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Re: [PATCH 4/9] regrename: Don't rename restores

From: Jeff Law <law at redhat dot com>
To: Segher Boessenkool <segher at kernel dot crashing dot org>, gcc-patches at gcc dot gnu dot org
Cc: bschmidt at redhat dot com
Date: Thu, 8 Sep 2016 11:51:53 -0600
Subject: Re: [PATCH 4/9] regrename: Don't rename restores
Authentication-results: sourceware.org; auth=none
References: <cover.1470015604.git.segher@kernel.crashing.org> <3d1c2c877df1da0be9eca7cb1016e8b7a7d287c8.1470015604.git.segher@kernel.crashing.org>

On 07/31/2016 07:42 PM, Segher Boessenkool wrote:

A restore is supposed to restore some certain register.  Restoring it
into some other register will not work.  Don't.

2016-06-07  Segher Boessenkool  <segher@kernel.crashing.org>

	* regrename.c (build_def_use): Invalidate chains that have a
	REG_CFA_RESTORE on some instruction.

Again, how is this different from a normal epilogue that restoresregisters which regrename seems to not muck with.


Jeff

Follow-Ups:
- Re: [PATCH 4/9] regrename: Don't rename restores
  - From: Segher Boessenkool

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