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[Bug target/32437] [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
- From: "richard at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Jun 2007 12:26:40 -0000
- Subject: [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/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #21 from richard at codesourcery dot com 2007-06-30 12:26 -------
Subject: Re: [4.3 Regression] MIPS: FAIL in gcc.dg/cleanup-[8|9|10|11].c
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
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32437