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Mirror of https://github.com/RPCS3/llvm-mirror
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Dan Gohman b0339af0e1 Use range metadata instead of introducing selects. 
When GlobalOpt has determined that a GlobalVariable only ever has two values,
it would convert the GlobalVariable to a boolean, and introduce SelectInsts
at every load, to choose between the two possible values. These SelectInsts
introduce overhead and other unpleasantness.

This patch makes GlobalOpt just add range metadata to loads from such
GlobalVariables instead. This enables the same main optimization (as seen in
test/Transforms/GlobalOpt/integer-bool.ll), without introducing selects.

The main downside is that it doesn't get the memory savings of shrinking such
GlobalVariables, but this is expected to be negligible.

llvm-svn: 204076
2014-03-17 19:57:04 +00:00
autoconf Remove projects/sample. 2014-03-12 22:40:22 +00:00
bindings [python-bindings] Remove some cruft that snuck in. 2014-02-23 04:43:26 +00:00
cmake [CMake][cygming] Disable --out-implib from executables. 2014-03-16 13:51:24 +00:00
docs [docs] Add links to XMOS XCore documentation. 2014-03-14 15:53:50 +00:00
examples Fix warnings about an variable only used in asserts. 2014-03-06 06:35:46 +00:00
include Really REALLY finish adding const to the MachineRegisterInfo iterator range methods. 2014-03-17 19:34:51 +00:00
lib Use range metadata instead of introducing selects. 2014-03-17 19:57:04 +00:00
projects Remove projects/sample. 2014-03-12 22:40:22 +00:00
test Use range metadata instead of introducing selects. 2014-03-17 19:57:04 +00:00
tools [C++11] Introduce ObjectFile::symbols() to use range-based loops. 2014-03-17 07:28:19 +00:00
unittests [PM] As was pointed out in review, I need to define a custom swap in 2014-03-13 10:42:18 +00:00
utils Replace ValueTypes.h with MachineValueType.h if possible. 2014-03-15 09:11:41 +00:00
.arcconfig
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.gitignore Remove projects/sample. 2014-03-12 22:40:22 +00:00
CMakeLists.txt static link polly into tools 2014-03-14 04:04:14 +00:00
CODE_OWNERS.TXT Update my e-mail address in CODE_OWNERS.TXT 2014-03-13 18:04:41 +00:00
configure Remove projects/sample. 2014-03-12 22:40:22 +00:00
CREDITS.TXT Fix documentation typos 2013-12-20 00:33:39 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile Provide CMake package modules in install tree 2014-02-09 16:37:02 +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 a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
Makefile.rules Use -std=gnu++11 on cygwin and mingw. 2014-03-12 20:01:15 +00:00
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +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.