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Sam Parker bc49de227d [DAGCombine] Move AND nodes to multiple load leaves 
Recommitting rL319773, which was reverted due to a recursive issue
causing timeouts. This happened because I failed to check whether
the discovered loads could be narrowed further. In the case of a tree
with one or more narrow loads, that could not be further narrowed, as
well as a node that would need masking, an AND could be introduced
which could then be visited and recombined again with the same load.
This could again create the masking load, with would be combined
again... We now check that the load can be narrowed so that this
process stops.

Original commit message:
Search from AND nodes to find whether they can be propagated back to
loads, so that the AND and load can be combined into a narrow load.
We search through OR, XOR and other AND nodes and all bar one of the
leaves are required to be loads or constants. The exception node then
needs to be masked off meaning that the 'and' isn't removed, but the
loads(s) are narrowed still.

Differential Revision: https://reviews.llvm.org/D41177

llvm-svn: 320679
2017-12-14 09:31:01 +00:00
bindings Update go bindings to use new functions from rL317135. 2017-11-02 10:22:26 +00:00
cmake [CMake] Pass LLVM_HAVE_LINK_VERSION_SCRIPT to external projects 2017-12-13 23:49:51 +00:00
docs [CodeGen] Print jump-table index operands as %jump-table.0 in both MIR and debug output 2017-12-13 10:30:59 +00:00
examples [CMake] Use PRIVATE in target_link_libraries for executables 2017-12-05 21:49:56 +00:00
include [LV] Support efficient vectorization of an induction with redundant casts 2017-12-14 07:56:31 +00:00
lib [DAGCombine] Move AND nodes to multiple load leaves 2017-12-14 09:31:01 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [runtimes] Add install-*-stripped targets 2017-12-08 19:42:46 +00:00
test [DAGCombine] Move AND nodes to multiple load leaves 2017-12-14 09:31:01 +00:00
tools Recover some overzealously removed includes. 2017-12-13 22:21:02 +00:00
unittests Remove redundant includes from unittests. 2017-12-13 21:31:05 +00:00
utils Remove redundant includes from utils/TableGen. 2017-12-13 21:31:13 +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
.gitattributes [MC] Fix regression tests on Windows when git “core.autocrlf” is set to true. 2017-11-17 21:59:43 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
CODE_OWNERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00
configure
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
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)
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