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Revert 91280-91283, 91286-91289, 91291, 91293, 91295-91296. It apparently introduced a non-deterministic behavior in the optimizer somewhere.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91598 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-12-17 09:39:49 +00:00
parent 90b5d04772
commit 04149f7ffd
6 changed files with 113 additions and 43 deletions
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16
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -48,7 +48,7 @@ namespace {
/// TLI - Keep a pointer of a TargetLowering to consult for determining
/// transformation profitability.
const TargetLowering *TLI;
ProfileInfo *PI;
ProfileInfo *PFI;
/// BackEdges - Keep a set of all the loop back edges.
///
@ -99,7 +99,7 @@ void CodeGenPrepare::findLoopBackEdges(const Function &F) {
bool CodeGenPrepare::runOnFunction(Function &F) {
bool EverMadeChange = false;
PI = getAnalysisIfAvailable<ProfileInfo>();
PFI = getAnalysisIfAvailable<ProfileInfo>();
// First pass, eliminate blocks that contain only PHI nodes and an
// unconditional branch.
EverMadeChange |= EliminateMostlyEmptyBlocks(F);
@ -288,9 +288,9 @@ void CodeGenPrepare::EliminateMostlyEmptyBlock(BasicBlock *BB) {
// The PHIs are now updated, change everything that refers to BB to use
// DestBB and remove BB.
BB->replaceAllUsesWith(DestBB);
if (PI) {
PI->replaceAllUses(BB, DestBB);
PI->removeEdge(ProfileInfo::getEdge(BB, DestBB));
if (PFI) {
PFI->replaceAllUses(BB, DestBB);
PFI->removeEdge(ProfileInfo::getEdge(BB, DestBB));
}
BB->eraseFromParent();
@ -368,9 +368,9 @@ static void SplitEdgeNicely(TerminatorInst *TI, unsigned SuccNum,
// If we found a workable predecessor, change TI to branch to Succ.
if (FoundMatch) {
ProfileInfo *PI = P->getAnalysisIfAvailable<ProfileInfo>();
if (PI)
PI->splitEdge(TIBB, Dest, Pred);
ProfileInfo *PFI = P->getAnalysisIfAvailable<ProfileInfo>();
if (PFI)
PFI->splitEdge(TIBB, Dest, Pred);
Dest->removePredecessor(TIBB);
TI->setSuccessor(SuccNum, Pred);
return;