noalias.h

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#ifndef RBIMPL_ATTR_NOALIAS_H                        /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_ATTR_NOALIAS_H
#include "ruby/internal/compiler_since.h"
#include "ruby/internal/has/declspec_attribute.h"

#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 */
#endif
 
#endif /* RBIMPL_ATTR_NOALIAS_H */