|  | ; RUN: FileCheck -input-file %s %s | 
|  |  | 
|  | add r10, r1, r2 | 
|  | add r11, r3, r4 | 
|  | mul r5, r10, r11 | 
|  |  | 
|  | mul r11, r3, r4 | 
|  | mul r10, r1, r2 | 
|  | add r5, r10, r11 | 
|  |  | 
|  | add r11, r3, r4 | 
|  | add r10, r1, r2 | 
|  | mul r5, r10, r11 | 
|  |  | 
|  | # begin | 
|  | # end | 
|  | xor | 
|  |  | 
|  | ; CHECK-DAG: add [[REG1:r[0-9]+]], r1, r2 | 
|  | ; CHECK-DAG: add [[REG2:r[0-9]+]], r3, r4 | 
|  | ; CHECK: mul r5, [[REG1]], [[REG2]] | 
|  |  | 
|  | ; CHECK-DAG: mul [[REG1:r[0-9]+]], r1, r2 | 
|  | ; CHECK-DAG: mul [[REG2:r[0-9]+]], r3, r4 | 
|  | ; CHECK: add r5, [[REG1]], [[REG2]] | 
|  |  | 
|  | ; CHECK-DAG: add [[REG1:r[0-9]+]], r1, r2 | 
|  | ; CHECK-DAG: add [[REG2:r[0-9]+]], r3, r4 | 
|  | ; CHECK-NOT: xor | 
|  | ; CHECK-DAG: mul r5, [[REG1]], [[REG2]] | 
|  |  | 
|  | ; CHECK-DAG: begin | 
|  | ; CHECK-NOT: xor | 
|  | ; CHECK-DAG: end | 
|  | ; CHECK: xor |