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Date: Thu, 18 Dec 2014 21:16:00 -0000
Message-ID: <CAAfDdZ1=BqKgGEXU-zL762tUKP7CpdYVD_VY2Sun4Us7L6bsYA@mail.gmail.com>
Subject: Re: [PATCH] PR 62173, re-shuffle insns for RTL loop invariant hoisting
From: Jiong Wang <wong.kwongyuan.tools@gmail.com>
To: Jiong Wang <jiong.wang@arm.com>
Cc: Richard Biener <richard.guenther@gmail.com>, 	"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
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2014-12-18 17:00 GMT+00:00 Jiong Wang <jiong.wang@arm.com>:
>>>> ok for trunk?
>>>>
>>>> gcc/
>>>> PR62173
>>>>      loop-invariant.c.c (expensive_addr): New hash_table.
>>>>      (need_expensive_addr_check_p): New bool.
>>>>      (find_exits): Rename to "find_exists_and_reshuffle.
>>>>      Support re-shuffle instructions for better loop invariant hoisting.

another question is, is it safe to re-use REG_DEAD info here without
calling df_note_add_problem and df_analysis first?
am I using those info passed down from the previous pass which
calculated these info and maybe broken?