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avoid iterator invalidation. 

llvm-svn: 36002
This commit is contained in:
Chris Lattner 2007-04-14 18:06:52 +00:00
parent 64f7a5ea86
commit 6f58839b20
1 changed files with 4 additions and 2 deletions
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6
llvm/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, // because doing so may cause initializers of other globals to be rewritten,
// invalidating the Constant* pointers in CMap. // invalidating the Constant* pointers in CMap.
// //
for (Module::global_iterator GV = M.global_begin(), E = M.global_end(); for (Module::global_iterator GVI = M.global_begin(), E = M.global_end();
GV != E; ++GV) { GVI != E; ) {
GlobalVariable *GV = GVI++;
// If this GV is dead, remove it. // If this GV is dead, remove it.
GV->removeDeadConstantUsers(); GV->removeDeadConstantUsers();
if (GV->use_empty() && GV->hasInternalLinkage()) { if (GV->use_empty() && GV->hasInternalLinkage()) {