clang/test/Analysis/symbol-simplification-reassume.cpp

   1 // RUN: %clang_analyze_cc1 %s \
   2 // RUN:   -analyzer-checker=core \
   3 // RUN:   -analyzer-checker=debug.ExprInspection \
   4 // RUN:   -analyzer-config eagerly-assume=false \
   5 // RUN:   -verify
   6
   7 // In this test we check whether the solver's symbol simplification mechanism
   8 // is capable of re-assuming simiplified symbols.
   9
  10 void clang_analyzer_eval(bool);
  11 void clang_analyzer_warnIfReached();
  12
  13 void test_reassume_false_range(int x, int y) {
  14   if (x + y != 0) // x + y == 0
  15     return;
  16   if (x != 1)     // x == 1
  17     return;
  18   clang_analyzer_eval(y == -1); // expected-warning{{TRUE}}
  19 }
  20
  21 void test_reassume_true_range(int x, int y) {
  22   if (x + y != 1) // x + y == 1
  23     return;
  24   if (x != 1)     // x == 1
  25     return;
  26   clang_analyzer_eval(y == 0); // expected-warning{{TRUE}}
  27 }
  28
  29 void test_reassume_inclusive_range(int x, int y) {
  30   if (x + y < 0 || x + y > 1) // x + y: [0, 1]
  31     return;
  32   if (x != 1)                 // x == 1
  33     return;
  34                               // y: [-1, 0]
  35   clang_analyzer_eval(y > 0); // expected-warning{{FALSE}}
  36   clang_analyzer_eval(y < -1);// expected-warning{{FALSE}}
  37 }