1 // RUN: %clang_cc1 %s -Wno-private-extern -triple i386-pc-linux-gnu -verify -fsyntax-only 2 3 void 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 18 void 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 30 void 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> 37 void 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> 49 void test5() { 50 asm("nop" : : "X" (8)); 51 } 52 53 // PR3385 54 void test6(long i) { 55 asm("nop" : : "er"(i)); 56 } 57 58 void 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 74 int 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> 81 asm volatile (""); // expected-warning {{meaningless 'volatile' on asm outside function}} 82 83 // PR3904 84 void 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 90 void 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 95 register int g asm("dx"); // expected-error{{global register variables are not supported}} 96 97 void 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 112 void test11(void) { 113 _Bool b; 114 asm volatile ("movb %%gs:%P2,%b0" : "=q"(b) : "0"(0), "i"(5L)); 115 } 116 117 void test12(void) { 118 register int cc __asm ("cc"); // expected-error{{unknown register name 'cc' in asm}} 119 } 120 121 // PR10223 122 void 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> 128 struct S; // expected-note 2 {{forward declaration of 'struct S'}} 129 void 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 } 133 134 // PR15759. 135 double test15() { 136 double ret = 0; 137 __asm("0.0":"="(ret)); // expected-error {{invalid output constraint '=' in asm}} 138 __asm("0.0":"=&"(ret)); // expected-error {{invalid output constraint '=&' in asm}} 139 __asm("0.0":"+?"(ret)); // expected-error {{invalid output constraint '+?' in asm}} 140 __asm("0.0":"+!"(ret)); // expected-error {{invalid output constraint '+!' in asm}} 141 __asm("0.0":"+#"(ret)); // expected-error {{invalid output constraint '+#' in asm}} 142 __asm("0.0":"+*"(ret)); // expected-error {{invalid output constraint '+*' in asm}} 143 __asm("0.0":"=%"(ret)); // expected-error {{invalid output constraint '=%' in asm}} 144 __asm("0.0":"=,="(ret)); // expected-error {{invalid output constraint '=,=' in asm}} 145 __asm("0.0":"=,g"(ret)); // no-error 146 __asm("0.0":"=g"(ret)); // no-error 147 return ret; 148 } 149