gcc/testsuite/gcc.dg/lto/pr88297_0.c

   1 /* { dg-require-effective-target lto } */
   2 /* { dg-lto-options { { -flto -O3 -fipa-cp -fipa-cp-clone } } } */
   3 /* { dg-lto-do run } */
   4
   5 /* In order to trigger IPA-CP cloning we have to:
   6
   7   1. Put the calls in main into a loop; otherwise everything is
   8   cold and we would not clone.
   9
  10   2. Make different foos and bars actually semantically different;
  11   otherwise IPA-ICF unified them (as it should).
  12
  13 */
  14
  15 volatile int g;
  16
  17 void __attribute__ ((noipa))
  18 use (int v)
  19 {
  20   g = v;
  21 }
  22
  23 static int __attribute__ ((noinline))
  24 foo (int arg)
  25 {
  26   return 7 * arg;
  27 }
  28
  29 static int __attribute__ ((noinline))
  30 bar (int arg)
  31 {
  32   return arg * arg;
  33 }
  34
  35 extern int __attribute__ ((noinline))
  36 entry2 (void);
  37
  38 int  __attribute__ ((noipa))
  39 get_opaque_number (void)
  40 {
  41   return 1;
  42 }
  43
  44 int main (void)
  45 {
  46   int i;
  47   for (i = 0; i < get_opaque_number (); i++)
  48     {
  49       use (bar (3));
  50       use (bar (4));
  51       use (foo (5));
  52       use (foo (6));
  53
  54       entry2 ();
  55     }
  56   return 0;
  57 }