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[IRVerifier] Don't crash on invalid DIFile inside DISubprogram.

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r265515, this time with the correct fix. file inside DISubprogram is not
mandatory.

llvm-svn: 265586
This commit is contained in:
Davide Italiano 2016-04-06 18:46:39 +00:00
parent 72002fa65e
commit 795a96eff5
2 changed files with 12 additions and 0 deletions
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2
lib/IR/Verifier.cpp
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@ -988,6 +988,8 @@ void Verifier::visitDICompileUnit(const DICompileUnit &N) {
void Verifier::visitDISubprogram(const DISubprogram &N) {
Assert(N.getTag() == dwarf::DW_TAG_subprogram, "invalid tag", &N);
Assert(isScopeRef(N, N.getRawScope()), "invalid scope", &N, N.getRawScope());
if (auto *F = N.getRawFile())
Assert(isa<DIFile>(F), "invalid file", &N, F);
if (auto *T = N.getRawType())
Assert(isa<DISubroutineType>(T), "invalid subroutine type", &N, T);
Assert(isTypeRef(N, N.getRawContainingType()), "invalid containing type", &N,

10
test/Verifier/dbg-difile-crash.ll Normal file
View File

@ -0,0 +1,10 @@
; RUN: not llvm-as -disable-output <%s 2>&1 | FileCheck %s
; CHECK: assembly parsed, but does not verify
; CHECK-NEXT: invalid file
!llvm.module.flags = !{!0}
!0 = !{i32 2, !"Debug Info Version", i32 3}
!llvm.dbg.cu = !{!1}
!1 = distinct !DICompileUnit(file: !2, language: DW_LANG_C99, subprograms: !{!3})
!2 = !DIFile(filename: "file.c", directory: "/path/to/dir")
!3 = distinct !DISubprogram(name: "blah", file: !1)