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Philip Reames ffb679618c [GC] Loosen ordering on statepoint reloads to allow CSE 
We just removed a broken duplicate elimination algorithm in D75964, and after landed that it occurred to me that duplicate elimination is simply CSE. SelectionDAG has a build in CSE, so why wasn't that triggering? Well, it turns out we were overly conservative in the memory states for our reloads and CSE (rightly) considers the incoming memory state for a load part of the identity of the load.

By loosening the chain and allowing reordering, we also allow CSE. As shown in the test case, doing iterative CSE as we go is enough to eliminate duplicate stores in later statepoints as well. We key our (block local) slot map by SDValue, so commoning a previous pair of loads at construction time means we also common following stores.

Differential Revision: https://reviews.llvm.org/D76013
2020-03-11 12:30:06 -07:00
benchmarks
bindings [LLVM-C] Add bindings for addCoroutinePassesToExtensionPoints 2020-02-24 20:15:51 +01:00
cmake [clang][cmake] Include generated rst files in html built by docs-clang-html target 2020-03-05 21:30:37 -08:00
docs Fix internal links in Kaleidoscope tutorial 2020-03-09 15:07:44 -06:00
examples [ORC][examples] Fix ThinLtoJIT example after changes in 85fb997659b. 2020-02-20 11:15:08 -08:00
include [llvm][CodeGen] IR intrinsics for SVE2 contiguous conflict detection instructions. 2020-03-11 18:28:02 +00:00
lib [GC] Loosen ordering on statepoint reloads to allow CSE 2020-03-11 12:30:06 -07:00
projects Add few docs and implementation of strcpy and strcat. 2019-10-04 17:30:54 +00:00
resources
runtimes [runtimes] Add umbrella targets for runtimes 2020-02-12 09:46:14 -08:00
test [GC] Loosen ordering on statepoint reloads to allow CSE 2020-03-11 12:30:06 -07:00
tools [NFC][llvm-dwarfdump] Always use 'const Twine &' 2020-03-10 12:58:59 +01:00
unittests [Object][unittest] Skip tests on machines with non-64 bit size_t 2020-03-11 15:31:30 +00:00
utils Change to individual pretty printer classes, remove generic make_printer. 2020-03-11 15:04:03 +01:00
.clang-format
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Continue removing llgo. 2020-02-10 10:33:58 -08:00
CMakeLists.txt Revert abb00753 "build: reduce CMake handling for zlib" (PR44780) 2020-03-03 11:03:09 +01:00
CODE_OWNERS.TXT Remove myself from CODE_OWNERS. 2020-02-25 11:59:29 +00:00
configure
CREDITS.TXT Update email address. 2019-07-17 07:02:02 +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. 2019-10-03 14:57:49 +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.