File: solver-sym-simplification-concreteint.c

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (40 lines) | stat: -rw-r--r-- 1,138 bytes parent folder | download | duplicates (13) 
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
33
34
35
36
37
38
39
40
 
// RUN: %clang_analyze_cc1 %s \
// RUN:   -analyzer-checker=core \
// RUN:   -analyzer-checker=debug.ExprInspection \
// RUN:   -analyzer-config eagerly-assume=false \
// RUN:   -verify

void clang_analyzer_warnIfReached(void);
void clang_analyzer_eval(_Bool);

void test_simplification_to_concrete_int_infeasible(int b, int c) {
  if (c + b != 0)     // c + b == 0
    return;
  if (b != 1)         // b == 1  --> c + 1 == 0
    return;
  if (c != 1)         // c == 1  --> 1 + 1 == 0 contradiction
    return;
  clang_analyzer_warnIfReached(); // no-warning

  // Keep the symbols and the constraints! alive.
  (void)(b * c);
  return;
}

void test_simplification_to_concrete_int_feasible(int b, int c) {
  if (c + b != 0)
    return;
                      // c + b == 0
  if (b != 1)
    return;
                      // b == 1   -->  c + 1 == 0
  if (c != -1)
    return;
                      // c == -1  --> -1 + 1 == 0 OK
  clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
  clang_analyzer_eval(c == -1);   // expected-warning{{TRUE}}

  // Keep the symbols and the constraints! alive.
  (void)(b * c);
  return;
}