gcc/testsuite/gcc.dg/cdce2.c

   1 /* { dg-do  run  } */
   2 /* { dg-skip-if "doubles are floats" { "avr-*-*" } { "*" } { "" } } */
   3 /* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details  -lm" } */
   4 /* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details" { target *-*-netware* } } */
   5 /* { dg-final { scan-tree-dump  "cdce2.c:17: note: function call is shrink-wrapped into error conditions\." "cdce" } }*/
   6 /* { dg-final { cleanup-tree-dump "cdce" } } */
   7
   8 #include <stdlib.h>
   9 #include <math.h>
  10 #include <errno.h>
  11 int total_err_count = 0;
  12 double foo_opt (double y) __attribute__((noinline));
  13 double foo_opt (double y)
  14 {
  15   double yy = 0;
  16   errno = 0;
  17   yy = log (y);
  18   return 0;
  19 }
  20
  21 double foo (double y) __attribute__((noinline));
  22 double foo (double y)
  23 {
  24   double yy = 0;
  25   errno = 0;
  26   yy = log (y);
  27   return yy;
  28 }
  29
  30 int test (double (*fp) (double y))
  31 {
  32   int i,x;
  33   for (i = -100; i < 100; i++)
  34     {
  35       fp (i);
  36       if (errno)
  37         total_err_count ++;
  38     }
  39
  40   return total_err_count;
  41 }
  42
  43 int main ()
  44 {
  45   int en1, en2;
  46   double yy;
  47   total_err_count = 0;
  48   en1 = test (foo_opt);
  49   total_err_count = 0;
  50   en2 = test (foo);
  51
  52   if (en1 != en2)
  53     abort();
  54
  55   return 0;
  56 }