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Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)

From: Paolo Bonzini <bonzini at gnu dot org>
To: Steven Bosscher <stevenb dot gcc at gmail dot com>
Cc: Jakub Jelinek <jakub at redhat dot com>, Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>, Kenneth dot Zadeck at naturalbridge dot com, dberlin at dberlin dot org, ebotcazou at libertysurf dot fr, gcc-patches at gcc dot gnu dot org, mark at codesourcery dot com, zadeck at naturalbridge dot com
Date: Fri, 19 Oct 2007 16:17:04 +0200
Subject: Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
Newsgroups: gmane.comp.gcc.patches
References: <4716FBED.803@codesourcery.com> <471744D8.20001@naturalbridge.com> <47178759.2000509@codesourcery.com> <10710182033.AA16378@vlsi1.ultra.nyu.edu> <571f6b510710181527n61bd537ci885768afb3c539e0@mail.gmail.com> <10710190151.AA20457@vlsi1.ultra.nyu.edu> <571f6b510710182229q54401eaby1ca945a556c9bf9c@mail.gmail.com> <10710191241.AA28222@vlsi1.ultra.nyu.edu> <571f6b510710190604y980dd40k2f6522e9c78e465e@mail.gmail.com> <20071019133543.GH5451@devserv.devel.redhat.com> <571f6b510710190701m6c9d9878t4d0b49ff9efb6fa7@mail.gmail.com>


So that would mean that you don't even need libcall notes to CSE
_tls_get_addr calls?

CALL_INSNs are never DCE'd:

static bool
deletable_insn_p (rtx insn, bool fast)
{
  rtx body, x;
  int i;

  if (!NONJUMP_INSN_P (insn))
    return false;

Paolo

Follow-Ups:
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Kenneth Zadeck
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Jakub Jelinek

References:
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Mark Mitchell
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Kenneth Zadeck
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Mark Mitchell
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Richard Kenner
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Steven Bosscher
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Richard Kenner
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Steven Bosscher
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Richard Kenner
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Steven Bosscher
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Jakub Jelinek
- Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
  - From: Steven Bosscher

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