Elena Demikhovsky c2b6a16ee9 AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. ...

X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost.

In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426).

* Shiffle-broadcast cost will be changed in Simon's upcoming patch.

Differential Revision: https://reviews.llvm.org/D28118



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290810 91177308-0d34-0410-b5e6-96231b3b80d8

2017-01-02 10:37:52 +00:00

..

llvm

AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns.

2017-01-02 10:37:52 +00:00

llvm-c

[GVN] Initial check-in of a new global value numbering algorithm.

2016-12-22 16:03:48 +00:00