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Dorit Nuzman 2fc6728513 [LoopVectorize] Make interleaved-accesses analysis less conservative about 
possible pointer-wrap-around concerns, in some cases.

Before this patch, collectConstStridedAccesses (part of interleaved-accesses
analysis) called getPtrStride with [Assume=false, ShouldCheckWrap=true] when
examining all candidate pointers. This is too conservative. Instead, this
patch makes collectConstStridedAccesses use an optimistic approach, calling
getPtrStride with [Assume=true, ShouldCheckWrap=false], and then, once the
candidate interleave groups have been formed, revisits the pointer-wrapping
analysis but only where it matters: namely, in groups that have gaps, and where
the gaps are not at the very end of the group (in which case the loop is
peeled). This second time getPtrStride is called with [Assume=false,
ShouldCheckWrap=true], but this could further be improved to using Assume=true,
once we also add the logic to track that we are not going to meet the scev
runtime checks threshold.

Differential Revision: https://reviews.llvm.org/D25276

llvm-svn: 285517
2016-10-30 12:23:26 +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 [libFuzzer] mention one more trophie 2016-10-28 22:03:54 +00:00
examples [BuildingAJIT] Use the remote target triple to construct the TargetMachine in 2016-10-19 22:41:03 +00:00
include [ThinLTO] Use per-summary flag to prevent exporting locals used in inline asm 2016-10-30 05:40:44 +00:00
lib [LoopVectorize] Make interleaved-accesses analysis less conservative about 2016-10-30 12:23:26 +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 [LoopVectorize] Make interleaved-accesses analysis less conservative about 2016-10-30 12:23:26 +00:00
tools [Polly] Remove the unused POLLY_LINK_LIBS for linking polly into 2016-10-30 06:07:59 +00:00
unittests Resubmit "Add support for advanced number formatting." 2016-10-29 00:27:22 +00:00
utils [utils] Add a '--unified-report' option to the code coverage prep script 2016-10-26 22:07:39 +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
.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
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.