gcc/testsuite/gcc.dg/vect/vect-early-break_69.c

   1 /* { dg-add-options vect_early_break } */
   2 /* { dg-require-effective-target vect_early_break_hw } */
   3 /* { dg-require-effective-target vect_int } */
   4
   5 #include <limits.h>
   6 #include <assert.h>
   7
   8 #include "tree-vect.h"
   9
  10 #  define BITSIZEOF_INT 32
  11 #  define BITSIZEOF_LONG 64
  12 #  define BITSIZEOF_LONG_LONG 64
  13
  14 #define MAKE_FUNS(suffix, type)                                         \
  15 int my_ffs##suffix(type x) {                                            \
  16     int i;                                                              \
  17     if (x == 0)                                                         \
  18          return 0;                                                      \
  19     for (i = 0; i < CHAR_BIT * sizeof (type); i++)                      \
  20         if (x & ((type) 1  << i))                                       \
  21             break;                                                      \
  22     return i + 1;                                                       \
  23 }                                                                       \
  24                                                                         \
  25 int my_clz##suffix(type x) {                                            \
  26     int i;                                                              \
  27     for (i = 0; i < CHAR_BIT * sizeof (type); i++)                      \
  28         if (x & ((type) 1 << ((CHAR_BIT * sizeof (type)) - i - 1)))     \
  29             break;                                                      \
  30     return i;                                                           \
  31 }
  32
  33
  34 MAKE_FUNS (, unsigned);
  35
  36 extern void abort (void);
  37 extern void exit (int);
  38
  39 #define NUMS32                                  \
  40   {                                             \
  41     0x00000000UL,                               \
  42     0x00000001UL,                               \
  43     0x80000000UL,                               \
  44     0x00000002UL,                               \
  45     0x40000000UL,                               \
  46     0x00010000UL,                               \
  47     0x00008000UL,                               \
  48     0xa5a5a5a5UL,                               \
  49     0x5a5a5a5aUL,                               \
  50     0xcafe0000UL,                               \
  51     0x00cafe00UL,                               \
  52     0x0000cafeUL,                               \
  53     0xffffffffUL                                \
  54   }
  55
  56
  57 unsigned int ints[] = NUMS32;
  58
  59 #define N(table) (sizeof (table) / sizeof (table[0]))
  60
  61 int
  62 main (void)
  63 {
  64   int i;
  65
  66   check_vect ();
  67
  68   for (i = 0; i < N(ints); i++)
  69     {
  70       if (__builtin_ffs (ints[i]) != my_ffs (ints[i]))
  71         abort ();
  72       if (ints[i] != 0
  73           && __builtin_clz (ints[i]) != my_clz (ints[i]))
  74         abort ();
  75     }
  76
  77   exit (0);
  78 }
  79
  80 /* { dg-final { scan-tree-dump "LOOP VECTORIZED" "vect" { target { ! "x86_64-*-* i?86-*-*" } } } } */