Commit Graph

10 Commits

Author SHA1 Message Date
Simon Pilgrim 3e5fb61978 [X86][AVX2] Broadcast subvectors
AVX2 can only broadcast from the zero'th element of a vector, but if the broadcastable element is the zero'th element of a 128-bit subvector its advantageous to extract the subvector, broadcast from that and avoid the loading of shuffle mask data that would be needed for VPERMPS/VPERMD. The only exception being when the source type is 4f64 or 4i64 which can directly use the immediate shuffle VPERMPD/VPERMQ directly.

Differential Revision: http://reviews.llvm.org/D16050

llvm-svn: 258081
2016-01-18 20:59:04 +00:00
James Y Knight 7c905063c5 Make utils/update_llc_test_checks.py note that the assertions are
autogenerated.

Also update existing test cases which appear to be generated by it and
weren't modified (other than addition of the header) by rerunning it.

llvm-svn: 253917
2015-11-23 21:33:58 +00:00
Simon Pilgrim df993479c9 [X86][AVX512] Fixed shuffle test name to match shuffle
llvm-svn: 251984
2015-11-03 21:39:30 +00:00
Simon Pilgrim 94c4943562 [X86][AVX512] Test UNPCK with non-sequential scalars
Missing tests for r251297

llvm-svn: 251453
2015-10-27 21:18:45 +00:00
Igor Breger 684af8156c AVX-512: Use correct extract vector length.
Bug https://llvm.org/bugs/show_bug.cgi?id=25318

Differential Revision: http://reviews.llvm.org/D14062

llvm-svn: 251285
2015-10-26 12:26:34 +00:00
Elena Demikhovsky e88038f235 AVX-512: Lowering for 512-bit vector shuffles.
Vector types: <8 x 64>, <16 x 32>, <32 x 16> float and integer.

Differential Revision: http://reviews.llvm.org/D10683

llvm-svn: 246981
2015-09-08 06:38:21 +00:00
Chandler Carruth eb206aa1ea [x86] Now that the new vector shuffle legality is enabled and everything
is going well, remove the flag and the code for the old legality tests.

This is the first step toward removing the entire old vector shuffle
lowering. *Much* more code to delete coming up next.

llvm-svn: 229963
2015-02-20 03:59:35 +00:00
Chandler Carruth fe69608839 [x86] Switch a collection of tests explicitly to the new vector shuffle
legality test (essentially, everything is legal).

I'm planning to make this the default shortly, but I'd like to fix
a collection of the bugs it exposes first, and this will let me easily
test them. It also showcases both the improvements and a few of the
regressions triggered by the change. The biggest improvements by far are
the significantly reduced shuffling and domain crossing in the combining
test case. The biggest regressions are missing some clever blending
patterns.

llvm-svn: 229284
2015-02-15 06:37:21 +00:00
Chandler Carruth 89a60770e0 [x86] Remove the now-default-on flag for the new vector shuffle lowering
strategy from a bunch of tests.

llvm-svn: 229283
2015-02-15 06:20:51 +00:00
Adam Nemet d23c88db15 [AVX512] Add 16x32 unpck tests as well
Forgot this from r225838.

llvm-svn: 225850
2015-01-13 23:27:55 +00:00