File: builtin_bitcast.cpp

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (32 lines) | stat: -rw-r--r-- 1,058 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
// 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]}}
}