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Simon Pilgrim c007d602eb [SLPVectorizer] Add initial alternate opcode support for cast instructions. (REAPPLIED) 
We currently only support binary instructions in the alternate opcode shuffles.

This patch is an initial attempt at adding cast instructions as well, this raises several issues that we probably want to address as we continue to generalize the alternate mechanism:

1 - Duplication of cost determination - we should probably add scalar/vector costs helper functions and get BoUpSLP::getEntryCost to use them instead of determining costs directly.
2 - Support alternate instructions with the same opcode (e.g. casts with different src types) - alternate vectorization of calls with different IntrinsicIDs will require this.
3 - Allow alternates to be a different instruction type - mixing binary/cast/call etc.
4 - Allow passthrough of unsupported alternate instructions - related to PR30787/D28907 'copyable' elements.

Reapplied with fix to only accept 2 different casts if they come from the same source type.

Differential Revision: https://reviews.llvm.org/D49135

llvm-svn: 336812
2018-07-11 15:05:10 +00:00
bindings [LLVM-C] [OCaml] Remove LLVMAddBBVectorizePass 2018-05-28 16:58:10 +00:00
cmake [CMake] Teach the build system to codesign built products 2018-07-10 17:32:48 +00:00
docs [TableGen] Add a general-purpose JSON backend. 2018-07-11 08:40:19 +00:00
examples [ORC] Update JITCompileCallbackManager to support multi-threaded code. 2018-05-30 01:57:45 +00:00
include Recommit r334887: [SmallSet] Add SmallSetIterator. 2018-07-11 13:39:59 +00:00
lib [SLPVectorizer] Add initial alternate opcode support for cast instructions. (REAPPLIED) 2018-07-11 15:05:10 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [CMake] Set per-runtime library directory suffix in runtimes build 2018-07-10 19:13:33 +00:00
test [SLPVectorizer] Add initial alternate opcode support for cast instructions. (REAPPLIED) 2018-07-11 15:05:10 +00:00
tools [llvm-mca] Use a different character to flag instructions with side-effects in the Instruction Info View. NFC 2018-07-11 12:44:44 +00:00
unittests Recommit r334887: [SmallSet] Add SmallSetIterator. 2018-07-11 13:39:59 +00:00
utils [TableGen] Add a general-purpose JSON backend. 2018-07-11 08:40:19 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format
.clang-tidy
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore
CMakeLists.txt [CMake] Teach the build system to codesign built products 2018-07-10 17:32:48 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take ownership of the MIPS backend 2018-06-21 09:59:44 +00:00
configure
CREDITS.TXT Update my information in the CREDITS file. 2018-06-15 20:02:11 +00:00
LICENSE.TXT Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit: remove a blank line 2018-06-08 21:21:55 +00:00
RELEASE_TESTERS.TXT Remove myself from the release testers list. (NFC) 2018-06-20 21:25:50 +00:00

README.txt 

The LLVM Compiler Infrastructure
================================

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
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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