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LLVM backend for 6502
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a37862e2de
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Quentin Colombet a37862e2de [X86] Fix a bug in the lowering of the mask of VSELECT. 
X86 code to lower VSELECT messed a bit with the bits set in the mask of VSELECT
when it knows it can be lowered into BLEND. Indeed, only the high bits need to be
set for those and it optimizes those accordingly.
However, when the mask is a compile time constant, the lowering will be handled
by the generic optimizer and those modifications will generate bad code in the
generic optimizer.

This patch fixes that by preventing the optimization if the VSELECT will be
handled by the generic optimizer.

<rdar://problem/18675020>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220242 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-20 23:13:30 +00:00
autoconf Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
bindings Fix bashism in build.sh. 2014-10-17 02:20:40 +00:00
cmake Explain why we don't always use --gc-sections. 2014-10-20 21:37:38 +00:00
docs Introduce a 'nonnull' metadata on Load instructions. 2014-10-20 22:40:55 +00:00
examples Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
include Try to fix GCC error about invalid use of const_cast in const version of ErrorOr::get() 2014-10-20 20:41:21 +00:00
lib [X86] Fix a bug in the lowering of the mask of VSELECT. 2014-10-20 23:13:30 +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] Fix a bug in the lowering of the mask of VSELECT. 2014-10-20 23:13:30 +00:00
tools Add a test that would have found the bug in r219829. 2014-10-17 01:34:23 +00:00
unittests [ADT] Add a 'find_as' operation to DenseSet. 2014-10-19 19:36:33 +00:00
utils Teach Lit to catch OSError exceptions when creating a process during the 2014-10-20 20:14:28 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy Add .clang-tidy configuration file to provide LLVM-optimized defaults for 2014-09-08 13:30:00 +00:00
.gitignore Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt Add LLVM_ENABLE_MODULES flag to CMake to enable building with C++ modules. 2014-09-26 22:40:15 +00:00
CODE_OWNERS.TXT Add Tom Stellard's role as 3.5 release manager. 2014-09-12 08:07:31 +00:00
configure Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
Makefile.rules Revert my earlier change to add "all" as a dependency to check. In 2014-09-19 18:44:27 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

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.