[llvm-branch-commits] [llvm] [RISCV] Support memcmp expansion for vectors (PR #114517)

[via llvm-branch-commits]

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@@ -2952,5 +2952,22 @@ RISCVTTIImpl::enableMemCmpExpansion(bool OptSize, bool 
IsZeroCmp) const {
     Options.LoadSizes = {4, 2, 1};
     Options.AllowedTailExpansions = {3};
   }
+
+  if (IsZeroCmp && ST->hasVInstructions()) {
+    unsigned RealMinVLen = ST->getRealMinVLen();
+    // Support Fractional LMULs if the lengths are larger than XLen.
+    // TODO: Support non-power-of-2 types.
----------------
hiraditya wrote:

Should we create a github ticket for this?

https://github.com/llvm/llvm-project/pull/114517
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