gcc/testsuite/gcc.dg/vect/pr103116-1.c

   1 /* { dg-require-effective-target mmap } */
   2
   3 #include <sys/mman.h>
   4 #include <stdio.h>
   5
   6 #define COUNT 128
   7 #define MMAP_SIZE 0x20000
   8 #define ADDRESS 0x1122000000
   9 #define TYPE unsigned int
  10
  11 #ifndef MAP_ANONYMOUS
  12 #define MAP_ANONYMOUS MAP_ANON
  13 #endif
  14
  15 void __attribute__((noipa))
  16 loop (TYPE *restrict x, TYPE *restrict y)
  17 {
  18   for (int i = 0; i < COUNT; ++i)
  19     {
  20       x[i * 4] = y[i * 2] + 1;
  21       x[i * 4 + 1] = y[i * 2] + 2;
  22       x[i * 4 + 2] = y[i * 2 + 1] + 3;
  23       x[i * 4 + 3] = y[i * 2 + 1] + 4;
  24     }
  25 }
  26
  27 TYPE x[COUNT * 4];
  28
  29 int
  30 main (void)
  31 {
  32   void *y;
  33   TYPE *end_y;
  34
  35   y = mmap ((void *) ADDRESS, MMAP_SIZE, PROT_READ | PROT_WRITE,
  36             MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  37   if (y == MAP_FAILED)
  38     {
  39       perror ("mmap");
  40       return 1;
  41     }
  42
  43   end_y = (TYPE *) ((char *) y + MMAP_SIZE);
  44
  45   loop (x, end_y - COUNT * 2);
  46
  47   return 0;
  48 }
  49
  50 /* When the target can compose a vector from its half we do not require
  51    a scalar epilogue, but there's no effective target for this.  */
  52 /* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" { target { vect_perm && vect_int } } } } */