llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-01 10:57:21 +00:00

LLVM backend for 6502

Go to file

Chandler Carruth 33957173a7 [x86] Teach the vector combiner that picks a canonical shuffle from to support transforming the forms from the new vector shuffle lowering to use 'movddup' when appropriate. A bunch of the cases where we actually form 'movddup' don't actually show up in the test results because something even later than DAG legalization maps them back to 'unpcklpd'. If this shows back up as a performance problem, I'll probably chase it down, but it is at least an encoded size loss. =/ To make this work, also always do this canonicalizing step for floating point vectors where the baseline shuffle instructions don't provide any free copies of their inputs. This also causes us to canonicalize unpck[hl]pd into mov{hl,lh}ps (resp.) which is a nice encoding space win. There is one test which is "regressed" by this: extractelement-load. There, the test case where the optimization it is testing fails, the exact instruction pattern which results is slightly different. This should probably be fixed by having the appropriate extract formed earlier in the DAG, but that would defeat the purpose of the test.... If this test case is critically important for anyone, please let me know and I'll try to work on it. The prior behavior was actually contrary to the comment in the test case and seems likely to have been an accident. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217738 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-14 22:41:37 +00:00
autoconf	Delete support for AuroraUX.	2014-08-14 15:15:09 +00:00
bindings	Reinstate "Nuke the old JIT."	2014-09-02 22:28:02 +00:00
cmake	Add CMake check for libatomic.	2014-09-12 11:08:59 +00:00
docs	[docs] Mention character array constants in docs/LangRef.rst	2014-09-11 12:02:59 +00:00
examples	Add doInitialization/doFinalization to DataLayoutPass.	2014-09-10 21:27:43 +00:00
include	Add control of function merging to the PMBuilder.	2014-09-13 21:46:00 +00:00
lib	[x86] Teach the vector combiner that picks a canonical shuffle from to	2014-09-14 22:41:37 +00:00
projects	[cmake] Use the external project machinery for libcxxabi so that it can	2014-07-25 10:27:40 +00:00
test	[x86] Teach the vector combiner that picks a canonical shuffle from to	2014-09-14 22:41:37 +00:00
tools	[llvm-objdump] Use PRIX64 with format()	2014-09-13 00:18:40 +00:00
unittests	Support: Use llvm::COFF::BigObjMagic	2014-09-11 22:34:32 +00:00
utils	[lit] Parse all strings as UTF-8 rather than ASCII.	2014-09-12 16:46:05 +00:00
.arcconfig
.clang-format
.clang-tidy	Add .clang-tidy configuration file to provide LLVM-optimized defaults for	2014-09-08 13:30:00 +00:00
.gitignore
CMakeLists.txt	Enabling LLVM & Clang to be cross-compiled using CMake from a single configuration command line	2014-09-03 23:21:18 +00:00
CODE_OWNERS.TXT	Add Tom Stellard's role as 3.5 release manager.	2014-09-12 08:07:31 +00:00
configure	Delete support for AuroraUX.	2014-08-14 15:15:09 +00:00
CREDITS.TXT	Rise from the dead and update personal info	2014-08-25 17:51:04 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in	Track clang r213171	2014-07-16 16:50:34 +00:00
Makefile.rules	Reinstate "Nuke the old JIT."	2014-09-02 22:28:02 +00:00
README.txt

README.txt

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level
Virtual Machine, 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're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.