[llvm] [LV] Check all users of partial reductions in chain have same scale. (PR #162822)
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Tue Oct 21 06:24:51 PDT 2025
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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index f108232db..6ee646ef9 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -7915,9 +7915,10 @@ void VPRecipeBuilder::collectScaledReductions(VFRange &Range) {
// Check that all partial reductions in a chain are only used by other
// partial reductions with the same scale factor. Otherwise we end up creating
- // users of scaled reductions where the types of the other operands don't match.
+ // users of scaled reductions where the types of the other operands don't
+ // match.
for (const auto &[Chain, Scale] : PartialReductionChains) {
- auto AllUsersPartialRdx = [ScaleVal=Scale, this](const User *U) {
+ auto AllUsersPartialRdx = [ScaleVal = Scale, this](const User *U) {
auto *UI = cast<Instruction>(U);
if (isa<PHINode>(UI) && UI->getParent() == OrigLoop->getHeader()) {
return all_of(UI->users(), [ScaleVal, this](const User *U) {
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https://github.com/llvm/llvm-project/pull/162822
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