Description of problem:

// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o %t
// RUN: llvm-objdump -d %t | FileCheck %s

//PR18303
.global edata
sub $edata, %r12 // CHECK: subq $0, %r12
.code32


Actual results:

test/MC/X86/fixup-cpu-mode.s:6:28: error: expected string not found in input
sub $edata, %r12 // CHECK: subq $0, %r12
                           ^
<stdin>:2:1: note: scanning from here
foo: file format ELF64-x86-64
^
<stdin>:6:23: note: possible intended match here
 0: 81 ec 00 00 00 00 subl $0, %esp


Expected results:

 <silence> (test success)

Additional info:

http://llvm.org/bugs/show_bug.cgi?id=18303