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DebugInfo: Don't crash if 'Debug Info Version' has a strange value

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229356 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2015-02-16 06:04:53 +00:00
parent 2b022d53a3
commit 3f58e9b36a
2 changed files with 6 additions and 1 deletions
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2
lib/IR/DebugInfo.cpp
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@ -1537,7 +1537,7 @@ bool llvm::StripDebugInfo(Module &M) {
} }
unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) { unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
if (auto *Val = mdconst::extract_or_null<ConstantInt>( if (auto *Val = mdconst::dyn_extract_or_null<ConstantInt>(
M.getModuleFlag("Debug Info Version"))) M.getModuleFlag("Debug Info Version")))
return Val->getZExtValue(); return Val->getZExtValue();
return 0; return 0;

5
test/Assembler/invalid-debug-info-version.ll Normal file
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@ -0,0 +1,5 @@
; RUN: opt < %s -S | FileCheck %s
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"Debug Info Version", !""}
; CHECK: !{i32 1, !"Debug Info Version", !""}