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LLVM backend for 6502
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Andrew Trick 8adae96fd9 Evict local live ranges if they can be reassigned. 
The previous change to local live range allocation also suppressed
eviction of local ranges. In rare cases, this could result in more
expensive register choices. This commit actually revives a feature
that I added long ago: check if live ranges can be reassigned before
eviction. But now it only happens in rare cases of evicting a local
live range because another local live range wants a cheaper register.

The benefit is improved code size for some benchmarks on x86 and armv7.

I measured no significant compile time increase and performance
changes are noise.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187140 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-25 18:35:19 +00:00
autoconf No ',' between programs. 2013-07-08 21:18:54 +00:00
bindings We're in 3.4 land now. 2013-05-07 20:31:28 +00:00
cmake Tweak the cmake interaction between CMAKE_BUILD_TYPE and LLVM_ENABLE_ASSERTIONS. 2013-07-17 09:34:51 +00:00
docs Speling. 2013-07-24 20:47:57 +00:00
examples Adding example source to support MCJIT/Kaleidoscope blog posts. 2013-07-22 18:47:24 +00:00
include Add a way to add a kind-value string pair to an attribute. 2013-07-25 18:34:24 +00:00
lib Evict local live ranges if they can be reassigned. 2013-07-25 18:35:19 +00:00
projects The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
runtime Remove "-Wl,-seg1addr -Wl,0xE0000000" from link options. 2013-06-04 15:26:37 +00:00
test Evict local live ranges if they can be reassigned. 2013-07-25 18:35:19 +00:00
tools Replace the "NoFramePointerElimNonLeaf" target option with a function attribute. 2013-07-25 00:34:29 +00:00
unittests Don't end a file name with a dot. It looks odd. 2013-07-25 15:00:17 +00:00
utils Fix a bug in TableGen where the intrinsic function name recognizer could mis-identify names if one was a prefix substring of the other 2013-07-25 12:32:00 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:07:58 +00:00
.gitignore Add extra vim swap file pattern 2012-10-09 23:48:34 +00:00
CMakeLists.txt Tweak the cmake interaction between CMAKE_BUILD_TYPE and LLVM_ENABLE_ASSERTIONS. 2013-07-17 09:34:51 +00:00
CODE_OWNERS.TXT Add more owners to CODE_OWNERS.TXT (Kostya Serebryany: AddressSanitizer and ThreadSanitizer; Evgeniy Stepanov: MemorySanitizer) 2013-06-27 08:47:12 +00:00
configure No ',' between programs. 2013-07-08 21:18:54 +00:00
CREDITS.TXT Identify me on IRC. 2013-06-18 22:09:36 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +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 Fix regular expression used by 'make update' to only look for 'I' and '?' at the start of svn info results and to check for spaces after 'I' instead of just after '?'. 2013-07-03 14:48:37 +00:00
Makefile.common Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD. 2013-07-01 08:07:52 +00:00
README.txt test 2013-04-17 05:34:03 +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 documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

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