derek.holloway
7502bf64a4
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30 lines
641 B
LLVM
30 lines
641 B
LLVM
; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; Test that a lifetime intrinsic isn't removed because that would change semantics
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; CHECK: foo
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; CHECK: entry:
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; CHECK: bb0:
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; CHECK: bb1:
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; CHECK: ret
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define void @foo(i1 %x) {
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entry:
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%a = alloca i8
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call void @llvm.lifetime.start.p0(ptr %a) nounwind
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br i1 %x, label %bb0, label %bb1
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bb0:
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call void @llvm.lifetime.end.p0(ptr %a) nounwind
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br label %bb1
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bb1:
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call void @f()
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ret void
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}
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declare void @f()
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declare void @llvm.lifetime.start.p0(ptr nocapture) nounwind
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declare void @llvm.lifetime.end.p0(ptr nocapture) nounwind
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