| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -simplifycfg < %s | FileCheck %s |
| ; |
| ; The branch in the latch do.cond is conditional by a constant and the |
| ; conditional branch replaced by an unconditional one. |
| ; Ensure that the llvm.loop metadata is transferred to the new branch |
| ; (In for.cond.cleanup after further simplifications). |
| ; |
| ; llvm.org/PR50060 |
| ; |
| |
| @n = dso_local global i32 0, align 4 |
| @C = dso_local global i32 0, align 4 |
| |
| ; Function Attrs: nounwind |
| define dso_local void @_Z6test01v() addrspace(1) #0 { |
| ; CHECK-LABEL: @_Z6test01v( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[J:%.*]] = alloca i32, align 4 |
| ; CHECK-NEXT: [[I:%.*]] = alloca i32, align 4 |
| ; CHECK-NEXT: br label [[DO_BODY:%.*]] |
| ; CHECK: do.body: |
| ; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @C, align 4, !tbaa [[TBAA2:![0-9]+]] |
| ; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP0]], 1 |
| ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32* [[J]] to i8* |
| ; CHECK-NEXT: call addrspace(1) void @llvm.lifetime.start.p0i8(i64 4, i8* [[TMP1]]) #[[ATTR2:[0-9]+]] |
| ; CHECK-NEXT: store i32 0, i32* [[J]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[J]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[TMP2]], 3 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]] |
| ; CHECK: for.cond.cleanup: |
| ; CHECK-NEXT: [[TMP3:%.*]] = bitcast i32* [[J]] to i8* |
| ; CHECK-NEXT: call addrspace(1) void @llvm.lifetime.end.p0i8(i64 4, i8* [[TMP3]]) #[[ATTR2]] |
| ; CHECK-NEXT: br label [[DO_BODY]], !llvm.loop [[LOOP6:![0-9]+]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: store i32 undef, i32* [[I]], align 4 |
| ; CHECK-NEXT: [[TMP4:%.*]] = bitcast i32* [[I]] to i8* |
| ; CHECK-NEXT: call addrspace(1) void @llvm.lifetime.start.p0i8(i64 4, i8* [[TMP4]]) #[[ATTR2]] |
| ; CHECK-NEXT: store i32 0, i32* [[I]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: br label [[FOR_COND1:%.*]] |
| ; CHECK: for.cond1: |
| ; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[I]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = load i32, i32* @n, align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[TMP5]], [[TMP6]] |
| ; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_BODY4:%.*]], label [[FOR_COND_CLEANUP3:%.*]] |
| ; CHECK: for.cond.cleanup3: |
| ; CHECK-NEXT: [[TMP7:%.*]] = bitcast i32* [[I]] to i8* |
| ; CHECK-NEXT: call addrspace(1) void @llvm.lifetime.end.p0i8(i64 4, i8* [[TMP7]]) #[[ATTR2]] |
| ; CHECK-NEXT: [[TMP8:%.*]] = load i32, i32* [[J]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: [[INC7:%.*]] = add nsw i32 [[TMP8]], 1 |
| ; CHECK-NEXT: store i32 [[INC7]], i32* [[J]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP8:![0-9]+]] |
| ; CHECK: for.body4: |
| ; CHECK-NEXT: [[TMP9:%.*]] = load i32, i32* [[I]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: store volatile i32 [[TMP9]], i32* @C, align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: [[TMP10:%.*]] = load i32, i32* [[I]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: [[INC5:%.*]] = add nsw i32 [[TMP10]], 1 |
| ; CHECK-NEXT: store i32 [[INC5]], i32* [[I]], align 4, !tbaa [[TBAA2]] |
| ; CHECK-NEXT: br label [[FOR_COND1]], !llvm.loop [[LOOP11:![0-9]+]] |
| ; |
| entry: |
| %j = alloca i32, align 4 |
| %i = alloca i32, align 4 |
| br label %do.body |
| |
| do.body: ; preds = %do.cond, %entry |
| %0 = load i32, i32* @C, align 4, !tbaa !2 |
| %inc = add nsw i32 %0, 1 |
| %1 = bitcast i32* %j to i8* |
| call addrspace(1) void @llvm.lifetime.start.p0i8(i64 4, i8* %1) #2 |
| store i32 0, i32* %j, align 4, !tbaa !2 |
| br label %for.cond |
| |
| for.cond: ; preds = %for.inc6, %do.body |
| %2 = load i32, i32* %j, align 4, !tbaa !2 |
| %cmp = icmp slt i32 %2, 3 |
| br i1 %cmp, label %for.body, label %for.cond.cleanup |
| |
| for.cond.cleanup: ; preds = %for.cond |
| %3 = bitcast i32* %j to i8* |
| call addrspace(1) void @llvm.lifetime.end.p0i8(i64 4, i8* %3) #2 |
| br label %for.end8 |
| |
| for.body: ; preds = %for.cond |
| store i32 undef, i32* %i, align 4 |
| %4 = bitcast i32* %i to i8* |
| call addrspace(1) void @llvm.lifetime.start.p0i8(i64 4, i8* %4) #2 |
| store i32 0, i32* %i, align 4, !tbaa !2 |
| br label %for.cond1 |
| |
| for.cond1: ; preds = %for.inc, %for.body |
| %5 = load i32, i32* %i, align 4, !tbaa !2 |
| %6 = load i32, i32* @n, align 4, !tbaa !2 |
| %cmp2 = icmp slt i32 %5, %6 |
| br i1 %cmp2, label %for.body4, label %for.cond.cleanup3 |
| |
| for.cond.cleanup3: ; preds = %for.cond1 |
| %7 = bitcast i32* %i to i8* |
| call addrspace(1) void @llvm.lifetime.end.p0i8(i64 4, i8* %7) #2 |
| br label %for.end |
| |
| for.body4: ; preds = %for.cond1 |
| %8 = load i32, i32* %i, align 4, !tbaa !2 |
| store volatile i32 %8, i32* @C, align 4, !tbaa !2 |
| br label %for.inc |
| |
| for.inc: ; preds = %for.body4 |
| %9 = load i32, i32* %i, align 4, !tbaa !2 |
| %inc5 = add nsw i32 %9, 1 |
| store i32 %inc5, i32* %i, align 4, !tbaa !2 |
| br label %for.cond1, !llvm.loop !6 |
| |
| for.end: ; preds = %for.cond.cleanup3 |
| br label %for.inc6 |
| |
| for.inc6: ; preds = %for.end |
| %10 = load i32, i32* %j, align 4, !tbaa !2 |
| %inc7 = add nsw i32 %10, 1 |
| store i32 %inc7, i32* %j, align 4, !tbaa !2 |
| br label %for.cond, !llvm.loop !8 |
| |
| for.end8: ; preds = %for.cond.cleanup |
| br label %do.cond |
| |
| do.cond: ; preds = %for.end8 |
| br i1 true, label %do.body, label %do.end, !llvm.loop !10 |
| |
| do.end: ; preds = %do.cond |
| ret void |
| } |
| |
| ; Function Attrs: argmemonly nofree nosync nounwind willreturn |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) addrspace(1) #1 |
| |
| ; Function Attrs: argmemonly nofree nosync nounwind willreturn |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) addrspace(1) #1 |
| |
| attributes #0 = { nounwind "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { argmemonly nofree nosync nounwind willreturn } |
| attributes #2 = { nounwind } |
| |
| !llvm.module.flags = !{!0} |
| !llvm.ident = !{!1} |
| |
| !0 = !{i32 1, !"wchar_size", i32 4} |
| !1 = !{!"clang)"} |
| !2 = !{!3, !3, i64 0, i64 4} |
| !3 = !{!4, i64 4, !"int"} |
| !4 = !{!5, i64 1, !"omnipotent char"} |
| !5 = !{!"Simple C++ TBAA"} |
| !6 = distinct !{!6, !7} |
| !7 = !{!"llvm.loop.mustprogress"} |
| !8 = distinct !{!8, !7, !9} |
| !9 = !{!"llvm.loop.unroll.disable"} |
| !10 = distinct !{!10, !11} |
| !11 = !{!"llvm.loop.unroll.count", i32 2} |
