|  | # RUN: not llvm-mc %s -triple=mips-unknown-unknown -mcpu=mips32 2>%t1 | 
|  | # RUN: FileCheck %s < %t1 | 
|  |  | 
|  | .set at~ | 
|  | # CHECK: error: unexpected token, expected equals sign | 
|  |  | 
|  | .set at= | 
|  | # CHECK: error: no register specified | 
|  |  | 
|  | .set at=~ | 
|  | # CHECK: error: unexpected token, expected dollar sign '$' | 
|  |  | 
|  | .set at=$ | 
|  | # CHECK: error: unexpected token, expected identifier or integer | 
|  |  | 
|  | .set at=$-4 | 
|  | # CHECK: error: unexpected token, expected identifier or integer | 
|  |  | 
|  | .set at=$1000 | 
|  | # CHECK: error: invalid register | 
|  |  | 
|  | .set at=$foo | 
|  | # CHECK: error: invalid register | 
|  |  | 
|  | .set at=$2bar | 
|  | # CHECK: error: unexpected token, expected end of statement | 
|  |  | 
|  | .set noat bar | 
|  | # CHECK: error: unexpected token, expected end of statement |