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comparison gcc/testsuite/c-c++-common/builtin_location.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* PR c++/66561 - __builtin_LINE at al. should yield constant expressions */
2 /* { dg-do compile } */
3
4 #if __cplusplus >= 201103L
5 # define Assert(expr) static_assert ((expr), #expr)
6 #elif __STDC_VERSION__ >= 201112L
7 # define Assert(expr) _Static_assert ((expr), #expr)
8 #else
9 # define CONCAT(a, b) a ## b
10 # define CAT(a, b) CONCAT (a, b)
11 # define Assert(expr) typedef int CAT (Assert_, __LINE__) [1 - 2 * !(expr)]
12 #endif
13
14 /* Verify (in C) that __builtin_FILE() yields an address constant.
15 This test is ineffective in C++ where initializers of global
16 objects need not be constant expressions. */
17 const char* const file = __builtin_FILE ();
18
19 /* Verify (in C) that __builtin_FUNCTION() yields an address constant. */
20 const char* const function = __builtin_FUNCTION ();
21
22 /* Also verify that __builtin_constant_p() returns true for both. */
23 Assert (__builtin_constant_p (__builtin_FILE ()));
24 Assert (__builtin_constant_p (__builtin_FUNCTION ()));
25
26 /* Verify (in both C and C++ 11 and later) that both __builtin_FILE ()
27 and __builtin_FUNCTION() yield an address constant by making use
28 of a GCC extension that allows operands of arithmetic constant
29 expressions to be address constants. (Subtracting two literals
30 from one another is undefined in both C and C++ and should be
31 diagnosed. See c/70772.) */
32
33 #pragma GCC diagnostic push
34 #pragma GCC diagnostic ignored "-Waddress"
35
36 enum E0 {
37 e0 = __FILE__ - __FILE__,
38 e1 = __builtin_FILE () - __builtin_FILE (),
39
40 #if !__cplusplus || __cplusplus >= 201103L
41 /* Skip this test in C++ 98 where GCC rejects __FUNCTION__ in constant
42 expressions. */
43 e2 = __FUNCTION__ - __FUNCTION__,
44 e3 = __builtin_FUNCTION () - __builtin_FUNCTION ()
45
46 #endif
47 };
48
49 #pragma GCC diagnostic pop
50
51 /* Verify that __builtin_LINE () yields an integer constant expression. */
52 #line 13
53 int a [__builtin_LINE ()][__builtin_LINE ()];
54 enum F { f0 = __builtin_LINE () };
55 struct S { unsigned bitfield: __builtin_LINE (); } s;
56
57 Assert (__builtin_constant_p (__builtin_LINE ()));