llvm-project

Commit Graph

Author	SHA1	Message	Date
Craig Topper	d3bb036bc9	[X86] Add some cost model entries for sext/zext for avx512bw This fixes some of scalarization costs reported for sext/zext using avx512bw. This does not fix all scalarization costs being reported. Just the worst. I've restricted this only to combinations of types that are legal with avx512bw like v32i1/v64i1/v32i16/v64i8 and conversions between vXi1 and vXi8/vXi16 with legal vXi8/vXi16 result types. Differential Revision: https://reviews.llvm.org/D54979 llvm-svn: 347785	2018-11-28 18:11:39 +00:00
Craig Topper	5e7dcc65bd	[X86] Add exhaustive cost model testing for sext/zext for all vector types we reasonably support. Add cost model tests for truncating to vXi1. Our sext/zext cost modeling was somewhat incomplete. And had no coverage for the fact that avx512bw v32i16/v64i8 types return a scalarization cost. Truncates are a whole different mess because isTruncateFree is returning true for vectors when it shouldn't and that's the fall back for anything not in the tables. llvm-svn: 347719	2018-11-27 22:46:05 +00:00

Author

SHA1

Message

Date

Craig Topper

d3bb036bc9

[X86] Add some cost model entries for sext/zext for avx512bw

This fixes some of scalarization costs reported for sext/zext using avx512bw. This does not fix all scalarization costs being reported. Just the worst.

I've restricted this only to combinations of types that are legal with avx512bw like v32i1/v64i1/v32i16/v64i8 and conversions between vXi1 and vXi8/vXi16 with legal vXi8/vXi16 result types.

Differential Revision: https://reviews.llvm.org/D54979

llvm-svn: 347785

2018-11-28 18:11:39 +00:00

Craig Topper

5e7dcc65bd

[X86] Add exhaustive cost model testing for sext/zext for all vector types we reasonably support. Add cost model tests for truncating to vXi1.

Our sext/zext cost modeling was somewhat incomplete. And had no coverage for the fact that avx512bw v32i16/v64i8 types return a scalarization cost.

Truncates are a whole different mess because isTruncateFree is returning true for vectors when it shouldn't and that's the fall back for anything not in the tables.

llvm-svn: 347719

2018-11-27 22:46:05 +00:00

2 Commits