RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-20 19:42:54 +02:00
Code Issues Projects Releases Wiki Activity
Mirror of https://github.com/RPCS3/llvm-mirror
164,149 Commits 4 Branches 5 Tags 704 MiB
C++ 96.9%
C 1%
Python 1%
CMake 0.6%
OCaml 0.2%
Other 0.1%
dd3a0683bf
Go to file
Alexander Richardson dd3a0683bf Emit a left-shift instead of a power-of-two multiply for jump-tables 
Summary:
SelectionDAGLegalize::ExpandNode() inserts an ISD::MUL when lowering a
BR_JT opcode. While many backends optimize this multiply into a shift, e.g.
the MIPS backend currently always lowers this into a sequence of
load-immediate+multiply+mflo in MipsSETargetLowering::lowerMulDiv().

I initially changed the multiply to a shift in the MIPS backend but it
turns out that would not have handled the MIPSR6 case and was a lot more
code than doing it in LegalizeDAG.
I believe performing this simple optimization in LegalizeDAG instead of
each individual backend is the better solution since this also fixes other
backeds such as MSP430 which calls the multiply runtime function
__mspabi_mpyi without this patch.

Reviewers: sdardis, atanasyan, pftbest, asl

Reviewed By: sdardis

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45760

llvm-svn: 332439
2018-05-16 08:58:26 +00:00
bindings [LLVM-C] Consolidate llgo's DIBuilder Bindings 2018-05-10 21:10:06 +00:00
cmake [CMake] Use CMAKE_OBJCOPY and CMAKE_STRIP to externalize debug info 2018-05-09 00:07:42 +00:00
docs Docs: Fix the title underline too short. 2018-05-14 13:54:39 +00:00
examples s/LLVM_ON_WIN32/_WIN32/, llvm 2018-04-29 00:45:03 +00:00
include Revert "Signal handling should be signal-safe" 2018-05-16 04:36:37 +00:00
lib Emit a left-shift instead of a power-of-two multiply for jump-tables 2018-05-16 08:58:26 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [CMake] Enable warnings for runtimes 2018-04-27 15:10:50 +00:00
test Emit a left-shift instead of a power-of-two multiply for jump-tables 2018-05-16 08:58:26 +00:00
tools [llvm-exegesis] Analysis: Display sched class for instructions. 2018-05-16 08:47:21 +00:00
unittests Use perfect forwarding to deduplicate code in unit test. NFC. 2018-05-15 20:08:15 +00:00
utils remove output xml incase it is leftover from another run 2018-05-16 00:37:00 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format
.clang-tidy
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore
CMakeLists.txt Remove LLVM_INSTALL_CCTOOLS_SYMLINKS 2018-04-24 15:41:02 +00:00
CODE_OWNERS.TXT [CODE_OWNERS] Update my email address. 2018-04-23 19:09:49 +00:00
configure
CREDITS.TXT Update my email address and description. 2018-04-29 01:13:57 +00:00
LICENSE.TXT
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)
================================

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.