gcc/testsuite/gcc.dg/pr47893.c

   1 /* PR middle-end/47893 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4 /* { dg-options "-O2 -mtune=atom -fno-omit-frame-pointer -fno-strict-aliasing" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */
   5 /* { dg-skip-if "Too much RAM needed" { "avr-*-*" } { "*" } { "" } } */
   6
   7 extern void abort (void);
   8
   9 struct S
  10 {
  11   unsigned s1:4, s2:2, s3:2, s4:2, s5:2, s6:1, s7:1, s8:1, s9:1, s10:1;
  12   int s11:16; unsigned s12:4; int s13:16; unsigned s14:2;
  13   int s15:16; unsigned s16:4; int s17:16; unsigned s18:2;
  14 };
  15
  16 struct T
  17 {
  18   unsigned t[3];
  19 };
  20
  21 struct U
  22 {
  23   unsigned u1, u2;
  24 };
  25
  26 struct V;
  27
  28 struct W
  29 {
  30   char w1[24]; struct V *w2; unsigned w3; char w4[28912];
  31   unsigned int w5; char w6[60];
  32 };
  33
  34 struct X
  35 {
  36   unsigned int x[2];
  37 };
  38
  39 struct V
  40 {
  41   int v1;
  42   struct X v2[3];
  43   char v3[28];
  44 };
  45
  46 struct Y
  47 {
  48   void *y1;
  49   char y2[3076];
  50   struct T y3[32];
  51   char y4[1052];
  52 };
  53
  54 volatile struct S v1 = { .s15 = -1, .s16 = 15, .s17 = -1, .s18 = 3 };
  55
  56 __attribute__ ((noinline, noclone))
  57 int
  58 fn1 (int x)
  59 {
  60   int r;
  61   __asm__ volatile ("" : "=r" (r) : "0" (1), "r" (x) : "memory");
  62   return r;
  63 }
  64
  65 volatile int cnt;
  66
  67 __attribute__ ((noinline, noclone))
  68 #ifdef __i386__
  69 __attribute__ ((regparm (2)))
  70 #endif
  71 struct S
  72 fn2 (struct Y *x, const struct X *y)
  73 {
  74   if (++cnt > 1)
  75     abort ();
  76   __asm__ volatile ("" : : "r" (x), "r" (y) : "memory");
  77   return v1;
  78 }
  79
  80 __attribute__ ((noinline, noclone))
  81 void fn3 (void *x, unsigned y, const struct S *z, unsigned w)
  82 {
  83   __asm__ volatile ("" : : "r" (x), "r" (y), "r" (z), "r" (w) : "memory");
  84 }
  85
  86 volatile struct U v2;
  87
  88 __attribute__ ((noinline, noclone))
  89 struct U
  90 fn4 (void *x, unsigned y)
  91 {
  92   __asm__ volatile ("" : : "r" (x), "r" (y) : "memory");
  93   return v2;
  94 }
  95
  96 __attribute__ ((noinline, noclone))
  97 struct S
  98 fn5 (void *x)
  99 {
 100   __asm__ volatile ("" : : "r" (x) : "memory");
 101   return v1;
 102 }
 103
 104 volatile struct T v3;
 105
 106 __attribute__ ((noinline, noclone))
 107 struct T fn6 (void *x)
 108 {
 109   __asm__ volatile ("" : : "r" (x) : "memory");
 110   return v3;
 111 }
 112
 113 __attribute__ ((noinline, noclone))
 114 struct T fn7 (void *x, unsigned y, unsigned z)
 115 {
 116   __asm__ volatile ("" : : "r" (x), "r" (y), "r" (z) : "memory");
 117   return v3;
 118 }
 119
 120 static void
 121 fn8 (struct Y *x, const struct V *y)
 122 {
 123   void *a = x->y1;
 124   struct S b[4];
 125   unsigned i, c;
 126   c = fn1 (y->v1);
 127   for (i = 0; i < c; i++)
 128     b[i] = fn2 (x, &y->v2[i]);
 129   fn3 (a, y->v1, b, c);
 130 }
 131
 132 static inline void
 133 fn9 (void *x, struct S y __attribute__((unused)))
 134 {
 135   fn4 (x, 8);
 136 }
 137
 138 static void
 139 fn10 (struct Y *x)
 140 {
 141   void *a = x->y1;
 142   struct T b __attribute__((unused)) = fn6 (a);
 143   fn9 (a, fn5 (a));
 144 }
 145
 146 __attribute__((noinline, noclone))
 147 int
 148 fn11 (unsigned int x, void *y, const struct W *z,
 149       unsigned int w, const char *v, const char *u)
 150 {
 151   struct Y a, *t;
 152   unsigned i;
 153   t = &a;
 154   __builtin_memset (t, 0, sizeof *t);
 155   t->y1 = y;
 156   if (x == 0)
 157     {
 158       if (z->w3 & 1)
 159         fn10 (t);
 160       for (i = 0; i < w; i++)
 161         {
 162           if (v[i] == 0)
 163             t->y3[i] = fn7 (y, 0, u[i]);
 164           else
 165             return 0;
 166         }
 167     }
 168   else
 169     for (i = 0; i < w; i++)
 170       t->y3[i] = fn7 (y, v[i], u[i]);
 171   for (i = 0; i < z->w5; i++)
 172     fn8 (t, &z->w2[i]);
 173   return 0;
 174 }
 175
 176 volatile int i;
 177 const char *volatile p = "";
 178
 179 int
 180 main ()
 181 {
 182   struct V v = { .v1 = 0 };
 183   struct W w = { .w5 = 1, .w2 = &v };
 184   fn11 (i + 1, (void *) p, &w, i, (const char *) p, (const char *) p);
 185   if (cnt != 1)
 186     abort ();
 187   return 0;
 188 }