gcc/testsuite/gcc.dg/20040302-1.c

   1 /* PR optimization/12419 */
   2 /* Ensure external_const_array[0] is read just once.  */
   3 /* { dg-do compile { target i?86-*-linux* x86_64-*-linux* } } */
   4 /* { dg-options "-O2" } */
   5 /* { dg-final { scan-assembler "external_const_array" } } */
   6 /* { dg-final { scan-assembler-not "external_const_array.*add\[^\\n\]*external_const_array" } } */
   7
   8 extern const int external_const_array [];
   9 extern void foo (void);
  10
  11 int
  12 bar (void)
  13 {
  14   int n = external_const_array[0];
  15   foo ();
  16   n += external_const_array[0];
  17   return n;
  18 }