gcc/testsuite/gcc.dg/tls/opt-2.c

   1 /* This testcase generated invalid assembly on IA-32,
   2    since %gs:0 memory load was not exposed to the compiler
   3    as memory load and mem to mem moves are not possible
   4    on IA-32.  */
   5 /* { dg-do link } */
   6 /* { dg-options "-O2 -ftls-model=initial-exec" } */
   7 /* { dg-options "-O2 -ftls-model=initial-exec -march=i686" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   8 /* { dg-require-effective-target tls } */
   9 /* { dg-require-effective-target tls_runtime  } */
  10
  11 __thread int thr;
  12
  13 struct A
  14 {
  15   unsigned int a, b, c, d, e;
  16 };
  17
  18 int bar (int x, unsigned long y, void *z)
  19 {
  20   return 0;
  21 }
  22
  23 int
  24 foo (int x, int y, const struct A *z)
  25 {
  26   struct A b;
  27   int d;
  28
  29   b = *z;
  30   d = bar (x, y, &b);
  31   if (d == 0 && y == 0x5402)
  32     {
  33       int e = thr;
  34       d = bar (x, 0x5401, &b);
  35       if (d)
  36         {
  37           thr = e;
  38           d = 0;
  39         }
  40       else if ((z->c & 0600) != (b.c & 0600)
  41                || ((z->c & 060) && ((z->c & 060) != (b.c & 060))))
  42         {
  43           thr = 22;
  44           d = -1;
  45         }
  46     }
  47
  48   return d;
  49 }
  50
  51 int main (void)
  52 {
  53   foo (1, 2, 0);
  54   return 0;
  55 }