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Mirror of https://github.com/RPCS3/llvm-mirror
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Nirav Dave 683dada7c5 Prevent construction of cycle in DAG store merge 
When merging stores in DAGCombiner, add check to ensure that no
dependenices exist that would cause the construction of a cycle in our
DAG.  This may happen if one store has a data dependence on another
instruction (e.g. a load) which itself has a (chain) dependence on
another store being merged. These stores cannot be merged safely and
doing so results in a cycle that is discovered in LegalizeDAG.

This test is only done in cases where Antialias analysis is used (UseAA)
as non-AA store merge candidates will be merged logically after all
loads which have been checked to not alias.

Reviewers: ahatanak, spatel, niravd, arsenm, hfinkel, tstellarAMD, jyknight

Subscribers: llvm-commits, tberghammer, danalbert, srhines

Differential Revision: http://reviews.llvm.org/D18336

llvm-svn: 264461
2016-03-25 21:06:30 +00:00
bindings bindings/go: reinstate TargetMachine.TargetData 2016-03-15 05:04:06 +00:00
cmake cmake: include what you use 2016-03-08 18:56:00 +00:00
docs [Kaleidoscope] Rename Error -> LogError in Chapters 2-5. 2016-03-25 17:41:26 +00:00
examples [Kaleidoscope] Rename Error -> LogError in Chapters 2-5. 2016-03-25 17:41:26 +00:00
include Prevent construction of cycle in DAG store merge 2016-03-25 21:06:30 +00:00
lib Prevent construction of cycle in DAG store merge 2016-03-25 21:06:30 +00:00
projects Remove autoconf support 2016-01-26 21:29:08 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test Prevent construction of cycle in DAG store merge 2016-03-25 21:06:30 +00:00
tools [Object] Start threading Error through MachOObjectFile construction. 2016-03-25 17:25:34 +00:00
unittests [SetVector] Add erase() method 2016-03-25 19:28:08 +00:00
utils fix IR function name regex to allow hyphens 2016-03-25 17:00:12 +00:00
.arcconfig
.clang-format
.clang-tidy adding readability-identifier-naming to llvm clang-tidy configuration. 2015-12-08 17:44:51 +00:00
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt llvm-shlib: Remove the option to override __cxa_atexit 2016-03-14 21:54:45 +00:00
CODE_OWNERS.TXT Add self to CODE_OWNERS 2016-03-08 19:01:15 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +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
README.txt Revert previous test commit. 2016-01-04 19:13:29 +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.