gcc/testsuite/gcc.dg/optimize-bswapdi-3.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target bswap64 } */
   3 /* { dg-require-effective-target stdint_types } */
   4 /* { dg-options "-O2 -fdump-tree-bswap" } */
   5
   6 #include <stdint.h>
   7
   8 unsigned char data[8];
   9
  10 struct uint64_st {
  11   unsigned char u0, u1, u2, u3, u4, u5, u6, u7;
  12 };
  13
  14 uint64_t read_le64_1 (void)
  15 {
  16   return (uint64_t) data[0] | ((uint64_t) data[1] << 8)
  17          | ((uint64_t) data[2] << 16) | ((uint64_t) data[3] << 24)
  18          | ((uint64_t) data[4] << 32) | ((uint64_t) data[5] << 40)
  19          | ((uint64_t) data[6] << 48) | ((uint64_t) data[7] << 56);
  20 }
  21
  22 uint64_t read_le64_2 (struct uint64_st data)
  23 {
  24   return (uint64_t) data.u0 | ((uint64_t) data.u1 << 8)
  25          | ((uint64_t) data.u2 << 16) | ((uint64_t) data.u3 << 24)
  26          | ((uint64_t) data.u4 << 32) | ((uint64_t) data.u5 << 40)
  27          | ((uint64_t) data.u6 << 48) | ((uint64_t) data.u7 << 56);
  28 }
  29
  30 uint64_t read_le64_3 (unsigned char *data)
  31 {
  32   return (uint64_t) *data | ((uint64_t) *(data + 1) << 8)
  33          | ((uint64_t) *(data + 2) << 16) | ((uint64_t) *(data + 3) << 24)
  34          | ((uint64_t) *(data + 4) << 32) | ((uint64_t) *(data + 5) << 40)
  35          | ((uint64_t) *(data + 6) << 48) | ((uint64_t) *(data + 7) << 56);
  36 }
  37
  38 uint64_t read_be64_1 (void)
  39 {
  40   return (uint64_t) data[7] | ((uint64_t) data[6] << 8)
  41          | ((uint64_t) data[5] << 16) | ((uint64_t) data[4] << 24)
  42          | ((uint64_t) data[3] << 32) | ((uint64_t) data[2] << 40)
  43          | ((uint64_t) data[1] << 48) | ((uint64_t) data[0] << 56);
  44 }
  45
  46 uint64_t read_be64_2 (struct uint64_st data)
  47 {
  48   return (uint64_t) data.u7 | ((uint64_t) data.u6 << 8)
  49          | ((uint64_t) data.u5 << 16) | ((uint64_t) data.u4 << 24)
  50          | ((uint64_t) data.u3 << 32) | ((uint64_t) data.u2 << 40)
  51          | ((uint64_t) data.u1 << 48) | ((uint64_t) data.u0 << 56);
  52 }
  53
  54 uint64_t read_be64_3 (unsigned char *data)
  55 {
  56   return (uint64_t) *(data + 7) | ((uint64_t) *(data + 6) << 8)
  57          | ((uint64_t) *(data + 5) << 16) | ((uint64_t) *(data + 4) << 24)
  58          | ((uint64_t) *(data + 3) << 32) | ((uint64_t) *(data + 2) << 40)
  59          | ((uint64_t) *(data + 1) << 48) | ((uint64_t) *data << 56);
  60 }
  61
  62 /* { dg-final { scan-tree-dump-times "64 bit load in target endianness found at" 3 "bswap" } } */
  63 /* { dg-final { scan-tree-dump-times "64 bit bswap implementation found at" 3 "bswap" { xfail alpha*-*-* arm*-*-* } } } */