[llvm] [InstCombine] Prepare to support trunc nuw condition in foldAndOrOfICmps (NFC) (PR #221555)

[Yingwei Zheng via llvm-commits]

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@@ -806,14 +815,13 @@ foldAndOrOfICmpsWithPow2AndWithZero(InstCombiner::BuilderTy &Builder,
   // be one-use. We don't create additional instructions if only one
   // of them is one-use. So cases where one is one-use and the other
   // is two-use might be profitable.
-  if (!match(LHS, m_OneUse(m_ICmp(Pred, m_Value(Op), m_Zero()))) ||
-      !match(RHS, m_OneUse(m_c_ICmp(Pred, m_Specific(Op), m_Value(Pow2)))) ||
-      match(Pow2, m_One()) ||
-      !isKnownToBeAPowerOfTwo(Pow2, Q.DL, /*OrZero=*/true, Q.AC, Q.CxtI, Q.DT))
+  if (!LHSOneUse || !RHSOneUse || !match(LHS1, m_Zero()) || RHS0 != LHS0 ||
+      match(RHS1, m_One()) ||
+      !isKnownToBeAPowerOfTwo(RHS1, Q.DL, /*OrZero=*/true, Q.AC, Q.CxtI, Q.DT))
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dtcxzyw wrote:

isKnownToBeAPowerOfTwo supports passing SQ directly.


https://github.com/llvm/llvm-project/pull/221555