llvm-project

Author	SHA1	Message	Date
Gadi Haber	19c4fc5e62	This is a large patch for X86 AVX-512 of an optimization for reducing code size by encoding EVEX AVX-512 instructions using the shorter VEX encoding when possible. There are cases of AVX-512 instructions that have two possible encodings. This is the case with instructions that use vector registers with low indexes of 0 - 15 and do not use the zmm registers or the mask k registers. The EVEX encoding prefix requires 4 bytes whereas the VEX prefix can take only up to 3 bytes. Consequently, using the VEX encoding for these instructions results in a code size reduction of ~2 bytes even though it is compiled with the AVX-512 features enabled. Reviewers: Craig Topper, Zvi Rackoover, Elena Demikhovsky Differential Revision: https://reviews.llvm.org/D27901 llvm-svn: 290663	2016-12-28 10:12:48 +00:00
Craig Topper	715ad7fef5	[AVX-512] Add support for turning a 256-bit load that goes to both halfs of an insert_subvector into a subvector broadcast. Differential Revision: https://reviews.llvm.org/D25650 llvm-svn: 284353	2016-10-16 23:29:51 +00:00
Craig Topper	4c53e60360	[AVX512] Add VLX packed move instructions to the execution dependency fix pass and update tests. llvm-svn: 277304	2016-07-31 20:20:01 +00:00
Simon Pilgrim	5366d0e0bc	[X86][AVX512] Added AVX512 subvector broadcast tests llvm-svn: 275994	2016-07-19 17:04:28 +00:00