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Craig Topper 9d3d840987 [SelectionDAG] Teach SelectionDAGBuilder's getUniformBase for gather/scatter handling to accept GEPs with more than 2 operands if the middle operands are all 0s 
Currently we can only get a uniform base from a simple GEP with 2 operands. This causes us to miss address folding opportunities for simple global array accesses as the test case shows.

This patch adds support for larger GEPs if the other indices are 0 since those don't require any additional computations to be inserted.

We may also want to handle constant splats of zero here, but I'm leaving that for future work when I have a real world example.

Differential Revision: https://reviews.llvm.org/D39911

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317947 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-10 22:50:50 +00:00
bindings Update go bindings to use new functions from rL317135. 2017-11-02 10:22:26 +00:00
cmake Add a Cross-compilation toolchain file for MSVC. 2017-11-09 20:38:16 +00:00
docs [AMDGPU] AMDGPUUsage.rst minor corrections 2017-11-10 20:51:43 +00:00
examples Fix broken links to the Itanium CXX ABI 2017-09-12 00:19:11 +00:00
include Expand IRBuilder interface for atomic memcpy to require pointer alignments. (NFC) 2017-11-10 19:38:12 +00:00
lib [SelectionDAG] Teach SelectionDAGBuilder's getUniformBase for gather/scatter handling to accept GEPs with more than 2 operands if the middle operands are all 0s 2017-11-10 22:50:50 +00:00
projects [debuginfo-tests] Make debuginfo-tests work in a standard configuration. 2017-11-10 20:57:57 +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] Fix the variable name 2017-11-08 23:44:27 +00:00
test [SelectionDAG] Teach SelectionDAGBuilder's getUniformBase for gather/scatter handling to accept GEPs with more than 2 operands if the middle operands are all 0s 2017-11-10 22:50:50 +00:00
tools [llvm-cvtres] Add support for ARM64 2017-11-10 22:27:41 +00:00
unittests [cfi-verify] Made FileAnalysis operate on a GraphResult rather than build one and validate it. 2017-11-10 21:00:22 +00:00
utils [debuginfo-tests] Make debuginfo-tests work in a standard configuration. 2017-11-10 20:57:57 +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 gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt [debuginfo-tests] Make debuginfo-tests work in a standard configuration. 2017-11-10 20:57:57 +00:00
CODE_OWNERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Add myself to CREDITS.txt 2017-09-18 14:33:39 +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 access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +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.