diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopIndexSplit.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopIndexSplit.cpp | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/lib/Transforms/Scalar/LoopIndexSplit.cpp b/lib/Transforms/Scalar/LoopIndexSplit.cpp index 9b4319d40c..4a5c1c8cc0 100644 --- a/lib/Transforms/Scalar/LoopIndexSplit.cpp +++ b/lib/Transforms/Scalar/LoopIndexSplit.cpp @@ -178,7 +178,7 @@ bool LoopIndexSplit::runOnLoop(Loop *IncomingLoop, LPPassManager &LPM_Ref) { // First see if it is possible to eliminate loop itself or not. for (SmallVector<SplitInfo, 4>::iterator SI = SplitData.begin(), - E = SplitData.end(); SI != E; ++SI) { + E = SplitData.end(); SI != E;) { SplitInfo &SD = *SI; if (SD.SplitCondition->getPredicate() == ICmpInst::ICMP_EQ) { Changed = processOneIterationLoop(SD); @@ -186,8 +186,13 @@ bool LoopIndexSplit::runOnLoop(Loop *IncomingLoop, LPPassManager &LPM_Ref) { ++NumIndexSplit; // If is loop is eliminated then nothing else to do here. return Changed; + } else { + SmallVector<SplitInfo, 4>::iterator Delete_SI = SI; + ++SI; + SplitData.erase(Delete_SI); } - } + } else + ++SI; } unsigned MaxCost = 99; @@ -198,8 +203,8 @@ bool LoopIndexSplit::runOnLoop(Loop *IncomingLoop, LPPassManager &LPM_Ref) { SplitInfo SD = *SI; // ICM_EQs are already handled above. - if (SD.SplitCondition->getPredicate() == ICmpInst::ICMP_EQ) - continue; + assert (SD.SplitCondition->getPredicate() != ICmpInst::ICMP_EQ && + "Unexpected split condition predicate"); unsigned Cost = findSplitCost(L, SD); if (Cost < MaxCost) @@ -207,7 +212,8 @@ bool LoopIndexSplit::runOnLoop(Loop *IncomingLoop, LPPassManager &LPM_Ref) { } // Split most profitiable condition. - Changed = splitLoop(SplitData[MostProfitableSDIndex]); + if (!SplitData.empty()) + Changed = splitLoop(SplitData[MostProfitableSDIndex]); if (Changed) ++NumIndexSplit; |