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Print IV chain numbers while collecting them.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155567 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-04-25 18:01:32 +00:00
parent a0b0219a9e
commit 165324cd7d
1 changed files with 5 additions and 4 deletions
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9
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -2487,12 +2487,12 @@ void LSRInstance::ChainInstruction(Instruction *UserInst, Instruction *IVOper,
++NChains;
IVChainVec.resize(NChains);
ChainUsersVec.resize(NChains);
DEBUG(dbgs() << "IV Head: (" << *UserInst << ") IV=" << *LastIncExpr
<< "\n");
DEBUG(dbgs() << "IV Chain#" << ChainIdx << " Head: (" << *UserInst
<< ") IV=" << *LastIncExpr << "\n");
}
else
DEBUG(dbgs() << "IV Inc: (" << *UserInst << ") IV+" << *LastIncExpr
<< "\n");
DEBUG(dbgs() << "IV Chain#" << ChainIdx << " Inc: (" << *UserInst
<< ") IV+" << *LastIncExpr << "\n");
// Add this IV user to the end of the chain.
IVChainVec[ChainIdx].push_back(IVInc(UserInst, IVOper, LastIncExpr));
@ -2551,6 +2551,7 @@ void LSRInstance::ChainInstruction(Instruction *UserInst, Instruction *IVOper,
/// loop latch. This will discover chains on side paths, but requires
/// maintaining multiple copies of the Chains state.
void LSRInstance::CollectChains() {
DEBUG(dbgs() << "Collecting IV Chains.\n");
SmallVector<ChainUsers, 8> ChainUsersVec;
SmallVector<BasicBlock *,8> LatchPath;