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Roman Lebedev 4792a641c6 Reland [InstCombine] Fold ((X - Y) - Z) to X - (Y + Z) (PR49858) 
This reverts commit a547b4e26b311e417cd51100e379693f51a3f448,
relanding commit 31d219d2997fed1b7dc97e0adf170d5aaf65883e,
which was reverted because there was a conflicting inverse transform,
which was causing an endless combine loop, which has now been adjusted.

Original commit message:

https://alive2.llvm.org/ce/z/67w-wQ

We prefer `add`s over `sub`, and this particular xform
allows further folds to happen:

Fixes https://bugs.llvm.org/show_bug.cgi?id=49858
2021-04-07 12:06:25 +03:00
benchmarks
bindings [NFC][OCaml] Reformat to clean up following CAMLprim removal 2021-04-05 10:55:08 +01:00
cmake Revert "llvm-shlib: Create object libraries for each component and link against them" 2021-04-05 10:46:19 -07:00
docs [TableGen] [docs] Correct a couple of mistakes; use 'true' and 'false' in examples 2021-04-05 09:15:58 -04:00
examples Opaque pointers: Migrate examples to use load with explicit type 2021-04-03 14:03:42 -07:00
include [X86] Initialize TargetOptions::StackProtectorGuardOffset member to its default value 2021-04-07 09:04:25 +02:00
lib Reland [InstCombine] Fold ((X - Y) - Z) to X - (Y + Z) (PR49858) 2021-04-07 12:06:25 +03:00
projects llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
resources
runtimes [runtimes] Add the libc project to the list of runtimes. 2021-03-23 17:33:03 +00:00
test Reland [InstCombine] Fold ((X - Y) - Z) to X - (Y + Z) (PR49858) 2021-04-07 12:06:25 +03:00
tools [dsymutil] Don't emit .debug_pubnames and .debug_pubtypes 2021-04-06 19:01:45 -07:00
unittests [SplitEdge] Update SplitCriticalEdge to return a nullptr only when the edge is not critical 2021-04-06 21:24:40 +00:00
utils [lit testing] Fix xfail-cl.py test worker count 2021-04-06 20:48:18 +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 [clangd] Store index in '.cache/clangd/index' instead of '.clangd/index' 2020-07-07 14:53:45 +02:00
CMakeLists.txt [mlgo] fix build rules 2021-04-03 12:49:03 -07:00
CODE_OWNERS.TXT [M68k][CODE_OWNERS](0/8) Add code owner for the M68k target 2021-03-08 12:30:56 -08:00
configure
CREDITS.TXT [NFC] Add contributors names to CREDITS.TXT 2020-10-07 13:22:55 -04:00
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
README.txt Test commit. 2020-03-14 18:08:26 -07:00
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.