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LLVM backend for 6502
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Evan Cheng 20b0abc24f Copy coalescing change to prevent a physical register from being pin to a 
long live interval that has low usage density.
1. Change order of coalescing to join physical registers with virtual
   registers first before virtual register intervals become too long.
2. Check size and usage density to determine if it's worthwhile to join.
3. If joining is aborted, assign virtual register live interval allocation
   preference field to the physical register.
4. Register allocator should try to allocate to the preferred register
   first (if available) to create identify moves that can be eliminated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36218 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-17 20:32:26 +00:00
autoconf Hack the shared library extension for dylib. The existing code just looks 2007-04-11 00:33:43 +00:00
docs Remove "ModulePasses requiring FunctionPasses" from the list of future 2007-04-17 00:17:11 +00:00
examples Revert last patch. The examples build now. 2007-03-06 17:26:14 +00:00
include Copy coalescing change to prevent a physical register from being pin to a 2007-04-17 20:32:26 +00:00
lib Copy coalescing change to prevent a physical register from being pin to a 2007-04-17 20:32:26 +00:00
projects avoid collision with /usr/bin/sample if this ever gets installed. 2007-02-18 03:03:41 +00:00
runtime crtend is only for llvm-gcc3, remove it. 2007-02-23 19:34:09 +00:00
test New test case. 2007-04-17 20:29:12 +00:00
tools Regenerate. 2007-04-16 03:05:01 +00:00
utils For PR1328: 2007-04-16 06:54:34 +00:00
win32 Track new header file. 2007-04-08 21:19:52 +00:00
Xcode Update project 2007-01-29 18:45:08 +00:00
.cvsignore Add llvm.spec, a generated file. 2006-10-18 19:23:56 +00:00
configure Hopefully fix LTDL_SHLIB_EXT on Darwin 2007-04-11 00:27:39 +00:00
CREDITS.TXT Add Roman to credits 2007-03-21 21:45:25 +00:00
LICENSE.TXT remove these. 2007-02-25 02:28:21 +00:00
llvm.spec.in Minor technical correction in documentation. 2006-08-21 01:58:57 +00:00
Makefile Echo command lines only if the user wants them. 2007-04-15 06:22:48 +00:00
Makefile.common Update comments to reflect new variable names. Patch contributed by 2005-02-14 16:02:19 +00:00
Makefile.config.in For PR789: 2007-03-29 19:05:44 +00:00
Makefile.rules Removed tabs everywhere except autogenerated & external files. Add make 2007-04-16 18:10:23 +00:00
README.txt Make the text of this file a little more useful. 2004-09-02 22:49:27 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level 
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments. 

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the HTML documentation provided in docs/index.html for further
assistance with LLVM.