[llvm] [InstCombine] Optimize and of overflow checks (PR #141962)
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Sun Sep 14 05:32:52 PDT 2025
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Analysis/InstructionSimplify.cpp
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``````````diff
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp
index 30ed2c14c..3ace9b4a0 100644
--- a/llvm/lib/Analysis/InstructionSimplify.cpp
+++ b/llvm/lib/Analysis/InstructionSimplify.cpp
@@ -2178,10 +2178,8 @@ static Value *simplifyAndInst(Value *Op0, Value *Op1, const SimplifyQuery &Q,
// (X <= ~Y) && (Y > ~X) --> 0
CmpPredicate Pred0, Pred1;
- if (match(Op0,
- m_c_ICmp(Pred0, m_Value(X), m_Not(m_Value(Y)))) &&
- match(Op1, m_c_ICmp(Pred1, m_Specific(Y),
- m_Not(m_Specific(X))))) {
+ if (match(Op0, m_c_ICmp(Pred0, m_Value(X), m_Not(m_Value(Y)))) &&
+ match(Op1, m_c_ICmp(Pred1, m_Specific(Y), m_Not(m_Specific(X))))) {
if (ICmpInst::isSigned(Pred0) == ICmpInst::isSigned(Pred1)) {
if (ICmpInst::isLE(Pred0) && ICmpInst::isGT(Pred1))
return ConstantInt::getFalse(Op0->getType());
``````````
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https://github.com/llvm/llvm-project/pull/141962
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