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[APInt] Don't shift into the sign bit

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273727 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2016-06-24 21:15:36 +00:00
parent ab8ffadc13
commit 87d5e72f1d
1 changed files with 1 additions and 1 deletions
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2
lib/Support/APInt.cpp
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@ -880,7 +880,7 @@ double APInt::roundToDouble(bool isSigned) const {
// It is wrong to optimize getWord(0) to VAL; there might be more than one word.
if (isSingleWord() || getActiveBits() <= APINT_BITS_PER_WORD) {
if (isSigned) {
int64_t sext = (int64_t(getWord(0)) << (64-BitWidth)) >> (64-BitWidth);
int64_t sext = SignExtend64(getWord(0), BitWidth);
return double(sext);
} else
return double(getWord(0));