[llvm] [RISCV] Remove vmv.s.x and vmv.x.s lmul pseudo variants (PR #71501)

[Philip Reames via llvm-commits]

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@@ -544,36 +544,36 @@ define <64 x i1> @buildvec_mask_v64i1() {
 ; RV32-LMULMAX1-LABEL: buildvec_mask_v64i1:
 ; RV32-LMULMAX1:       # %bb.0:
 ; RV32-LMULMAX1-NEXT:    li a0, 1776
-; RV32-LMULMAX1-NEXT:    vsetivli zero, 1, e16, mf4, ta, ma
+; RV32-LMULMAX1-NEXT:    vsetivli zero, 1, e16, m1, ta, ma
 ; RV32-LMULMAX1-NEXT:    vmv.s.x v0, a0
 ; RV32-LMULMAX1-NEXT:    lui a0, 4
 ; RV32-LMULMAX1-NEXT:    addi a0, a0, -1793
 ; RV32-LMULMAX1-NEXT:    vmv.s.x v9, a0
 ; RV32-LMULMAX1-NEXT:    lui a0, 11
 ; RV32-LMULMAX1-NEXT:    addi a0, a0, 1718
 ; RV32-LMULMAX1-NEXT:    vmv.s.x v8, a0
-; RV32-LMULMAX1-NEXT:    vmv1r.v v10, v8
+; RV32-LMULMAX1-NEXT:    vmv.v.v v10, v8
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preames wrote:

Luke and I talked offline.  He's correct that we do appear to have an intentional optimization to prefer the vmv.v.v form, and that addressed my concern for this review.

I am wondering about the merits of that vmv.v.v transform, but we can follow up on that separately.  

https://github.com/llvm/llvm-project/pull/71501