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[mlir][NFC] Fix 'gatherLoops' utility

Authored by dcaballe on Feb 19 2020, 10:06 AM.

Description

[mlir][NFC] Fix 'gatherLoops' utility

It replaces DenseMap output with a SmallVector and it
removes empty loop levels from the output.

Reviewed By: andydavis1, mehdi_amini

Differential Revision: https://reviews.llvm.org/D74658

Details

Committed
dcaballeFeb 19 2020, 10:48 AM
Reviewer
andydavis1
Differential Revision
D74658: [mlir][NFC] Fix 'gatherLoops' utility
Parents
rG0a2626d0cdc2: [DDG] Data Dependence Graph - Graph Simplification
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