Only delete instructions once.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138700 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-08-27 06:10:02 +00:00
parent 234e43a888
commit 884fb72f15

View File

@ -389,7 +389,7 @@ void llvm::UpgradeExceptionHandling(Module *M) {
// This map stores the slots where the exception object and selector value are
// stored within a function.
SmallVector<Instruction*, 32> DeadInsts;
SmallPtrSet<Instruction*, 32> DeadInsts;
DenseMap<Function*, std::pair<Value*, Value*> > FnToLPadSlotMap;
for (Module::iterator
I = M->begin(), E = M->end(); I != E; ++I) {
@ -439,14 +439,15 @@ void llvm::UpgradeExceptionHandling(Module *M) {
Exn->replaceAllUsesWith(LPExn);
Sel->replaceAllUsesWith(LPSel);
DeadInsts.push_back(Exn);
DeadInsts.push_back(Sel);
DeadInsts.insert(Exn);
DeadInsts.insert(Sel);
}
}
// Remove the dead instructions.
while (!DeadInsts.empty()) {
Instruction *Inst = DeadInsts.pop_back_val();
for (SmallPtrSet<Instruction*, 32>::iterator
I = DeadInsts.begin(), E = DeadInsts.end(); I != E; ++I) {
Instruction *Inst = *I;
Inst->eraseFromParent();
}