[llvm] [LV] Check all users of partial reductions in chain have same scale. (PR #162822)

via llvm-commits llvm-commits at lists.llvm.org
Tue Oct 21 06:24:51 PDT 2025


github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp --diff_from_common_commit
``````````

:warning:
The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````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) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/162822


More information about the llvm-commits mailing list