clang/test/Parser/asm-goto.c

   1 // RUN: %clang_cc1 -triple i386-pc-linux-gnu -fsyntax-only -verify %s
   2 // RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -fsyntax-only -verify %s
   3
   4 #if !__has_extension(gnu_asm)
   5 #error Extension 'gnu_asm' should be available by default
   6 #endif
   7 #if !__has_extension(gnu_asm_goto_with_outputs)
   8 #error Extension 'gnu_asm_goto_with_outputs' should be available by default
   9 #endif
  10 #if !__has_extension(gnu_asm_goto_with_outputs_full)
  11 #error Extension 'gnu_asm_goto_with_outputs_full' should be available by default
  12 #endif
  13
  14 int a, b, c, d, e, f, g, h, i, j, k, l;
  15
  16 void test(void) {
  17   __asm__ volatile goto (""
  18             :: [a] "r" (a), [b] "r" (b), [c] "r" (c), [d] "r" (d),
  19                [e] "r" (e), [f] "r" (f), [g] "r" (g), [h] "r" (h),
  20                [i] "r" (i), [j] "r" (j), [k] "r" (k), [l] "r" (l)
  21             ::lab1,lab2);
  22 lab1: return;
  23 lab2: return;
  24 }
  25
  26 void test2(void) {
  27   __asm__ volatile goto (""
  28             :: [a] "r,m" (a), [b] "r,m" (b), [c] "r,m" (c), [d] "r,m" (d),
  29                [e] "r,m" (e), [f] "r,m" (f), [g] "r,m" (g), [h] "r,m" (h),
  30                [i] "r,m" (i), [j] "r,m" (j), [k] "r,m" (k), [l] "r,m" (l)
  31             :: lab);
  32   lab: return;
  33 }
  34
  35 int test3(int x) {
  36   __asm__ volatile goto ("decl %0; jnz %l[a]"
  37                          : "=r" (x) : "m" (x) : "memory" : a);
  38 a:
  39   return -x;
  40 }
  41
  42 int test4(int x) {
  43   int y;
  44   if (x > 42)
  45     __asm__ volatile goto ("decl %0; jnz %l[a]"
  46                            : "=r" (x), "=r" (y) : "m" (x) : "memory" : a);
  47   else
  48     __asm__ volatile goto ("decl %0; jnz %l[b]"
  49                            : "=r" (x), "=r" (y) : "m" (x) : "memory" : b);
  50   x = y + 42;
  51 a:
  52   return -x;
  53 b:
  54   return +x;
  55 }
  56
  57 int test5(void) {
  58   int x,cond,*e;
  59   // expected-error@+1 {{expected ')'}}
  60   asm ("mov %[e], %[e]" : : [e] "rm" (*e)::a)
  61   // expected-error@+1 {{expected identifier}}
  62   asm goto ("decl %0;" :: "m"(x) : "memory" : );
  63   // expected-error@+1 {{expected ':'}}
  64   asm goto ("decl %0;" :: "m"(x) : "memory" );
  65   // expected-error@+1 {{use of undeclared label 'x'}}
  66   asm goto ("decl %0;" :: "m"(x) : "memory" :x);
  67   // expected-error@+1 {{use of undeclared label 'b'}}
  68   asm goto ("decl %0;" :: "m"(x) : "memory" :b);
  69   // expected-error@+1 {{invalid operand number in inline asm string}}
  70   asm goto ("testl %0, %0; jne %l3;" :: "r"(cond)::label_true, loop);
  71   // expected-error@+1 {{unknown symbolic operand name in inline assembly string}}
  72   asm goto ("decl %0; jnz %l[b]" :: "m"(x) : "memory" : a);
  73 a:
  74 label_true:
  75 loop:
  76   return 0;
  77 }
  78
  79 int test6(int y) {
  80   int x,cond,*e;
  81   // expected-error@+1 {{expected ')'}}
  82   asm ("mov %[e], %[e]" : "=r" (y) : [e] "rm" (*e), "r" (y) :: a)
  83   // expected-error@+1 {{expected identifier}}
  84   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory" :);
  85   // expected-error@+1  {{expected ':'}}
  86   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory");
  87   // expected-error@+1 {{use of undeclared label 'x'}}
  88   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory" : x);
  89   // expected-error@+1 {{use of undeclared label 'b'}}
  90   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory" : b);
  91   // expected-error@+1 {{invalid operand number in inline asm string}}
  92   asm goto ("testl %0, %0; jne %l5;" : "=r" (y) : "r" (cond), "r" (y) :: label_true, loop);
  93   // expected-error@+1 {{unknown symbolic operand name in inline assembly string}}
  94   asm goto ("decl %0; jnz %l[b]" : "=r" (y) : "m" (x), "r" (y) : "memory" : a);
  95 label_true:
  96 loop:
  97 a:
  98   return 0;
  99 }