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Re: writing a new pass: association with an option string

From: Diego Novillo <dnovillo at redhat dot com>
To: "Andrea Callia D'Iddio" <andrea dot calliadiddio at gmail dot com>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 04 Dec 2006 08:14:06 -0500
Subject: Re: writing a new pass: association with an option string
References: <9625a8490612040048j6d1a2a4age08f5f5205b49cee@mail.gmail.com>

Andrea Callia D'Iddio wrote on 12/04/06 03:48:

Dear all,
I wrote a new pass for gcc. Actually the pass is always executed, but
I'd like to execute it only if I specify an option from shell (ex. gcc
--mypass pippo.c). How can I do?

Create a new flag in common.opt and read its value in the gate function of your pass. I *believe* this is documented somewher in the internals manual, but I'm not sure.

You can check how other passes do it. See, for instance, flag_tree_vectorize in common.opt and in the vectorizer's gating predicate.

Follow-Ups:
- Re: writing a new pass: association with an option string
  - From: Revital1 Eres
- Re: writing a new pass: association with an option string
  - From: Ben Elliston

References:
- writing a new pass: association with an option string
  - From: Andrea Callia D'Iddio

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