gcc/testsuite/gcc.dg/pr78468.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target alloca } */
   3 /* { dg-options "-O2 -fno-inline" } */
   4
   5 /* Test that targets correctly round the size of the outgoing arguments
   6    to a multiple of STACK_BOUNDARY.  There is a serious alignment bug if
   7    aligned alloca does not get aligned!  */
   8
   9 __extension__ typedef __UINTPTR_TYPE__ uintptr_t;
  10 extern void abort (void);
  11
  12 volatile int xx;
  13 volatile int x = 16;
  14
  15 void
  16 t1 (int x0, int x1, int x2, int x3, int x4, int x5, int x6, int x7,
  17     void *p, int align)
  18 {
  19   xx = x0 + x1 + x2 + x3 + x4 + x4 + x6 + x7;
  20   if ((int)(uintptr_t)p & (align-1))
  21     abort ();
  22 }
  23
  24 void
  25 t2 (int x0, int x1, int x2, int x3, int x4, int x5, int x6, int x7,
  26     void *p, int align, int dummy)
  27 {
  28   xx = x0 + x1 + x2 + x3 + x4 + x4 + x6 + x7;
  29   if ((int)(uintptr_t)p & (align-1))
  30     abort ();
  31 }
  32
  33 void
  34 t1_a4 (int size)
  35 {
  36   void *p = __builtin_alloca_with_align (size, 32);
  37   t1 (0, 0, 0, 0, 0, 0, 0, 0, p, 4);
  38 }
  39
  40 void
  41 t2_a4 (int size)
  42 {
  43   void *p = __builtin_alloca_with_align (size, 32);
  44   t2 (0, 0, 0, 0, 0, 0, 0, 0, p, 4, 0);
  45 }
  46
  47 void
  48 t1_a8 (int size)
  49 {
  50   void *p = __builtin_alloca_with_align (size, 64);
  51   t1 (0, 0, 0, 0, 0, 0, 0, 0, p, 8);
  52 }
  53
  54 void
  55 t2_a8 (int size)
  56 {
  57   void *p = __builtin_alloca_with_align (size, 64);
  58   t2 (0, 0, 0, 0, 0, 0, 0, 0, p, 8, 0);
  59 }
  60
  61 void
  62 t1_a16 (int size)
  63 {
  64   void *p = __builtin_alloca_with_align (size, 128);
  65   t1 (0, 0, 0, 0, 0, 0, 0, 0, p, 16);
  66 }
  67
  68 void
  69 t2_a16 (int size)
  70 {
  71   void *p = __builtin_alloca_with_align (size, 128);
  72   t2 (0, 0, 0, 0, 0, 0, 0, 0, p, 16, 0);
  73 }
  74
  75 void
  76 t1_a32 (int size)
  77 {
  78   void *p = __builtin_alloca_with_align (size, 256);
  79   t1 (0, 0, 0, 0, 0, 0, 0, 0, p, 32);
  80 }
  81
  82 void
  83 t2_a32 (int size)
  84 {
  85   void *p = __builtin_alloca_with_align (size, 256);
  86   t2 (0, 0, 0, 0, 0, 0, 0, 0, p, 32, 0);
  87 }
  88
  89
  90 int
  91 main ()
  92 {
  93   t1_a4 (x);
  94   t2_a4 (x);
  95   t1_a8 (x);
  96   t2_a8 (x);
  97   t1_a16 (x);
  98   t2_a16 (x);
  99   t1_a32 (x);
 100   t2_a32 (x);
 101   return 0;
 102 }