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Craig Topper 0858057f74 [RISCV] Move SHFLI matching to DAG combine. Add 32-bit support for RV64 
We previously used isel patterns for this, but that used quite
a bit of space in the isel table due to OR being associative
and commutative. It also wouldn't handle shifts/ands being in
reversed order.

This generalizes the shift/and matching from GREVI to
take the expected mask table as input so we can reuse it for
SHFLI.

There is no SHFLIW instruction, but we can promote a 32-bit
SHFLI to i64 on RV64. As long as bit 4 of the control bit isn't
set, a 64-bit SHFLI will preserve 33 sign bits if the input had
at least 33 sign bits. ComputeNumSignBits has been updated to
account for that to avoid sext.w in the tests.

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D96661
2021-02-19 10:07:12 -08:00
benchmarks
bindings [Go] Fix bindings/go/llvm/IRBindings.cpp 2020-12-16 10:09:58 -08:00
cmake [cmake] Move check for libproc to config-ix.cmake 2021-02-18 10:54:27 +01:00
docs [docs] Fix the GlobalISel/GenericOpcode.rst 2021-02-19 10:31:31 +01:00
examples [Draft] [examples] Move llvm/examples/OCaml-Kaleidoscope/ to llvm-archive 2021-02-11 06:52:24 +05:30
include [NFC][Regalloc] Share the VirtRegAuxInfo object with LiveRangeEdit 2021-02-19 07:44:28 -08:00
lib [RISCV] Move SHFLI matching to DAG combine. Add 32-bit support for RV64 2021-02-19 10:07:12 -08:00
projects llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
resources
runtimes [CMake] Delete LLVM_RUNTIME_BUILD_ID_LINK_TARGETS 2021-02-15 11:06:23 -08:00
test [RISCV] Move SHFLI matching to DAG combine. Add 32-bit support for RV64 2021-02-19 10:07:12 -08:00
tools [llvm-dwarfdump][locstats] Unify handling of inlined vars with no loc 2021-02-19 05:38:01 -08:00
unittests Reland "[Debugify] Make the debugify aware of the original (-g) Debug Info" 2021-02-18 23:29:22 -08:00
utils [gn build] Port 1a2b3536efef 2021-02-19 07:23:48 -05:00
.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 [cmake] Move check for libproc to config-ix.cmake 2021-02-18 10:54:27 +01:00
CODE_OWNERS.TXT Change XCore code owner. 2021-01-14 12:13:48 +00:00
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.