Commit Graph

21 Commits

Author SHA1 Message Date
Craig Topper 715873ead3 [AVX-512] Remove masked packss/packus intrinsics and autoupgrade to unmasked intrinsics with select instructions. For 512-bit add new unmasked intrinsics.
The new 512-bit unmasked intrinsics will make it easy to handle these with the SSE/AVX intrinsics in InstCombine where we currently have a TODO.

llvm-svn: 295290
2017-02-16 06:31:54 +00:00
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 b110e04851 [AVX-512] Remove masked pmovzx/pmovsx builtins and autoupgrade them to selects and native zext/sext.
This mostly reuses earlier autoupgrade support for the sse and avx equivalents. Just needed to add the code to add the select.

llvm-svn: 286092
2016-11-07 02:12:57 +00:00
Craig Topper 7e545335d6 [AVX-512] Remove 128/256 masked pshufb intrinsics. Autoupgrade them to legacy intrinsics and a select.
llvm-svn: 286089
2016-11-07 00:13:39 +00:00
Craig Topper af9b3fe752 [AVX-512] Remove intrinsics for 128/256-bit masked shift by immediate. Instead upgrade them to a select and the older SSE/AVX2 intrinsic.
llvm-svn: 286072
2016-11-06 16:29:14 +00:00
Craig Topper c9467ed31e [AVX-512] Remove intrinsics for 128/256-bit masked shift by single element in xmm. Instead upgrade them to a select and the older SSE/AVX2 intrinsic.
llvm-svn: 286070
2016-11-06 16:29:08 +00:00
Craig Topper 8ec5c7326d [AVX-512] Remove masked pmin/pmax intrinsics and autoupgrade to native IR.
Clang patch to replace 512-bit vector and 64-bit element versions with native IR will follow.

llvm-svn: 284955
2016-10-24 04:04:16 +00:00
Craig Topper af0d63d2e7 [AVX-512] Remove masked integer add/sub/mull intrinsics and upgrade to native IR.
llvm-svn: 280611
2016-09-04 02:09:53 +00:00
Elena Demikhovsky dca03bebd3 AVX-512: Changed lowering of BITCAST between i1 vectors and i8/i16/i32 integer values
Optimized lowering of BITCAST node. The BITCAST node can be replaced with COPY_TO_REG instead of KMOV.
It allows to suppress two opposite BITCAST operations and avoid redundant "movs".

Differential Revision: https://reviews.llvm.org/D23247

llvm-svn: 277958
2016-08-07 13:05:58 +00:00
Matthias Braun 152e7c8b12 VirtRegMap: Replace some identity copies with KILL instructions.
An identity COPY like this:
   %AL = COPY %AL, %EAX<imp-def>
has no semantic effect, but encodes liveness information: Further users
of %EAX only depend on this instruction even though it does not define
the full register.

Replace the COPY with a KILL instruction in those cases to maintain this
liveness information. (This reverts a small part of r238588 but this
time adds a comment explaining why a KILL instruction is useful).

llvm-svn: 274952
2016-07-09 00:19:07 +00:00
Simon Pilgrim 4e96fbf3c1 [X86][AVX512] Autoupgrade the BROADCAST intrinsics
llvm-svn: 274550
2016-07-05 13:58:47 +00:00
Simon Pilgrim dbd6db0dc7 [X86][AVX512] Add support for VPALIGNR/PSHUFD/PSHUFHW/PSHUFLW masked shuffle comments
llvm-svn: 274466
2016-07-03 15:00:51 +00:00
Simon Pilgrim 598bdb6bfe [X86][AVX512] Add support for UNPCK masked shuffle comments
llvm-svn: 274464
2016-07-03 14:26:21 +00:00
Craig Topper 597aa42fec [AVX512] Remove masked unpack intrinsics and autoupgrade to vectorshuffle and selects.
llvm-svn: 273543
2016-06-23 07:37:33 +00:00
Craig Topper 0a0fb0fda1 [AVX512] Remove the masked vpcmpeq/vcmpgt intrinsics and autoupgrade them to native icmps.
llvm-svn: 273240
2016-06-21 03:53:24 +00:00
Craig Topper 13cf7cac07 [AVX512] Remove maksed pshufd, pshuflw, and phufhw intrinsics and autoupgrade them to selects and shufflevector.
llvm-svn: 272527
2016-06-13 02:36:48 +00:00
Craig Topper 89c1761474 [AVX512] Fix shuffle comment printing to handle the masked versions of some shuffles. Previously we were printing the mask operands as the register names.
llvm-svn: 272367
2016-06-10 04:48:05 +00:00
Craig Topper 8537c11ff3 [X86] Fix a test I failed to re-generate in r272249.
llvm-svn: 272250
2016-06-09 07:10:34 +00:00
Craig Topper 33350cc406 [AVX512] Remove masked palignr intrinsics and auto-upgrade them to native IR of vector shuffle and select.
llvm-svn: 271872
2016-06-06 06:12:54 +00:00
Craig Topper f10fbfa738 [AVX512] Remove masked load intrinsics. Clang now emits generic masked load intrinsics instead.
The intrinsics will be autoupgraded to the same generic masked loads.

llvm-svn: 271478
2016-06-02 04:19:36 +00:00
Craig Topper 50f85c22c5 [AVX512] Remove masked store intrinsics. Clang now emits generic masked store intrinsics instead.
The intrinsics will be autoupgraded to the same generic masked stores.

llvm-svn: 271245
2016-05-31 01:50:02 +00:00