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Only delete instructions once.

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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
1 changed files with 6 additions and 5 deletions
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11
lib/VMCore/AutoUpgrade.cpp
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@ -389,7 +389,7 @@ void llvm::UpgradeExceptionHandling(Module *M) {
// This map stores the slots where the exception object and selector value are // This map stores the slots where the exception object and selector value are
// stored within a function. // stored within a function.
SmallVector<Instruction*, 32> DeadInsts; SmallPtrSet<Instruction*, 32> DeadInsts;
DenseMap<Function*, std::pair<Value*, Value*> > FnToLPadSlotMap; DenseMap<Function*, std::pair<Value*, Value*> > FnToLPadSlotMap;
for (Module::iterator for (Module::iterator
I = M->begin(), E = M->end(); I != E; ++I) { I = M->begin(), E = M->end(); I != E; ++I) {
@ -439,14 +439,15 @@ void llvm::UpgradeExceptionHandling(Module *M) {
Exn->replaceAllUsesWith(LPExn); Exn->replaceAllUsesWith(LPExn);
Sel->replaceAllUsesWith(LPSel); Sel->replaceAllUsesWith(LPSel);
DeadInsts.push_back(Exn); DeadInsts.insert(Exn);
DeadInsts.push_back(Sel); DeadInsts.insert(Sel);
} }
} }
// Remove the dead instructions. // Remove the dead instructions.
while (!DeadInsts.empty()) { for (SmallPtrSet<Instruction*, 32>::iterator
Instruction *Inst = DeadInsts.pop_back_val(); I = DeadInsts.begin(), E = DeadInsts.end(); I != E; ++I) {
Instruction *Inst = *I;
Inst->eraseFromParent(); Inst->eraseFromParent();
} }