clang/test/Analysis/svalbuilder-float-cast.c

   1 // RUN: %clang_analyze_cc1 -analyzer-checker debug.ExprInspection -Wno-deprecated-non-prototype -verify %s
   2 // RUN: %clang_analyze_cc1 -analyzer-checker debug.ExprInspection -Wno-deprecated-non-prototype -verify %s \
   3 // RUN:    -analyzer-config support-symbolic-integer-casts=true
   4
   5 void clang_analyzer_denote(int, const char *);
   6 void clang_analyzer_express(int);
   7 void clang_analyzer_dump(int);
   8 void clang_analyzer_dump_ptr(int *);
   9
  10 void SymbolCast_of_float_type_aux(int *p) {
  11   clang_analyzer_dump_ptr(p); // expected-warning {{&x}}
  12   clang_analyzer_dump(*p); // expected-warning {{Unknown}}
  13   // Storing to the memory region of 'float x' as 'int' will
  14   // materialize a fresh conjured symbol to regain accuracy.
  15   *p += 0;
  16   clang_analyzer_dump_ptr(p); // expected-warning {{&x}}
  17   clang_analyzer_dump(*p); // expected-warning {{conj_$0{int}}
  18   clang_analyzer_denote(*p, "$x");
  19
  20   *p += 1;
  21   // This should NOT be (float)$x + 1. Symbol $x was never casted to float.
  22   clang_analyzer_express(*p); // expected-warning{{$x + 1}}
  23 }
  24
  25 void SymbolCast_of_float_type(void) {
  26   extern float x;
  27   void (*f)() = SymbolCast_of_float_type_aux;
  28   f(&x);
  29 }