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[LoopAccesses] Handle case when no memchecks are needed after partitioning

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233930 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adam Nemet
2015-04-02 17:51:57 +00:00
parent 2647380f59
commit e1aa33fb9a
1 changed files with 4 additions and 2 deletions
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6
lib/Analysis/LoopAccessAnalysis.cpp
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@@ -1211,9 +1211,8 @@ static Instruction *getFirstInst(Instruction *FirstInst, Value *V,
std::pair<Instruction *, Instruction *> LoopAccessInfo::addRuntimeCheck( std::pair<Instruction *, Instruction *> LoopAccessInfo::addRuntimeCheck(
Instruction *Loc, const SmallVectorImpl<int> *PtrPartition) const { Instruction *Loc, const SmallVectorImpl<int> *PtrPartition) const {
Instruction *tnullptr = nullptr;
if (!PtrRtCheck.Need) if (!PtrRtCheck.Need)
return std::pair<Instruction *, Instruction *>(tnullptr, tnullptr); return std::make_pair(nullptr, nullptr);
unsigned NumPointers = PtrRtCheck.Pointers.size(); unsigned NumPointers = PtrRtCheck.Pointers.size();
SmallVector<TrackingVH<Value> , 2> Starts; SmallVector<TrackingVH<Value> , 2> Starts;
@@ -1284,6 +1283,9 @@ std::pair<Instruction *, Instruction *> LoopAccessInfo::addRuntimeCheck(
} }
} }
if (!MemoryRuntimeCheck)
return std::make_pair(nullptr, nullptr);
// We have to do this trickery because the IRBuilder might fold the check to a // We have to do this trickery because the IRBuilder might fold the check to a
// constant expression in which case there is no Instruction anchored in a // constant expression in which case there is no Instruction anchored in a
// the block. // the block.