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Chandler Carruth f9694a106c Simplify the PHI node operand rewriting. 
Previously, the code would scan the PHI nodes and build up a small
setvector of candidate value pairs in phi nodes to go and rewrite. Once
certain the rewrite could be performed, the code walks the set, and for
each one re-scans the entire PHI node list looking for nodes to rewrite
operands.

Instead, scan the PHI nodes once to check for hazards, and then scan it
a second time to rewrite the operands to selects. No set vector, and
a max of two scans.

The only downside is that we might form identical selects, but
instcombine or anything else should fold those easily, and it seems
unlikely to happen often.

llvm-svn: 173337
2013-01-24 10:40:51 +00:00
autoconf Disable Uninitialized Use Warnings for Broken gcc Versions 2013-01-15 18:21:15 +00:00
bindings [python] Add markup option to disassembler 2012-12-01 21:57:30 +00:00
cmake Add time getters to the process interface for requesting the elapsed 2013-01-04 23:19:55 +00:00
docs Fix small typo 2013-01-23 22:05:19 +00:00
examples Update links to "Itanium C++ ABI: Exception Handling" document 2013-01-13 15:53:09 +00:00
include Add asserts to SmallVector so that calls to front() and back() only succeed 2013-01-24 04:29:24 +00:00
lib Simplify the PHI node operand rewriting. 2013-01-24 10:40:51 +00:00
projects Clean up the sample include orderings, not that it really matters... 2012-12-04 10:46:21 +00:00
runtime libprofile/CommonProfiling.c: Fix according to C89. 2012-11-02 01:32:02 +00:00
test [asan] adaptive redzones for globals (the larger the global the larger is the redzone) 2013-01-24 10:35:40 +00:00
tools llvm-symbolizer: factor out bits of the tool into separate LLVMSymbolize.{h,cpp} files. No functionality change. 2013-01-22 14:21:19 +00:00
unittests llvm/unittests: Use OwningPtr to fix --vg-leak. 2013-01-23 08:33:13 +00:00
utils Add the IR attribute 'sspstrong'. 2013-01-23 06:41:41 +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 Fix spelling 2012-12-13 15:25:07 +00:00
CODE_OWNERS.TXT Update CODE_OWNERS.TXT. 2013-01-15 09:37:45 +00:00
configure Disable Uninitialized Use Warnings for Broken gcc Versions 2013-01-15 18:21:15 +00:00
CREDITS.TXT Update my email address. 2012-11-29 21:17:26 +00:00
LICENSE.TXT Add LICENSE.TXT covering contributions made by ARM. 2013-01-07 10:04:49 +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 Update the root Makefile for VMCore -> IR. Missed by my original search 2013-01-02 09:27:25 +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 Introduce llvm::sys::getProcessTriple() function. 2013-01-16 17:27:22 +00:00
Makefile.rules Pass NO_MISSING_FIELD_INITIALIZERS to Compiler Flags 2013-01-18 23:22:52 +00:00
README.txt Update README.txt to more accurately reflect reality. 2013-01-08 02:35:15 +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.