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Re: huia and moa versus old PG branches

From: Dave Page <dpage(at)pgadmin(dot)org>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org, Andrew Dunstan <andrew(at)dunslane(dot)net>
Subject: Re: huia and moa versus old PG branches
Date: 2010-08-31 14:06:35
Message-ID: AANLkTi=cX5_rC89VWKO57=VtpHTZa_Y3Zw_swWtsXWxc@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Tue, Aug 31, 2010 at 2:51 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Dave Page <dpage(at)pgadmin(dot)org> writes:
>>> On Mon, Aug 30, 2010 at 3:50 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>>> Also, although moa is actually green for 8.3, it's showing an initdb
>>>> failure in 8.4 and up ("cache lookup failed for type 0" while processing
>>>> system_views.sql).  I'm betting this is some sort of
>>>> over-aggressive-optimization problem, but it's hard to tell much from
>>>> the buildfarm logs.  Could you look into that and find out exactly where
>>>> it's failing?
>
>> Looks like -xO4 caused this. -xO3 seems to be OK in a test.
>
> Hmm.  I wonder whether -xO4 invokes something comparable to strict
> aliasing optimizations.  Does Sun Studio have anything corresponding to
> -fno-strict-aliasing ?

A quick Google gives:

-xalias_level[=l]

http://docs.sun.com/app/docs/doc/819-5265/bjaso?a=view

-- 
Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake

EnterpriseDB UK: http://www.enterprisedb.com
The Enterprise Postgres Company

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