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f461f21edc
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Matthew Simpson f461f21edc [LV] Avoid emitting trivially dead instructions 
Some instructions from the original loop, when vectorized, can become trivially
dead. This happens because of the way we structure the new loop. For example,
we create new induction variables and induction variable "steps" in the new
loop. Thus, when we go to vectorize the original induction variable update, it
may no longer be needed due to the instructions we've already created. This
patch prevents us from creating these redundant instructions. This reduces code
size before simplification and allows greater flexibility in code generation
since we have fewer unnecessary instruction uses.

Differential Revision: https://reviews.llvm.org/D25631

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284631 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-19 19:22:02 +00:00
bindings DebugInfo: change alignment type from uint64_t to uint32_t to save space. 2016-10-18 14:31:22 +00:00
cmake [docs] Increase minimum supported GCC version for building LLVM to 4.8 2016-10-18 17:17:37 +00:00
docs [docs] Increase minimum supported GCC version for building LLVM to 4.8 2016-10-18 17:17:37 +00:00
examples [Kaleidoscope] Make Chapter 2 use llvm::make_unique, rather than a helper. 2016-09-19 23:00:27 +00:00
include [AliasSetTracker] Add support for memcpy and memmove. 2016-10-19 19:09:03 +00:00
lib [LV] Avoid emitting trivially dead instructions 2016-10-19 19:22:02 +00:00
projects [CMake] Correct configuration order of the sub-projects based on ther dependancies 2016-10-09 20:38:29 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake] Fixing lit for runtimes directory 2016-09-15 06:14:13 +00:00
test [LV] Avoid emitting trivially dead instructions 2016-10-19 19:22:02 +00:00
tools [llvm-cov] Don't spawn a thread unless ThreadCount > 1 2016-10-19 17:55:44 +00:00
unittests [ADT] Zip range adapter 2016-10-19 18:02:21 +00:00
utils Improve tablegen gen-subtarget diagnostics for missing machine models. 2016-10-18 04:17:44 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: ignore VS Code editor files 2016-09-02 22:54:26 +00:00
CMakeLists.txt [cmake] Declare LLVM_CMAKE_PATH for use in subprojects 2016-10-19 12:18:34 +00:00
CODE_OWNERS.TXT Take ownership of libLTO as discussed on llvm-dev. 2016-09-15 17:42:39 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Shamelessly add myself to CREDITS.TXT 2016-08-04 16:28:22 +00:00
LICENSE.TXT Remove autoconf references from LICENSE.TXT 2016-08-12 20:11:03 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
README.txt Revert rL277454 2016-08-02 13:26:07 +00:00
RELEASE_TESTERS.TXT Adding RELEASE_TESTERS.TXT 2016-07-21 16:46:44 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
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 are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.