gcc/testsuite/gcc.dg/pr65408.c

   1 /* PR middle-end/36043 target/58744 target/65408 */
   2 /* { dg-do run { target mmap } } */
   3 /* { dg-options "-O2" } */
   4
   5 #include <sys/mman.h>
   6 #ifndef MAP_ANONYMOUS
   7 #define MAP_ANONYMOUS MAP_ANON
   8 #endif
   9 #ifndef MAP_ANON
  10 #define MAP_ANON 0
  11 #endif
  12 #ifndef MAP_FAILED
  13 #define MAP_FAILED ((void *)-1)
  14 #endif
  15
  16 typedef struct
  17 {
  18   unsigned char r;
  19   unsigned char g;
  20   unsigned char b;
  21 } __attribute__((packed)) pr58744;
  22
  23 typedef struct
  24 {
  25   unsigned short r;
  26   unsigned short g;
  27   unsigned short b;
  28 } pr36043;
  29
  30 typedef struct
  31 {
  32   int r;
  33   int g;
  34   int b;
  35 } pr65408;
  36
  37 __attribute__ ((noinline, noclone))
  38 void
  39 f1a (pr58744 x)
  40 {
  41   if (x.r != 1 || x.g != 2 || x.b != 3)
  42     __builtin_abort();
  43 }
  44
  45 __attribute__ ((noinline, noclone))
  46 void
  47 f1 (pr58744 *x)
  48 {
  49   f1a (*x);
  50 }
  51
  52 __attribute__ ((noinline, noclone))
  53 void
  54 f2a (pr36043 x)
  55 {
  56   if (x.r != 1 || x.g != 2 || x.b != 3)
  57     __builtin_abort();
  58 }
  59
  60 __attribute__ ((noinline, noclone))
  61 void
  62 f2 (pr36043 *x)
  63 {
  64   f2a (*x);
  65 }
  66
  67 __attribute__ ((noinline, noclone))
  68 void
  69 f3a (pr65408 x)
  70 {
  71   if (x.r != 1 || x.g != 2 || x.b != 3)
  72     __builtin_abort();
  73 }
  74
  75 __attribute__ ((noinline, noclone))
  76 void
  77 f3 (pr65408 *x)
  78 {
  79   f3a (*x);
  80 }
  81
  82 int
  83 main ()
  84 {
  85   char *p = mmap ((void *) 0, 131072, PROT_READ | PROT_WRITE,
  86                   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  87   if (p == MAP_FAILED)
  88     return 0;
  89   char *endp = p + 65536;
  90   if (munmap (endp, 65536) < 0)
  91     return 0;
  92
  93   pr58744 *s1 = (pr58744 *) endp - 1;
  94   s1->r = 1;
  95   s1->g = 2;
  96   s1->b = 3;
  97   f1 (s1);
  98
  99   pr36043 *s2 = (pr36043 *) endp - 1;
 100   s2->r = 1;
 101   s2->g = 2;
 102   s2->b = 3;
 103   f2 (s2);
 104
 105   pr65408 *s3 = (pr65408 *) endp - 1;
 106   s3->r = 1;
 107   s3->g = 2;
 108   s3->b = 3;
 109   f3 (s3);
 110
 111   return 0;
 112 }