gcc/testsuite/gcc.dg/ipa/ipa-icf-12.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-ipa-icf"  } */
   3
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6
   7 int gcd(int x, int y) __attribute__ ((pure));
   8
   9 __attribute__ ((noinline))
  10 int gcd(int x, int y)
  11 {
  12   int swap;
  13
  14   if(x <= 0 || y <= 0)
  15     return 0;
  16
  17   if(x < y)
  18     {
  19       swap = x;
  20       x = y;
  21       y = swap;
  22     }
  23
  24   while(x != y)
  25     {
  26       x = x - y;
  27
  28       if(y > x)
  29         {
  30           swap = x;
  31           x = y;
  32           y = swap;
  33         }
  34     }
  35
  36   return x;
  37 }
  38
  39 int nsd(int x, int y) __attribute__ ((pure));
  40
  41 __attribute__ ((noinline))
  42 int nsd(int x, int y)
  43 {
  44   int swap;
  45
  46   if(x <= 0 || y <= 0)
  47     return 0;
  48
  49   if(x < y)
  50     {
  51       swap = x;
  52       x = y;
  53       y = swap;
  54     }
  55
  56   while(x != y)
  57     {
  58       x = x - y;
  59
  60       if(y > x)
  61         {
  62           swap = x;
  63           x = y;
  64           y = swap;
  65         }
  66     }
  67
  68   return x;
  69 }
  70
  71 int main(int argc, char **argv)
  72 {
  73   return 0;
  74 }
  75
  76 /* { dg-final { scan-ipa-dump "Semantic equality hit:nsd->gcd" "icf"  } } */
  77 /* { dg-final { scan-ipa-dump "Equal symbols: 1" "icf"  } } */
  78 /* { dg-final { cleanup-ipa-dump "icf" } } */