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Sanjay Patel ab450c2c65 [InstCombine] canonicalize add/sub with bool 
add A, sext(B) --> sub A, zext(B)

We have to choose 1 of these forms, so I'm opting for the
zext because that's easier for value tracking.

The backend should be prepared for this change after:
D57401
rL353433

This is also a preliminary step towards reducing the amount
of bit hackery that we do in IR to optimize icmp/select.
That should be waiting to happen at a later optimization stage.

The seeming regression in the fuzzer test was discussed in:
D58359

We were only managing that fold in instcombine by luck, and
other passes should be able to deal with that better anyway.

llvm-svn: 354748
2019-02-24 16:57:45 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings [bindings/go] Fix building on 32-bit systems (ARM etc.) 2019-02-16 22:33:10 +00:00
cmake CMake: Fix stand-alone clang builds since r353268 2019-02-20 01:11:05 +00:00
docs [NFC] Fix typos: preceeding -> preceding 2019-02-23 01:28:32 +00:00
examples [Kaleidoscope] Fix symbol resolver to search in reverse order. 2019-02-21 16:53:04 +00:00
include VFS: Avoid some unnecessary std::string copies 2019-02-23 23:48:47 +00:00
lib [InstCombine] canonicalize add/sub with bool 2019-02-24 16:57:45 +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 [CMake][runtimes] Set clang-header dependency for builtins 2019-02-20 23:06:10 +00:00
test [InstCombine] canonicalize add/sub with bool 2019-02-24 16:57:45 +00:00
tools [obj2yaml] - Do not miss section index for special symbols. 2019-02-22 08:45:21 +00:00
unittests Try again to fix memory leak in r354692 2019-02-23 03:25:37 +00:00
utils [GN] Updated build file to allow GN builds to succeed at ToT. 2019-02-22 18:45:41 +00:00
.arcconfig
.clang-format
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore [clangd] Store index in '.clangd/index' instead of '.clangd-index' 2019-02-20 19:08:06 +00:00
CMakeLists.txt [CMake] Honor LLVM_EXTERNAL_<proj>_SOURCE_DIR 2019-02-22 21:19:48 +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 second test on git-llvm-push 2019-02-19 22:06:27 +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,
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LLVM is open source software. You may freely distribute it under the terms of
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Please see the documentation provided in docs/ for further
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