File: svalbuilder-float-cast.c

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 (29 lines) | stat: -rw-r--r-- 1,143 bytes parent folder | download | duplicates (12)
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
// RUN: %clang_analyze_cc1 -analyzer-checker debug.ExprInspection -Wno-deprecated-non-prototype -verify %s
// RUN: %clang_analyze_cc1 -analyzer-checker debug.ExprInspection -Wno-deprecated-non-prototype -verify %s \
// RUN:    -analyzer-config support-symbolic-integer-casts=true

void clang_analyzer_denote(int, const char *);
void clang_analyzer_express(int);
void clang_analyzer_dump(int);
void clang_analyzer_dump_ptr(int *);

void SymbolCast_of_float_type_aux(int *p) {
  clang_analyzer_dump_ptr(p); // expected-warning {{&x}}
  clang_analyzer_dump(*p); // expected-warning {{Unknown}}
  // Storing to the memory region of 'float x' as 'int' will
  // materialize a fresh conjured symbol to regain accuracy.
  *p += 0;
  clang_analyzer_dump_ptr(p); // expected-warning {{&x}}
  clang_analyzer_dump(*p); // expected-warning {{conj_$0{int}}
  clang_analyzer_denote(*p, "$x");

  *p += 1;
  // This should NOT be (float)$x + 1. Symbol $x was never casted to float.
  clang_analyzer_express(*p); // expected-warning{{$x + 1}}
}

void SymbolCast_of_float_type(void) {
  extern float x;
  void (*f)() = SymbolCast_of_float_type_aux;
  f(&x);
}