llvm-project

Commit Graph

Author	SHA1	Message	Date
Simon Pilgrim	d02c55204b	[VectorLegalizer] Expansion of CTLZ using CTPOP when possible This patch avoids scalarization of CTLZ by instead expanding to use CTPOP (ref: "Hacker's Delight") when the necessary operations are available. This also adds the necessary cost models for X86 SSE2 targets (the main beneficiary) to ensure vectorization only happens when its useful. Differential Revision: https://reviews.llvm.org/D25910 llvm-svn: 286233	2016-11-08 14:10:28 +00:00
Simon Pilgrim	5d5ca9c0cb	[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716	2016-08-04 10:51:41 +00:00
Simon Pilgrim	a2220ea456	[SLPVectorizer][X86] Added CTPOP/CTLZ/CTTZ vectorization tests llvm-svn: 268800	2016-05-06 21:33:01 +00:00

Author

SHA1

Message

Date

Simon Pilgrim

d02c55204b

[VectorLegalizer] Expansion of CTLZ using CTPOP when possible

This patch avoids scalarization of CTLZ by instead expanding to use CTPOP (ref: "Hacker's Delight") when the necessary operations are available.

This also adds the necessary cost models for X86 SSE2 targets (the main beneficiary) to ensure vectorization only happens when its useful.

Differential Revision: https://reviews.llvm.org/D25910

llvm-svn: 286233

2016-11-08 14:10:28 +00:00

Simon Pilgrim

5d5ca9c0cb

[X86][SSE] Add initial costs for vector CTTZ/CTLZ

llvm-svn: 277716

2016-08-04 10:51:41 +00:00

Simon Pilgrim

a2220ea456

[SLPVectorizer][X86] Added CTPOP/CTLZ/CTTZ vectorization tests

llvm-svn: 268800

2016-05-06 21:33:01 +00:00

3 Commits