gcc/testsuite/gcc.dg/tree-ssa/split-path-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fsplit-paths -fdump-tree-split-paths-details --param max-jump-thread-duplication-stmts=20" } */
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <ctype.h>
   7
   8 #define RGBMAX 255
   9
  10 unsigned char
  11 test()
  12 {
  13   int i, Pels;
  14   int sum = 0;
  15   unsigned char xr, xg, xb;
  16   unsigned char xc, xm, xy, xk = 0;
  17   unsigned char *ReadPtr, *EritePtr;
  18
  19   ReadPtr = ( unsigned char *) malloc (sizeof (unsigned char) * 100);
  20   EritePtr = ( unsigned char *) malloc (sizeof (unsigned char) * 100);
  21
  22   for (i = 0; i < 100;i++)
  23      {
  24        ReadPtr[i] = 100 - i;
  25      }
  26
  27   for (i = 0; i < 24; i++)
  28      {
  29        xr = *ReadPtr++;
  30        xg = *ReadPtr++;
  31        xb = *ReadPtr++;
  32
  33        xc = (unsigned char) (RGBMAX - xr);
  34        xm = (unsigned char) (RGBMAX - xg);
  35        xy = (unsigned char) (RGBMAX - xb);
  36
  37        if (xc < xm)
  38          {
  39            xk = (unsigned char) (xc < xy ? xc : xy);
  40          }
  41        else
  42         {
  43           xk = (unsigned char) (xm < xy ? xm : xy);
  44         }
  45
  46        xc = (unsigned char) (xc - xk);
  47        xm = (unsigned char) (xm - xk);
  48        xy = (unsigned char) (xy - xk);
  49
  50        *EritePtr++ = xc;
  51        *EritePtr++ = xm;
  52        *EritePtr++ = xy;
  53        *EritePtr++ = xk;
  54        sum += *(--EritePtr);
  55
  56     }
  57   return sum;
  58 }
  59
  60 int
  61 main()
  62 {
  63   if (test() != 196)
  64     abort();
  65
  66   return 0;
  67 }
  68
  69 /* { dg-final { scan-tree-dump "Duplicating join block" "split-paths" } } */