gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-12.c

   1 /* PR tree-optimization/79327 - wrong code at -O2 and -fprintf-return-value
   2    { dg-do compile }
   3    { dg-options "-O2 -Wall -Wformat-overflow=1 -ftrack-macro-expansion=0" }
   4    { dg-require-effective-target int32plus } */
   5
   6 typedef __SIZE_TYPE__  size_t;
   7 typedef __WCHAR_TYPE__ wchar_t;
   8
   9 #define INT_MAX __INT_MAX__
  10 #define INT_MIN (-INT_MAX - 1)
  11
  12 /* When debugging, define LINE to the line number of the test case to exercise
  13    and avoid exercising any of the others.  The buffer and objsize macros
  14    below make use of LINE to avoid warnings for other lines.  */
  15 #ifndef LINE
  16 # define LINE 0
  17 #endif
  18
  19 void sink (char*, char*);
  20
  21 int dummy_sprintf (char*, const char*, ...);
  22
  23 char buffer [256];
  24 extern char *ptr;
  25
  26 static int int_range (int min, int max)
  27 {
  28   extern int int_value (void);
  29   int n = int_value ();
  30   return n < min || max < n ? min : n;
  31 }
  32
  33 static unsigned uint_range (unsigned min, unsigned max)
  34 {
  35   extern unsigned uint_value (void);
  36   unsigned n = uint_value ();
  37   return n < min || max < n ? min : n;
  38 }
  39
  40 /* Evaluate to an array of SIZE characters when non-negative, or to
  41    a pointer to an unknown object otherwise.  */
  42 #define buffer(size)                                    \
  43   ((0 <= size) ? buffer + sizeof buffer - (size) : ptr)
  44
  45 /* Helper to expand function to either __builtin_f or dummy_f to
  46    make debugging GCC easy.  */
  47 #define FUNC(f)                                                 \
  48   ((!LINE || LINE == __LINE__) ? __builtin_ ## f : dummy_ ## f)
  49
  50 /* Macro to verify that calls to __builtin_sprintf (i.e., with no size
  51    argument) issue diagnostics by correctly determining the size of
  52    the destination buffer.  */
  53 #define T(size, ...)                                            \
  54   (FUNC (sprintf) (buffer (size),  __VA_ARGS__),                \
  55    sink (buffer, ptr))
  56
  57 /* Return a signed integer in the range [MIN, MAX].  */
  58 #define R(min, max)  int_range (min, max)
  59
  60 /* Return a unsigned integer in the range [MIN, MAX].  */
  61 #define U(min, max)  uint_range (min, max)
  62
  63 /* Exercise the hh length modifier with ranges.  */
  64 void test_hh (void)
  65 {
  66   T (0, "%hhi", R (  -1,    0));    /* { dg-warning "between 1 and 2 bytes" } */
  67   T (0, "%hhi", R (  -1,    1));    /* { dg-warning "between 1 and 2 bytes" } */
  68   T (0, "%hhi", R (  -1,   12));    /* { dg-warning "between 1 and 2 bytes" } */
  69   T (0, "%hhi", R (  -1,  123));    /* { dg-warning "between 1 and 3 bytes" } */
  70   T (0, "%hhi", R (  -1,  128));    /* { dg-warning "between 1 and 4 bytes" } */
  71   T (0, "%hhi", R (  -1,  257));    /* { dg-warning "between 1 and 4 bytes" } */
  72   T (0, "%hhi", R (  -1, 1234));    /* { dg-warning "between 1 and 4 bytes" } */
  73   T (0, "%hhi", R ( -12,  -11));    /* { dg-warning "writing 3 bytes" } */
  74   T (0, "%hhi", R ( -12,   -1));    /* { dg-warning "between 2 and 3 bytes" } */
  75   T (0, "%hhi", R ( -12,    0));    /* { dg-warning "between 1 and 3 bytes" } */
  76   T (0, "%hhi", R ( -12,    1));    /* { dg-warning "between 1 and 3 bytes" } */
  77   T (0, "%hhi", R ( -12,   12));    /* { dg-warning "between 1 and 3 bytes" } */
  78   T (0, "%hhi", R ( -12,  123));    /* { dg-warning "between 1 and 3 bytes" } */
  79   T (0, "%hhi", R ( -12,  128));    /* { dg-warning "between 1 and 4 bytes" } */
  80   T (0, "%hhi", R ( -12,  257));    /* { dg-warning "between 1 and 4 bytes" } */
  81   T (0, "%hhi", R ( -12, 1234));    /* { dg-warning "between 1 and 4 bytes" } */
  82   T (0, "%hhi", R ( -99,  -10));    /* { dg-warning "writing 3 bytes" } */
  83   T (0, "%hhi", R (-123,   -1));    /* { dg-warning "between 2 and 4 bytes" } */
  84   T (0, "%hhi", R (-123,    0));    /* { dg-warning "between 1 and 4 bytes" } */
  85   T (0, "%hhi", R (-123,    1));    /* { dg-warning "between 1 and 4 bytes" } */
  86   T (0, "%hhi", R (-123,   12));    /* { dg-warning "between 1 and 4 bytes" } */
  87   T (0, "%hhi", R (-123,  123));    /* { dg-warning "between 1 and 4 bytes" } */
  88   T (0, "%hhi", R (-123,  257));    /* { dg-warning "between 1 and 4 bytes" } */
  89   T (0, "%hhi", R (-123, 1234));    /* { dg-warning "between 1 and 4 bytes" } */
  90   T (0, "%hhi", R (-129,    1));    /* { dg-warning "between 1 and 4 bytes" } */
  91   T (0, "%hhi", R (-130, -129));    /* { dg-warning "writing 3 bytes" } */
  92
  93   T (0, "%hhi", U (   0,  127));    /* { dg-warning "between 1 and 3 bytes" } */
  94
  95   /* The following results in either "127" and "-128" so the ideal result
  96      should be "between 3 and 4 bytes" but because of the overflow from
  97      128 to -128 in the %hhi directive the input range is reset to that
  98      of char, or [CHAR_MIN, CHAR_MAX], and the warning reflects that.  */
  99   T (0, "%hhi", U ( 127,  128));    /* { dg-warning "between \[13\] and 4 bytes" } */
 100   /* The following results in either "-128" or "-127".  */
 101   T (0, "%hhi", U ( 128,  129));    /* { dg-warning "writing 4 bytes" } */
 102   /* The following results in between "-128" and "-99".  */
 103   T (0, "%hhi", U ( 128,  157));    /* { dg-warning "writing between 3 and 4 bytes" } */
 104   /* Between "-128" and "-1".  */
 105   T (0, "%hhi", U ( 128,  255));    /* { dg-warning "writing between 2 and 4 bytes" } */
 106   /* Between "-128" and "0".  */
 107   T (0, "%hhi", U ( 128,  256));    /* { dg-warning "writing between 1 and 4 bytes" } */
 108   /* Between "-128" and "" (zero formats as nothing with zero precision).  */
 109   T (0, "%.0hhi", U ( 128,  256));  /* { dg-warning "writing up to 4 bytes" } */
 110   /* Same as above but with a range of precisions including zero.  */
 111   T (0, "%.*hhi",                   /* { dg-warning "writing up to 4 bytes" } */
 112      R (0, 1), U ( 128,  256));
 113   /* Same as above but with a positive range of precisions.  */
 114   T (0, "%.*hhi",                   /* { dg-warning "between 1 and 4 bytes" } */
 115      R (1, 2), U ( 128,  256));
 116   /* Precision range includes zero but width is non-zero so output cannot
 117      be empty.  */
 118   T (0, "%1.*hhi",                  /* { dg-warning "between 1 and 4 bytes" } */
 119      R (0, 2), U ( 128,  256));
 120   /* Same as above but with a width range.  */
 121   T (0, "%*.*hhi",                  /* { dg-warning "between 1 and 4 bytes" } */
 122      R (1, 2), R (0, 2), U ( 128,  256));
 123   /* Same as above but this time width range does include zero.  */
 124   T (0, "%*.*hhi",                  /* { dg-warning "up to 4 bytes" } */
 125      R (0, 2), R (0, 2), U ( 128,  256));
 126
 127   /* Range of precisions in excess of the number of digits and sign.  */
 128   T (0, "%.*hhi",                   /* { dg-warning "between 5 and 8 bytes" } */
 129      R (5, 7), U ( 128,  256));
 130
 131   /* Between "-128" and "+0".  */
 132   T (0, "%+hhi",  U ( 128,  256));  /* { dg-warning "between 2 and 4 bytes" } */
 133   /* Between "-128" and " 0".  */
 134   T (0, "% hhi",  U ( 128,  256));  /* { dg-warning "between 2 and 4 bytes" } */
 135
 136   T (0, "%hhu", R (  -1,    1));    /* { dg-warning "between 1 and 3 bytes" } */
 137   T (0, "%hhu", R (  -1,   12));    /* { dg-warning "between 1 and 3 bytes" } */
 138   T (0, "%hhu", R (  -1,  123));    /* { dg-warning "between 1 and 3 bytes" } */
 139   T (0, "%hhu", R (  -1,  128));    /* { dg-warning "between 1 and 3 bytes" } */
 140   T (0, "%hhu", R (  -1,  257));    /* { dg-warning "between 1 and 3 bytes" } */
 141   T (0, "%hhu", R (  -1, 1234));    /* { dg-warning "between 1 and 3 bytes" } */
 142   T (0, "%hhu", R ( -12,    1));    /* { dg-warning "between 1 and 3 bytes" } */
 143   T (0, "%hhu", R ( -12,   12));    /* { dg-warning "between 1 and 3 bytes" } */
 144   T (0, "%hhu", R ( -12,  123));    /* { dg-warning "between 1 and 3 bytes" } */
 145   T (0, "%hhu", R ( -12,  128));    /* { dg-warning "between 1 and 3 bytes" } */
 146   T (0, "%hhu", R ( -12,  257));    /* { dg-warning "between 1 and 3 bytes" } */
 147   T (0, "%hhu", R ( -12, 1234));    /* { dg-warning "between 1 and 3 bytes" } */
 148   T (0, "%hhu", R (-123,    1));    /* { dg-warning "between 1 and 3 bytes" } */
 149   T (0, "%hhu", R (-123,   12));    /* { dg-warning "between 1 and 3 bytes" } */
 150   T (0, "%hhu", R (-123,  123));    /* { dg-warning "between 1 and 3 bytes" } */
 151   T (0, "%hhu", R (-123,  257));    /* { dg-warning "between 1 and 3 bytes" } */
 152   T (0, "%hhu", R (-123, 1234));    /* { dg-warning "between 1 and 3 bytes" } */
 153   T (0, "%hhu", R (-129,    1));    /* { dg-warning "between 1 and 3 bytes" } */
 154   T (0, "%hhu", R (-199, -159));    /* { dg-warning "writing 2 bytes" } */
 155   T (0, "%hhu", R (-255, -250));    /* { dg-warning "writing 1 byte" } */
 156 }
 157
 158 /* Exercise the h length modifier.  */
 159 void test_h (void)
 160 {
 161   T (0, "%hi", R (    -1,     0));  /* { dg-warning "between 1 and 2 bytes" } */
 162   T (0, "%hi", R (     0,     1));  /* { dg-warning "writing 1 byte" } */
 163   T (0, "%hi", R (    -1,     1));  /* { dg-warning "between 1 and 2 bytes" } */
 164   T (0, "%hi", R (    -1,    12));  /* { dg-warning "between 1 and 2 bytes" } */
 165   T (0, "%hi", R (   -12,     1));  /* { dg-warning "between 1 and 3 bytes" } */
 166   T (0, "%hi", R (   -99,   -10));  /* { dg-warning "writing 3 bytes" } */
 167   T (0, "%hi", R (  -123,     4));  /* { dg-warning "between 1 and 4 bytes" } */
 168   T (0, "%hi", R ( -1234,    56));  /* { dg-warning "between 1 and 5 bytes" } */
 169   T (0, "%hi", R ( -1234,   567));  /* { dg-warning "between 1 and 5 bytes" } */
 170   T (0, "%hi", R ( -1234,  5678));  /* { dg-warning "between 1 and 5 bytes" } */
 171   T (0, "%ho", R (-32768,-32767));  /* { dg-warning "writing 6 bytes" } */
 172
 173   T (0, "%ho", R (    -1,     0));  /* { dg-warning "between 1 and 6 bytes" } */
 174   T (0, "%ho", R (     0,     1));  /* { dg-warning "writing 1 byte" } */
 175   T (0, "%ho", R (    -1,     1));  /* { dg-warning "between 1 and 6 bytes" } */
 176   T (0, "%ho", R (    -1,    12));  /* { dg-warning "between 1 and 6 bytes" } */
 177   T (0, "%ho", R (   -12,     1));  /* { dg-warning "between 1 and 6 bytes" } */
 178   T (0, "%ho", R (  -123,     4));  /* { dg-warning "between 1 and 6 bytes" } */
 179   T (0, "%ho", R ( -1234,    56));  /* { dg-warning "between 1 and 6 bytes" } */
 180   T (0, "%ho", R ( -1234,   567));  /* { dg-warning "between 1 and 6 bytes" } */
 181   T (0, "%ho", R ( -1234,  5678));  /* { dg-warning "between 1 and 6 bytes" } */
 182   T (0, "%ho", R (-32768,-32767));  /* { dg-warning "writing 6 bytes" } */
 183
 184   T (0, "%hu", R (    -1,     0));  /* { dg-warning "between 1 and 5 bytes" } */
 185   T (0, "%hu", R (     0,     1));  /* { dg-warning "writing 1 byte" } */
 186   T (0, "%hu", R (    -1,     1));  /* { dg-warning "between 1 and 5 bytes" } */
 187   T (0, "%hu", R (    -1,    12));  /* { dg-warning "between 1 and 5 bytes" } */
 188   T (0, "%hu", R (   -12,     1));  /* { dg-warning "between 1 and 5 bytes" } */
 189   T (0, "%hu", R (  -123,     4));  /* { dg-warning "between 1 and 5 bytes" } */
 190   T (0, "%hu", R ( -1234,    56));  /* { dg-warning "between 1 and 5 bytes" } */
 191   T (0, "%hu", R ( -1234,   567));  /* { dg-warning "between 1 and 5 bytes" } */
 192   T (0, "%hu", R ( -1234,  5678));  /* { dg-warning "between 1 and 5 bytes" } */
 193   T (0, "%hu", R (-32768,-32767));  /* { dg-warning "writing 5 bytes" } */
 194
 195   T (0, "%hx", R (-32768,-32767));  /* { dg-warning "writing 4 bytes" } */
 196 }
 197
 198 /* Exercise integer directives with no length modifier.  */
 199 void test_diou (void)
 200 {
 201   T (0, "%d", R (    -1,     0));   /* { dg-warning "between 1 and 2 bytes" } */
 202   T (0, "%i", R (     0,     1));   /* { dg-warning "writing 1 byte" } */
 203   T (0, "%d", R (    -1,     1));   /* { dg-warning "between 1 and 2 bytes" } */
 204   T (0, "%i", R (    -1,    12));   /* { dg-warning "between 1 and 2 bytes" } */
 205   T (0, "%d", R (   -12,     1));   /* { dg-warning "between 1 and 3 bytes" } */
 206   T (0, "%i", R (  -123,     4));   /* { dg-warning "between 1 and 4 bytes" } */
 207   T (0, "%d", R ( -1234,    56));   /* { dg-warning "between 1 and 5 bytes" } */
 208   T (0, "%i", R ( -1234,   567));   /* { dg-warning "between 1 and 5 bytes" } */
 209   T (0, "%d", R ( -1234,  5678));   /* { dg-warning "between 1 and 5 bytes" } */
 210
 211   T (0, "%u", R (    -1,     0));  /* { dg-warning "between 1 and 10 bytes" } */
 212   T (0, "%u", R (     0,     1));  /* { dg-warning "writing 1 byte" } */
 213   T (0, "%u", R (    -1,     1));  /* { dg-warning "between 1 and 10 bytes" } */
 214   T (0, "%u", R (    -1,    12));  /* { dg-warning "between 1 and 10 bytes" } */
 215   T (0, "%u", R (   -12,     1));  /* { dg-warning "between 1 and 10 bytes" } */
 216   T (0, "%u", R (  -123,     4));  /* { dg-warning "between 1 and 10 bytes" } */
 217   T (0, "%u", R ( -1234,    56));  /* { dg-warning "between 1 and 10 bytes" } */
 218   T (0, "%u", R ( -1234,   567));  /* { dg-warning "between 1 and 10 bytes" } */
 219   T (0, "%u", R ( -1234,  5678));  /* { dg-warning "between 1 and 10 bytes" } */
 220
 221   T (0, "%o", R (    -1,     0));  /* { dg-warning "between 1 and 11 bytes" } */
 222   T (0, "%o", R (    -2,     1));  /* { dg-warning "between 1 and 11 bytes" } */
 223   T (0, "%o", R (     0,     1));  /* { dg-warning "writing 1 byte" } */
 224
 225   T (0, "%x", R (    -1,     0));  /* { dg-warning "between 1 and 8 bytes" } */
 226   T (0, "%x", R (    -2,     1));  /* { dg-warning "between 1 and 8 bytes" } */
 227   T (0, "%x", R (     0,     1));  /* { dg-warning "writing 1 byte" } */
 228 }