| // RUN: FileCheck -input-file %s %s | 
 |  | 
 | op1 r1 | 
 | op2 r1, r2 | 
 | ; CHECK:        op1 [[REG:r[0-9]]] | 
 | ; CHECK-NEXT:   op2 [[REG]] | 
 |  | 
 | op3 r16, r18, r21 | 
 | op4 r30, r18, r21 | 
 | ; CHECK:        op3 {{r[0-9]+}}, [[REGa:r[0-9]+]], [[REGb:r[0-9]+]] | 
 | ; CHECK-NEXT:   op4 {{r[0-9]+}}, [[REGa]], [[REGb]] | 
 |  | 
 |  | 
 | // RUN: %ProtectFileCheckOutput \ | 
 | // RUN: not FileCheck --check-prefixes INVALID-VARNAME --input-file %s %s 2>&1 \ | 
 | // RUN:   | FileCheck --check-prefix INVALID-VARNAME-MSG --strict-whitespace %s | 
 |  | 
 | 5 | 
 | 4 | 
 | ; INVALID-VARNAME: [[X:]] | 
 | ; INVALID-VARNAME-NEXT: [[Y:]] | 
 | ; INVALID-VARNAME-NEXT: [[X-Y]] | 
 | ; INVALID-VARNAME-MSG: simple-var-capture.txt:[[#@LINE-1]]:27: error: invalid name in string variable use | 
 | ; INVALID-VARNAME-MSG-NEXT: ; {{I}}NVALID-VARNAME-NEXT: {{\[\[X-Y\]\]}} | 
 | ; INVALID-VARNAME-MSG-NEXT:    {{^}}                          ^{{$}} |