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Re: [RFC][gomp4] Offloading patches (2/3): Add tables generation

From: Bernd Schmidt <bernds at codesourcery dot com>
To: "Michael V. Zolotukhin" <michael dot v dot zolotukhin at gmail dot com>, Jakub Jelinek <jakub at redhat dot com>, Thomas Schwinge <thomas at codesourcery dot com>, Richard Biener <rguenther at suse dot de>, Kirill Yukhin <kirill dot yukhin at gmail dot com>, Ilya Verbin <iverbin at gmail dot com>, Andrey Turetskiy <andrey dot turetskiy at gmail dot com>, Ilya Tocar <tocarip dot intel at gmail dot com>, gcc <gcc-patches at gcc dot gnu dot org>
Date: Tue, 28 Jan 2014 12:20:27 +0100
Subject: Re: [RFC][gomp4] Offloading patches (2/3): Add tables generation
Authentication-results: sourceware.org; auth=none
References: <20131217113957 dot GA39975 at msticlxl57 dot ims dot intel dot com>

On 12/17/2013 12:39 PM, Michael V. Zolotukhin wrote:

Here is a patch 2/3: Add tables generation.

This patch is just a slightly modified patch sent a couple of weeks ago.  When
compiling with '-fopenmp' compiler generates a special symbol, containing
addresses and sizes of globals/omp_fn-functions, and places it into a special
section.  Later, at linking, these sections are merged together and we get a
single table with all addresses/sizes for entire binary.  Also, in this patch we
start to pass '__OPENMP_TARGET__' symbol to GOMP_target calls.

I also have a question about the code in this patch. I can see how thetable is constructed - what's not clear to me is how it is going to beused? How do you map from a function or variable you want to look up toan index in this table?



Bernd

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