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[mlir] Add a DCE pass for dead symbols.

Authored by rriddle on Jan 27 2020, 11:24 PM.

Description

[mlir] Add a DCE pass for dead symbols.

Summary: This pass deletes all symbols that are found to be unreachable. This is done by computing the set of operations that are known to be live, propagating that liveness to other symbols, and then deleting all symbols that are not within this live set.

Differential Revision: https://reviews.llvm.org/D72482

Details

Committed
rriddleJan 27 2020, 11:29 PM
Differential Revision
D72482: [mlir] Add a DCE pass for dead symbols.
Parents
rGab9e5598cdc7: [mlir] Refactor the implementation of Symbol use lists.
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