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Sjoerd Meijer 2ef8508947 [ARM] Thumb2: ConstantMaterializationCost 
Constants can also be materialised using the negated value and a MVN, and this
case seem to have been missed for Thumb2. To check the constant materialisation
costs, we now call getT2SOImmVal twice, once for the original constant and then
also for its negated value, and this function checks if the constant can both
be splatted or rotated.

This was revealed by a test that optimises for minsize: instead of a LDR
literal pool load and having a literal pool entry, just a MVN with an immediate
is smaller (and also faster).

Differential Revision: https://reviews.llvm.org/D57327

llvm-svn: 352737
2019-01-31 08:38:06 +00:00
benchmarks
bindings Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
cmake Revert "[CMake] Unify scripts for generating VCS headers" 2019-01-31 07:12:43 +00:00
docs [libFuzzer] update docs 2019-01-31 01:47:29 +00:00
examples Fix some warnings on MSVC 2019-01-27 18:41:40 +00:00
include [SelectionDAG] Codesize: don't expand SHIFT to SHIFT_PARTS 2019-01-31 08:07:30 +00:00
lib [ARM] Thumb2: ConstantMaterializationCost 2019-01-31 08:38:06 +00:00
projects Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
resources
runtimes Revert "[CMake] Use __libc_start_main rather than fopen when checking for C library" 2019-01-28 19:26:41 +00:00
test [ARM] Thumb2: ConstantMaterializationCost 2019-01-31 08:38:06 +00:00
tools [llvm-objcopy][NFC] More error propagation (linkToBuildIdDir) 2019-01-30 18:13:30 +00:00
unittests GlobalISel: Allow bitcount ops to have different result type 2019-01-31 02:09:57 +00:00
utils Reland "gn build: Add BPF target." 2019-01-31 00:42:02 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitattributes
.gitignore gitignore: ignore clangd index files. 2019-01-25 14:05:18 +00:00
CMakeLists.txt Revert "[CMake] Unify scripts for generating VCS headers" 2019-01-31 07:12:43 +00:00
CODE_OWNERS.TXT [llvm-mca] Move llvm-mca library to llvm/lib/MCA. 2018-12-17 08:08:31 +00:00
configure
CREDITS.TXT Remove a period from CREDITS.TXT (testing email change). NFC 2019-01-19 09:07:38 +00:00
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
README.txt
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +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
documentation setup.

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