clang/test/Analysis/builtin_bitcast.cpp

// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \
// RUN:   -analyzer-checker=core,debug.ExprInspection

template <typename T> void clang_analyzer_dump(T);

__attribute__((always_inline)) static inline constexpr unsigned int _castf32_u32(float __A) {
  return __builtin_bit_cast(unsigned int, __A); // no-warning
}

void test(int i) {
  _castf32_u32(42);

  float f = 42;

  // Loading from a floating point value results in unknown,
  // which later materializes as a conjured value.
  auto g = __builtin_bit_cast(unsigned int, f);
  clang_analyzer_dump(g);
  // expected-warning-re@-1 {{{{^conj_\$[0-9]+{unsigned int,}}}}

  auto g2 = __builtin_bit_cast(unsigned int, 42.0f);
  clang_analyzer_dump(g2);
  // expected-warning-re@-1 {{{{^conj_\$[0-9]+{unsigned int,}}}}

  auto g3 = __builtin_bit_cast(unsigned int, i);
  clang_analyzer_dump(g3);
  // expected-warning-re@-1 {{{{^reg_\$[0-9]+<int i>}}}}

  auto g4 = __builtin_bit_cast(unsigned long, &i);
  clang_analyzer_dump(g4);
  // expected-warning@-1 {{&i [as 64 bit integer]}}
}