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[perf] Measure Destination Propagation performance #72635

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[perf] Measure Destination Propagation performance #72635

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19cd910
Implement a destination propagation pass
jonas-schievink May 24, 2020
2080a93
simplify_try: print dest_prop diff and bless
jonas-schievink May 25, 2020
0d017cc
simplify_try: clean up test
jonas-schievink May 25, 2020
4239d74
Make nrvo-simple set mir-opt-level=1
jonas-schievink May 25, 2020
8f77e36
Bless mir-opt tests
jonas-schievink May 25, 2020
fbcf758
Add a few dest-prop MIR tests
jonas-schievink May 24, 2020
fef2597
perf: walk liveness backwards in Conflicts::build
jonas-schievink May 25, 2020
093b248
perf: only calculate conflicts for candidates
jonas-schievink May 26, 2020
8575026
perf: bail out when there's >500 candidate locals
jonas-schievink May 26, 2020
d6fe24c
Record intra-statement/terminator conflicts
jonas-schievink Jun 4, 2020
b7c44d3
More logging
jonas-schievink Jun 22, 2020
97d49ef
Properly inherit conflicts when merging locals
jonas-schievink Jun 24, 2020
731dbe3
Fix rebase fallout
jonas-schievink Jun 24, 2020
b760023
Limit block count
jonas-schievink Jun 24, 2020
d36b287
[perf] run destination propagation by default
jonas-schievink May 26, 2020
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Implement a destination propagation pass
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@jonas-schievink
jonas-schievink committed Jun 24, 2020
commit 19cd9103d85f51fc84f262b979f2877525d6a124
2 changes: 1 addition & 1 deletion src/librustc_mir/dataflow/impls/mod.rs
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Expand Up @@ -192,7 +192,7 @@ impl<'a, 'tcx> HasMoveData<'tcx> for DefinitelyInitializedPlaces<'a, 'tcx> {

/// `EverInitializedPlaces` tracks all places that might have ever been
/// initialized upon reaching a particular point in the control flow
/// for a function, without an intervening `Storage Dead`.
/// for a function, without an intervening `StorageDead`.
///
/// This dataflow is used to determine if an immutable local variable may
/// be assigned to.
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1 change: 1 addition & 0 deletions src/librustc_mir/lib.rs
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Expand Up @@ -6,6 +6,7 @@ Rust MIR: a lowered representation of Rust.

#![feature(nll)]
#![feature(in_band_lifetimes)]
#![feature(bindings_after_at)]
#![feature(bool_to_option)]
#![feature(box_patterns)]
#![feature(box_syntax)]
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