diff options
Diffstat (limited to 'gcc/c-family/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-family/c-cppbuiltin.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/c-family/c-cppbuiltin.c b/gcc/c-family/c-cppbuiltin.c index 48cbefd..ce88e70 100644 --- a/gcc/c-family/c-cppbuiltin.c +++ b/gcc/c-family/c-cppbuiltin.c @@ -741,6 +741,20 @@ cpp_atomic_builtins (cpp_reader *pfile) builtin_define_with_int_value ("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", targetm.atomic_test_and_set_trueval); + /* Macros for C++17 hardware interference size constants. Either both or + neither should be set. */ + gcc_assert (!param_destruct_interfere_size + == !param_construct_interfere_size); + if (param_destruct_interfere_size) + { + /* FIXME The way of communicating these values to the library should be + part of the C++ ABI, whether macro or builtin. */ + builtin_define_with_int_value ("__GCC_DESTRUCTIVE_SIZE", + param_destruct_interfere_size); + builtin_define_with_int_value ("__GCC_CONSTRUCTIVE_SIZE", + param_construct_interfere_size); + } + /* ptr_type_node can't be used here since ptr_mode is only set when toplev calls backend_init which is not done with -E or pch. */ psize = POINTER_SIZE_UNITS; |