[llvm] [InstCombine] fold `gepi _, (srem x, y)` to `gepi _, (urem x, y)` if `y` is power-of-2 (PR #180148)

[via llvm-commits]

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@@ -3347,6 +3348,40 @@ Instruction *InstCombinerImpl::visitGetElementPtrInst(GetElementPtrInst &GEP) {
     }
   }
 
+  // srem -> (and/urem) for inbounds+nuw byte GEP ---
+  if (GEPEltType->isIntegerTy(8) && Indices.size() == 1 && GEP.isInBounds() &&
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imkiva wrote:

Thank you and fixed accordingly

https://github.com/llvm/llvm-project/pull/180148