Print IV chain numbers while collecting them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155567 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index fe4700b..803feb4 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -2487,12 +2487,12 @@
++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 @@
/// 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;