diff options
Diffstat (limited to 'include/ruby/internal/attr/noalias.h')
| -rw-r--r-- | include/ruby/internal/attr/noalias.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/ruby/internal/attr/noalias.h b/include/ruby/internal/attr/noalias.h index 63324b7184..0790ef60e5 100644 --- a/include/ruby/internal/attr/noalias.h +++ b/include/ruby/internal/attr/noalias.h @@ -17,7 +17,7 @@ * recursively included from extension libraries written in C++. * Do not expect for instance `__VA_ARGS__` is always available. * We assume C99 for ruby itself but we don't assume languages of - * extension libraries. They could be written in C++98. + * extension libraries. They could be written in C++98. * @brief Defines #RBIMPL_ATTR_NOALIAS. * * ### Q&A ### @@ -46,10 +46,21 @@ * that has to be passed to the function as a pointer. ::VALUE -taking * functions thus cannot be attributed as such. */ +#include "ruby/internal/compiler_since.h" #include "ruby/internal/has/declspec_attribute.h" /** Wraps (or simulates) `__declspec((noalias))` */ -#if RBIMPL_HAS_DECLSPEC_ATTRIBUTE(noalias) +#if RBIMPL_COMPILER_BEFORE(Clang, 12, 0, 0) +# /* +# * `::llvm::Attribute::ArgMemOnly` was buggy before. Maybe because nobody +# * actually seriously used it. It seems they somehow mitigated the situation +# * in LLVM 12. Still not found the exact changeset which fiexed the +# * attribute, though. +# * +# * :FIXME: others (armclang, xlclang, ...) can also be affected? +# */ +# define RBIMPL_ATTR_NOALIAS() /* void */ +#elif RBIMPL_HAS_DECLSPEC_ATTRIBUTE(noalias) # define RBIMPL_ATTR_NOALIAS() __declspec(noalias) #else # define RBIMPL_ATTR_NOALIAS() /* void */ |