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[SLP] Look-ahead operand reordering heuristic.

Authored by vporpo on Nov 11 2019, 10:50 AM.

Description

[SLP] Look-ahead operand reordering heuristic.

Summary: This patch introduces a new heuristic for guiding operand reordering. The new "look-ahead" heuristic can look beyond the immediate predecessors. This helps break ties when the immediate predecessors have identical opcodes (see lit test for examples).

Reviewers: RKSimon, ABataev, dtemirbulatov, Ayal, hfinkel, rnk

Reviewed By: RKSimon, dtemirbulatov

Subscribers: xbolva00, Carrot, hiraditya, phosek, rnk, rcorcs, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60897

Details

Committed
vporpoNov 11 2019, 9:06 PM
Reviewer
RKSimon
Differential Revision
D60897: [SLP] Look-ahead operand reordering heuristic.
Parents
rGac385ca63fe8: Fix null dereference in yaml::Document::skip
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