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-*-* } && ilp32 } } } */
   8 /* { dg-require-effective-target tls } */
   9
  10 __thread int thr;
  11
  12 struct A
  13 {
  14   unsigned int a, b, c, d, e;
  15 };
  16
  17 int bar (int x, unsigned long y, void *z)
  18 {
  19   return 0;
  20 }
  21
  22 int
  23 foo (int x, int y, const struct A *z)
  24 {
  25   struct A b;
  26   int d;
  27
  28   b = *z;
  29   d = bar (x, y, &b);
  30   if (d == 0 && y == 0x5402)
  31     {
  32       int e = thr;
  33       d = bar (x, 0x5401, &b);
  34       if (d)
  35         {
  36           thr = e;
  37           d = 0;
  38         }
  39       else if ((z->c & 0600) != (b.c & 0600)
  40                || ((z->c & 060) && ((z->c & 060) != (b.c & 060))))
  41         {
  42           thr = 22;
  43           d = -1;
  44         }
  45     }
  46
  47   return d;
  48 }
  49
  50 int main (void)
  51 {
  52   foo (1, 2, 0);
  53   return 0;
  54 }