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Simon Pilgrim ba759cb550 [InstCombine] Folding of shifts by the sum of positive values 
This patch introduces the combine:

(C1 shift (A add C2)) -> ((C1 shift C2) shift A)
iff A and C2 are both positive

If both A and C2 are know to be positive then we can safely split into 2 shifts, permitting the folding of the Inner shift.

Fix for the spec benchmark case mentioned by @nadav on PR15141 (assuming we can prove that the inputs as positive).

Differential Revision: https://reviews.llvm.org/D26000

llvm-svn: 285696
2016-11-01 15:40:30 +00:00
bindings [Go bindings] Update for r284678 API changes. 2016-10-20 09:14:39 +00:00
cmake cmake: Enable the lto cache when building with -flto=thin on darwin 2016-10-28 20:48:47 +00:00
docs [docs] remove more non-ascii stuff in the hopes to fix the bot 2016-11-01 05:51:12 +00:00
examples [BuildingAJIT] Use the remote target triple to construct the TargetMachine in 2016-10-19 22:41:03 +00:00
include [PowerPC] Implement vector shift builtins - llvm portion 2016-11-01 09:42:32 +00:00
lib [InstCombine] Folding of shifts by the sum of positive values 2016-11-01 15:40:30 +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] Make the runtimes directory work with bootstrap builds 2016-10-19 21:50:25 +00:00
test [InstCombine] Folding of shifts by the sum of positive values 2016-11-01 15:40:30 +00:00
tools [ThinLTO] Disable importing and other cross-module optis at -O0 2016-10-31 22:12:21 +00:00
unittests Attempt to pacify buildbot 2016-11-01 07:52:10 +00:00
utils Fix per-processor model scheduler definition completeness check 2016-10-31 18:59:52 +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: Rename installhdrs to install-llvm-headers and fix the dependencies 2016-10-24 21:58:58 +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.