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Author SHA1 Message Date
Simon Pilgrim 253ca348b2 [X86][AVX512] Fixed VPERMT2* shuffle mask decoding and enabled target shuffle combining. 
Patch to add support for target shuffle combining of X86ISD::VPERMV3 nodes, including support for detecting unary shuffles.

This uncovered several issues with the X86ISD::VPERMV3 shuffle mask decoding of non-64 bit shuffle mask elements - the bit masking wasn't being correctly computed.

Removed non-constant pool mask decode path as we have no way of testing it right now.

Differential Revision: http://reviews.llvm.org/D17916

llvm-svn: 262809
 2016-03-06 21:54:52 +00:00
Simon Pilgrim 3c7e94208a [X86][AVX512] Added some basic X86ISD::VPERMV3 shuffle combining tests 
None of these actually combine yet as we haven't enabled X86ISD::VPERMV3 for target shuffle combining

llvm-svn: 262718
 2016-03-04 15:19:42 +00:00
Simon Pilgrim f33cb61471 [X86][AVX512BW] Fixed 512-bit PSHUFB shuffle mask decode and added combine test. 
PSHUFB decoder was assuming that input was 128 or 256-bit vector only.

llvm-svn: 262661
 2016-03-03 21:55:01 +00:00