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

[Yingwei Zheng via llvm-commits]

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@@ -3560,7 +3595,8 @@ Value *InstCombinerImpl::foldAndOrOfICmps(ICmpInst *LHS, ICmpInst *RHS,
   // where CMAX is the all ones value for the truncated type,
   // iff the lower bits of C2 and CA are zero.
   if (PredL == (IsAnd ? ICmpInst::ICMP_EQ : ICmpInst::ICMP_NE) &&
-      PredL == PredR && LHS->hasOneUse() && RHS->hasOneUse()) {
+      PredL.dropSameSign() == PredR.dropSameSign() && LHS->hasOneUse() &&
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dtcxzyw wrote:

LHSOneUse && RHSOneUse

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