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LLVM backend for 6502
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15045b6973
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Chris Lattner 15045b6973 Fold "and (LOAD P), 255" -> zextload. This allows us to compile: 
unsigned foo3(unsigned *P) { return *P & 255; }
as:
_foo3:
        lbz r3, 3(r3)
        blr

instead of:

_foo3:
        lwz r2, 0(r3)
        rlwinm r3, r2, 0, 24, 31
        blr

and:

unsigned short foo2(float a) { return a; }

as:
_foo2:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lhz r3, -2(r1)
        blr

instead of:

_foo2:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        rlwinm r3, r2, 0, 16, 31
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26417 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-28 06:35:35 +00:00
autoconf Use -emit-llvm -S to get .ll file output from llvm-gcc 2006-02-27 05:39:00 +00:00
docs Match the case of other mailing lists in the list 2006-02-23 16:18:29 +00:00
examples When a function takes a variable number of pointer arguments, with a zero 2005-10-23 04:37:20 +00:00
include/llvm Qualify dwarf namespace inside llvm namespace. 2006-02-27 22:37:23 +00:00
lib Fold "and (LOAD P), 255" -> zextload. This allows us to compile: 2006-02-28 06:35:35 +00:00
projects Convert over to the new way of handling lex/bison checked into cvs 2006-02-15 07:26:07 +00:00
runtime fix make install/uninstall of libcrtend. 2006-01-30 02:03:56 +00:00
test new testcases for PR712 2006-02-28 05:48:56 +00:00
tools Turn on loop unswitching tonight 2006-02-22 07:33:49 +00:00
utils Select inline asm memory operands. 2006-02-24 02:13:31 +00:00
win32 Inform Visual Studio of deleted file. 2006-02-17 02:11:34 +00:00
Xcode Catch up on some of the file addition/deletions. 2006-01-27 13:24:20 +00:00
.cvsignore Ignore the configure.out file generated by "make reconfigure" 2005-06-18 23:01:25 +00:00
configure Use -emit-llvm -S to get .ll file output from llvm-gcc 2006-02-27 05:39:00 +00:00
CREDITS.TXT Add an entry 2006-01-08 08:25:38 +00:00
LICENSE.TXT Happy New Year, LLVM. 2006-01-03 14:42:06 +00:00
llvm.spec Onward to LLVM-1.6 and beyond! 2005-05-18 20:23:20 +00:00
llvm.spec.in Onward to LLVM-1.6 and beyond! 2005-05-18 20:23:20 +00:00
Makefile For PR614: 2005-08-25 04:59:49 +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 Implement fix for PR471: 2005-12-21 03:31:53 +00:00
Makefile.rules Fix a minor makefile bug with lex/yacc handling that nate noticed. We don't 2006-02-16 05:10:48 +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.