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[SCEV] Add interface for constructing generic SCEVComparePredicate [NFC}

This commit is contained in:
Philip Reames 2022-02-08 11:39:22 -08:00
parent b71eed7e8f
commit 83f895d952
2 changed files with 10 additions and 2 deletions
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2
llvm/include/llvm/Analysis/ScalarEvolution.h
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@ -1167,6 +1167,8 @@ public:
}
const SCEVPredicate *getEqualPredicate(const SCEV *LHS, const SCEV *RHS);
const SCEVPredicate *getComparePredicate(ICmpInst::Predicate Pred,
const SCEV *LHS, const SCEV *RHS);
const SCEVPredicate *
getWrapPredicate(const SCEVAddRecExpr *AR,

10
llvm/lib/Analysis/ScalarEvolution.cpp
View File

@ -13537,19 +13537,25 @@ void ScalarEvolutionWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
const SCEVPredicate *ScalarEvolution::getEqualPredicate(const SCEV *LHS,
const SCEV *RHS) {
return getComparePredicate(ICmpInst::ICMP_EQ, LHS, RHS);
}
const SCEVPredicate *
ScalarEvolution::getComparePredicate(const ICmpInst::Predicate Pred,
const SCEV *LHS, const SCEV *RHS) {
FoldingSetNodeID ID;
assert(LHS->getType() == RHS->getType() &&
"Type mismatch between LHS and RHS");
// Unique this node based on the arguments
ID.AddInteger(SCEVPredicate::P_Compare);
ID.AddInteger(ICmpInst::ICMP_EQ);
ID.AddInteger(Pred);
ID.AddPointer(LHS);
ID.AddPointer(RHS);
void *IP = nullptr;
if (const auto *S = UniquePreds.FindNodeOrInsertPos(ID, IP))
return S;
SCEVComparePredicate *Eq = new (SCEVAllocator)
SCEVComparePredicate(ID.Intern(SCEVAllocator), ICmpInst::ICMP_EQ, LHS, RHS);
SCEVComparePredicate(ID.Intern(SCEVAllocator), Pred, LHS, RHS);
UniquePreds.InsertNode(Eq, IP);
return Eq;
}