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archived-llvm-mirror/lib/Transforms/Vectorize
Vasileios Porpodas e68d49ecd7 [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 an example).

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

Reviewed By: RKSimon, dtemirbulatov

Subscribers: rnk, rcorcs, llvm-commits

Tags: #llvm

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

llvm-svn: 364478
2019-06-26 21:25:24 +00:00
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