| Rafael Espindola | fdb00a9 | 2011-11-22 06:36:25 +0000 | [diff] [blame^] | 1 | ; RUN: llc -mtriple=x86_64-pc-linux %s -o - -regalloc=fast | FileCheck %s |
| Rafael Espindola | 254a132 | 2011-11-22 06:27:18 +0000 | [diff] [blame] | 2 | |
| 3 | ; We used to consider the early clobber in the second asm statement as |
| 4 | ; defining %0 before it was read. This caused us to omit the |
| 5 | ; movq -8(%rsp), %rdx |
| 6 | |
| 7 | ; CHECK: #APP |
| 8 | ; CHECK-NEXT: #NO_APP |
| 9 | ; CHECK-NEXT: movq %rcx, %rax |
| 10 | ; CHECK-NEXT: movq %rax, -8(%rsp) |
| 11 | ; CHECK-NEXT: movq -8(%rsp), %rdx |
| 12 | ; CHECK-NEXT: #APP |
| 13 | ; CHECK-NEXT: #NO_APP |
| 14 | ; CHECK-NEXT: movq %rdx, %rax |
| 15 | ; CHECK-NEXT: movq %rdx, -8(%rsp) |
| 16 | ; CHECK-NEXT: ret |
| 17 | |
| 18 | define i64 @foo() { |
| 19 | entry: |
| 20 | %0 = tail call i64 asm "", "={cx}"() nounwind |
| 21 | %1 = tail call i64 asm "", "=&r,0,r,~{rax}"(i64 %0, i64 %0) nounwind |
| 22 | ret i64 %1 |
| 23 | } |