clang/test/Analysis/svalbuilder-simplify-intsym.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 // Here we test whether the SValBuilder is capable to simplify existing
   8 // IntSym expressions based on a newly added constraint on the sub-expression.
   9
  10 void clang_analyzer_eval(bool);
  11
  12 void test_SValBuilder_simplifies_IntSym(int x, int y) {
  13   // Most IntSym BinOps are transformed to SymInt in SimpleSValBuilder.
  14   // Division is one exception.
  15   x = 77 / y;
  16   if (y != 1)
  17     return;
  18   clang_analyzer_eval(x == 77); // expected-warning{{TRUE}}
  19   (void)(x * y);
  20 }