File: warn-null.c

package info (click to toggle)
llvm-toolchain-3.8 1%3A3.8.1-12~bpo8%2B1
  • links: PTS, VCS
  • area: main
  • in suites: jessie-backports
  • size: 378,896 kB
  • sloc: cpp: 2,309,676; ansic: 477,070; objc: 100,918; asm: 97,974; python: 95,911; sh: 18,634; makefile: 7,265; perl: 5,584; ml: 5,460; pascal: 4,661; lisp: 2,548; xml: 686; cs: 350; php: 212; csh: 117
file content (14 lines) | stat: -rw-r--r-- 725 bytes parent folder | download | duplicates (23) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
 
// RUN: %clang_cc1 %s -verify

#define SOME_ADDR (unsigned long long)0

// PR10837: Warn if a non-pointer-typed expression is folded to a null pointer
int *p = 0;
int *q = '\0'; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
int *r = (1 - 1); // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
void f() {
  p = 0;
  q = '\0'; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
  r = 1 - 1; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
  p = SOME_ADDR; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
}