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0c1aee0b16
As a follow-up to r246098, require `DISubprogram` definitions
(`isDefinition: true`) to be 'distinct'. Specifically, add an assembler
check, a verifier check, and bitcode upgrading logic to combat testcase
bitrot after the `DIBuilder` change.
While working on the testcases, I realized that
test/Linker/subprogram-linkonce-weak-odr.ll isn't relevant anymore. Its
purpose was to check for a corner case in PR22792 where two subprogram
definitions match exactly and share the same metadata node. The new
verifier check, requiring that subprogram definitions are 'distinct',
precludes that possibility.
I updated almost all the IR with the following script:
git grep -l -E -e '= !DISubprogram\(.* isDefinition: true' |
grep -v test/Bitcode |
xargs sed -i '' -e 's/= \(!DISubprogram(.*, isDefinition: true\)/= distinct \1/'
Likely some variant of would work for out-of-tree testcases.
llvm-svn: 246327
27 lines
1.1 KiB
LLVM
27 lines
1.1 KiB
LLVM
; This file is used by 2009-09-03-mdnode.ll, so it doesn't actually do anything itself
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;
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; RUN: true
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define i32 @f(...) nounwind {
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entry:
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%retval = alloca i32 ; <i32*> [#uses=1]
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call void @llvm.dbg.func.start(metadata !0)
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br label %return
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return: ; preds = %entry
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%0 = load i32, i32* %retval ; <i32> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 3, i32 1, metadata !1)
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call void @llvm.dbg.region.end(metadata !0)
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ret i32 %0
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}
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declare void @llvm.dbg.func.start(metadata) nounwind readnone
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declare void @llvm.dbg.stoppoint(i32, i32, metadata) nounwind readnone
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declare void @llvm.dbg.region.end(metadata) nounwind readnone
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!0 = distinct !DISubprogram(name: "f", linkageName: "f", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scope: !1)
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!1 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "ellcc 0.1.0", isOptimized: true, emissionKind: 0, file: !2)
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!2 = !DIFile(filename: "b.c", directory: "/home/rich/ellcc/test/source")
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