[llvm] [InstCombine] Simplify (A >= 0) & ((A & INT_MAX) != 0) to A > 0 (PR #207209)

via llvm-commits llvm-commits at lists.llvm.org
Thu Jul 2 10:13:19 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.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/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index ba7bb64df..26b4b9b9a 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -3552,11 +3552,11 @@ Value *InstCombinerImpl::foldAndOrOfICmps(ICmpInst *LHS, ICmpInst *RHS,
         match(RHS0, m_And(m_Specific(LHS0), m_APInt(MaskC))) &&
         IsValidMask(LHS0, *MaskC)) {
       if (IsAnd && !TrueIfSigned)
-        return Builder.CreateICmpSGT(LHS0,
-                                     ConstantInt::getNullValue(LHS0->getType()));
+        return Builder.CreateICmpSGT(
+            LHS0, ConstantInt::getNullValue(LHS0->getType()));
       if (!IsAnd && TrueIfSigned)
-        return Builder.CreateICmpSLE(LHS0,
-                                     ConstantInt::getNullValue(LHS0->getType()));
+        return Builder.CreateICmpSLE(
+            LHS0, ConstantInt::getNullValue(LHS0->getType()));
     }
     if (isSignBitCheck(PredR, *RHSC, TrueIfSigned) &&
         PredL == (IsAnd ? ICmpInst::ICMP_NE : ICmpInst::ICMP_EQ) &&
@@ -3564,11 +3564,11 @@ Value *InstCombinerImpl::foldAndOrOfICmps(ICmpInst *LHS, ICmpInst *RHS,
         match(LHS0, m_And(m_Specific(RHS0), m_APInt(MaskC))) &&
         IsValidMask(RHS0, *MaskC)) {
       if (IsAnd && !TrueIfSigned)
-        return Builder.CreateICmpSGT(RHS0,
-                                     ConstantInt::getNullValue(RHS0->getType()));
+        return Builder.CreateICmpSGT(
+            RHS0, ConstantInt::getNullValue(RHS0->getType()));
       if (!IsAnd && TrueIfSigned)
-        return Builder.CreateICmpSLE(RHS0,
-                                     ConstantInt::getNullValue(RHS0->getType()));
+        return Builder.CreateICmpSLE(
+            RHS0, ConstantInt::getNullValue(RHS0->getType()));
     }
   }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/207209


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