gcc/testsuite/gcc.dg/tree-ssa/backprop-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -g -fdump-tree-backprop-details" }  */
   3
   4 /* Test a loop that does both a multiplication and addition.  The addition
   5    should prevent any sign ops from being removed.  */
   6 #define TEST_FUNCTION(TYPE, SUFFIX)                     \
   7   TYPE                                                  \
   8   test##SUFFIX (TYPE x, TYPE y, TYPE *array, int n)     \
   9   {                                                     \
  10     x = __builtin_copysign##SUFFIX (x, y);              \
  11     for (int i = 0; i < n; ++i)                         \
  12       x = (x + 1) * array[i];                           \
  13     return __builtin_hypot##SUFFIX (x, y);              \
  14   }
  15
  16 TEST_FUNCTION (float, f)
  17 TEST_FUNCTION (double, )
  18 TEST_FUNCTION (long double, l)
  19
  20 /* { dg-final { scan-tree-dump-times {Deleting[^\n]* = __builtin_copysign} 0 "backprop" } } */