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From: "gjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/49857] Put constant switch-tables into flash
Date: Sun, 29 Jan 2012 16:24:00 -0000	[thread overview]
Message-ID: <bug-49857-4-fPrYMs40NU@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-49857-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49857

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |tree-optimization

--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-01-29 14:55:48 UTC ---
Changed component from "target" to "tree-optimization" because:

The code in tree-switch-conversion.c needs to be extended by, say, a target
hook that queries the backend for the right address space for the generated
lookup table, i.e. the CSWTCH.num objects.

This is needed for two reasons:

1) The data (CSWTCH.num) has to be located in the preferred section,
   i.e. in Flash and not in RAM.

2) The accesses have to use the right instructions, i.e. instructions to read
from non-generic address space (Flash) and not instructions to access generic
address space (RAM).


  parent reply	other threads:[~2012-01-29 14:56 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-26 20:50 [Bug target/49857] New: " gjl at gcc dot gnu.org
2011-07-26 20:57 ` [Bug target/49857] " eric.weddington at atmel dot com
2011-12-01 12:49 ` eric.weddington at atmel dot com
2012-01-07 12:23 ` gjl at gcc dot gnu.org
2012-01-29 16:24 ` gjl at gcc dot gnu.org [this message]
2012-01-29 17:42 ` [Bug rtl-optimization/49857] " steven at gcc dot gnu.org
2012-01-29 18:32 ` steven at gcc dot gnu.org
2013-03-22 14:45 ` jakub at gcc dot gnu.org
2013-05-31 10:59 ` jakub at gcc dot gnu.org
2013-06-01 13:41 ` gjl at gcc dot gnu.org
2014-04-22 11:37 ` jakub at gcc dot gnu.org
2014-04-22 14:30 ` gjl at gcc dot gnu.org
2015-04-22 12:06 ` jakub at gcc dot gnu.org
2015-07-16  9:18 ` rguenth at gcc dot gnu.org

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