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Fix bug: ConstantMerge/2003-10-28-MergeExternalConstants.ll & PR64

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9579 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-10-29 06:01:26 +00:00
parent 851e07490c
commit 6ace4daa57
1 changed files with 13 additions and 2 deletions
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15
lib/Transforms/IPO/ConstantMerge.cpp
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@ -52,14 +52,25 @@ bool ConstantMerge::run(Module &M) {
if (I == CMap.end()) { // Nope, add it to the map
CMap.insert(I, std::make_pair(Init, GV));
} else { // Yup, this is a duplicate!
} else if (GV->hasInternalLinkage()) { // Yup, this is a duplicate!
// Make all uses of the duplicate constant use the canonical version...
GV->replaceAllUsesWith(I->second);
// Delete the global value from the module... and back up iterator to
// not skip the next global...
GV = --M.getGlobalList().erase(GV);
++NumMerged;
MadeChanges = true;
} else if (I->second->hasInternalLinkage()) {
// Make all uses of the duplicate constant use the canonical version...
I->second->replaceAllUsesWith(GV);
// Delete the global value from the module... and back up iterator to
// not skip the next global...
M.getGlobalList().erase(I->second);
I->second = GV;
++NumMerged;
MadeChanges = true;
}