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[APInt] Remove unnecessary checks of rhsWords==1 with lhsWords==1 from udiv and udivrem. NFC

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At this point in the code rhsWords is guaranteed to be non-zero and less than or equal to lhsWords. So if lhsWords is 1, rhsWords must also be 1. urem alread had the check removed so this makes all 3 consistent.

llvm-svn: 302930
This commit is contained in:
Craig Topper 2017-05-12 18:18:57 +00:00
parent 31c4d52ea9
commit 043b32ee18
1 changed files with 2 additions and 2 deletions
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4
lib/Support/APInt.cpp
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@ -1579,7 +1579,7 @@ APInt APInt::udiv(const APInt& RHS) const {
if (*this == RHS)
// X / X ===> 1
return APInt(BitWidth, 1);
if (lhsWords == 1 && rhsWords == 1)
if (lhsWords == 1) // rhsWords is 1 if lhsWords is 1.
// All high words are zero, just use native divide
return APInt(BitWidth, this->U.pVal[0] / RHS.U.pVal[0]);
@ -1682,7 +1682,7 @@ void APInt::udivrem(const APInt &LHS, const APInt &RHS,
return;
}
if (lhsWords == 1 && rhsWords == 1) {
if (lhsWords == 1) { // rhsWords is 1 if lhsWords is 1.
// There is only one word to consider so use the native versions.
uint64_t lhsValue = LHS.U.pVal[0];
uint64_t rhsValue = RHS.U.pVal[0];