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Amara Emerson eecd26ab7d [AArch64][GlobalISel] Optimize compare and branch cases with G_INTTOPTR and unknown values. 
Since we have distinct types for pointers and scalars, G_INTTOPTRs can sometimes
obstruct attempts to find constant source values. These usually come about when
try to do some kind of null pointer check. Teaching getConstantVRegValWithLookThrough
about this operation allows the CBZ/CBNZ optimization to catch more cases.

This change also improves the case where we can't find a constant source at all.
Previously we would emit a cmp, cset and tbnz for that. Now we try to just emit
a cmp and conditional branch, saving an instruction.

The cumulative code size improvement of this change plus D64354 is 5.5% geomean
on arm64 CTMark -O0.

Differential Revision: https://reviews.llvm.org/D64377

llvm-svn: 365690
2019-07-10 19:21:43 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings [IR/DIVar] Add the flag for params that have unmodified value 2019-06-26 11:19:26 +00:00
cmake Retire VS2015 Support 2019-07-09 10:10:48 +00:00
docs docs/GithubMove.rst: Remove obsolete information 2019-07-10 15:39:37 +00:00
examples [ORC] Add custom IR compiler configuration to LLJITBuilder to enable obj caches. 2019-07-10 17:24:24 +00:00
include Revert "[System Model] [TTI] Update cache and prefetch TTI interfaces" 2019-07-10 18:25:58 +00:00
lib [AArch64][GlobalISel] Optimize compare and branch cases with G_INTTOPTR and unknown values. 2019-07-10 19:21:43 +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 Setup testing target dependencies for default runtimes 2019-06-11 00:25:57 +00:00
test [AArch64][GlobalISel] Optimize compare and branch cases with G_INTTOPTR and unknown values. 2019-07-10 19:21:43 +00:00
tools [Support] Move llvm::MemoryBuffer to sys::fs::file_t 2019-07-10 00:34:13 +00:00
unittests Recommit "[CommandLine] Remove OptionCategory and SubCommand caches from the Option class." 2019-07-10 17:57:05 +00:00
utils gn build: Merge r365687 2019-07-10 19:20:17 +00:00
.arcconfig
.clang-format
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitattributes
.gitignore gitignore: Ignore Qt Creator project configuration files. NFC 2019-06-12 08:28:31 +00:00
CMakeLists.txt Fix issues building libraries as more than one type with Xcode 2019-07-08 18:29:29 +00:00
CODE_OWNERS.TXT Update email address in CODE_OWNERS 2019-07-01 16:01:15 +00:00
configure
CREDITS.TXT [test commit] Add my name to the CREDITS.TXT 2019-05-27 07:48:28 +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 Testing commit access 2019-02-19 20:38:51 +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
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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