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Re: a typo in ira-emit.c?

From: "Vladimir N. Makarov" <vmakarov at redhat dot com>
To: "Amker.Cheng" <amker dot cheng at gmail dot com>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 09 Jun 2010 22:28:58 -0400
Subject: Re: a typo in ira-emit.c?
References: <AANLkTin5evslmtSiVoD709LFh6RVo-C8HD5EtIwlLSOJ@mail.gmail.com>

On 06/09/2010 06:45 AM, Amker.Cheng wrote:

Hi :
I am studying ira right now, there is following code in change_loop
if (parent_allocno == NULL || REGNO (ALLOCNO_REG (parent_allocno)) == REGNO (original_reg)) { if (internal_flag_ira_verbose> 3&& ira_dump_file) fprintf (ira_dump_file, " %i vs parent %i:", ALLOCNO_HARD_REGNO (allocno), ALLOCNO_HARD_REGNO (parent_allocno)); set_allocno_reg (allocno, create_new_reg (original_reg)); } Is it possible that parent_allocno == NULL here? or the fprintf might broken.

Yes, I think it can be NULL in some complicated cases when a loop exit edge comes not in the parent loop.

Follow-Ups:
- Re: a typo in ira-emit.c?
  - From: Amker.Cheng

References:
- a typo in ira-emit.c?
  - From: Amker.Cheng

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