[RISCV] Use $noreg in vsetvli-insert.mir test. NFC

This reflects what actually comes out of SelectionDAG after the noreg passthru
peephole added in a63bd7e.

Author: lukel97

llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.mir

@@ -320,8 +320,8 @@ body:             |
     ; CHECK-NEXT: %pt:vr = IMPLICIT_DEF
     ; CHECK-NEXT: dead $x0 = PseudoVSETIVLI 2, 216 /* e64, m1, ta, ma */, implicit-def $vl, implicit-def $vtype
     ; CHECK-NEXT: [[PseudoVLE64_V_M1_:%[0-9]+]]:vr = PseudoVLE64_V_M1 %pt, [[COPY]], 2, 6 /* e64 */, 0 /* tu, mu */, implicit $vl, implicit $vtype :: (load (s128) from %ir.x)
-    ; CHECK-NEXT: dead [[PseudoVSETVLIX0_:%[0-9]+]]:gpr = PseudoVSETVLIX0 $x0, 152 /* e64, m1, tu, ma */, implicit-def $vl, implicit-def $vtype
-    ; CHECK-NEXT: [[PseudoVMV_V_I_M1_:%[0-9]+]]:vr = PseudoVMV_V_I_M1 undef $v2, 0, -1, 6 /* e64 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
+    ; CHECK-NEXT: dead [[PseudoVSETVLIX0_:%[0-9]+]]:gpr = PseudoVSETVLIX0 $x0, 216 /* e64, m1, ta, ma */, implicit-def $vl, implicit-def $vtype
+    ; CHECK-NEXT: [[PseudoVMV_V_I_M1_:%[0-9]+]]:vr = PseudoVMV_V_I_M1 $noreg, 0, -1, 6 /* e64 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
     ; CHECK-NEXT: [[DEF:%[0-9]+]]:vr = IMPLICIT_DEF
     ; CHECK-NEXT: dead $x0 = PseudoVSETIVLI 2, 216 /* e64, m1, ta, ma */, implicit-def $vl, implicit-def $vtype
     ; CHECK-NEXT: [[PseudoVREDSUM_VS_M1_E8_:%[0-9]+]]:vr = PseudoVREDSUM_VS_M1_E8 [[DEF]], killed [[PseudoVLE64_V_M1_]], killed [[PseudoVMV_V_I_M1_]], 2, 6 /* e64 */, 1 /* ta, mu */, implicit $vl, implicit $vtype
@@ -331,7 +331,7 @@ body:             |
     %0:gpr = COPY $x10
     %pt:vr = IMPLICIT_DEF
     %1:vr = PseudoVLE64_V_M1 %pt, %0, 2, 6, 0 :: (load (s128) from %ir.x)
-    %2:vr = PseudoVMV_V_I_M1 undef $v2, 0, -1, 6, 0
+    %2:vr = PseudoVMV_V_I_M1 $noreg, 0, -1, 6, 0
     %4:vr = IMPLICIT_DEF
     %3:vr = PseudoVREDSUM_VS_M1_E8 %4, killed %1, killed %2, 2, 6, 1
     %5:gpr = PseudoVMV_X_S killed %3, 6
@@ -442,12 +442,12 @@ body:             |
     ; CHECK-NEXT: %pt:vrm2 = IMPLICIT_DEF
     ; CHECK-NEXT: dead $x0 = PseudoVSETIVLI 4, 217 /* e64, m2, ta, ma */, implicit-def $vl, implicit-def $vtype
     ; CHECK-NEXT: [[PseudoVID_V_M2_:%[0-9]+]]:vrm2 = PseudoVID_V_M2 %pt, 4, 6 /* e64 */, 3 /* ta, ma */, implicit $vl, implicit $vtype
-    ; CHECK-NEXT: dead $x0 = PseudoVSETVLIX0 killed $x0, 134 /* e8, mf4, tu, ma */, implicit-def $vl, implicit-def $vtype, implicit $vl
-    ; CHECK-NEXT: [[PseudoVMV_V_I_MF4_:%[0-9]+]]:vr = PseudoVMV_V_I_MF4 undef [[PseudoVMV_V_I_MF4_]], 0, 4, 3 /* e8 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
+    ; CHECK-NEXT: dead $x0 = PseudoVSETVLIX0 killed $x0, 198 /* e8, mf4, ta, ma */, implicit-def $vl, implicit-def $vtype, implicit $vl
+    ; CHECK-NEXT: [[PseudoVMV_V_I_MF4_:%[0-9]+]]:vr = PseudoVMV_V_I_MF4 $noreg, 0, 4, 3 /* e8 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
     ; CHECK-NEXT: PseudoRET
     %pt:vrm2 = IMPLICIT_DEF
     %0:vrm2 = PseudoVID_V_M2 %pt, 4, 6, 3
-    %4:vr = PseudoVMV_V_I_MF4 undef %4, 0, 4, 3, 0
+    %4:vr = PseudoVMV_V_I_MF4 $noreg, 0, 4, 3, 0
     PseudoRET
 ...
 ---
@@ -484,7 +484,7 @@ body:             |
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.4:
   ; CHECK-NEXT:   $x0 = PseudoVSETIVLI 2, 215 /* e32, mf2, ta, ma */, implicit-def $vl, implicit-def $vtype
-  ; CHECK-NEXT:   [[PseudoVMV_X_S_:%[0-9]+]]:gpr = PseudoVMV_X_S $noreg, 5 /* e32 */, implicit $vtype
+  ; CHECK-NEXT:   [[PseudoVMV_X_S:%[0-9]+]]:gpr = PseudoVMV_X_S $noreg, 5 /* e32 */, implicit $vtype
   ; CHECK-NEXT:   [[PseudoVMV_V_I_MF2_1:%[0-9]+]]:vr = PseudoVMV_V_I_MF2 $noreg, 1, 2, 5 /* e32 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
   ; CHECK-NEXT:   PseudoRET
   bb.0: