clang/test/Analysis/solver-sym-simplification-concreteint.c

   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 void clang_analyzer_warnIfReached(void);
   8 void clang_analyzer_eval(_Bool);
   9
  10 void test_simplification_to_concrete_int_infeasible(int b, int c) {
  11   if (c + b != 0)     // c + b == 0
  12     return;
  13   if (b != 1)         // b == 1  --> c + 1 == 0
  14     return;
  15   if (c != 1)         // c == 1  --> 1 + 1 == 0 contradiction
  16     return;
  17   clang_analyzer_warnIfReached(); // no-warning
  18
  19   // Keep the symbols and the constraints! alive.
  20   (void)(b * c);
  21   return;
  22 }
  23
  24 void test_simplification_to_concrete_int_feasible(int b, int c) {
  25   if (c + b != 0)
  26     return;
  27                       // c + b == 0
  28   if (b != 1)
  29     return;
  30                       // b == 1   -->  c + 1 == 0
  31   if (c != -1)
  32     return;
  33                       // c == -1  --> -1 + 1 == 0 OK
  34   clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
  35   clang_analyzer_eval(c == -1);   // expected-warning{{TRUE}}
  36
  37   // Keep the symbols and the constraints! alive.
  38   (void)(b * c);
  39   return;
  40 }