File: warn-null.c

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (14 lines) | stat: -rw-r--r-- 725 bytes parent folder | download | duplicates (24) 
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}}
}