Precommit tests

Author: lukel97

llvm/test/CodeGen/RISCV/rvv/vmv.v.v-peephole.mir

@@ -18,3 +18,45 @@ body: |
     %y:gpr = ADDI $x0, 1
     %z:vr = PseudoVMV_V_V_M1 %passthru, %x, 4, 5 /* e32 */, 0 /* tu, mu */
 ...
+---
+name: tail_agnostic
+body: |
+  bb.0:
+    liveins: $v8
+    ; CHECK-LABEL: name: tail_agnostic
+    ; CHECK: liveins: $v8
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: %passthru:vr = COPY $v8
+    ; CHECK-NEXT: %x:vr = PseudoVADD_VV_M1 %passthru, $noreg, $noreg, 4, 5 /* e32 */, 0 /* tu, mu */
+    %passthru:vr = COPY $v8
+    %x:vr = PseudoVADD_VV_M1 %passthru, $noreg, $noreg, 4, 5 /* e32 */, 0 /* tu, mu */
+    %y:vr = PseudoVMV_V_V_M1 %passthru, %x, 4, 5 /* e32 */, 1 /* ta, mu */
+...
+---
+name: tail_agnostic_larger_vl
+body: |
+  bb.0:
+    liveins: $v8
+    ; CHECK-LABEL: name: tail_agnostic_larger_vl
+    ; CHECK: liveins: $v8
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: %passthru:vr = COPY $v8
+    ; CHECK-NEXT: %x:vr = PseudoVADD_VV_M1 %passthru, $noreg, $noreg, 4, 5 /* e32 */, 0 /* tu, mu */
+    %passthru:vr = COPY $v8
+    %x:vr = PseudoVADD_VV_M1 %passthru, $noreg, $noreg, 4, 5 /* e32 */, 0 /* tu, mu */
+    %y:vr = PseudoVMV_V_V_M1 %passthru, %x, 5, 5 /* e32 */, 1 /* ta, mu */
+...
+---
+name: undef_passthru_src_undef_passthru
+body: |
+  bb.0:
+    liveins: $v8
+    ; CHECK-LABEL: name: undef_passthru_src_undef_passthru
+    ; CHECK: liveins: $v8
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: %passthru:vr = COPY $v8
+    ; CHECK-NEXT: %x:vr = PseudoVADD_VV_M1 $noreg, $noreg, $noreg, 4, 5 /* e32 */, 0 /* tu, mu */
+    %passthru:vr = COPY $v8
+    %x:vr = PseudoVADD_VV_M1 $noreg, $noreg, $noreg, 4, 5 /* e32 */, 0 /* tu, mu */
+    %y:vr = PseudoVMV_V_V_M1 $noreg, %x, 4, 5 /* e32 */, 0 /* tu, mu */
+...