gcc/testsuite/gcc.dg/pr70169.c

   1 /* PR tree-optimization/70169 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fno-strict-aliasing -fno-tree-dce" } */
   4 /* { dg-skip-if "Program and data reside in different address spaces" { "avr-*-*" } } */
   5
   6 int printf (const char *, ...);
   7
   8 void
   9 foo ()
  10 {
  11   unsigned char *p = (unsigned char *) &printf;
  12   for (;;)
  13     (*p)++;
  14 }
  15
  16 void
  17 bar (int x)
  18 {
  19   unsigned char *p = (unsigned char *) &printf;
  20   int i;
  21   for (i = 0; i < x; i++)
  22     (*p)++;
  23 }
  24
  25 void
  26 baz (int x, int y)
  27 {
  28   unsigned char *p = (unsigned char *) &&lab;
  29   int i;
  30   if (y)
  31     {
  32       for (i = 0; i < x; i++)
  33         (*p)++;
  34     }
  35   else
  36     {
  37      lab:
  38       asm volatile ("");
  39       foo ();
  40     }
  41 }