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Re: Can we speed up the gcc_target structure?

From: DJ Delorie <dj at redhat dot com>
To: rth at redhat dot com
Cc: ian at wasabisystems dot com, gcc at gcc dot gnu dot org
Date: Mon, 19 Jan 2004 14:32:19 -0500
Subject: Re: Can we speed up the gcc_target structure?
References: <20040118083738.10772.qmail@gossamer.airs.com> <200401181357.i0IDvpWF004706@caip.rutgers.edu> <Pine.LNX.4.58.0401182111570.9475@digraph.polyomino.org.uk> <20040118220522.GA14767@redhat.com> <20040118222201.GD11268@atrey.karlin.mff.cuni.cz> <20040118223751.GB14927@redhat.com>

> > What is preventing us from declaring the structure as constant so we
> > should get propagation even with current design?
> 
> Targets that modify the structure at startup.

Maybe I'm misremembering, but wasn't one of the goals of using the
target structure to be able to switch them at runtime?  If so, a
command line argument could change the pointer to point to a different
structure, which completely invalidates all such optimizations.

Follow-Ups:
- Re: Can we speed up the gcc_target structure?
  - From: Richard Henderson

References:
- Can we speed up the gcc_target structure?
  - From: Ian Lance Taylor
- Re: Can we speed up the gcc_target structure?
  - From: Kaveh R. Ghazi
- Re: Can we speed up the gcc_target structure?
  - From: Joseph S. Myers
- Re: Can we speed up the gcc_target structure?
  - From: Richard Henderson
- Re: Can we speed up the gcc_target structure?
  - From: Jan Hubicka
- Re: Can we speed up the gcc_target structure?
  - From: Richard Henderson

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