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[NFC] API for signaling that the current loop is being deleted

Description

[NFC] API for signaling that the current loop is being deleted

We are planning to be able to delete the current loop in LoopSimplifyCFG
in the future. Add API to notify the loop pass manager that it happened.

Details

Committed
mkazantsevFeb 19 2019, 3:14 AM
Parents
rL354313: [NFC] Store loop header in a local to keep it available after the loop is…
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