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 hppa
   4    hpux without -mdisable-indexing because the pointer x - 1 is used
   5    as 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.  It fails on
   8    IA64 hpux in ILP32 mode because extending x - 1 before adding the
   9    array offset gives a different answer then adding first and then
  10    extending.  The underlying problem is the same as with hppa, x - 1 is
  11    not a legal data address.  It also fails on x32 targets for the
  12    same reason.  */
  13 /* { dg-do run } */
  14 /* { dg-options "-O2" } */
  15 /* { dg-options "-O2 -mdisable-indexing" { target hppa*-*-hpux* } } */
  16 /* { dg-skip-if "" { aarch64*-*-* && ilp32 } { "*" } { "" } } */
  17 /* { dg-skip-if "" { "ia64-*-hpux*" } "*" "-mlp64" } */
  18 /* { dg-skip-if "" { { i?86-*-* x86_64-*-* } && x32 } { "*" } { "" } } */
  19
  20 /* Disable the test entirely for 16-bit targets.  */
  21 #if __INT_MAX__ > 32767
  22
  23 extern void abort (void);
  24 extern void exit (int);
  25 struct A {
  26   int a[10000][10000];
  27 };
  28 int b[2] = { 213151, 0 };
  29
  30 void foo (struct A *x, int y)
  31 {
  32   if (x->a[9999][9999] != x->a[y][y])
  33     abort ();
  34   if (x->a[9999][9999] != 213151)
  35     abort ();
  36 }
  37
  38 int main (void)
  39 {
  40   struct A *x;
  41   asm ("" : "=r" (x) : "0" (&b[1]));
  42   foo (x - 1, 9999);
  43   exit (0);
  44 }
  45
  46 #else
  47
  48 int main () { return 0; }
  49
  50 #endif /* __INT_MAX__ */