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Re: Enabling -frename-registers?
- From: Bernd Schmidt <bschmidt at redhat dot com>
- To: David Edelsohn <dje dot gcc at gmail dot com>, Jeffrey Law <law at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>
- Cc: Segher Boessenkool <segher at kernel dot crashing dot org>
- Date: Fri, 29 Apr 2016 15:32:53 +0200
- Subject: Re: Enabling -frename-registers?
- Authentication-results: sourceware.org; auth=none
- References: <CAGWvnykBEjYMgOCaR_ZGLwB3fxPg-pB3WPSwAvmUBXzmXct8gg at mail dot gmail dot com>
On 04/29/2016 03:02 PM, David Edelsohn wrote:
How has this show general benefit for all architectures to deserve
enabling it by default at -O2?
It should improve postreload scheduling in general, and it can also help
clear up bad code generation left behind by register allocation.
As an aside, this change seems to be the source of a new code
generation bug affecting the PPC kernel.
Please file a PR.
Bernd