[llvm] [InstCombine] fold float clamp pattern into llvm.max/min (PR #159652)

via llvm-commits llvm-commits at lists.llvm.org
Thu Sep 18 14:19:38 PDT 2025


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
``````````

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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
index f38e886a3..0b874a0d5 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -4010,8 +4010,9 @@ static Value *foldSelectICmpIntoMaxMin(SelectInst &SI,
   // Note: OneUse check for `Cmp` is necessary because it makes sure that other
   // InstCombine folds don't undo this transformation and cause an infinite
   // loop. Furthermore, it could also increase the operation count.
-  if (match(&SI, m_OneUse(m_Select(m_OneUse(m_FCmp(Pred, m_Value(X), m_Value(Y))),
-                          m_Value(TVal), m_Value(FVal)))))
+  if (match(&SI,
+            m_OneUse(m_Select(m_OneUse(m_FCmp(Pred, m_Value(X), m_Value(Y))),
+                              m_Value(TVal), m_Value(FVal)))))
     return TryFoldIntoMaxMinIntrinsic(Pred, X, Y, TVal, FVal);
 
   return nullptr;

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https://github.com/llvm/llvm-project/pull/159652


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