gcc/testsuite/gcc.target/arm/pr43698.c

   1 /* { dg-do run } */
   2 /* { dg-options "-Os" } */
   3 #include <stdint.h>
   4 #include <stdlib.h>
   5
   6
   7 char do_reverse_endian = 0;
   8
   9 #  define bswap_32(x) \
  10   ((((x) & 0xff000000) >> 24) | \
  11    (((x) & 0x00ff0000) >>  8) | \
  12    (((x) & 0x0000ff00) <<  8) | \
  13    (((x) & 0x000000ff) << 24))
  14
  15 #define EGET(X) \
  16   (__extension__ ({ \
  17       uint64_t __res; \
  18       if (!do_reverse_endian) {    __res = (X); \
  19       } else if (sizeof(X) == 4) { __res = bswap_32((X)); \
  20       } \
  21       __res; \
  22     }))
  23
  24 void __attribute__((noinline)) X(char **phdr, char **data, int *phoff)
  25 {
  26   *phdr = *data + EGET(*phoff);
  27 }
  28
  29 int main()
  30 {
  31   char *phdr;
  32   char *data = (char *)0x40164000;
  33   int phoff = 0x34;
  34   X(&phdr, &data, &phoff);
  35   if (phdr != (char *)0x40164034)
  36     abort ();
  37   exit (0);
  38 }