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ReduxWidth check for 0 #123257

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Merged
merged 2 commits into from
Jan 17, 2025
Merged

ReduxWidth check for 0 #123257

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071217c
ReduxWidth check for 0
gchaltas Jan 16, 2025
d75713c
ReduxWidtch check for 0 - formatting fixed
gchaltas Jan 17, 2025
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1 change: 1 addition & 0 deletions llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -20080,6 +20080,7 @@ class HorizontalReduction {
NumRegs =
TTI.getNumberOfRegisters(TTI.getRegisterClassForType(true, Tp));
while (NumParts > NumRegs) {
assert(ReduxWidth > 0 && "ReduxWidth is unexpectedly 0.");
ReduxWidth = bit_floor(ReduxWidth - 1);
VectorType *Tp = getWidenedType(ScalarTy, ReduxWidth);
NumParts = TTI.getNumberOfParts(Tp);
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