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[InstCombine] simplify isFMulOrFDivWithConstant(); NFCI

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llvm-svn: 325142
This commit is contained in:
Sanjay Patel 2018-02-14 17:16:33 +00:00
parent 2b94e8c2c3
commit 5547176d2d
1 changed files with 7 additions and 15 deletions
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22
lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
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@ -507,22 +507,14 @@ static bool isNormalFp(Constant *C) {
return isa<ConstantFP>(C) && cast<ConstantFP>(C)->getValueAPF().isNormal();
}
/// Helper function of InstCombiner::visitFMul(BinaryOperator(). It returns
/// true iff the given value is FMul or FDiv with one and only one operand
/// being a normal constant (i.e. not Zero/NaN/Infinity).
/// Helper function of InstCombiner::visitFMul(). Return true iff the given
/// value is FMul or FDiv with one and only one operand being a finite-non-zero
/// constant (i.e. not Zero/NaN/Infinity).
static bool isFMulOrFDivWithConstant(Value *V) {
Instruction *I = dyn_cast<Instruction>(V);
if (!I || (I->getOpcode() != Instruction::FMul &&
I->getOpcode() != Instruction::FDiv))
return false;
Constant *C0 = dyn_cast<Constant>(I->getOperand(0));
Constant *C1 = dyn_cast<Constant>(I->getOperand(1));
if (C0 && C1)
return false;
return (C0 && isFiniteNonZeroFp(C0)) || (C1 && isFiniteNonZeroFp(C1));
Constant *C;
return (match(V, m_FMul(m_Value(), m_Constant(C))) ||
match(V, m_FDiv(m_Value(), m_Constant(C))) ||
match(V, m_FDiv(m_Constant(C), m_Value()))) && isFiniteNonZeroFp(C);
}
/// foldFMulConst() is a helper routine of InstCombiner::visitFMul().