[llvm] [RISCV] Match prefetch address with offset (PR #66072)

[Craig Topper via llvm-commits]

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@@ -2441,6 +2441,22 @@ bool RISCVDAGToDAGISel::SelectAddrRegImm(SDValue Addr, SDValue &Base,
   return true;
 }
 
+bool RISCVDAGToDAGISel::SelectAddrRegImmLsb00000(SDValue Addr, SDValue &Base,
+                                                 SDValue &Offset) {
+
+  bool Found = SelectAddrRegImm(Addr, Base, Offset);
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topperc wrote:

I'm not sure we should use SelectAddrRegImm here. It creates new nodes for some cases, but then we might decide not to use them. I think we should directly handle the cases we want to handle.

https://github.com/llvm/llvm-project/pull/66072