summaryrefslogtreecommitdiff
path: root/clang/test/SemaCXX/warn-cast-align.cpp
blob: 68acbdd4eaa3a77c142e53b1bdfe0e5f3d8c8a45 (about) (plain)
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -Wcast-align -verify %s

// Simple casts.
void test0(char *P) {
  char *a; short *b; int *c;

  a = (char*) P;
  a = static_cast<char*>(P);
  a = reinterpret_cast<char*>(P);
  typedef char *CharPtr;
  a = CharPtr(P);

  b = (short*) P; // expected-warning {{cast from 'char *' to 'short *' increases required alignment from 1 to 2}}
  b = reinterpret_cast<short*>(P);
  typedef short *ShortPtr;
  b = ShortPtr(P); // expected-warning {{cast from 'char *' to 'ShortPtr' (aka 'short *') increases required alignment from 1 to 2}}

  c = (int*) P; // expected-warning {{cast from 'char *' to 'int *' increases required alignment from 1 to 4}}
  c = reinterpret_cast<int*>(P);
  typedef int *IntPtr;
  c = IntPtr(P); // expected-warning {{cast from 'char *' to 'IntPtr' (aka 'int *') increases required alignment from 1 to 4}}
}

// Casts from void* are a special case.
void test1(void *P) {
  char *a; short *b; int *c;

  a = (char*) P;
  a = static_cast<char*>(P);
  a = reinterpret_cast<char*>(P);
  typedef char *CharPtr;
  a = CharPtr(P);

  b = (short*) P;
  b = static_cast<short*>(P);
  b = reinterpret_cast<short*>(P);
  typedef short *ShortPtr;
  b = ShortPtr(P);

  c = (int*) P;
  c = static_cast<int*>(P);
  c = reinterpret_cast<int*>(P);
  typedef int *IntPtr;
  c = IntPtr(P);
}