perf: Unify the undo log of all snapshot types#69464

Merged

bors merged 22 commits into

rust-lang:masterfrom

Marwes:detach_undo_log

May 6, 2020

Commits on May 5, 2020

Allow `hir().find` to return `None`

Zoxc
authored and
Markus Westerlind
committed
perf: Reduce snapshot/rollback overhead
Markus Westerlind
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Move region_constraint to the unified undo log
Markus Westerlind
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Allow SnapshotMap to have a separate undo_log
Markus Westerlind
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Move projection_cache into the combined undo log
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perf: Separate CombinedSnapshot into a FullSnapshot for probing
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perf: Lazily recive the Rollback argument in rollback_to
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perf: Limit leak check snapshotting to probe_maybe_skip_leak_check
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perf: Merge region_obligations snapshotting into the undo log
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simplify
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refactor: Rename Logs to InferCtxtUndoLogs
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refactor: Extract the undo log to its own modules
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Fix import
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Prevent modifications without an undo log
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refactor: simplify
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Rebase and use ena 0.14
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Fix review comments
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Generate the UndoLog upcasts with a macro
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Improve naming
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refactor: Move probe_fudge into fudge.rs
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refactor: Replace probe_fudge by an explict call for the lengths
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Restore the snapshot/rollback optimization for region constraints
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