1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 #ifndef POINTER_COMPARISON_TEST_HELPER_H
9 #define POINTER_COMPARISON_TEST_HELPER_H
10 
11 #include <cstdint>
12 #include <cassert>
13 
14 #include "test_macros.h"
15 
16 template <template <class> class CompareTemplate>
17 void do_pointer_comparison_test() {
18   typedef CompareTemplate<int*> Compare;
19   typedef CompareTemplate<std::uintptr_t> UIntCompare;
20 #if TEST_STD_VER > 11
21   typedef CompareTemplate<void> VoidCompare;
22 #else
23   typedef Compare VoidCompare;
24 #endif
25 
26   Compare comp;
27   UIntCompare ucomp;
28   VoidCompare vcomp;
29   struct {
30     int a, b;
31   } local;
32   int* pointers[] = {&local.a, &local.b, nullptr, &local.a + 1};
33   for (int* lhs : pointers) {
34     for (int* rhs : pointers) {
35       std::uintptr_t lhs_uint = reinterpret_cast<std::uintptr_t>(lhs);
36       std::uintptr_t rhs_uint = reinterpret_cast<std::uintptr_t>(rhs);
37       assert(comp(lhs, rhs) == ucomp(lhs_uint, rhs_uint));
38       assert(vcomp(lhs, rhs) == ucomp(lhs_uint, rhs_uint));
39     }
40   }
41 }
42 
43 template <class Comp>
44 void do_pointer_comparison_test(Comp comp) {
45   struct {
46     int a, b;
47   } local;
48   int* pointers[] = {&local.a, &local.b, nullptr, &local.a + 1};
49   for (int* lhs : pointers) {
50     for (int* rhs : pointers) {
51       std::uintptr_t lhs_uint = reinterpret_cast<std::uintptr_t>(lhs);
52       std::uintptr_t rhs_uint = reinterpret_cast<std::uintptr_t>(rhs);
53       void*          lhs_void = static_cast<void*>(lhs);
54       void*          rhs_void = static_cast<void*>(rhs);
55       assert(comp(lhs, rhs) == comp(lhs_uint, rhs_uint));
56       assert(comp(lhs_void, rhs_void) == comp(lhs_uint, rhs_uint));
57     }
58   }
59 }
60 
61 #endif // POINTER_COMPARISON_TEST_HELPER_H
62