; 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: [[TMP1:%.*]] = load i32, ptr [[J]], align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[TMP1]], 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: [[TMP2:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr @n, align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[TMP2]], [[TMP3]]
; 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: [[TMP4:%.*]] = load i32, ptr [[J]], align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: [[INC7:%.*]] = add nsw i32 [[TMP4]], 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: [[TMP5:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: store volatile i32 [[TMP5]], ptr @C, align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[I]], align 4, !tbaa [[TBAA2]]
; CHECK-NEXT: [[INC5:%.*]] = add nsw i32 [[TMP6]], 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}
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