clang/test/Preprocessor/feature_tests.c

   1 // RUN: %clang_cc1 %s -triple=i686-apple-darwin9 -target-cpu pentium4 -verify -DVERIFY
   2 // RUN: %clang_cc1 %s -E -triple=i686-apple-darwin9 -target-cpu pentium4
   3 // RUN: %clang_cc1 %s -triple=i686-apple-darwin9 -target-cpu pentium4 -fms-extensions -DMS -verify -DVERIFY
   4 // RUN: %clang_cc1 %s -E -triple=i686-apple-darwin9 -target-cpu pentium4 -fms-extensions -DMS
   5 #ifndef __has_feature
   6 #error Should have __has_feature
   7 #endif
   8
   9
  10 #if __has_feature(something_we_dont_have)
  11 #error Bad
  12 #endif
  13
  14 #if  !__has_builtin(__builtin_huge_val) || \
  15      !__has_builtin(__builtin_shufflevector) || \
  16      !__has_builtin(__builtin_convertvector) || \
  17      !__has_builtin(__builtin_trap) || \
  18      !__has_builtin(__c11_atomic_init) || \
  19      !__has_builtin(__builtin_launder) || \
  20      !__has_feature(attribute_analyzer_noreturn) || \
  21      !__has_feature(attribute_overloadable)
  22 #error Clang should have these
  23 #endif
  24
  25 // These are technically implemented as keywords, but __has_builtin should
  26 // still return true.
  27 #if !__has_builtin(__builtin_LINE) || \
  28     !__has_builtin(__builtin_FILE) || \
  29     !__has_builtin(__builtin_FILE_NAME) || \
  30     !__has_builtin(__builtin_FUNCTION) || \
  31     !__has_builtin(__builtin_COLUMN) || \
  32     !__has_builtin(__builtin_types_compatible_p)
  33 #error Clang should have these
  34 #endif
  35
  36 #ifdef MS
  37 #if !__has_builtin(__builtin_FUNCSIG)
  38 #error Clang should have this
  39 #endif
  40 #elif __has_builtin(__builtin_FUNCSIG)
  41 #error Clang should not have this without '-fms-extensions'
  42 #endif
  43
  44 // These are C++-only builtins.
  45 #if __has_builtin(__array_rank) || \
  46     __has_builtin(__underlying_type) || \
  47     __has_builtin(__is_trivial)
  48 #error Clang should not have these in C mode
  49 #endif
  50
  51 #if __has_builtin(__builtin_insanity)
  52 #error Clang should not have this
  53 #endif
  54
  55 #if !__has_feature(__attribute_deprecated_with_message__)
  56 #error Feature name in double underscores does not work
  57 #endif
  58
  59 // Make sure we have x86 builtins only (forced with target triple).
  60
  61 #if !__has_builtin(__builtin_ia32_emms) || \
  62     __has_builtin(__builtin_altivec_abs_v4sf)
  63 #error Broken handling of target-specific builtins
  64 #endif
  65
  66 // Macro expansion does not occur in the parameter to __has_builtin,
  67 // __has_feature, etc. (as is also expected behaviour for ordinary
  68 // macros), so the following should not expand:
  69
  70 #define MY_ALIAS_BUILTIN __c11_atomic_init
  71 #define MY_ALIAS_FEATURE attribute_overloadable
  72
  73 #if __has_builtin(MY_ALIAS_BUILTIN) || __has_feature(MY_ALIAS_FEATURE)
  74 #error Alias expansion not allowed
  75 #endif
  76
  77 // But deferring should expand:
  78
  79 #define HAS_BUILTIN(X) __has_builtin(X)
  80 #define HAS_FEATURE(X) __has_feature(X)
  81
  82 #if !HAS_BUILTIN(MY_ALIAS_BUILTIN) || !HAS_FEATURE(MY_ALIAS_FEATURE)
  83 #error Expansion should have occurred
  84 #endif
  85
  86 #ifdef VERIFY
  87 // expected-error@+1 {{builtin feature check macro requires a parenthesized identifier}}
  88 #if __has_feature('x')
  89 #endif
  90
  91 // The following are not identifiers:
  92 _Static_assert(!__is_identifier("string"), "oops");
  93 _Static_assert(!__is_identifier('c'), "oops");
  94 _Static_assert(!__is_identifier(123), "oops");
  95 _Static_assert(!__is_identifier(int), "oops");
  96
  97 // The following are:
  98 _Static_assert(__is_identifier(abc /* comment */), "oops");
  99 _Static_assert(__is_identifier /* comment */ (xyz), "oops");
 100
 101 // expected-error@+1 {{too few arguments}}
 102 #if __is_identifier()
 103 #endif
 104
 105 // expected-error@+1 {{too many arguments}}
 106 #if __is_identifier(,())
 107 #endif
 108
 109 // expected-error@+1 {{missing ')' after 'abc'}}
 110 #if __is_identifier(abc xyz) // expected-note {{to match this '('}}
 111 #endif
 112
 113 // expected-error@+1 {{missing ')' after 'abc'}}
 114 #if __is_identifier(abc())   // expected-note {{to match this '('}}
 115 #endif
 116
 117 // expected-error@+1 {{missing ')' after '.'}}
 118 #if __is_identifier(.abc)    // expected-note {{to match this '('}}
 119 #endif
 120
 121 // expected-error@+1 {{nested parentheses not permitted in '__is_identifier'}}
 122 #if __is_identifier((abc))
 123 #endif
 124
 125 // expected-error@+1 {{missing '(' after '__is_identifier'}} expected-error@+1 {{expected value}}
 126 #if __is_identifier
 127 #endif
 128
 129 // expected-error@+1 {{unterminated}} expected-error@+1 {{expected value}}
 130 #if __is_identifier(
 131 #endif
 132
 133 #endif