diff options
Diffstat (limited to 'lib/Support/APInt.cpp')
| -rw-r--r-- | lib/Support/APInt.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp index 9b000da0ee..36f88a2479 100644 --- a/lib/Support/APInt.cpp +++ b/lib/Support/APInt.cpp @@ -938,7 +938,10 @@ APInt &APInt::sext(uint32_t width) { if (wordsBefore == wordsAfter) { uint32_t newWordBits = width % APINT_BITS_PER_WORD; // The extension is contained to the wordsBefore-1th word. - uint64_t mask = (~0ULL >> (APINT_BITS_PER_WORD - newWordBits)) << wordBits; + uint64_t mask = ~0ULL; + if (newWordBits) + mask >>= APINT_BITS_PER_WORD - newWordBits; + mask <<= wordBits; if (wordsBefore == 1) VAL |= mask; else |