[llvm] [RISCV] Initial support for EarlyCSE (PR #138812)

[Luke Lau via llvm-commits]

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@@ -116,6 +117,50 @@ RISCVTTIImpl::getRISCVInstructionCost(ArrayRef<unsigned> OpCodes, MVT VT,
   return Cost;
 }
 
+Value *
+RISCVTTIImpl::getOrCreateResultFromMemIntrinsic(IntrinsicInst *Inst,
+                                                Type *ExpectedType) const {
+  Intrinsic::ID IID = Inst->getIntrinsicID();
+  switch (IID) {
+  default:
+    return nullptr;
+  // TODO: Add more memory intrinsic operations.
+  case Intrinsic::riscv_vle: {
+    if (Inst->getType() == ExpectedType)
+      return Inst;
+  }
+    return nullptr;
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lukel97 wrote:

Should this return be moved up into the braces above?

https://github.com/llvm/llvm-project/pull/138812