clang/test/Parser/asm-goto.cpp

   1 // RUN: %clang_cc1 -triple i386-pc-linux-gnu -fsyntax-only -verify -std=c++11 %s
   2 // RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -fsyntax-only -verify -std=c++11 %s
   3
   4 int a, b, c, d, e, f, g, h, i, j, k, l;
   5
   6 void test1(void) {
   7   __asm__ volatile goto (""
   8             :: [a] "r" (a), [b] "r" (b), [c] "r" (c), [d] "r" (d),
   9                [e] "r" (e), [f] "r" (f), [g] "r" (g), [h] "r" (h),
  10                [i] "r" (i), [j] "r" (j), [k] "r" (k), [l] "r" (l)
  11             ::lab1,lab2);
  12 lab1: return;
  13 lab2: return;
  14 }
  15
  16 void test2(void) {
  17   __asm__ volatile goto (""
  18             :: [a] "r,m" (a), [b] "r,m" (b), [c] "r,m" (c), [d] "r,m" (d),
  19                [e] "r,m" (e), [f] "r,m" (f), [g] "r,m" (g), [h] "r,m" (h),
  20                [i] "r,m" (i), [j] "r,m" (j), [k] "r,m" (k), [l] "r,m" (l)
  21             :: lab);
  22   lab: return;
  23 }
  24
  25 int test3(int x) {
  26   __asm__ volatile goto ("decl %0; jnz %l[a]"
  27                          : "=r" (x) : "m" (x) : "memory" : a);
  28 a:
  29   return -x;
  30 }
  31
  32 int test4(int x) {
  33   int y;
  34   if (x > 42)
  35     __asm__ volatile goto ("decl %0; jnz %l[a]"
  36                            : "=r" (x), "=r" (y) : "m" (x) : "memory" : a);
  37   else
  38     __asm__ volatile goto ("decl %0; jnz %l[b]"
  39                            : "=r" (x), "=r" (y) : "m" (x) : "memory" : b);
  40   x = y + 42;
  41 a:
  42   return -x;
  43 b:
  44   return +x;
  45 }
  46
  47 int test5(void) {
  48   int x,cond,*e;
  49   // expected-error@+1 {{expected ')'}}
  50   asm ("mov %[e], %[e]" : : [e] "rm" (*e)::a)
  51   // expected-error@+1 {{expected identifier}}
  52   asm goto ("decl %0;" :: "m"(x) : "memory" : );
  53   // expected-error@+1  {{expected ':'}}
  54   asm goto ("decl %0;" :: "m"(x) : "memory" );
  55   // expected-error@+1 {{use of undeclared label 'x'}}
  56   asm goto ("decl %0;" :: "m"(x) : "memory" :x);
  57   // expected-error@+1 {{use of undeclared label 'b'}}
  58   asm goto ("decl %0;" :: "m"(x) : "memory" :b);
  59   // expected-error@+1 {{invalid operand number in inline asm string}}
  60   asm goto ("testl %0, %0; jne %l3;" :: "r"(cond)::label_true, loop);
  61   // expected-error@+1 {{unknown symbolic operand name in inline assembly string}}
  62   asm goto ("decl %0; jnz %l[b]" :: "m"(x) : "memory" : a);
  63 label_true:
  64 loop:
  65 a:
  66   return 0;
  67 }
  68
  69 int test6(int y) {
  70   int x,cond,*e;
  71   // expected-error@+1 {{expected ')'}}
  72   asm ("mov %[e], %[e]" : "=r" (y) : [e] "rm" (*e), "r" (y) :: a)
  73   // expected-error@+1 {{expected identifier}}
  74   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory" :);
  75   // expected-error@+1  {{expected ':'}}
  76   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory");
  77   // expected-error@+1 {{use of undeclared label 'x'}}
  78   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory" : x);
  79   // expected-error@+1 {{use of undeclared label 'b'}}
  80   asm goto ("decl %0;" : "=r" (y) : "m" (x), "r" (y) : "memory" : b);
  81   // expected-error@+1 {{invalid operand number in inline asm string}}
  82   asm goto ("testl %0, %0; jne %l5;" : "=r" (y) : "r" (cond), "r" (y) :: label_true, loop);
  83   // expected-error@+1 {{unknown symbolic operand name in inline assembly string}}
  84   asm goto ("decl %0; jnz %l[b]" : "=r" (y) : "m" (x), "r" (y) : "memory" : a);
  85 label_true:
  86 loop:
  87 a:
  88   return 0;
  89 }