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David Green 6d5c9d0658 [ARM] Alter the register allocation order for minsize on Thumb2 
Currently in Arm code, we allocate LR first, under the assumption that
it needs to be saved anyway. Unfortunately this has the disadvantage
that it will require any instructions using it to be the longer thumb2
instructions, not the shorter thumb1 ones.

This switches the order when we are optimising for minsize, returning to
the default order so that more lower registers can be used. It can end
up requiring more pushed registers, but on average produces smaller code.

Differential Revision: https://reviews.llvm.org/D56008

llvm-svn: 351938
2019-01-23 10:18:30 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
cmake Fix llvm::is_trivially_copyable portability issues 2019-01-22 13:48:55 +00:00
docs [Docs] Add a note clarifying how to get good test performances. 2019-01-22 21:52:50 +00:00
examples Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
include [Pipeliner] Add two pragmas to control software pipelining optimization 2019-01-23 03:26:10 +00:00
lib [ARM] Alter the register allocation order for minsize on Thumb2 2019-01-23 10:18:30 +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] Pass Clang defaults to runtimes builds" 2018-07-13 20:01:55 +00:00
test [ARM] Alter the register allocation order for minsize on Thumb2 2019-01-23 10:18:30 +00:00
tools [llvm-symbolizer] Allow single letter command flags grouping. 2019-01-23 09:49:37 +00:00
unittests GlobalISel: Make buildConstant handle vectors 2019-01-22 21:31:02 +00:00
utils gn build: Merge r351820. 2019-01-23 02:19:56 +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 Git ignore CLion project configuration files. NFC 2019-01-02 19:58:07 +00:00
CMakeLists.txt Revert r351324 "Build LLVM-C.dll by default on windows and enable in release package" 2019-01-16 12:36:28 +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 Test commit. 2018-09-22 01:01:03 +00:00
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.