gcc/testsuite/gcc.dg/tls/opt-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-require-effective-target tls_native } */
   4
   5 struct A
   6 {
   7   int a1;
   8   int a2;
   9 };
  10
  11 extern __thread const unsigned char *tcc1, **tcc2;
  12
  13 extern inline const unsigned char ** __attribute__ ((const))
  14 foo (void)
  15 {
  16   const unsigned char **a = &tcc1;
  17   if (*a == 0)
  18     *a = *tcc2 + 128;
  19   return a;
  20 }
  21
  22 extern inline int
  23 bar (const struct A *x)
  24 {
  25   int a;
  26
  27   if (x->a2 & 8)
  28     return 0;
  29   a = x->a1;
  30   return a > 0 && ((*foo ())[a] & 64);
  31 }
  32
  33 int
  34 baz (const struct A *x, char *y)
  35 {
  36   const struct A *a;
  37
  38   for (a = x; !!a->a1; a++)
  39     if (! (x->a2 & 8))
  40       if (bar (a))
  41         {
  42           *y++ = a->a1;
  43           if (x->a1)
  44             *y++ = ':';
  45           *y = '\0';
  46         }
  47   return 0;
  48 }
  49
  50 /* Verify tcc1 and tcc2 variables show up only in the TLS access sequences.  */
  51 /* { dg-final { scan-assembler "tcc1@" { target i?86-*-* x86_64-*-* } } } */
  52 /* { dg-final { scan-assembler "tcc2@" { target i?86-*-* x86_64-*-* } } } */
  53 /* { dg-final { scan-assembler-not "tcc1\[^@\]" { target i?86-*-* x86_64-*-* } } } */
  54 /* { dg-final { scan-assembler-not "tcc2\[^@\]" { target i?86-*-* x86_64-*-* } } } */