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

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target bswap } */
   3 /* { dg-require-effective-target stdint_types } */
   4 /* { dg-options "-O2 -fdump-tree-bswap" } */
   5 /* { dg-additional-options "-mzarch" { target s390*-*-* } } */
   6
   7 #include <stdint.h>
   8
   9 unsigned char data[8];
  10
  11 struct uint64_st {
  12   unsigned char u0, u1, u2, u3, u4, u5, u6, u7;
  13 };
  14
  15 uint64_t read_le64_1 (void)
  16 {
  17   return (uint64_t) data[0] | ((uint64_t) data[1] << 8)
  18          | ((uint64_t) data[2] << 16) | ((uint64_t) data[3] << 24)
  19          | ((uint64_t) data[4] << 32) | ((uint64_t) data[5] << 40)
  20          | ((uint64_t) data[6] << 48) | ((uint64_t) data[7] << 56);
  21 }
  22
  23 uint64_t read_le64_2 (struct uint64_st data)
  24 {
  25   return (uint64_t) data.u0 | ((uint64_t) data.u1 << 8)
  26          | ((uint64_t) data.u2 << 16) | ((uint64_t) data.u3 << 24)
  27          | ((uint64_t) data.u4 << 32) | ((uint64_t) data.u5 << 40)
  28          | ((uint64_t) data.u6 << 48) | ((uint64_t) data.u7 << 56);
  29 }
  30
  31 uint64_t read_le64_3 (unsigned char *data)
  32 {
  33   return (uint64_t) *data | ((uint64_t) *(data + 1) << 8)
  34          | ((uint64_t) *(data + 2) << 16) | ((uint64_t) *(data + 3) << 24)
  35          | ((uint64_t) *(data + 4) << 32) | ((uint64_t) *(data + 5) << 40)
  36          | ((uint64_t) *(data + 6) << 48) | ((uint64_t) *(data + 7) << 56);
  37 }
  38
  39 uint64_t read_be64_1 (void)
  40 {
  41   return (uint64_t) data[7] | ((uint64_t) data[6] << 8)
  42          | ((uint64_t) data[5] << 16) | ((uint64_t) data[4] << 24)
  43          | ((uint64_t) data[3] << 32) | ((uint64_t) data[2] << 40)
  44          | ((uint64_t) data[1] << 48) | ((uint64_t) data[0] << 56);
  45 }
  46
  47 uint64_t read_be64_2 (struct uint64_st data)
  48 {
  49   return (uint64_t) data.u7 | ((uint64_t) data.u6 << 8)
  50          | ((uint64_t) data.u5 << 16) | ((uint64_t) data.u4 << 24)
  51          | ((uint64_t) data.u3 << 32) | ((uint64_t) data.u2 << 40)
  52          | ((uint64_t) data.u1 << 48) | ((uint64_t) data.u0 << 56);
  53 }
  54
  55 uint64_t read_be64_3 (unsigned char *data)
  56 {
  57   return (uint64_t) *(data + 7) | ((uint64_t) *(data + 6) << 8)
  58          | ((uint64_t) *(data + 5) << 16) | ((uint64_t) *(data + 4) << 24)
  59          | ((uint64_t) *(data + 3) << 32) | ((uint64_t) *(data + 2) << 40)
  60          | ((uint64_t) *(data + 1) << 48) | ((uint64_t) *data << 56);
  61 }
  62
  63 /* { dg-final { scan-tree-dump-times "64 bit load in target endianness found at" 3 "bswap" } } */
  64 /* { dg-final { scan-tree-dump-times "64 bit bswap implementation found at" 3 "bswap" } } */