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Fix APInt::operator*= so that it computes the correct result for large integers where there is unsigned overflow. Fix APFloat::toString so that it doesn't depend on the incorrect behavior in common cases (and computes the correct result in some rare cases). Fixes PR11086.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141441 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2011-10-07 23:40:49 +00:00
parent d2fdb4a285
commit 9eb6b4d91b
3 changed files with 12 additions and 2 deletions
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3
lib/Support/APInt.cpp
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@ -386,6 +386,7 @@ APInt& APInt::operator*=(const APInt& RHS) {
clearAllBits();
unsigned wordsToCopy = destWords >= getNumWords() ? getNumWords() : destWords;
memcpy(pVal, dest, wordsToCopy * APINT_WORD_SIZE);
clearUnusedBits();
// delete dest array and return
delete[] dest;
@ -471,7 +472,7 @@ APInt APInt::operator*(const APInt& RHS) const {
return APInt(BitWidth, VAL * RHS.VAL);
APInt Result(*this);
Result *= RHS;
return Result.clearUnusedBits();
return Result;
}
APInt APInt::operator+(const APInt& RHS) const {