[llvm] [RISCV] Be more aggressive about forming floating point constants (PR #68433)

[Craig Topper via llvm-commits]

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@@ -8920,6 +8914,17 @@ SDValue RISCVTargetLowering::lowerINSERT_SUBVECTOR(SDValue Op,
       return DAG.getBitcast(Op.getValueType(), SubVec);
     }
 
+    // Shrink down Vec so we're performing the slideup on a smaller LMUL.
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topperc wrote:

I think you got an extra commit in here?

https://github.com/llvm/llvm-project/pull/68433