; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S -passes=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, ptr @C, align 4, !tbaa [[TBAA2:![0-9]+]] ; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[TMP0]], 1 ; CHECK-NEXT: call addrspace(1) void @llvm.lifetime.start.p0(i64 4, ptr [[J]]) #[[ATTR2:[0-9]+]] ; CHECK-NEXT: store i32 0, ptr [[J]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: br label [[FOR_COND:%.*]] ; CHECK: for.cond: ; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[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: call addrspace(1) void @llvm.lifetime.end.p0(i64 4, ptr [[J]]) #[[ATTR2]] ; CHECK-NEXT: br label [[DO_BODY]], !llvm.loop [[LOOP6:![0-9]+]] ; CHECK: for.body: ; CHECK-NEXT: store i32 undef, ptr [[I]], align 4 ; CHECK-NEXT: call addrspace(1) void @llvm.lifetime.start.p0(i64 4, ptr [[I]]) #[[ATTR2]] ; CHECK-NEXT: store i32 0, ptr [[I]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: br label [[FOR_COND1:%.*]] ; CHECK: for.cond1: ; CHECK-NEXT: [[TMP5:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr @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: call addrspace(1) void @llvm.lifetime.end.p0(i64 4, ptr [[I]]) #[[ATTR2]] ; CHECK-NEXT: [[TMP8:%.*]] = load i32, ptr [[J]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: [[INC7:%.*]] = add nsw i32 [[TMP8]], 1 ; CHECK-NEXT: store i32 [[INC7]], ptr [[J]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP8:![0-9]+]] ; CHECK: for.body4: ; CHECK-NEXT: [[TMP9:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: store volatile i32 [[TMP9]], ptr @C, align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: [[TMP10:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]] ; CHECK-NEXT: [[INC5:%.*]] = add nsw i32 [[TMP10]], 1 ; CHECK-NEXT: store i32 [[INC5]], ptr [[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, ptr @C, align 4, !tbaa !2 %inc = add nsw i32 %0, 1 call addrspace(1) void @llvm.lifetime.start.p0(i64 4, ptr %j) #2 store i32 0, ptr %j, align 4, !tbaa !2 br label %for.cond for.cond: ; preds = %for.inc6, %do.body %1 = load i32, ptr %j, align 4, !tbaa !2 %cmp = icmp slt i32 %1, 3 br i1 %cmp, label %for.body, label %for.cond.cleanup for.cond.cleanup: ; preds = %for.cond call addrspace(1) void @llvm.lifetime.end.p0(i64 4, ptr %j) #2 br label %for.end8 for.body: ; preds = %for.cond store i32 undef, ptr %i, align 4 call addrspace(1) void @llvm.lifetime.start.p0(i64 4, ptr %i) #2 store i32 0, ptr %i, align 4, !tbaa !2 br label %for.cond1 for.cond1: ; preds = %for.inc, %for.body %2 = load i32, ptr %i, align 4, !tbaa !2 %3 = load i32, ptr @n, align 4, !tbaa !2 %cmp2 = icmp slt i32 %2, %3 br i1 %cmp2, label %for.body4, label %for.cond.cleanup3 for.cond.cleanup3: ; preds = %for.cond1 call addrspace(1) void @llvm.lifetime.end.p0(i64 4, ptr %i) #2 br label %for.end for.body4: ; preds = %for.cond1 %4 = load i32, ptr %i, align 4, !tbaa !2 store volatile i32 %4, ptr @C, align 4, !tbaa !2 br label %for.inc for.inc: ; preds = %for.body4 %5 = load i32, ptr %i, align 4, !tbaa !2 %inc5 = add nsw i32 %5, 1 store i32 %inc5, ptr %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 %6 = load i32, ptr %j, align 4, !tbaa !2 %inc7 = add nsw i32 %6, 1 store i32 %inc7, ptr %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.p0(i64 immarg, ptr nocapture) addrspace(1) #1 ; Function Attrs: argmemonly nofree nosync nounwind willreturn declare void @llvm.lifetime.end.p0(i64 immarg, ptr 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}