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[InstCombine] use m_OneUse to reduce code; NFCI

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llvm-svn: 303090
This commit is contained in:
Sanjay Patel
2017-05-15 18:08:17 +00:00
parent 0a2678e9aa
commit 941e8dfcbf
1 changed files with 7 additions and 6 deletions
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13
llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
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@@ -2212,9 +2212,9 @@ Instruction *InstCombiner::visitBranchInst(BranchInst &BI) {
// Canonicalize fcmp_one -> fcmp_oeq
FCmpInst::Predicate FPred; Value *Y;
if (match(&BI, m_Br(m_FCmp(FPred, m_Value(X), m_Value(Y)),
TrueDest, FalseDest)) &&
BI.getCondition()->hasOneUse())
if (match(&BI, m_Br(m_OneUse(m_FCmp(FPred, m_Value(X), m_Value(Y))),
TrueDest, FalseDest))) {
// TODO: Why are we only transforming these 3 predicates?
if (FPred == FCmpInst::FCMP_ONE || FPred == FCmpInst::FCMP_OLE ||
FPred == FCmpInst::FCMP_OGE) {
FCmpInst *Cond = cast<FCmpInst>(BI.getCondition());
@@ -2225,12 +2225,12 @@ Instruction *InstCombiner::visitBranchInst(BranchInst &BI) {
Worklist.Add(Cond);
return &BI;
}
}
// Canonicalize icmp_ne -> icmp_eq
ICmpInst::Predicate IPred;
if (match(&BI, m_Br(m_ICmp(IPred, m_Value(X), m_Value(Y)),
TrueDest, FalseDest)) &&
BI.getCondition()->hasOneUse())
if (match(&BI, m_Br(m_OneUse(m_ICmp(IPred, m_Value(X), m_Value(Y))),
TrueDest, FalseDest))) {
if (IPred == ICmpInst::ICMP_NE || IPred == ICmpInst::ICMP_ULE ||
IPred == ICmpInst::ICMP_SLE || IPred == ICmpInst::ICMP_UGE ||
IPred == ICmpInst::ICMP_SGE) {
@@ -2241,6 +2241,7 @@ Instruction *InstCombiner::visitBranchInst(BranchInst &BI) {
Worklist.Add(Cond);
return &BI;
}
}
return nullptr;
}