[llvm] [InstCombine] support trunc condition in foldSelectICmpAndAnd (PR #223132)

via llvm-commits llvm-commits at lists.llvm.org
Sat Sep 12 01:45:53 PDT 2026


github-actions[bot] wrote:

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


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/IR/PatternMatch.h llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp --diff_from_common_commit
``````````

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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 cdd86306e..a4061bbd6 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -780,9 +780,8 @@ static Instruction *foldSelectICmpAndAnd(Type *SelType, const Value *Cond,
                  SelType->getScalarSizeInBits());
   auto TValPattern = m_CombineOr(
       m_Deferred(X),
-      m_LShr(m_Deferred(X),
-             m_Value(Z, m_SpecificInt_ICMP_ForbidPoison(CmpInst::ICMP_ULT,
-                                                         BitWidth))));
+      m_LShr(m_Deferred(X), m_Value(Z, m_SpecificInt_ICMP_ForbidPoison(
+                                           CmpInst::ICMP_ULT, BitWidth))));
 
   if (!match(A, TValPattern)) {
     std::swap(X, Y);

``````````

</details>


https://github.com/llvm/llvm-project/pull/223132


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