gcc/testsuite/gcc.target/i386/pic-1.c

   1 /* PR target/8340 */
   2 /* { dg-do compile } */
   3 /* { dg-require-effective-target ia32 } */
   4 /* { dg-require-effective-target fpic } */
   5 /* { dg-skip-if "No Windows PIC" { *-*-mingw* *-*-cygwin } { "*" } { "" } } */
   6 /* { dg-options "-fPIC" } */
   7
   8 /* Test verifies that %ebx is no longer fixed when generating PIC code on i686.  */
   9
  10 int foo ()
  11 {
  12   static int a;
  13
  14   __asm__ __volatile__ (
  15     "xorl %%ebx, %%ebx\n"
  16     "movl %%ebx, %0\n"
  17     : "=m" (a)
  18     :
  19     : "%ebx"
  20   );
  21
  22   return a;
  23 }