diff options
| -rw-r--r-- | llvm/include/llvm/ADT/APInt.h | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/llvm/include/llvm/ADT/APInt.h b/llvm/include/llvm/ADT/APInt.h index c697402341f..4b966faa6c1 100644 --- a/llvm/include/llvm/ADT/APInt.h +++ b/llvm/include/llvm/ADT/APInt.h @@ -138,15 +138,10 @@ private: /// zero'd out. APInt &clearUnusedBits() { // Compute how many bits are used in the final word - unsigned wordBits = BitWidth % APINT_BITS_PER_WORD; - if (wordBits == 0) - // If all bits are used, we want to leave the value alone. This also - // avoids the undefined behavior of >> when the shift is the same size as - // the word size (64). - return *this; + unsigned WordBits = ((BitWidth-1) % APINT_BITS_PER_WORD) + 1; // Mask out the high bits. - uint64_t mask = WORD_MAX >> (APINT_BITS_PER_WORD - wordBits); + uint64_t mask = WORD_MAX >> (APINT_BITS_PER_WORD - WordBits); if (isSingleWord()) VAL &= mask; else |
