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LLVM backend for 6502
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Chandler Carruth d54f9a4c3b Move the instruction simplification of callsite arguments in the inliner 
to instead rely on much more generic and powerful instruction
simplification in the function cloner (and thus inliner).

This teaches the pruning function cloner to use instsimplify rather than
just the constant folder to fold values during cloning. This can
simplify a large number of things that constant folding alone cannot
begin to touch. For example, it will realize that 'or' and 'and'
instructions with certain constant operands actually become constants
regardless of what their other operand is. It also can thread back
through the caller to perform simplifications that are only possible by
looking up a few levels. In particular, GEPs and pointer testing tend to
fold much more heavily with this change.

This should (in some cases) have a positive impact on compile times with
optimizations on because the inliner itself will simply avoid cloning
a great deal of code. It already attempted to prune proven-dead code,
but now it will be use the stronger simplifications to prove more code
dead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153403 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-25 04:03:40 +00:00
autoconf Remove the C backend. 2012-03-23 05:50:46 +00:00
bindings [python] Add negative MemoryBuffer testcase 2012-03-22 11:23:52 +00:00
cmake Minimal changes for LLVM to compile under VS11. 2012-03-01 22:42:52 +00:00
docs Add a small release not about the range metadata. 2012-03-24 19:02:32 +00:00
examples Switch to a more idiomatic way of silencing unused variable warnings in 2012-02-20 00:02:49 +00:00
include Use the isReachableFromEntry method. 2012-03-24 23:29:27 +00:00
lib Move the instruction simplification of callsite arguments in the inliner 2012-03-25 04:03:40 +00:00
projects Remove the C backend. 2012-03-23 05:50:46 +00:00
runtime Fixing a warning in MSVC (this is also a test commit) 2012-02-05 19:43:39 +00:00
test Move the instruction simplification of callsite arguments in the inliner 2012-03-25 04:03:40 +00:00
tools Include cctype for std::isprint. 2012-03-23 11:49:32 +00:00
unittests Revert a series of commits to MCJIT to get the build working in CMake 2012-03-22 05:44:06 +00:00
utils Include cstdio in a few place that depended on getting it transitively through StringExtras.h 2012-03-23 11:35:30 +00:00
.gitignore git: Add tools/lldb to the ignore list. 2011-11-10 22:55:50 +00:00
CMakeLists.txt Remove the C backend. 2012-03-23 05:50:46 +00:00
configure Remove the C backend. 2012-03-23 05:50:46 +00:00
CREDITS.TXT sort by alpha. 2012-03-12 21:12:59 +00:00
LICENSE.TXT Happy new year 2012! 2012-01-01 08:16:56 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Makefile: add missing files to FilesToConfig 2012-01-17 02:56:49 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in Add profiling support for Intel Parallel Amplifier XE (VTune) for JITted code in LLVM. 2012-03-13 08:33:15 +00:00
Makefile.rules Use a posix compliant regexp in export file construction. 2012-03-12 20:58:14 +00:00
README.txt test commit 2012-03-20 13:12:38 +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.

If you're writing a package for LLVM, see docs/Packaging.html for our
suggestions.