Re: [C PATCH] Make attributes accept enum values (PR c/50459)

[Jason Merrill <jason at redhat dot com>]

On 04/15/2014 03:56 PM, Marek Polacek wrote:
> The testsuite doesn't hit this code with C++, but does hit this code
> with C.  The thing is, if we have e.g.
> enum { A = 128 };
> void *fn1 (void) __attribute__((assume_aligned (A)));
> then handle_assume_aligned_attribute walks the attribute arguments
> and gets the argument via TREE_VALUE.  If this argument is an enum
> value, then for C the argument is identifier_node that contains const_decl,

Ah.  Then I think the C parser should be fixed to check 
attribute_takes_identifier_p and look up the argument if false.

Jason