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Re: Dummy questions on GCC internals
- From: Eric Christopher <echristo at redhat dot com>
- To: aaganichev at yandex dot ru
- Cc: gcc at gcc dot gnu dot org
- Date: 20 May 2003 22:23:40 -0700
- Subject: Re: Dummy questions on GCC internals
- Organization:
- References: <3ECB0DD5.00000F.07381@ariel.yandex.ru>
On Tue, 2003-05-20 at 22:25, Alexander Aganichev wrote:
> Hi!
>
> I have some dummy questions:-)
>
> Is there a guide with GCC internal errors explanation? I'm in
> progress of defining z80.md file and receive various
> complaints like "Unrecognizable insn". How can I determine
> what's wrong?
>
This means that the compiler is attempting to generate a particular
pattern. Unfortunately you don't have one defined that matches it. You
either need to fix this, or find a way to stop that pattern from
generating out of the backend.
> Another problem is "Internal error: abort in
> find_matching_operand" in genrecog. I'm sure it's my fault,
> but is there easy way to find it out?
>
Find the last bit of source code you modified? :)
> Also, what is the major difference between define_insn and
> define_expand ending with DONE?
>
This is in the gcc internals manual, gccint.texi or available on the
documentation page on the gcc.gnu.org website.
-eric
--
Eric Christopher <echristo@redhat.com>