Chandler Carruth 04402a6c13 [x86] Undo a flawed transform I added to form UNPCK instructions when ... AVX is available, and generally tidy up things surrounding UNPCK formation. Originally, I was thinking that the only advantage of PSHUFD over UNPCK instruction variants was its free copy, and otherwise we should use the shorter encoding UNPCK instructions. This isn't right though, there is a larger advantage of being able to fold a load into the operand of a PSHUFD. For UNPCK, the operand *must* be in a register so it can be the second input. This removes the UNPCK formation in the target-specific DAG combine for v4i32 shuffles. It also lifts the v8 and v16 cases out of the AVX-specific check as they are potentially replacing multiple instructions with a single instruction and so should always be valuable. The floating point checks are simplified accordingly. This also adjusts the formation of PSHUFD instructions to attempt to match the shuffle mask to one which would fit an UNPCK instruction variant. This was originally motivated to allow it to match the UNPCK instructions in the combiner, but clearly won't now. Eventually, we should add a MachineCombiner pass that can form UNPCK instructions post-RA when the operand is known to be in a register and thus there is no loss. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217755 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-15 10:35:41 +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] Undo a flawed transform I added to form UNPCK instructions when	2014-09-15 10:35:41 +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	FileCheck: Add a flag to allow checking empty input	2014-08-07 18:40:37 +00:00
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	[Support][YAML] Add support for accessing tags and tag handle substitution.	2013-10-18 22:38:04 +00:00
.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