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