[PATCH] D41794: [X86] Improve AVX1 shuffle lowering for v8f32 shuffles where the low half comes from V1 and the high half comes from V2 and the halves do the same operation

[Konstantin Belochapka via Phabricator via llvm-commits]

kbelochapka added a comment.

Hi Craig, I placed simple test on the Bugzilla, your fix seems to be working fine.
The only thing, there are couple or more of shuffle masks which looks like they can be a subject of the similar optimization, but the generated code for them remained not optimized. 
// IN0:  |0|1| | |4|5| | |
// IN1:  |8|9| | | | |E|F|
MASK011:	0,1,4,5,8,9,14,15	
// IN0:  |0|1| | | | |6|7|
// IN1:  |8|9| | |C|D| | |
MASK012:	0,1,6,7,8,9,12,13


https://reviews.llvm.org/D41794