File: warn-null.c

package info (click to toggle)
llvm-toolchain-3.9 1%3A3.9.1-9
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 441,144 kB
  • ctags: 428,836
  • sloc: cpp: 2,546,577; ansic: 538,318; asm: 119,677; objc: 103,316; python: 102,148; sh: 27,847; pascal: 5,626; ml: 5,510; perl: 5,293; lisp: 4,801; makefile: 2,177; xml: 686; cs: 362; 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}}
}