[llvm] [InstCombine] Fold `(select C, (x bin_op a), x) bin_op b` into `x bin_op select C, (a bin_op b), b` (PR #173511)

via llvm-commits llvm-commits at lists.llvm.org
Thu Dec 25 08:39:55 PST 2025


github-actions[bot] wrote:

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp llvm/lib/Transforms/InstCombine/InstCombineInternal.h llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp llvm/lib/Transforms/InstCombine/InstructionCombining.cpp --diff_from_common_commit
``````````

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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.
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index afbdb6dbe..9d39f0d53 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -1909,7 +1909,7 @@ Instruction *InstCombinerImpl::foldSelectIntoBinOp(BinaryOperator &Op) {
                           SQ.getWithInstruction(&Op));
   } else
     return nullptr;
-  
+
   if (!NewTV || !NewFV)
     return nullptr;
 

``````````

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https://github.com/llvm/llvm-project/pull/173511


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