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[APInt] Remove an unneeded extra temporary APInt from toString.

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Turns out udivrem can write its output to the same location as one of its inputs so the extra temporary isn't needed.

llvm-svn: 302772
This commit is contained in:
Craig Topper 2017-05-11 07:10:43 +00:00
parent 584e78cfa3
commit c1ef9481dc
1 changed files with 1 additions and 5 deletions
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6
lib/Support/APInt.cpp
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@ -1953,15 +1953,11 @@ void APInt::toString(SmallVectorImpl<char> &Str, unsigned Radix,
} else {
APInt divisor(Tmp.getBitWidth(), Radix);
APInt APdigit;
APInt tmp2(Tmp.getBitWidth(), 0);
while (Tmp.getBoolValue()) {
udivrem(Tmp, divisor, tmp2, APdigit);
udivrem(Tmp, divisor, Tmp, APdigit);
unsigned Digit = (unsigned)APdigit.getZExtValue();
assert(Digit < Radix && "divide failed");
Str.push_back(Digits[Digit]);
// Move the quotient into Tmp and move the old allocation of Tmp into
// tmp2 to be used on the next loop iteration.
std::swap(Tmp, tmp2);
}
}