1; RUN: llc -mtriple=x86_64-pc-linux-gnu %s -o - -no-integrated-as | FileCheck %s
2
3; C code this came from
4;bool cas(float volatile *p, float *expected, float desired) {
5;  bool success;
6;  __asm__ __volatile__("lock; cmpxchg %[desired], %[mem]; "
7;                       "mov %[expected], %[expected_out]; "
8;                       "sete %[success]"
9;                       : [success] "=a" (success),
10;                         [expected_out] "=rm" (*expected)
11;                       : [expected] "a" (*expected),
12;                         [desired] "q" (desired),
13;                         [mem] "m" (*p)
14;                       : "memory", "cc");
15;  return success;
16;}
17
18define zeroext i1 @cas(float* %p, float* %expected, float %desired) nounwind {
19entry:
20  %p.addr = alloca float*, align 8
21  %expected.addr = alloca float*, align 8
22  %desired.addr = alloca float, align 4
23  %success = alloca i8, align 1
24  store float* %p, float** %p.addr, align 8
25  store float* %expected, float** %expected.addr, align 8
26  store float %desired, float* %desired.addr, align 4
27  %0 = load float*, float** %expected.addr, align 8
28  %1 = load float*, float** %expected.addr, align 8
29  %2 = load float, float* %1, align 4
30  %3 = load float, float* %desired.addr, align 4
31  %4 = load float*, float** %p.addr, align 8
32  %5 = call i8 asm sideeffect "lock; cmpxchg $3, $4; mov $2, $1; sete $0", "={ax},=*rm,{ax},q,*m,~{memory},~{cc},~{dirflag},~{fpsr},~{flags}"(float* %0, float %2, float %3, float* %4) nounwind
33  store i8 %5, i8* %success, align 1
34  %6 = load i8, i8* %success, align 1
35  %tobool = trunc i8 %6 to i1
36  ret i1 %tobool
37}
38
39; CHECK: @cas
40; Make sure we're emitting a move from eax.
41; CHECK: #APP
42; CHECK-NEXT: lock;{{.*}}mov %eax,{{.*}}
43; CHECK-NEXT: #NO_APP
44
45define zeroext i1 @cas2(i8* %p, i8* %expected, i1 zeroext %desired) nounwind {
46entry:
47  %p.addr = alloca i8*, align 8
48  %expected.addr = alloca i8*, align 8
49  %desired.addr = alloca i8, align 1
50  %success = alloca i8, align 1
51  store i8* %p, i8** %p.addr, align 8
52  store i8* %expected, i8** %expected.addr, align 8
53  %frombool = zext i1 %desired to i8
54  store i8 %frombool, i8* %desired.addr, align 1
55  %0 = load i8*, i8** %expected.addr, align 8
56  %1 = load i8*, i8** %expected.addr, align 8
57  %2 = load i8, i8* %1, align 1
58  %tobool = trunc i8 %2 to i1
59  %3 = load i8, i8* %desired.addr, align 1
60  %tobool1 = trunc i8 %3 to i1
61  %4 = load i8*, i8** %p.addr, align 8
62  %5 = call i8 asm sideeffect "lock; cmpxchg $3, $4; mov $2, $1; sete $0", "={ax},=*rm,{ax},q,*m,~{memory},~{cc},~{dirflag},~{fpsr},~{flags}"(i8* %0, i1 %tobool, i1 %tobool1, i8* %4) nounwind
63  store i8 %5, i8* %success, align 1
64  %6 = load i8, i8* %success, align 1
65  %tobool2 = trunc i8 %6 to i1
66  ret i1 %tobool2
67}
68
69; CHECK: @cas2
70; Make sure we're emitting a move from %al here.
71; CHECK: #APP
72; CHECK-NEXT: lock;{{.*}}mov %al,{{.*}}
73; CHECK-NEXT: #NO_APP
74