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Re: Designs for better debug info in GCC
On Nov 24, 2007, "Richard Guenther" <richard.guenther@gmail.com> wrote:
> Generated code shouldn't change if we allocate extra DECL_UIDs, but
> only possibly if we change DECL_UID ordering. (If that is the
> problem, as I remember your analysis)
That is indeed the problem, but I'm not sure your requirement is
feasible. If we permit DECL_UID divergence, it means we can't use
DECL_UID for hashing any more. Since they already stand for hashable
proxies for the decl pointers, I don't see what we'd gain by
introducing yet another hashable uid that's stable across -g.
What do you suggest us to use for hashing? Or do you suggest us to do
away with hashing and use sorted set or map data structures?
--
Alexandre Oliva http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member http://www.fsfla.org/
Red Hat Compiler Engineer aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist oliva@{lsd.ic.unicamp.br, gnu.org}