volatile.c revision b27442c54b4b48d8b519709c7d683349bd2c71dd 
1// RUN: clang-cc -emit-llvm < %s -o %t &&
2// RUN: grep volatile %t | count 25 &&
3// RUN: grep memcpy %t | count 5
4
5// The number 26 comes from the current codegen for volatile loads;
6// if this number changes, it's not necessarily something wrong, but
7// something has changed to affect volatile load/store codegen
8
9int S;
10volatile int vS;
11
12int* pS;
13volatile int* pvS;
14
15int A[10];
16volatile int vA[10];
17
18struct { int x; } F;
19struct { volatile int x; } vF;
20
21struct { int x; } F2;
22volatile struct { int x; } vF2;
23volatile struct { int x; } *vpF2;
24
25struct { struct { int y; } x; } F3;
26volatile struct { struct { int y; } x; } vF3;
27
28struct { int x:3; } BF;
29struct { volatile int x:3; } vBF;
30
31typedef int v4si __attribute__ ((vector_size (16)));
32v4si V;
33volatile v4si vV;
34
35typedef __attribute__(( ext_vector_type(4) )) int extv4;
36extv4 VE;
37volatile extv4 vVE;
38
39volatile struct {int x;} aggFct(void);
40
41void main() {
42  int i;
43
44  // load
45  i=S;
46  i=vS;
47  i=*pS;
48  i=*pvS;
49  i=A[2];
50  i=vA[2];
51  i=F.x;
52  i=vF.x;
53  i=F2.x;
54  i=vF2.x;
55  i=vpF2->x;
56  i=F3.x.y;
57  i=vF3.x.y;
58  i=BF.x;
59  i=vBF.x;
60  i=V[3];
61  i=vV[3];
62  i=VE.yx[1];
63  i=vVE.zy[1];
64  i = aggFct().x;
65
66
67  // store
68  S=i;
69  vS=i;
70  *pS=i;
71  *pvS=i;
72  A[2]=i;
73  vA[2]=i;
74  F.x=i;
75  vF.x=i;
76  F2.x=i;
77  vF2.x=i;
78  vpF2->x=i;
79  vF3.x.y=i;
80  BF.x=i;
81  vBF.x=i;
82  V[3]=i;
83  vV[3]=i;
84
85  // other ops:
86  ++S;
87  ++vS;
88  i+=S;
89  i+=vS;
90  (void)vF2;
91  vF2 = vF2;
92  vF2 = vF2 = vF2;
93}
94