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX5_1]], align 2 |
| ; CHECK-NEXT: br label %[[FOR_INC_1]] |
| ; CHECK: [[FOR_INC_1]]: |
| ; CHECK-NEXT: [[INCDEC_PTR_1]] = getelementptr inbounds nuw i8, ptr [[A_116]], i64 2 |
| ; CHECK-NEXT: [[ADD_PTR_1]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 12 |
| ; CHECK-NEXT: [[TOBOOL2_1:%.*]] = icmp eq i32 [[DEC18_1]], 0 |
| ; CHECK-NEXT: br i1 [[TOBOOL2_1]], label %[[FOR_COND_LOOPEXIT_LOOPEXIT]], label %[[FOR_BODY3]], !llvm.loop [[LOOP0:![0-9]+]] |
| ; CHECK: [[FOR_END6]]: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %t = load i32, ptr @b, align 4 |
| %tobool20 = icmp eq i32 %t, 0 |
| br i1 %tobool20, label %for.end6, label %for.body.lr.ph |
| |
| for.body.lr.ph: ; preds = %entry |
| br label %for.body |
| |
| for.cond1.for.cond.loopexit_crit_edge: ; preds = %for.inc |
| %add.ptr.lcssa = phi ptr [ %add.ptr, %for.inc ] |
| %incdec.ptr.lcssa = phi ptr [ %incdec.ptr, %for.inc ] |
| br label %for.cond.loopexit |
| |
| for.cond.loopexit: ; preds = %for.body, %for.cond1.for.cond.loopexit_crit_edge |
| %r.1.lcssa = phi ptr [ %add.ptr.lcssa, %for.cond1.for.cond.loopexit_crit_edge ], [ %r.022, %for.body ] |
| %a.1.lcssa = phi ptr [ %incdec.ptr.lcssa, %for.cond1.for.cond.loopexit_crit_edge ], [ %a.021, %for.body ] |
| %t1 = load i32, ptr @b, align 4 |
| %tobool = icmp eq i32 %t1, 0 |
| br i1 %tobool, label %for.cond.for.end6_crit_edge, label %for.body |
| |
| for.body: ; preds = %for.cond.loopexit, %for.body.lr.ph |
| %r.022 = phi ptr [ %r, %for.body.lr.ph ], [ %r.1.lcssa, %for.cond.loopexit ] |
| %a.021 = phi ptr [ %a, %for.body.lr.ph ], [ %a.1.lcssa, %for.cond.loopexit ] |
| %t2 = load i32, ptr @c, align 4 |
| %tobool215 = icmp eq i32 %t2, 0 |
| br i1 %tobool215, label %for.cond.loopexit, label %for.body3.lr.ph |
| |
| for.body3.lr.ph: ; preds = %for.body |
| br label %for.body3 |
| |
| for.body3: ; preds = %for.inc, %for.body3.lr.ph |
| %dec18.in = phi i32 [ %t2, %for.body3.lr.ph ], [ %dec18, %for.inc ] |
| %r.117 = phi ptr [ %r.022, %for.body3.lr.ph ], [ %add.ptr, %for.inc ] |
| %a.116 = phi ptr [ %a.021, %for.body3.lr.ph ], [ %incdec.ptr, %for.inc ] |
| %dec18 = add nsw i32 %dec18.in, -1 |
| %t3 = load i8, ptr %a.116, align 1 |
| %cmp = icmp eq i8 %t3, 0 |
| br i1 %cmp, label %if.then, label %for.inc |
| |
| if.then: ; preds = %for.body3 |
| %arrayidx = getelementptr inbounds i16, ptr %r.117, i64 1 |
| store i16 0, ptr %arrayidx, align 2 |
| store i16 0, ptr %r.117, align 2 |
| %arrayidx5 = getelementptr inbounds i16, ptr %r.117, i64 2 |
| store i16 0, ptr %arrayidx5, align 2 |
| br label %for.inc |
| |
| for.inc: ; preds = %if.then, %for.body3 |
| %incdec.ptr = getelementptr inbounds i8, ptr %a.116, i64 1 |
| %add.ptr = getelementptr inbounds i16, ptr %r.117, i64 3 |
| %tobool2 = icmp eq i32 %dec18, 0 |
| br i1 %tobool2, label %for.cond1.for.cond.loopexit_crit_edge, label %for.body3, !llvm.loop !0 |
| |
| for.cond.for.end6_crit_edge: ; preds = %for.cond.loopexit |
| br label %for.end6 |
| |
| for.end6: ; preds = %for.cond.for.end6_crit_edge, %entry |
| ret void |
| } |
| |
| !0 = !{!0, !1} |
| !1 = !{!"llvm.loop.unroll.count", i32 2} |
| ;. |
| ; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]]} |
| ; CHECK: [[META1]] = !{!"llvm.loop.unroll.disable"} |
| ;. |
