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c4adf5ea45
Add serialization support for function metadata attachments (added in
r235783). The syntax is:
define @foo() !attach !0 {
Metadata attachments are only allowed on functions with bodies. Since
they come before the `{`, they're not really part of the body; since
they require a body, they're not really part of the header. In
`LLParser` I gave them a separate function called from `ParseDefine()`,
`ParseOptionalFunctionMetadata()`.
In bitcode, I'm using the same `METADATA_ATTACHMENT` record used by
instructions. Instruction metadata attachments are included in a
special "attachment" block at the end of a `Function`. The attachment
records are laid out like this:
InstID (KindID MetadataID)+
Note that these records always have an odd number of fields. The new
code takes advantage of this to recognize function attachments (which
don't need an instruction ID):
(KindID MetadataID)+
This means we can use the same attachment block already used for
instructions.
This is part of PR23340.
llvm-svn: 235785
35 lines
816 B
LLVM
35 lines
816 B
LLVM
; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
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; RUN: verify-uselistorder %s
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; CHECK: @test
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; CHECK: ret void, !bar !1, !foo !0
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define void @test() {
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add i32 2, 1, !bar !0
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add i32 1, 2, !foo !1
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call void @llvm.dbg.func.start(metadata !"foo")
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extractvalue {{i32, i32}, i32} undef, 0, 1, !foo !0
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ret void, !foo !0, !bar !1
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}
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; CHECK: define void @test2() !foo !2 !baz !3
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define void @test2() !foo !2 !baz !3 {
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unreachable
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}
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; CHECK: define void @test3() !bar !3
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; CHECK: unreachable, !bar !4
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define void @test3() !bar !3 {
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unreachable, !bar !4
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}
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!0 = !MDLocation(line: 662302, column: 26, scope: !1)
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!1 = !MDSubprogram(name: "foo")
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!2 = distinct !{}
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!3 = distinct !{}
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!4 = distinct !{}
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declare void @llvm.dbg.func.start(metadata) nounwind readnone
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!foo = !{ !0 }
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!bar = !{ !1 }
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