On Fri, 6 Jun 2014, FX wrote:
In fortran/trans-decl.c, we have a comment above the code building function
decls, saying:
The SPEC parameter specifies the function argument and return type
specification according to the fnspec function type attribute. */
I was away from GCC development for some time, so this is news to me. The
syntax is not immediately clear, and neither a Google search nor a grep of the
trunk’s numerous .texi files reveals any information. I’m creating new decls,
what I am to do with it?
You can look at the 2 functions in gimple.c that use gimple_call_fnspec,
and refer to tree-core.h for the meaning of EAF_*, etc. A string like
"2x." means:
'2': the first letter is about the return, here we are returning the
second argument
'x': the first argument is ignored
'.': not saying anything about the second argument.
--
Marc Glisse
