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Stanislav Mekhanoshin 3a97f30b01 [AMDGPU] Do not allow register coalescer to create big superregs 
Limit register coalescer by not allowing it to artificially increase
size of registers beyond dword. Such super-registers are in fact
register sequences and not distinct HW registers.

With more super-regs we would need to allocate adjacent registers
and constraint regalloc more than needed. Moreover, our super
registers are overlapping. For instance we have VGPR0_VGPR1_VGPR2,
VGPR1_VGPR2_VGPR3, VGPR2_VGPR3_VGPR4 etc, which complicates registers
allocation even more, resulting in excessive spilling.

Differential Revision: https://reviews.llvm.org/D28782

llvm-svn: 292413
2017-01-18 17:30:05 +00:00
bindings Fix go bindings after r289702 (hopefully, don't really know how to build 2016-12-15 06:54:29 +00:00
cmake Enabled -fsanitize-address-use-after-scope for -DLLVM_USE_SANITIZER=Address 2017-01-17 21:04:23 +00:00
docs [libFuzzer] better link for trophies 2017-01-18 00:45:02 +00:00
examples BrainF example: fixing output buffering issue 2017-01-17 13:27:28 +00:00
include GlobalISel: Correct copy-pasted comment. NFC 2017-01-18 17:28:41 +00:00
lib [AMDGPU] Do not allow register coalescer to create big superregs 2017-01-18 17:30:05 +00:00
projects [CMake] Correct configuration order of the sub-projects based on ther dependancies 2016-10-09 20:38:29 +00:00
resources
runtimes [CMake] Handle common options for runtimes build 2017-01-10 19:47:05 +00:00
test [AMDGPU] Do not allow register coalescer to create big superregs 2017-01-18 17:30:05 +00:00
tools [ARM] Create objdump subtarget from build attrs 2017-01-18 13:52:12 +00:00
unittests [ARM] Create objdump subtarget from build attrs 2017-01-18 13:52:12 +00:00
utils Re-revert: [globalisel] Tablegen-erate current Register Bank Information 2017-01-18 14:26:12 +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
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore [AVR] Add the integrated testing tool to the .gitignore 2016-12-14 11:47:14 +00:00
CMakeLists.txt Bump trunk version to 5.0.0svn 2017-01-12 21:22:36 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take ownership of IR Linker as discussed on llvm-dev 2016-12-02 14:06:53 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Revert revision 289721. 2016-12-14 21:58:42 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit, deleted empty line at the end of README.txt 2016-11-07 18:31:21 +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.