gcc/testsuite/gcc.dg/20020517-1.c

   1 /* This testcase caused ICE in do_SUBST on IA-32, because 0xf6 constant
   2    was not sign-extended for QImode.  */
   3 /* { dg-do run } */
   4 /* { dg-options "-O2" } */
   5 /* { dg-options "-O2 -mtune=i686" { target { i?86-*-* && ilp32 } } } */
   6 /* { dg-options "-O2 -mtune=i686" { target { x86_64-*-* && ilp32 } } } */
   7
   8 #include <limits.h>
   9
  10 void abort (void);
  11 void exit (int);
  12
  13 void foo (void)
  14 {
  15   int i;
  16   char *p;
  17
  18   p = (char *) &i;
  19   *p = -10;
  20   if (* (unsigned char *) p != 0x100 - 10)
  21     abort ();
  22 }
  23
  24 int main (void)
  25 {
  26   if (UCHAR_MAX == 255)
  27     foo ();
  28   exit (0);
  29 }