[llvm] [RISCV] Don't use EVL/Mask for vid when lowering vp.reverse (PR #123048)

[Pengcheng Wang via llvm-commits]

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@@ -5,15 +5,17 @@
 define <2 x i1> @test_vp_reverse_v2i1_masked(<2 x i1> %src, <2 x i1> %mask, i32 zeroext %evl) {
 ; CHECK-LABEL: test_vp_reverse_v2i1_masked:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli zero, a0, e8, mf8, ta, ma
-; CHECK-NEXT:    vmv.v.i v9, 0
-; CHECK-NEXT:    addi a0, a0, -1
-; CHECK-NEXT:    vmerge.vim v9, v9, 1, v0
+; CHECK-NEXT:    vsetvli zero, a0, e16, mf4, ta, ma
+; CHECK-NEXT:    vmv1r.v v9, v0
 ; CHECK-NEXT:    vmv1r.v v0, v8
-; CHECK-NEXT:    vsetvli zero, zero, e16, mf4, ta, ma
-; CHECK-NEXT:    vid.v v10, v0.t
+; CHECK-NEXT:    addi a0, a0, -1
+; CHECK-NEXT:    vid.v v10
 ; CHECK-NEXT:    vrsub.vx v10, v10, a0, v0.t
 ; CHECK-NEXT:    vsetvli zero, zero, e8, mf8, ta, ma
+; CHECK-NEXT:    vmv.v.i v11, 0
+; CHECK-NEXT:    vmv1r.v v0, v9
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wangpc-pp wrote:

Regressions?

https://github.com/llvm/llvm-project/pull/123048