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More LLVMContext-ification.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74807 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-07-05 22:41:43 +00:00
parent db882950f3
commit 0a205a4598
26 changed files with 162 additions and 98 deletions
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8
lib/Transforms/Utils/Local.cpp
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@ -20,6 +20,7 @@
#include "llvm/Instructions.h"
#include "llvm/Intrinsics.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/LLVMContext.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/DebugInfo.h"
@ -262,7 +263,8 @@ void llvm::RecursivelyDeleteTriviallyDeadInstructions(Value *V) {
/// too, recursively.
void
llvm::RecursivelyDeleteDeadPHINode(PHINode *PN) {
LLVMContext* Context = PN->getParent()->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.
@ -279,7 +281,7 @@ 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(UndefValue::get(JP->getType()));
JP->replaceAllUsesWith(Context->getUndef(JP->getType()));
RecursivelyDeleteTriviallyDeadInstructions(JP);
break;
}
@ -299,7 +301,7 @@ 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 = UndefValue::get(PN->getType());
if (NewVal == PN) NewVal = DestBB->getContext()->getUndef(PN->getType());
PN->replaceAllUsesWith(NewVal);
PN->eraseFromParent();
}