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-rw-r--r--llvm/lib/Support/APInt.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index 1ea6319acfa..48b9613b3ec 100644
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -428,11 +428,12 @@ APInt APInt::extractBits(unsigned numBits, unsigned bitPosition) const {
unsigned NumSrcWords = getNumWords();
unsigned NumDstWords = Result.getNumWords();
+ uint64_t *DestPtr = Result.isSingleWord() ? &Result.U.VAL : Result.U.pVal;
for (unsigned word = 0; word < NumDstWords; ++word) {
uint64_t w0 = U.pVal[loWord + word];
uint64_t w1 =
(loWord + word + 1) < NumSrcWords ? U.pVal[loWord + word + 1] : 0;
- Result.U.pVal[word] = (w0 >> loBit) | (w1 << (APINT_BITS_PER_WORD - loBit));
+ DestPtr[word] = (w0 >> loBit) | (w1 << (APINT_BITS_PER_WORD - loBit));
}
return Result.clearUnusedBits();
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