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Move more code back to 2.5 APIs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77635 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-07-30 23:03:37 +00:00
parent 124e6eb09d
commit 9e9a0d5fc2
47 changed files with 188 additions and 236 deletions
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6
lib/Transforms/Utils/Local.cpp
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@ -263,8 +263,6 @@ void llvm::RecursivelyDeleteTriviallyDeadInstructions(Value *V) {
/// too, recursively.
void
llvm::RecursivelyDeleteDeadPHINode(PHINode *PN) {
LLVMContext &Context = PN->getContext();
// We can remove a PHI if it is on a cycle in the def-use graph
// where each node in the cycle has degree one, i.e. only one use,
// and is an instruction with no side effects.
@ -281,7 +279,7 @@ llvm::RecursivelyDeleteDeadPHINode(PHINode *PN) {
if (PHINode *JP = dyn_cast<PHINode>(J))
if (!PHIs.insert(cast<PHINode>(JP))) {
// Break the cycle and delete the PHI and its operands.
JP->replaceAllUsesWith(Context.getUndef(JP->getType()));
JP->replaceAllUsesWith(UndefValue::get(JP->getType()));
RecursivelyDeleteTriviallyDeadInstructions(JP);
break;
}
@ -301,7 +299,7 @@ void llvm::MergeBasicBlockIntoOnlyPred(BasicBlock *DestBB) {
while (PHINode *PN = dyn_cast<PHINode>(DestBB->begin())) {
Value *NewVal = PN->getIncomingValue(0);
// Replace self referencing PHI with undef, it must be dead.
if (NewVal == PN) NewVal = DestBB->getContext().getUndef(PN->getType());
if (NewVal == PN) NewVal = UndefValue::get(PN->getType());
PN->replaceAllUsesWith(NewVal);
PN->eraseFromParent();
}