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Dehao Chen a2cdd9ac6d Add sample PGO support to ThinLTO new pass manager. 
Summary:
For SamplePGO + ThinLTO, because profile annotation is done twice at both PrepareForThinLTO pipeline and backend compiler, the following changes are needed at the PrepareForThinLTO phase to ensure the IR is not changed dramatically. Otherwise the profile annotation will be inaccurate in the backend compiler.

* disable hot-caller heuristic
* disable loop unrolling
* disable indirect call promotion

This will unblock the new PM testing for sample PGO (tools/clang/test/CodeGen/pgo-sample-thinlto-summary.c), which will be covered in another cfe patch.

Reviewers: chandlerc, tejohnson, davidxl

Reviewed By: tejohnson

Subscribers: sanjoy, mehdi_amini, Prazek, inglorion, llvm-commits

Differential Revision: https://reviews.llvm.org/D34895

llvm-svn: 307437
2017-07-07 20:53:10 +00:00
bindings [NFC] Remove multiple semicolons 2017-06-28 23:15:16 +00:00
cmake CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
docs Correct GFX9 processor names. 2017-07-07 03:10:01 +00:00
examples [ORC] Errorize the ORC APIs. 2017-07-07 02:59:13 +00:00
include Add sample PGO support to ThinLTO new pass manager. 2017-07-07 20:53:10 +00:00
lib Add sample PGO support to ThinLTO new pass manager. 2017-07-07 20:53:10 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +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][runtimes] Add install target for runtimes builtins 2017-06-02 19:38:11 +00:00
test [LoopUnrollRuntime] Support multiple exit blocks unrolling when prolog remainder generated 2017-07-07 20:12:32 +00:00
tools [llvm-pdbutil] Fix build. 2017-07-07 19:00:06 +00:00
unittests [cloning] Do not duplicate types when cloning functions 2017-07-07 18:24:20 +00:00
utils vim: add 'builtin', 'nobuiltin', 'nonnull', and 'speculatable' to the keyword list. 2017-07-07 18:28:45 +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 Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
CODE_OWNERS.TXT Remove the BBVectorize pass. 2017-06-30 07:09:08 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +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 Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +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.