gcc/testsuite/gcc.dg/tree-ssa/minmax-16.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O -fdump-tree-phiopt -fdump-tree-optimized -g" } */
   3
   4 #include <stdint.h>
   5
   6 __attribute__ ((noipa, noinline))
   7 uint8_t three_min (uint8_t xc, uint8_t xm, uint8_t xy) {
   8         uint8_t  xk;
   9     if (xc < xm) {
  10         xk = (uint8_t) (xc < xy ? xc : xy);
  11     } else {
  12         xk = (uint8_t) (xm < xy ? xm : xy);
  13     }
  14     return xk;
  15 }
  16
  17 int
  18 main (void)
  19 {
  20   volatile uint8_t xy = 255;
  21   volatile uint8_t xm = 0;
  22   volatile uint8_t xc = 127;
  23   if (three_min (xc, xm, xy) != 0)
  24     __builtin_abort ();
  25   return 0;
  26 }
  27
  28 /* After phiopt1, will be only 2 MIN_EXPR in the IR (including debug statements). */
  29 /* xk will only have the final result so the extra debug info does not change anything. */
  30 /* { dg-final { scan-tree-dump-times "MIN_EXPR" 2 "phiopt1" } } */
  31 /* { dg-final { scan-tree-dump-times "MIN_EXPR" 2 "optimized" } } */
  32 /* { dg-final { scan-tree-dump-times "MAX_EXPR" 0 "phiopt1" } } */