gcc/testsuite/gcc.dg/i386-signbit-1.c

   1 /* PR optimization/8746 */
   2 /* { dg-do run { target i?86-*-* } } */
   3 /* { dg-skip-if "" { i?86-*-* } { "-m64" } { "" } } */
   4 /* { dg-options "-O1 -mtune=i586" } */
   5
   6 extern void abort (void);
   7
   8 unsigned char r0;
   9
  10 int foo(int x)
  11 {
  12   unsigned char r = x&0xf0;
  13
  14   if (!(r&0x80))
  15   {
  16     r0 = r;
  17     return 0;
  18   }
  19   else
  20     return 1;
  21 }
  22
  23 int main(void)
  24 {
  25   if (foo(0x80) != 1)
  26     abort();
  27
  28    return 0;
  29 }