Chandler Carruth a6cc351c5b [x86] Teach the new vector shuffle lowering to use 'punpcklwd' and ... 'punpckhwd' instructions when suitable rather than falling back to the generic algorithm. While we could canonicalize to these patterns late in the process, that wouldn't help when the freedom to use them is only visible during initial lowering when undef lanes are well understood. This, it turns out, is very important for matching the shuffle patterns that are used to lower sign extension. Fixes a small but relevant regression in gcc-loops with the new lowering. When I changed this I noticed that several 'pshufd' lowerings became unpck variants. This is bad because it removes the ability to freely copy in the same instruction. I've adjusted the widening test to handle undef lanes correctly and now those will correctly continue to use 'pshufd' to lower. However, this caused a bunch of churn in the test cases. No functional change, just churn. Both of these changes are part of addressing a general weakness in the new lowering -- it doesn't sufficiently leverage undef lanes. I've at least a couple of patches that will help there at least in an academic sense. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217752 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-15 09:02:37 +00:00
..
Analysis	[ARM] Teach the cost model that cross-class copies are costly.	2014-09-12 13:29:40 +00:00
Assembler	[inline asm] Add a check in InlineAsm::ConstraintInfo::Parse to make sure '{'	2014-09-05 22:30:32 +00:00
Bindings	Restore the ability to check if LLVMCreateObjectFile was successful	2014-09-05 21:22:09 +00:00
Bitcode	Teach llvm-bcanalyzer to use one stream's BLOCKINFO to read another stream.	2014-08-30 17:07:55 +00:00
BugPoint
CodeGen	[x86] Teach the new vector shuffle lowering to use 'punpcklwd' and	2014-09-15 09:02:37 +00:00
DebugInfo	DebugInfo: Do not use DW_FORM_GNU_addr_index in skeleton CUs, GDB 7.8 errors on this.	2014-09-07 17:31:42 +00:00
ExecutionEngine	[MCJIT] Make sure we test ARM BR24 relocations with both internal and external	2014-09-11 22:43:36 +00:00
Feature	[AArch64] Update test case to pass with post-RA MI scheduler.	2014-09-13 03:23:23 +00:00
FileCheck
Instrumentation	[asan-assembly-instrumentation] Added CFI directives to the generated instrumentation code.	2014-09-10 09:45:49 +00:00
Integer
JitListener
Linker	Merge alignment of common GlobalValue.	2014-09-09 17:48:18 +00:00
LTO
MC	[mips][microMIPS] Implement JRADDIUSP instruction	2014-09-12 14:29:54 +00:00
Object	Nuke MCAnalysis.	2014-09-02 22:32:20 +00:00
Other	[lit] Parse all strings as UTF-8 rather than ASCII.	2014-09-12 16:46:05 +00:00
TableGen	Tablegen fixes for new syntax when initializing bits from variables.	2014-08-29 19:41:04 +00:00
tools	Stop suppress error messages in test case to see why one buildbot is failing	2014-09-12 22:46:01 +00:00
Transforms	InstSimplify: Simplify trivial and/or of icmps	2014-09-15 08:15:28 +00:00
Unit
Verifier	Verifier: Don't reject varargs callee cleanup functions	2014-08-29 21:25:28 +00:00
YAMLParser
.clang-format
CMakeLists.txt	Add LLVMgold target to test dependencies.	2014-09-10 22:20:49 +00:00
lit.cfg	Reinstate "Nuke the old JIT."	2014-09-02 22:28:02 +00:00
lit.site.cfg.in	Add missing Interpreter intrinsic lowering for sin, cos and ceil	2014-08-08 15:00:12 +00:00
Makefile	Delete support for AuroraUX.	2014-08-14 15:15:09 +00:00
Makefile.tests
TestRunner.sh