33 lines
1.0 KiB
LLVM
33 lines
1.0 KiB
LLVM
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; RUN: opt -S -globalopt < %s | FileCheck %s
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; PR6112 - When globalopt does RAUW(@G, %G), the metadata reference should drop
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; to null. Function local metadata that references @G from a different function
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; to that containing %G should likewise drop to null.
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@G = internal global i8** null
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define i32 @main(i32 %argc, i8** %argv) norecurse {
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; CHECK-LABEL: @main(
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; CHECK: %G = alloca
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store i8** %argv, i8*** @G
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ret i32 0
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}
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define void @foo(i32 %x) {
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; Note: these arguments look like MDNodes, but they're really syntactic sugar
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; for 'MetadataAsValue::get(ValueAsMetadata::get(Value*))'. When @G drops to
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; null, the ValueAsMetadata instance gets replaced by metadata !{}, or
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; MDNode::get({}).
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call void @llvm.foo(metadata i8*** @G, metadata i32 %x)
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; CHECK: call void @llvm.foo(metadata ![[EMPTY:[0-9]+]], metadata i32 %x)
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ret void
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}
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declare void @llvm.foo(metadata, metadata) nounwind readnone
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!named = !{!0}
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; CHECK: !named = !{![[NULL:[0-9]+]]}
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!0 = !{i8*** @G}
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; CHECK-DAG: ![[NULL]] = distinct !{null}
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; CHECK-DAG: ![[EMPTY]] = !{}
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