gcc/testsuite/gcc.dg/vect/vect-over-widen-21.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-require-effective-target vect_shift } */
   3 /* { dg-require-effective-target vect_pack_trunc } */
   4 /* { dg-require-effective-target vect_unpack } */
   5
   6 #include "tree-vect.h"
   7
   8 #define N 111
   9
  10 /* This shouldn't be treated as an over-widening operation: it's better
  11    to reuse the extensions of di and ei for di + ei than to add them
  12    as shorts and introduce a third extension.  */
  13
  14 void __attribute__ ((noipa))
  15 f (unsigned int *restrict a, unsigned int *restrict b,
  16    unsigned int *restrict c, unsigned char *restrict d,
  17    unsigned char *restrict e)
  18 {
  19   for (__INTPTR_TYPE__ i = 0; i < N; ++i)
  20     {
  21       a[i] = d[i];
  22       b[i] = e[i];
  23       c[i] = d[i] + e[i];
  24     }
  25 }
  26
  27 int
  28 main (void)
  29 {
  30   check_vect ();
  31
  32   unsigned int a[N], b[N], c[N];
  33   unsigned char d[N], e[N];
  34   for (int i = 0; i < N; ++i)
  35     {
  36       d[i] = i * 2 + 3;
  37       e[i] = i + 100;
  38       asm volatile ("" ::: "memory");
  39     }
  40   f (a, b, c, d, e);
  41 #pragma GCC novector
  42   for (int i = 0; i < N; ++i)
  43     if (a[i] != i * 2 + 3
  44         || b[i] != i + 100
  45         || c[i] != i * 3 + 103)
  46       __builtin_abort ();
  47
  48   return 0;
  49 }
  50
  51 /* { dg-final { scan-tree-dump-not {vect_recog_over_widening_pattern: detected} "vect" } } */
  52 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" } } */