gcc/testsuite/gcc.dg/20020219-1.c

   1 /* PR c/4389
   2    This testcase failed because host_integerp (x, 0) was returning
   3    1 even for constants bigger than 2^31.  It fails under under hpux
   4    without -mdisable-indexing because the pointer x - 1 is used as
   5    the base address of an indexed load.  Because the struct A is not
   6    actually allocated, x - 1 lies in the text segment and this causes
   7    the wrong space register to be selected for the load.  */
   8 /* { dg-do run } */
   9 /* { dg-options "-O2" } */
  10 /* { dg-options "-O2 -mdisable-indexing" { target hppa*-*-hpux* } } */
  11
  12 /* Disable the test entirely for 16-bit targets.  */
  13 #if __INT_MAX__ > 32767
  14
  15 extern void abort (void);
  16 extern void exit (int);
  17 struct A {
  18   int a[10000][10000];
  19 };
  20 int b[2] = { 213151, 0 };
  21
  22 void foo (struct A *x, int y)
  23 {
  24   if (x->a[9999][9999] != x->a[y][y])
  25     abort ();
  26   if (x->a[9999][9999] != 213151)
  27     abort ();
  28 }
  29
  30 int main (void)
  31 {
  32   struct A *x;
  33   asm ("" : "=r" (x) : "0" (&b[1]));
  34   foo (x - 1, 9999);
  35   exit (0);
  36 }
  37
  38 #else
  39
  40 int main () { return 0; }
  41
  42 #endif /* __INT_MAX__ */