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Disable non-required MIR opts with optimize(none)

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Co-authored-by: Waffle Lapkin <waffle.lapkin@gmail.com>
This commit is contained in:
clubby789 2024-12-09 19:34:51 +00:00
parent cd848c9f3e
commit 7a9661d768
57 changed files with 319 additions and 10 deletions
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33
compiler/rustc_mir_transform/src/lib.rs
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@ -388,6 +388,7 @@ fn mir_built(tcx: TyCtxt<'_>, def: LocalDefId) -> &Steal<Body<'_>> {
&Lint(sanity_check::SanityCheck),
],
None,
pm::Optimizations::Allowed,
);
tcx.alloc_steal_mir(body)
}
@ -440,6 +441,7 @@ fn mir_promoted(
&mut body,
&[&promote_pass, &simplify::SimplifyCfg::PromoteConsts, &coverage::InstrumentCoverage],
Some(MirPhase::Analysis(AnalysisPhase::Initial)),
pm::Optimizations::Allowed,
);
lint_tail_expr_drop_order::run_lint(tcx, def, &body);
@ -473,7 +475,7 @@ fn inner_mir_for_ctfe(tcx: TyCtxt<'_>, def: LocalDefId) -> Body<'_> {
};
let mut body = remap_mir_for_const_eval_select(tcx, body, hir::Constness::Const);
pm::run_passes(tcx, &mut body, &[&ctfe_limit::CtfeLimit], None);
pm::run_passes(tcx, &mut body, &[&ctfe_limit::CtfeLimit], None, pm::Optimizations::Allowed);
body
}
@ -493,7 +495,7 @@ fn mir_drops_elaborated_and_const_checked(tcx: TyCtxt<'_>, def: LocalDefId) -> &
let is_fn_like = tcx.def_kind(def).is_fn_like();
if is_fn_like {
// Do not compute the mir call graph without said call graph actually being used.
if pm::should_run_pass(tcx, &inline::Inline)
if pm::should_run_pass(tcx, &inline::Inline, pm::Optimizations::Allowed)
|| inline::ForceInline::should_run_pass_for_callee(tcx, def.to_def_id())
{
tcx.ensure_with_value().mir_inliner_callees(ty::InstanceKind::Item(def.to_def_id()));
@ -533,6 +535,7 @@ pub fn run_analysis_to_runtime_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'
&Lint(post_drop_elaboration::CheckLiveDrops),
],
None,
pm::Optimizations::Allowed,
);
}
@ -557,7 +560,13 @@ fn run_analysis_cleanup_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
&deref_separator::Derefer,
];
pm::run_passes(tcx, body, passes, Some(MirPhase::Analysis(AnalysisPhase::PostCleanup)));
pm::run_passes(
tcx,
body,
passes,
Some(MirPhase::Analysis(AnalysisPhase::PostCleanup)),
pm::Optimizations::Allowed,
);
}
/// Returns the sequence of passes that lowers analysis to runtime MIR.
@ -597,7 +606,13 @@ fn run_runtime_cleanup_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
&simplify::SimplifyCfg::PreOptimizations,
];
pm::run_passes(tcx, body, passes, Some(MirPhase::Runtime(RuntimePhase::PostCleanup)));
pm::run_passes(
tcx,
body,
passes,
Some(MirPhase::Runtime(RuntimePhase::PostCleanup)),
pm::Optimizations::Allowed,
);
// Clear this by anticipation. Optimizations and runtime MIR have no reason to look
// into this information, which is meant for borrowck diagnostics.
@ -611,6 +626,15 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
WithMinOptLevel(1, x)
}
let def_id = body.source.def_id();
let optimizations = if tcx.def_kind(def_id).has_codegen_attrs()
&& tcx.codegen_fn_attrs(def_id).optimize.do_not_optimize()
{
pm::Optimizations::Suppressed
} else {
pm::Optimizations::Allowed
};
// The main optimizations that we do on MIR.
pm::run_passes(
tcx,
@ -683,6 +707,7 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
&dump_mir::Marker("PreCodegen"),
],
Some(MirPhase::Runtime(RuntimePhase::Optimized)),
optimizations,
);
}