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Add dead store elimination pass

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This commit is contained in:
Jakob Degen 2022-05-09 20:12:03 -04:00
parent f80e454450
commit bf153a241d
13 changed files with 496 additions and 25 deletions
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4
compiler/rustc_mir_transform/src/lib.rs
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@ -49,6 +49,7 @@ mod const_goto;
mod const_prop;
mod const_prop_lint;
mod coverage;
mod dead_store_elimination;
mod deaggregator;
mod deduplicate_blocks;
mod deref_separator;
@ -481,17 +482,18 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
&const_prop::ConstProp,
//
// Const-prop runs unconditionally, but doesn't mutate the MIR at mir-opt-level=0.
&const_debuginfo::ConstDebugInfo,
&o1(simplify_branches::SimplifyConstCondition::new("after-const-prop")),
&early_otherwise_branch::EarlyOtherwiseBranch,
&simplify_comparison_integral::SimplifyComparisonIntegral,
&simplify_try::SimplifyArmIdentity,
&simplify_try::SimplifyBranchSame,
&dead_store_elimination::DeadStoreElimination,
&dest_prop::DestinationPropagation,
&o1(simplify_branches::SimplifyConstCondition::new("final")),
&o1(remove_noop_landing_pads::RemoveNoopLandingPads),
&o1(simplify::SimplifyCfg::new("final")),
&nrvo::RenameReturnPlace,
&const_debuginfo::ConstDebugInfo,
&simplify::SimplifyLocals,
&multiple_return_terminators::MultipleReturnTerminators,
&deduplicate_blocks::DeduplicateBlocks,