gcc/testsuite/gcc.dg/pr15784-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fstrict-overflow -fdump-tree-gimple" } */
   3 /* Test for folding abs(x) where appropriate.  */
   4 #define abs(x) x > 0 ? x : -x
   5 extern double fabs (double);
   6
   7 int a (int x) {
   8         return (abs(x)) >= 0;
   9 }
  10
  11 int b (int x) {
  12         return (abs(x)) == 0;
  13 }
  14
  15 int c (int x) {
  16         return (abs(x)) != 0;
  17 }
  18
  19 int d (int x) {
  20         return 0 != (abs(x));
  21 }
  22
  23 int e (int x) {
  24         return 0 == (abs(x));
  25 }
  26
  27 int f (int x) {
  28         return 0 <= (abs(x));
  29 }
  30
  31 int g (int x) {
  32         return 0 > (abs(x));
  33 }
  34
  35 int h (float x) {
  36         return 0.0 > fabs(x);
  37 }
  38
  39 int i (float x) {
  40         return fabs(x) == -0.0;
  41 }
  42 /* { dg-final { scan-tree-dump-times "ABS_EXPR" 0 "gimple" } } */