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ReplaceUsesOfBlockWith() can modify the predecessors list.

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llvm-svn: 37441
This commit is contained in:
Evan Cheng 2007-06-05 22:03:53 +00:00
parent f2a2a5a025
commit acf719bf83
1 changed files with 4 additions and 3 deletions
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7
lib/CodeGen/IfConversion.cpp
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@ -756,9 +756,10 @@ void IfConverter::MergeBlocks(BBInfo &ToBBI, BBInfo &FromBBI) {
ToBBI.BB->removeSuccessor(FromBBI.BB);
// Redirect all branches to FromBB to ToBB.
for (MachineBasicBlock::pred_iterator I = FromBBI.BB->pred_begin(),
E = FromBBI.BB->pred_end(); I != E; ++I)
(*I)->ReplaceUsesOfBlockWith(FromBBI.BB, ToBBI.BB);
std::vector<MachineBasicBlock *> Preds(FromBBI.BB->pred_begin(),
FromBBI.BB->pred_end());
for (unsigned i = 0, e = Preds.size(); i != e; ++i)
Preds[i]->ReplaceUsesOfBlockWith(FromBBI.BB, ToBBI.BB);
// Transfer preds / succs and update size.
TransferPreds(ToBBI.BB, FromBBI.BB);