forked from OSchip/llvm-project
53 lines
931 B
LLVM
53 lines
931 B
LLVM
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; RUN: opt -S -gvn-hoist < %s | FileCheck %s
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; Make sure the two stores @B do not get hoisted past the load @B.
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; CHECK-LABEL: define i8* @Foo
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; CHECK: store
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; CHECK: store
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; CHECK: load
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; CHECK: store
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@A = external global i8
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@B = external global i8*
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define i8* @Foo() {
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store i8 0, i8* @A
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br i1 undef, label %if.then, label %if.else
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if.then:
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store i8* null, i8** @B
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ret i8* null
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if.else:
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%1 = load i8*, i8** @B
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store i8* null, i8** @B
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ret i8* %1
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}
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; Make sure the two stores @B do not get hoisted past the store @GlobalVar.
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; CHECK-LABEL: define i8* @Fun
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; CHECK: store
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; CHECK: store
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; CHECK: store
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; CHECK: store
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; CHECK: load
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@GlobalVar = internal global i8 0
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define i8* @Fun() {
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store i8 0, i8* @A
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br i1 undef, label %if.then, label %if.else
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if.then:
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store i8* null, i8** @B
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ret i8* null
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if.else:
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store i8 0, i8* @GlobalVar
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store i8* null, i8** @B
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%1 = load i8*, i8** @B
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ret i8* %1
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}
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