1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2
3 #if !__has_extension(gnu_asm)
4 #error Extension 'gnu_asm' should be available by default
5 #endif
6
f1()7 void f1() {
8 // PR7673: Some versions of GCC support an empty clobbers section.
9 asm ("ret" : : :);
10 }
11
f2()12 void f2() {
13 asm("foo" : "=r" (a)); // expected-error {{use of undeclared identifier 'a'}}
14 asm("foo" : : "r" (b)); // expected-error {{use of undeclared identifier 'b'}}
15
16 asm const (""); // expected-warning {{ignored const qualifier on asm}}
17 asm volatile ("");
18 asm restrict (""); // expected-warning {{ignored restrict qualifier on asm}}
19 // FIXME: Once GCC supports _Atomic, check whether it allows this.
20 asm _Atomic (""); // expected-warning {{ignored _Atomic qualifier on asm}}
21 }
22
23 void a() __asm__(""); // expected-error {{cannot use an empty string literal in 'asm'}}
a()24 void a() {
25 __asm__(""); // ok
26 }
27
28 // rdar://5952468
29 __asm ; // expected-error {{expected '(' after 'asm'}}
30
31 // <rdar://problem/10465079> - Don't crash on wide string literals in 'asm'.
32 int foo asm (L"bar"); // expected-error {{cannot use wide string literal in 'asm'}}
33
34 asm() // expected-error {{expected string literal in 'asm'}}
35 // expected-error@-1 {{expected ';' after top-level asm block}}
36
37 asm(; // expected-error {{expected string literal in 'asm'}}
38
39 asm("") // expected-error {{expected ';' after top-level asm block}}
40
41 // Unterminated asm strings at the end of the file were causing us to crash, so
42 // this needs to be last. rdar://15624081
43 // expected-warning@+3 {{missing terminating '"' character}}
44 // expected-error@+2 {{expected string literal in 'asm'}}
45 // expected-error@+1 {{expected ';' after top-level asm block}}
46 asm("
47