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Re: [RFC][PATCH] Extend DCE to remove unnecessary new/delete-pairs

From: Marc Glisse <marc dot glisse at inria dot fr>
To: David Malcolm <dmalcolm at redhat dot com>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Sun, 13 May 2018 16:16:32 +0200 (CEST)
Subject: Re: [RFC][PATCH] Extend DCE to remove unnecessary new/delete-pairs
References: <8305B5F4-2A96-4698-8C2E-3255658B5C12@theobroma-systems.com> <CAFiYyc2nZ4vSGa5d_ni0km2kwUtyd9+BScrKzxKdbhZV=t6d1g@mail.gmail.com> <20171122103742.GN14653@tucnak> <BC60F078-9257-4E4F-8D94-7C41F7C7B802@theobroma-systems.com> <ec89be92-a232-5e34-e482-493b9babb65b@gmail.com> <20171129083045.GX2353@tucnak> <f6e7d0ed-4709-5e66-5bec-16d4e7c61ac0@gmail.com> <1511972121.27881.39.camel@redhat.com>

On Wed, 29 Nov 2017, David Malcolm wrote:

I was experimenting with optimizing away matching malloc/free pairs,
moving the allocation to either the stack, or to a thread-local
obstack, under certain conditions, or to hoist allocations out of
loops.

I didn't get any significant wins, but much of this was due to my lack
of experience with the middle-end, and being drawn back to front-
end/diagnostic improvements.


Hello,

could you share what you have? Is this something you might work on againat some point?

I had a go (very limited) at this problem some years ago, and would beinterested in looking at your approach.


--
Marc Glisse

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