fixup! check instr in output

Author: michaelmaitland

llvm/test/CodeGen/MIR/skip-mir-comment-trailing-whitespace.mir

@@ -6,11 +6,12 @@ tracksRegLiveness: true
 body:             |
   bb.0:
     ; CHECK-LABEL: name: test_vse8{{$}}
+    ; CHECK: PseudoVSE8_V_MF8 %1, %2, %0, 3 /* e8 */ :: (store unknown-size, align 1)
     liveins: $x10, $v8, $x11
 
-    %2:gprnox0 = COPY $x11
+    %0:gprnox0 = COPY $x11
     %1:vr = COPY $v8
-    %0:gpr = COPY $x10
-    PseudoVSE8_V_MF8 %1, %0, %2, 3 /* e8 */ :: (store unknown-size, align 1)
+    %2:gpr = COPY $x10
+    PseudoVSE8_V_MF8 %1, %2, %0, 3 /* e8 */ :: (store unknown-size, align 1)
     PseudoRET
 ...