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Jakob Stoklund Olesen 81a6995243 Partition use lists so defs always come before uses. 
This makes it possible to speed up def_iterator by stopping at the first
use. This makes def_empty() and getUniqueVRegDef() much faster when
there are many uses.

In a +Asserts build, LiveVariables is 100x faster in one case because
getVRegDef() has an assertion that would scan to the end of a
def_iterator chain.

Spill weight calculation is significantly faster (300x in one case)
because isTriviallyReMaterializable() calls MRI->isConstantPhysReg(%RIP)
which calls def_empty(%RIP).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161634 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-09 22:49:46 +00:00
autoconf Support for experimental targets 2012-08-09 01:13:59 +00:00
bindings Remove tabs. 2012-07-19 00:23:13 +00:00
cmake revert my previous patch 2012-08-08 18:04:45 +00:00
docs Sphinxify the CommandLine document. 2012-08-08 08:21:24 +00:00
examples Move llvm/Support/IRBuilder.h -> llvm/IRBuilder.h 2012-06-29 12:38:19 +00:00
include Partition use lists so defs always come before uses. 2012-08-09 22:49:46 +00:00
lib Partition use lists so defs always come before uses. 2012-08-09 22:49:46 +00:00
projects Fix a typo (the the => the) 2012-07-23 08:51:15 +00:00
runtime Free the allocated filename. Found by clang static analyzer. 2012-06-15 09:11:47 +00:00
test Partition use lists so defs always come before uses. 2012-08-09 22:49:46 +00:00
tools Remove some coding violations. No functionality change. 2012-08-08 22:03:50 +00:00
unittests Update cmake build. 2012-08-04 09:52:39 +00:00
utils Added MispredictPenalty to SchedMachineModel. 2012-08-08 02:44:16 +00:00
.gitignore Add tools/lld to .gitignore. 2012-05-02 21:25:32 +00:00
CMakeLists.txt Support for experimental targets 2012-08-09 01:13:59 +00:00
CODE_OWNERS.TXT Add the list of code owners to the top level of the LLVM source tree to 2012-07-26 08:04:09 +00:00
configure Support for experimental targets 2012-08-09 01:13:59 +00:00
CREDITS.TXT Alphabetize. 2012-06-19 23:47:58 +00:00
LICENSE.TXT Add YAML parser to Support. 2012-04-03 23:09:22 +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 Do not install llvm-config-host for cross-builds of clang. rdar://11317847 2012-05-09 00:07:02 +00:00
Makefile.common [docs] Remove unsupported references to ExtraSource variable. 2012-05-15 21:32:27 +00:00
Makefile.config.in Add a configure flag for enabling -Werror on the command line 2012-08-03 19:58:20 +00:00
Makefile.rules Add a configure flag for enabling -Werror on the command line 2012-08-03 19:58:20 +00:00
README.txt test commit 2012-07-11 17:34:12 +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.