tests/tests2/96_nodata_wanted.c

   1 /*****************************************************************************/
   2 /* test 'nodata_wanted' data output suppression */
   3
   4 #if defined test_static_data_error
   5 void foo() {
   6     if (1) {
   7         static short w = (int)&foo; /* initializer not computable */
   8     }
   9 }
  10
  11 #elif defined test_static_nodata_error
  12 void foo() {
  13     if (0) {
  14         static short w = (int)&foo; /* initializer not computable */
  15     }
  16 }
  17
  18 #elif defined test_global_data_error
  19 void foo();
  20 static short w = (int)&foo; /* initializer not computable */
  21
  22
  23 #elif defined test_local_data_noerror
  24 void foo() {
  25     short w = &foo; /* 2 cast warnings */
  26 }
  27
  28 #elif defined test_data_suppression_off || defined test_data_suppression_on
  29
  30 #if defined test_data_suppression_on
  31 # define SKIP 1
  32 #else
  33 # define SKIP 0
  34 #endif
  35
  36 #include <stdio.h>
  37 /* some gcc headers #define __attribute__ to empty if it's not gcc */
  38 #undef __attribute__
  39
  40 int main()
  41 {
  42     __label__ ts0, te0, ts1, te1;
  43     int tl, dl;
  44
  45     static const char ds0 = 0;
  46     static const char de0 = 0;
  47     /* get reference size of empty jmp */
  48 ts0:;
  49     if (!SKIP) {}
  50 te0:;
  51     dl = -(&de0 - &ds0);
  52     tl = -(&&te0 - &&ts0);
  53
  54     /* test data and code suppression */
  55     static const char ds1 = 0;
  56 ts1:;
  57     if (!SKIP) {
  58         void *p = (void*)&main;
  59         char cc[] = "static string";
  60         double d = 8.0;
  61         struct
  62 #ifndef __arm__
  63         __attribute__((packed))
  64 #endif
  65         {
  66             unsigned x : 12;
  67             unsigned char y : 7;
  68             unsigned z : 28, a: 4, b: 5;
  69         } s = { 0x333,0x44,0x555555,6,7 };
  70
  71         printf("data:\n");
  72         printf("  %d - %.1f - %.1f - %s - %s\n",
  73             sizeof 8.0, 8.0, d, __FUNCTION__, cc);
  74         printf("  %x %x %x %x %x\n",
  75             s.x, s.y, s.z, s.a, s.b);
  76     }
  77 te1:;
  78     static const char de1 = 0;
  79
  80     dl += &de1 - &ds1;
  81     tl += &&te1 - &&ts1;
  82     printf("size of data/text:\n  %s/%s\n",
  83         dl ? "non-zero":"zero", tl ? "non-zero":"zero");
  84     /*printf("# %d/%d\n", dl, tl);*/
  85 }
  86
  87 #elif defined test_static_data
  88
  89 #include <stdio.h>
  90 int main(int argc, char **argv)
  91 {
  92     goto there;
  93     if (0) {
  94         static int a = 1;
  95         printf("hello\n"); /* the "hello\n" string is still suppressed */
  96 there:
  97         printf("a = %d\n", a);
  98     }
  99     return 0;
 100 }
 101
 102 #endif