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Mirror of https://github.com/RPCS3/llvm-mirror
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Yonghong Song 7db1f58b3a bpf: Define instruction patterns for extensions and truncations between i32 to i64 
For transformations between i32 and i64, if it is explicit signed extension:
  - first cast the operand to i64
  - then use SLL + SRA to finish the extension.

if it is explicit zero extension:
  - first cast the operand to i64
  - then use SLL + SRL to finish the extension.

if it is explicit any extension:
  - just refer to 64-bit register.

if it is explicit truncation:
  - just refer to 32-bit subregister.

NOTE: Some of the zero extension sequences might be unnecessary, they will be
removed by an peephole pass on MachineInstruction layer.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
llvm-svn: 325981
2018-02-23 23:49:21 +00:00
bindings Because of CVE-2018-6574, some compiler options and linker options are restricted to prevent arbitrary code execution. 2018-02-23 20:12:24 +00:00
cmake Don't make PDBs by default in Release mode 2018-02-15 21:25:23 +00:00
docs [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
examples [ORC] Consolidate RTDyldObjectLinkingLayer GetMemMgr and GetResolver into a 2018-02-14 22:13:02 +00:00
include [MemorySSA] Fix a cache invalidation bug with removed accesses 2018-02-23 23:07:18 +00:00
lib bpf: Define instruction patterns for extensions and truncations between i32 to i64 2018-02-23 23:49:21 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [CMake] Support for cross-compilation when build runtimes 2018-01-08 23:50:59 +00:00
test [DebugInfo] Add remaining files to r325970 2018-02-23 23:13:18 +00:00
tools [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
unittests [MemorySSA] Fix a cache invalidation bug with removed accesses 2018-02-23 23:07:18 +00:00
utils Shrink various scheduling tables by using narrower types. 2018-02-23 19:32:56 +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 [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: Allow specifying arbitrary CCACHE parameters 2018-02-09 23:25:23 +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 2018-01-29 17:02:34 +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)
================================

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.