[llvm] [InstCombine] Fold xored one-complemented operand comparisons (PR #69882)

Yingwei Zheng via llvm-commits llvm-commits at lists.llvm.org
Tue Oct 24 06:26:54 PDT 2023


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@@ -7127,6 +7127,20 @@ Instruction *InstCombinerImpl::visitICmpInst(ICmpInst &I) {
       return new ICmpInst(I.getInversePredicate(), Builder.CreateAnd(A, B),
                           Op1);
 
+    // Transform (~A ^ B) s< ~A --> (A ^ B) s> A,
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dtcxzyw wrote:

Please update comments.

https://github.com/llvm/llvm-project/pull/69882


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