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Re: huia and moa versus old PG branches

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Dave Page <dpage(at)pgadmin(dot)org>
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 13:51:31
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Lists: pgsql-hackers
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 ?

			regards, tom lane

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