reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162
  163
  164
  165
  166
  167
  168
  169
  170
  171
  172
  173
  174
  175
  176
  177
  178
  179
  180
  181
  182
  183
  184
  185
  186
  187
  188
  189
  190
  191
  192
  193
  194
  195
  196
  197
  198
  199
  200
  201
  202
  203
  204
  205
  206
  207
  208
  209
  210
  211
  212
  213
  214
  215
  216
  217
  218
  219
  220
  221
  222
  223
  224
  225
  226
  227
  228
  229
  230
  231
  232
  233
  234
  235
  236
  237
  238
  239
  240
  241
  242
  243
  244
  245
  246
  247
  248
  249
  250
  251
  252
  253
  254
  255
  256
  257
  258
  259
  260
  261
  262
  263
  264
  265
  266
  267
  268
  269
  270
  271
  272
  273
  274
  275
  276
  277
  278
  279
  280
  281
  282
  283
  284
  285
  286
  287
  288
  289
  290
  291
  292
  293
  294
  295
  296
  297
  298
  299
  300
  301
  302
  303
  304
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -analyzer-config eagerly-assume=false -verify %s

void clang_analyzer_eval(int);

#define UINT_MAX (~0U)
#define INT_MAX (UINT_MAX & (UINT_MAX >> 1))
#define INT_MIN (-INT_MAX - 1)


// Each of these adjusted ranges has an adjustment small enough to split the
// solution range across an overflow boundary (Min for <, Max for >).
// This corresponds to one set of branches in RangeConstraintManager.
void smallAdjustmentGT (unsigned a) {
  if (a+2 > 1)
    clang_analyzer_eval(a < UINT_MAX-1); // expected-warning{{TRUE}}
  else
    clang_analyzer_eval(a == UINT_MAX-1 || a == UINT_MAX); // expected-warning{{TRUE}}
}

void smallAdjustmentGE (unsigned a) {
  if (a+2 >= 1)
    clang_analyzer_eval(a < UINT_MAX-1 || a == UINT_MAX); // expected-warning{{TRUE}}
  else
    clang_analyzer_eval(a == UINT_MAX-1); // expected-warning{{TRUE}}
}

void smallAdjustmentLT (unsigned a) {
  if (a+1 < 2)
    clang_analyzer_eval(a == 0 || a == UINT_MAX); // expected-warning{{TRUE}}
}

void smallAdjustmentLE (unsigned a) {
  if (a+1 <= 2)
    clang_analyzer_eval(a == 0 || a == 1 || a == UINT_MAX); // expected-warning{{TRUE}}
}


// Each of these adjusted ranges has an adjustment large enough to push the
// comparison value over an overflow boundary (Min for <, Max for >).
// This corresponds to one set of branches in RangeConstraintManager.
void largeAdjustmentGT (unsigned a) {
  if (a-2 > UINT_MAX-1)
    clang_analyzer_eval(a == 1); // expected-warning{{TRUE}}
  else
    clang_analyzer_eval(a != 1); // expected-warning{{TRUE}}
}

void largeAdjustmentGE (unsigned a) {
  if (a-2 >= UINT_MAX-1)
    clang_analyzer_eval(a == 1 || a == 0); // expected-warning{{TRUE}}
  else
    clang_analyzer_eval(a > 1); // expected-warning{{TRUE}}
}

void largeAdjustmentLT (unsigned a) {
  if (a+2 < 1)
    clang_analyzer_eval(a == UINT_MAX-1); // expected-warning{{TRUE}}
  else
    clang_analyzer_eval(a != UINT_MAX-1); // expected-warning{{TRUE}}
}

void largeAdjustmentLE (unsigned a) {
  if (a+2 <= 1)
    clang_analyzer_eval(a == UINT_MAX-1 || a == UINT_MAX); // expected-warning{{TRUE}}
  else
    clang_analyzer_eval(a < UINT_MAX-1); // expected-warning{{TRUE}}
}


// Test the nine cases in RangeConstraintManager's pinning logic.
// For out-of-range tautologies, it may be the negation that actually
// triggers the case in question.
void mixedComparisons1(signed char a) {
  // Case 1: The range is entirely below the symbol's range.
  int min = INT_MIN;

  clang_analyzer_eval((a - 2) >= (min + 5LL)); // expected-warning{{TRUE}}

  clang_analyzer_eval(a == 0); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
}

void mixedComparisons2(signed char a) {
  // Case 2: Only the lower end of the range is outside.
  clang_analyzer_eval((a - 5) < (-0x81LL)); // expected-warning{{UNKNOWN}}

  if ((a - 5) < (-0x81LL)) {
    clang_analyzer_eval(a == 0); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == 0x7F); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
  }
}

void mixedComparisons3(signed char a) {
  // Case 3: The entire symbol range is covered.
  clang_analyzer_eval((a - 0x200) < -0x100LL); // expected-warning{{TRUE}}

  clang_analyzer_eval(a == 0); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
}

void mixedComparisons4(signed char a) {
  // Case 4: The range wraps around, but the lower wrap is out-of-range.
  clang_analyzer_eval((a - 5) > 0LL); // expected-warning{{UNKNOWN}}

  if ((a - 5) > 0LL) {
    clang_analyzer_eval(a == 0); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
    clang_analyzer_eval(a == -0x80); // expected-warning{{FALSE}}
  }
}

void mixedComparisons5(signed char a) {
  // Case 5: The range is inside and may or may not wrap.
  clang_analyzer_eval((a + 5) == 0LL); // expected-warning{{UNKNOWN}}

  if ((a + 5) == 0LL) {
    clang_analyzer_eval(a == 0); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == 0x7F); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == -0x80); // expected-warning{{FALSE}}
  } else {
    clang_analyzer_eval(a == 0); // expected-warning{{UNKNOWN}}
    clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
    clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
  }
}

void mixedComparisons6(signed char a) {
  // Case 6: Only the upper end of the range is outside.
  clang_analyzer_eval((a + 5) > 0x81LL); // expected-warning{{UNKNOWN}}

  if ((a + 5) > 0x81LL) {
    clang_analyzer_eval(a == 0); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
    clang_analyzer_eval(a == -0x80); // expected-warning{{FALSE}}
  }
}

void mixedComparisons7(signed char a) {
  // Case 7: The range wraps around but is entirely outside the symbol's range.
  int min = INT_MIN;

  clang_analyzer_eval((a + 2) >= (min + 5LL)); // expected-warning{{TRUE}}

  clang_analyzer_eval(a == 0); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
}

void mixedComparisons8(signed char a) {
  // Case 8: The range wraps, but the upper wrap is out of range.
  clang_analyzer_eval((a + 5) < 0LL); // expected-warning{{UNKNOWN}}

  if ((a + 5) < 0LL) {
    clang_analyzer_eval(a == 0); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == 0x7F); // expected-warning{{FALSE}}
    clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
  }
}

void mixedComparisons9(signed char a) {
  // Case 9: The range is entirely above the symbol's range.
  int max = INT_MAX;

  clang_analyzer_eval((a + 2) <= (max - 5LL)); // expected-warning{{TRUE}}

  clang_analyzer_eval(a == 0); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == 0x7F); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == -0x80); // expected-warning{{UNKNOWN}}
}


void mixedSignedness1(int a) {
  unsigned max = UINT_MAX;
  clang_analyzer_eval(a < max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) < max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) < max); // expected-warning{{UNKNOWN}}
}

void mixedSignedness2(int a) {
  unsigned max = UINT_MAX;
  clang_analyzer_eval(a <= max); // expected-warning{{TRUE}}
  clang_analyzer_eval((a + 2) <= max); // expected-warning{{TRUE}}
  clang_analyzer_eval((a + 2U) <= max); // expected-warning{{TRUE}}
}

void mixedSignedness3(unsigned a) {
  int max = INT_MAX;
  clang_analyzer_eval(a < max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) < max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) < max); // expected-warning{{UNKNOWN}}
}

void mixedSignedness4(unsigned a) {
  int max = INT_MAX;
  clang_analyzer_eval(a <= max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= max); // expected-warning{{UNKNOWN}}
}

void mixedSignedness5(unsigned a) {
  int min = INT_MIN;
  clang_analyzer_eval(a < min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) < min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) < min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness6(unsigned a) {
  int min = INT_MIN;
  clang_analyzer_eval(a <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness7(unsigned a) {
  unsigned min = 0;
  clang_analyzer_eval(a < min); // expected-warning{{FALSE}}
  clang_analyzer_eval((a + 2) < min); // expected-warning{{FALSE}}
  clang_analyzer_eval((a + 2U) < min); // expected-warning{{FALSE}}
}

void mixedSignedness8(unsigned a) {
  unsigned min = 0;
  clang_analyzer_eval(a <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness9(unsigned a) {
  int min = 0;
  clang_analyzer_eval(a < min); // expected-warning{{FALSE}}
  clang_analyzer_eval((a + 2) < min); // expected-warning{{FALSE}}
  clang_analyzer_eval((a + 2U) < min); // expected-warning{{FALSE}}
}

void mixedSignedness10(unsigned a) {
  int min = 0;
  clang_analyzer_eval(a <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness11(int a) {
  int min = 0;
  clang_analyzer_eval(a < min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) < min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) < min); // expected-warning{{FALSE}}
}

void mixedSignedness12(int a) {
  int min = 0;
  clang_analyzer_eval(a <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness13(int a) {
  unsigned max = INT_MAX;
  clang_analyzer_eval(a < max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) < max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) < max); // expected-warning{{UNKNOWN}}
}

void mixedSignedness14(int a) {
  unsigned max = INT_MAX;
  clang_analyzer_eval(a <= max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= max); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= max); // expected-warning{{UNKNOWN}}
}

void mixedSignedness15(int a) {
  unsigned min = INT_MIN;
  clang_analyzer_eval(a < min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) < min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) < min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness16(int a) {
  unsigned min = INT_MIN;
  clang_analyzer_eval(a <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2) <= min); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval((a + 2U) <= min); // expected-warning{{UNKNOWN}}
}

void mixedSignedness17(int a) {
  unsigned max = INT_MAX;
  if (a < max)
    return;

  clang_analyzer_eval(a < 0); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == 0); // expected-warning{{FALSE}}
  clang_analyzer_eval(a == INT_MAX); // expected-warning{{UNKNOWN}}
}

void mixedSignedness18(int a) {
  if (a >= 0)
    return;

  clang_analyzer_eval(a < 0); // expected-warning{{TRUE}}
  clang_analyzer_eval(a == (unsigned)INT_MIN); // expected-warning{{UNKNOWN}}
  clang_analyzer_eval(a == UINT_MAX); // expected-warning{{UNKNOWN}}
}