File: loop-widening.cpp

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (27 lines) | stat: -rw-r--r-- 837 bytes parent folder | download | duplicates (23) 
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
 
// RUN: %clang_analyze_cc1 -verify %s \
// RUN:   -analyzer-checker=core \
// RUN:   -analyzer-config widen-loops=true \
// RUN:   -analyzer-config track-conditions=false \
// RUN:   -analyzer-max-loop 2 -analyzer-output=text

namespace pr43102 {
class A {
public:
  void m_fn1();
};
bool g;
void fn1() {
  A a;
  A *b = &a;

  for (;;) { // expected-note{{Loop condition is true.  Entering loop body}}
             // expected-note@-1{{Loop condition is true.  Entering loop body}}
             // expected-note@-2{{Value assigned to 'b'}}
             // no crash during bug report construction

    g = !b;     // expected-note{{Assuming 'b' is null}}
    b->m_fn1(); // expected-warning{{Called C++ object pointer is null}}
                // expected-note@-1{{Called C++ object pointer is null}}
  }
}
} // end of namespace pr43102