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Re: Local optimization on i386 ?

To: Jamie Lokier <egcs at tantalophile dot demon dot co dot uk>
Subject: Re: Local optimization on i386 ?
From: Richard Henderson <rth at cygnus dot com>
Date: Tue, 30 Nov 1999 16:56:45 -0800
Cc: Marc Espie <espie at quatramaran dot ens dot fr>, law at cygnus dot com, egcs at egcs dot cygnus dot com
References: <26996.943919594@upchuck> <199911301338.OAA04341@quatramaran.ens.fr> <19991201005538.B21063@pcep-jamie.cern.ch>

On Wed, Dec 01, 1999 at 12:55:38AM +0100, Jamie Lokier wrote:
> And tons of wasted space in the stack frame -- is
> GCC aligning every 4 byte structure to 16 bytes for a reason?

No it isn't.  But you may well have gotten stack slots allocated
for variables that were subsequently optimized away.  We can't
currently compact the stack frame when this happens.

r~

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References:
- Re: Local optimization on i386 ?
  - From: Jeffrey A Law
- Re: Local optimization on i386 ?
  - From: Marc Espie
- Re: Local optimization on i386 ?
  - From: Jamie Lokier

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