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

[Philip Reames 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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preames wrote:

Is there something here preventing the load from having an offset?   I think the answer is that the load must be a vector load, and that we don't have base+offset addressing for that form, but could you add an assert here to confirm the offset is zero?

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