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Re: [PATCH 5/6] combine: handle REG_UNUSED in reg_dead_at_p (PR59278)

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
Date: Mon, 01 Dec 2014 10:38:16 -0700
Subject: Re: [PATCH 5/6] combine: handle REG_UNUSED in reg_dead_at_p (PR59278)
Authentication-results: sourceware.org; auth=none
References: <cover dot 1417135737 dot git dot segher at kernel dot crashing dot org> <2722d25dd8dd4c358b092a67c28042d3e9d93af5 dot 1417135738 dot git dot segher at kernel dot crashing dot org>

On 11/27/14 18:44, Segher Boessenkool wrote:

Currently reg_dead_at_p returns 0 for registers that are set but never
used.  This patch repairs that oversight.  This fixes PR59278.


2014-11-27  Segher Boessenkool  <segher@kernel.crashing.org>

gcc/
	PR rtl-optimization/59278
	combine (reg_dead_at_p): Consider REG_UNUSED notes.

OK with a testcase. ISTM you can just create an SH specific testcasefrom the code in the BZ. Pre-approved with suitable testcase.


jeff

Follow-Ups:
- Re: [PATCH 5/6] combine: handle REG_UNUSED in reg_dead_at_p (PR59278)
  - From: Oleg Endo

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