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LLVM backend for 6502
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9526911809
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Adam Nemet 9526911809 [X86] Factor out new helper getPSHUFB 
I found three implementations of this.  This splits it out into a new function
and uses it from the three places.

My plan is to add a fourth use when lowering a vector_shuffle:v16i16.

Compared the assembly output of test/CodeGen/X86 before and after.

The only change is due to how the first PSHUFB was generated in
LowerVECTOR_SHUFFLEv8i16.  If the shuffle mask specified undef (i.e. -1), the
old implementation would write -1 * 2 and -1 * 2 + 1 (254 and 255) in the
control mask.  Now we write 0x80.  These are of course interchangeable since
bit 7 decides if a constant zero is written in the result byte.  The other
instances of this code use 0x80 consistently.

Related to <rdar://problem/16167303>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204734 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-25 17:47:03 +00:00
autoconf Remove projects/sample. 2014-03-12 22:40:22 +00:00
bindings [python-bindings] Remove some cruft that snuck in. 2014-02-23 04:43:26 +00:00
cmake Remove cmake module support for Visual C++ 2010 (MSVC10) 2014-03-25 09:34:20 +00:00
docs Adding some very nascent information about the clang tablegen backends, with a promise to add more information later. 2014-03-24 18:18:31 +00:00
examples Fix warnings about an variable only used in asserts. 2014-03-06 06:35:46 +00:00
include Add missing slash to make the doxygen output less confusing. 2014-03-25 17:20:28 +00:00
lib [X86] Factor out new helper getPSHUFB 2014-03-25 17:47:03 +00:00
projects Remove projects/sample. 2014-03-12 22:40:22 +00:00
test [InstCombine] Don't fold bitcast into store if it would need addrspacecast 2014-03-25 17:21:41 +00:00
tools DebugInfo: Support debug_loc under fission 2014-03-25 01:44:02 +00:00
unittests Fix these tests on windows. 2014-03-25 13:19:03 +00:00
utils remove a bunch of unused private methods 2014-03-23 17:09:26 +00:00
.arcconfig
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.gitignore Remove projects/sample. 2014-03-12 22:40:22 +00:00
CMakeLists.txt static link polly into tools 2014-03-14 04:04:14 +00:00
CODE_OWNERS.TXT Update my e-mail address in CODE_OWNERS.TXT 2014-03-13 18:04:41 +00:00
configure Remove projects/sample. 2014-03-12 22:40:22 +00:00
CREDITS.TXT
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile Provide CMake package modules in install tree 2014-02-09 16:37:02 +00:00
Makefile.common
Makefile.config.in Add a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
Makefile.rules Use -std=gnu++11 on cygwin and mingw. 2014-03-12 20:01:15 +00:00
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