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Re: [Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c

From: Richard Sandiford <richard at codesourcery dot com>
To: Kenneth Zadeck <zadeck at naturalbridge dot com>
Cc: Richard Guenther <richard dot guenther at gmail dot com>, gcc-bugzilla at gcc dot gnu dot org, "Bonzini, Paolo" <bonzini at gnu dot org>, "Park, Seongbae" <seongbae dot park at gmail dot com>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Sat, 30 Jun 2007 13:26:32 +0100
Subject: Re: [Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
References: <bug-32437-7151@http.gcc.gnu.org/bugzilla/> <20070623021344.16771.qmail@sourceware.org> <467D4264.6090905@naturalbridge.com> <84fc9c000706230911v29c5ce81oba8d93bd370dbfae@mail.gmail.com> <467D48D6.2070508@naturalbridge.com> <87zm2lpip5.fsf@firetop.home>

Richard Sandiford <richard@codesourcery.com> writes:
> Kenneth Zadeck <zadeck@naturalbridge.com> writes:
>> 2007-06-23  Kenneth Zadeck <zadeck@naturalbridge.com>
>>
>>     PR middle-end/32437
>>     *dce.c (deletable_insn_p): Add extra parameter and recurse if insn
>>     is a PARALLEL.
>>     (prescan_insns_for_dce): Add extra parameter.
>
> Kenny found that this patch introduced problems on x86 (I think it was)
> because it applied the special handling for bare CLOBBERs to those
> inside PARALLELs as well.  We don't want that; bare USEs and CLOBBERs
> are special DF markers, but USEs and CLOBBERs inside PARALLELs are parts
> of asms or define_insns.
>
> Kenny pre-approved the patch below.  Bootstrapped & regression-tested
> on x86_64-linux-gnu.  Applied to mainline.

This patch apparently caused 32475 to resurface, so I reverted it.

Richard

References:
- Re: [Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
  - From: Kenneth Zadeck
- Re: [Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
  - From: Richard Guenther
- Re: [Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
  - From: Kenneth Zadeck
- Re: [Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
  - From: Richard Sandiford

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