Generate test checks correctly

Author: sc-clulzze

llvm/test/CodeGen/RISCV/branch-rel.mir

@@ -1,4 +1,4 @@
-# NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
 # RUN: llc %s -mtriple=riscv64 -run-pass=branch-relaxation -o - -verify-machineinstrs | FileCheck %s
 
 --- |
@@ -10,6 +10,22 @@
 name:            foo
 tracksRegLiveness: true
 body:             |
+  ; CHECK-LABEL: name: foo
+  ; CHECK: bb.0:
+  ; CHECK-NEXT:   successors: %bb.2(0x80000000)
+  ; CHECK-NEXT:   liveins: $x1
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   PseudoBR %bb.2
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT: bb.1:
+  ; CHECK-NEXT:   successors: %bb.2(0x80000000)
+  ; CHECK-NEXT:   liveins: $x1
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   INLINEASM &".space 4096", 1 /* sideeffect attdialect */
+  ; CHECK-NEXT:   BGE $x1, $x0, %bb.2
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT: bb.2:
+  ; CHECK-NEXT:   PseudoRET
   bb.0:
     liveins: $x1
     BNE $x1, $x0, %bb.3
@@ -21,4 +37,3 @@ body:             |
   bb.3:
     PseudoRET
 ## NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-# CHECK: {{.*}}