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LLVM backend for 6502
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Chris Lattner 3bf6815556 enhance x-(-A) -> x+A to preserve NUW/NSW. 
Use the presence of NSW/NUW to fold "icmp (x+cst), x" to a constant in
cases where it would otherwise be undefined behavior.

Surprisingly (to me at least), this triggers hundreds of the times in
a few benchmarks: lencode, ldecode, and 466.h264ref seem to *really*
like this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91812 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-21 04:04:05 +00:00
autoconf Fix typos. Thanks to John Tytgat for noticing it! 2009-12-07 00:27:35 +00:00
bindings Fix another parallel make race condition. 2009-12-18 20:12:14 +00:00
cmake CMake: Update lib deps. 2009-12-19 21:27:30 +00:00
docs Add more detail for getting started on Windows. 2009-12-17 17:18:11 +00:00
examples fix PR5649 by making fib use the JIT instead of the interpreter, patch by Perry Lorier! 2009-12-01 01:56:27 +00:00
include Fixed use of phi param in SlotIndex constructors. 2009-12-19 23:32:32 +00:00
lib enhance x-(-A) -> x+A to preserve NUW/NSW. 2009-12-21 04:04:05 +00:00
projects Move DataTypes.h to include/llvm/System, update all users. This breaks the last 2009-10-26 01:35:46 +00:00
runtime OptimalEdgeProfiling: Creation of profiles. 2009-09-01 19:03:44 +00:00
test enhance x-(-A) -> x+A to preserve NUW/NSW. 2009-12-21 04:04:05 +00:00
tools Adding a bunch of options to the mcc16 driver. 2009-12-19 13:13:29 +00:00
unittests Catch more cases of a pointer being marked garbage twice. This helps when 2009-12-18 20:35:38 +00:00
utils .llx is no more. 2009-12-19 20:56:53 +00:00
website
Xcode
build-for-llvm-top.sh
CMakeLists.txt Don't default warnings to ON on MSVC, the spew is enough to triple the build time. :/ 2009-12-01 19:11:36 +00:00
configure Fix typos. Thanks to John Tytgat for noticing it! 2009-12-07 00:27:35 +00:00
CREDITS.TXT
LICENSE.TXT Add regular expression matching support, based on OpenBSD regexec()/regcomp() 2009-08-30 08:24:09 +00:00
llvm.spec.in
Makefile Update install-clang target for clang-cc removal. 2009-12-12 21:17:54 +00:00
Makefile.common
Makefile.config.in Fix typos. Thanks to John Tytgat for noticing it! 2009-12-07 00:27:35 +00:00
Makefile.rules Add the rest of the build system logic for optional target disassemblers 2009-11-25 04:46:58 +00:00
ModuleInfo.txt
README.txt First test commit 2009-10-05 22:29:11 +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.