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Re: [PATCH] Fix LRA ICE (PR middle-end/70219)

From: Jeff Law <law at redhat dot com>
To: Jakub Jelinek <jakub at redhat dot com>, Vladimir Makarov <vmakarov at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Mon, 14 Mar 2016 15:47:18 -0600
Subject: Re: [PATCH] Fix LRA ICE (PR middle-end/70219)
Authentication-results: sourceware.org; auth=none
References: <20160314213257 dot GP3017 at tucnak dot redhat dot com>

On 03/14/2016 03:32 PM, Jakub Jelinek wrote:

Hi!

The newly added assert in delete_move_and_clobber requires dregno > 0,
but dregno == 0 is also normal (e.g. in the testcase below we get dregno ==
0, because it uses %rax).  Only dregno < 0 is special and we shouldn't see
it here.

Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?

2016-03-14  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/70219
	* lra-constraints.c (delete_move_and_clobber): Change assertion
	to also allow dregno == 0.

	* gcc.dg/pr70219.c: New test.

OK.

Jeff

References:
- [PATCH] Fix LRA ICE (PR middle-end/70219)
  - From: Jakub Jelinek

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