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avoid iterator invalidation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36002 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-04-14 18:06:52 +00:00
parent 70718366d9
commit ae143ceb83
1 changed files with 4 additions and 2 deletions
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6
lib/Transforms/IPO/ConstantMerge.cpp
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@ -60,8 +60,10 @@ bool ConstantMerge::runOnModule(Module &M) {
// because doing so may cause initializers of other globals to be rewritten,
// invalidating the Constant* pointers in CMap.
//
for (Module::global_iterator GV = M.global_begin(), E = M.global_end();
GV != E; ++GV) {
for (Module::global_iterator GVI = M.global_begin(), E = M.global_end();
GVI != E; ) {
GlobalVariable *GV = GVI++;
// If this GV is dead, remove it.
GV->removeDeadConstantUsers();
if (GV->use_empty() && GV->hasInternalLinkage()) {