asm.c revision 3d91ddb9a97caf3e8950d4be6920ce8a4d308e76 
1// RUN: %clang_cc1 %s -Wno-private-extern -triple i386-pc-linux-gnu -verify -fsyntax-only
2
3void f() {
4  int i;
5
6  asm ("foo\n" : : "a" (i + 2));
7  asm ("foo\n" : : "a" (f())); // expected-error {{invalid type 'void' in asm input}}
8
9  asm ("foo\n" : "=a" (f())); // expected-error {{invalid lvalue in asm output}}
10  asm ("foo\n" : "=a" (i + 2)); // expected-error {{invalid lvalue in asm output}}
11
12  asm ("foo\n" : [symbolic_name] "=a" (i) : "[symbolic_name]" (i));
13  asm ("foo\n" : "=a" (i) : "[" (i)); // expected-error {{invalid input constraint '[' in asm}}
14  asm ("foo\n" : "=a" (i) : "[foo" (i)); // expected-error {{invalid input constraint '[foo' in asm}}
15  asm ("foo\n" : "=a" (i) : "[symbolic_name]" (i)); // expected-error {{invalid input constraint '[symbolic_name]' in asm}}
16}
17
18void clobbers() {
19  asm ("nop" : : : "ax", "#ax", "%ax");
20  asm ("nop" : : : "eax", "rax", "ah", "al");
21  asm ("nop" : : : "0", "%0", "#0");
22  asm ("nop" : : : "foo"); // expected-error {{unknown register name 'foo' in asm}}
23  asm ("nop" : : : "52");
24  asm ("nop" : : : "104"); // expected-error {{unknown register name '104' in asm}}
25  asm ("nop" : : : "-1"); // expected-error {{unknown register name '-1' in asm}}
26  asm ("nop" : : : "+1"); // expected-error {{unknown register name '+1' in asm}}
27}
28
29// rdar://6094010
30void test3() {
31  int x;
32  asm(L"foo" : "=r"(x)); // expected-error {{wide string}}
33  asm("foo" : L"=r"(x)); // expected-error {{wide string}}
34}
35
36// <rdar://problem/6156893>
37void test4(const volatile void *addr)
38{
39    asm ("nop" : : "r"(*addr)); // expected-error {{invalid type 'const volatile void' in asm input for constraint 'r'}}
40    asm ("nop" : : "m"(*addr));
41
42    asm ("nop" : : "r"(test4(addr))); // expected-error {{invalid type 'void' in asm input for constraint 'r'}}
43    asm ("nop" : : "m"(test4(addr))); // expected-error {{invalid lvalue in asm input for constraint 'm'}}
44
45    asm ("nop" : : "m"(f())); // expected-error {{invalid lvalue in asm input for constraint 'm'}}
46}
47
48// <rdar://problem/6512595>
49void test5() {
50  asm("nop" : : "X" (8));
51}
52
53// PR3385
54void test6(long i) {
55  asm("nop" : : "er"(i));
56}
57
58void asm_string_tests(int i) {
59  asm("%!");   // simple asm string, %! is not an error.
60  asm("%!" : );   // expected-error {{invalid % escape in inline assembly string}}
61  asm("xyz %" : );   // expected-error {{invalid % escape in inline assembly string}}
62
63  asm ("%[somename]" :: [somename] "i"(4)); // ok
64  asm ("%[somename]" :: "i"(4)); // expected-error {{unknown symbolic operand name in inline assembly string}}
65  asm ("%[somename" :: "i"(4)); // expected-error {{unterminated symbolic operand name in inline assembly string}}
66  asm ("%[]" :: "i"(4)); // expected-error {{empty symbolic operand name in inline assembly string}}
67
68  // PR3258
69  asm("%9" :: "i"(4)); // expected-error {{invalid operand number in inline asm string}}
70  asm("%1" : "+r"(i)); // ok, referring to input.
71}
72
73// PR4077
74int test7(unsigned long long b) {
75  int a;
76  asm volatile("foo %0 %1" : "=a" (a) :"0" (b)); // expected-error {{input with type 'unsigned long long' matching output with type 'int'}}
77  return a;
78}
79
80// <rdar://problem/7574870>
81asm volatile (""); // expected-warning {{meaningless 'volatile' on asm outside function}}
82
83// PR3904
84void test8(int i) {
85  // A number in an input constraint can't point to a read-write constraint.
86  asm("" : "+r" (i), "=r"(i) :  "0" (i)); // expected-error{{invalid input constraint '0' in asm}}
87}
88
89// PR3905
90void test9(int i) {
91  asm("" : [foo] "=r" (i), "=r"(i) : "1[foo]"(i)); // expected-error{{invalid input constraint '1[foo]' in asm}}
92  asm("" : [foo] "=r" (i), "=r"(i) : "[foo]1"(i)); // expected-error{{invalid input constraint '[foo]1' in asm}}
93}
94
95register int g asm("dx"); // expected-error{{global register variables are not supported}}
96
97void test10(void){
98  static int g asm ("g_asm") = 0;
99  extern int gg asm ("gg_asm");
100  __private_extern__ int ggg asm ("ggg_asm");
101
102  int a asm ("a_asm"); // expected-warning{{ignored asm label 'a_asm' on automatic variable}}
103  auto int aa asm ("aa_asm"); // expected-warning{{ignored asm label 'aa_asm' on automatic variable}}
104
105  register int r asm ("cx");
106  register int rr asm ("rr_asm"); // expected-error{{unknown register name 'rr_asm' in asm}}
107}
108
109// This is just an assert because of the boolean conversion.
110// Feel free to change the assembly to something sensible if it causes a problem.
111// rdar://problem/9414925
112void test11(void) {
113  _Bool b;
114  asm volatile ("movb %%gs:%P2,%b0" : "=q"(b) : "0"(0), "i"(5L));
115}
116
117void test12(void) {
118  register int cc __asm ("cc"); // expected-error{{unknown register name 'cc' in asm}}
119}
120
121// PR10223
122void test13(void) {
123  void *esp;
124  __asm__ volatile ("mov %%esp, %o" : "=r"(esp) : : ); // expected-error {{invalid % escape in inline assembly string}}
125}
126
127// <rdar://problem/12700799>
128struct S;  // expected-note {{forward declaration of 'struct S'}} expected-note {{forward declaration of 'struct S'}}
129void test14(struct S *s) {
130  __asm("": : "a"(*s)); // expected-error {{dereference of pointer to incomplete type 'struct S'}}
131  __asm("": "=a" (*s) :); // expected-error {{dereference of pointer to incomplete type 'struct S'}}
132}
133