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LTO: Assert visibility of local linkage when merging symbols

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`ModuleLinker::getLinkageResult()` shouldn't create symbols with local
linkage and non-default visibility -- in fact, symbols with local
linkage shouldn't be merged at all.  Assert to that effect.

llvm-svn: 208262
This commit is contained in:
Duncan P. N. Exon Smith 2014-05-07 22:55:46 +00:00
parent 9739ca9e59
commit bba2550124
1 changed files with 2 additions and 0 deletions
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lib/Linker/LinkModules.cpp
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@ -604,6 +604,8 @@ bool ModuleLinker::getLinkageResult(GlobalValue *Dest, const GlobalValue *Src,
// Compute the visibility. We follow the rules in the System V Application
// Binary Interface.
assert(!GlobalValue::isLocalLinkage(LT) &&
"Symbols with local linkage should not be merged");
Vis = isLessConstraining(Src->getVisibility(), Dest->getVisibility()) ?
Dest->getVisibility() : Src->getVisibility();
return false;