[llvm] [InstCombine] Simplify call to abs if it is known one side is positive (PR #157675)

via llvm-commits llvm-commits at lists.llvm.org
Tue Sep 9 06:51:59 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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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
index d09c9d9d8..bdb9a528d 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -1167,7 +1167,8 @@ static Value *foldSelectPositiveAbs(ICmpInst *Cmp, Value *TVal, Value *FVal,
   // Check if false value is abs(X)
   Value *X;
   Constant *IntMinIsPoison;
-  if (!match(FVal, m_Intrinsic<Intrinsic::abs>(m_Value(X), m_Constant(IntMinIsPoison))))
+  if (!match(FVal, m_Intrinsic<Intrinsic::abs>(m_Value(X),
+                                               m_Constant(IntMinIsPoison))))
     return nullptr;
 
   ICmpInst::Predicate Pred = Cmp->getPredicate();

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https://github.com/llvm/llvm-project/pull/157675


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