File: address-packed-member-memops.cpp

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 (28 lines) | stat: -rw-r--r-- 571 bytes parent folder | download | duplicates (28) 
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
 
// RUN: %clang_cc1 -fsyntax-only -verify %s
// expected-no-diagnostics

struct B {
  int x, y, z, w;
} b;

struct __attribute__((packed)) A {
  struct B b;
} a;

typedef __typeof__(sizeof(int)) size_t;

extern "C" {
void *memcpy(void *dest, const void *src, size_t n);
int memcmp(const void *s1, const void *s2, size_t n);
void *memmove(void *dest, const void *src, size_t n);
void *memset(void *s, int c, size_t n);
}

int x;

void foo() {
  memcpy(&a.b, &b, sizeof(b));
  memmove(&a.b, &b, sizeof(b));
  memset(&a.b, 0, sizeof(b));
  x = memcmp(&a.b, &b, sizeof(b));
}