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Preserve ProfileInfo during CodeGenPrepare.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82034 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andreas Neustifter
2009-09-16 09:26:52 +00:00
parent dc62ea0f1c
commit ad80981a10
3 changed files with 25 additions and 3 deletions
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10
lib/Transforms/Utils/Local.cpp
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@ -24,6 +24,7 @@
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
@ -294,7 +295,7 @@ llvm::RecursivelyDeleteDeadPHINode(PHINode *PN) {
/// between them, moving the instructions in the predecessor into DestBB and
/// deleting the predecessor block.
///
void llvm::MergeBasicBlockIntoOnlyPred(BasicBlock *DestBB) {
void llvm::MergeBasicBlockIntoOnlyPred(BasicBlock *DestBB, Pass *P) {
// If BB has single-entry PHI nodes, fold them.
while (PHINode *PN = dyn_cast<PHINode>(DestBB->begin())) {
Value *NewVal = PN->getIncomingValue(0);
@ -314,6 +315,13 @@ void llvm::MergeBasicBlockIntoOnlyPred(BasicBlock *DestBB) {
// Anything that branched to PredBB now branches to DestBB.
PredBB->replaceAllUsesWith(DestBB);
if (P) {
ProfileInfo *PI = P->getAnalysisIfAvailable<ProfileInfo>();
if (PI) {
PI->replaceAllUses(PredBB, DestBB);
PI->removeEdge(ProfileInfo::getEdge(PredBB, DestBB));
}
}
// Nuke BB.
PredBB->eraseFromParent();
}