Skip to content
Commit eab2d466 authored by Craig Topper's avatar Craig Topper
Browse files

[SelectionDAG][X86] Improve legalization of v32i1 CONCAT_VECTORS of v16i1 for AVX512F. 

A v32i1 CONCAT_VECTORS of v16i1 uses promotion to v32i8 to legalize the v32i1. This results in a bunch of extract_vector_elts and a build_vector that ultimately gets scalarized.

This patch checks to see if v16i8 is legal and inserts a any_extend to that so that we can concat v16i8 to v32i8 and avoid creating the extracts.

llvm-svn: 320674
parent 271a5c72
Expand all Hide whitespace changes
Inline Side-by-side
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment