[llvm] [RISCV] Fold (fmv_x_h/w (load)) to an integer load. (PR #109900)

[Craig Topper via llvm-commits]

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@@ -16984,6 +16984,17 @@ SDValue RISCVTargetLowering::PerformDAGCombine(SDNode *N,
       return Op0.getOperand(0);
     }
 
+    if (ISD::isNormalLoad(Op0.getNode()) && Op0.hasOneUse() &&
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topperc wrote:

I don't know what the offset field in LoadSDNode is for. We don't use it on RISC-V or X86. The immediate offset is represented by a separate ADD node in the base pointer that we pattern match at isel.

https://github.com/llvm/llvm-project/pull/109900