llvm-mirror/test/Linker/2009-09-03-mdnode.ll
Duncan P. N. Exon Smith 0c1aee0b16 DI: Require subprogram definitions to be distinct
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
2015-08-28 20:26:49 +00:00

32 lines
1.2 KiB
LLVM

; RUN: llvm-as < %s > %t.bc
; RUN: llvm-as < %p/2009-09-03-mdnode2.ll > %t2.bc
; RUN: llvm-link %t.bc %t2.bc
declare void @f() nounwind
define i32 @main(...) nounwind {
entry:
%retval = alloca i32 ; <i32*> [#uses=2]
call void @llvm.dbg.func.start(metadata !0)
store i32 0, i32* %retval
call void @llvm.dbg.stoppoint(i32 4, i32 5, metadata !1)
call void @f()
br label %return
return: ; preds = %entry
%0 = load i32, i32* %retval ; <i32> [#uses=1]
call void @llvm.dbg.stoppoint(i32 5, i32 1, metadata !1)
call void @llvm.dbg.region.end(metadata !0)
ret i32 %0
}
declare void @llvm.dbg.func.start(metadata) nounwind readnone
declare void @llvm.dbg.stoppoint(i32, i32, metadata) nounwind readnone
declare void @llvm.dbg.region.end(metadata) nounwind readnone
!0 = distinct !DISubprogram(name: "main", linkageName: "main", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scope: !1)
!1 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "ellcc 0.1.0", isOptimized: true, emissionKind: 0, file: !2)
!2 = !DIFile(filename: "a.c", directory: "/home/rich/ellcc/test/source")