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-*-* } } */
   8
   9 __thread int thr;
  10
  11 struct A
  12 {
  13   unsigned int a, b, c, d, e;
  14 };
  15
  16 int bar (int x, unsigned long y, void *z)
  17 {
  18   return 0;
  19 }
  20
  21 int
  22 foo (int x, int y, const struct A *z)
  23 {
  24   struct A b;
  25   int d;
  26
  27   b = *z;
  28   d = bar (x, y, &b);
  29   if (d == 0 && y == 0x5402)
  30     {
  31       int e = thr;
  32       d = bar (x, 0x5401, &b);
  33       if (d)
  34         {
  35           thr = e;
  36           d = 0;
  37         }
  38       else if ((z->c & 0600) != (b.c & 0600)
  39                || ((z->c & 060) && ((z->c & 060) != (b.c & 060))))
  40         {
  41           thr = 22;
  42           d = -1;
  43         }
  44     }
  45
  46   return d;
  47 }
  48
  49 int main (void)
  50 {
  51   foo (1, 2, 0);
  52   return 0;
  53 }