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Add fast-path when computing the default visibility

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This commit is contained in:
Urgau 2024-10-14 16:37:54 +02:00
parent 0b16baa570
commit 67b85e2a1f
1 changed files with 7 additions and 0 deletions
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7
compiler/rustc_monomorphize/src/partitioning.rs
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@ -119,6 +119,7 @@ use rustc_middle::util::Providers;
use rustc_session::CodegenUnits; use rustc_session::CodegenUnits;
use rustc_session::config::{DumpMonoStatsFormat, SwitchWithOptPath}; use rustc_session::config::{DumpMonoStatsFormat, SwitchWithOptPath};
use rustc_span::symbol::Symbol; use rustc_span::symbol::Symbol;
use rustc_target::spec::SymbolVisibility;
use tracing::debug; use tracing::debug;
use crate::collector::{self, MonoItemCollectionStrategy, UsageMap}; use crate::collector::{self, MonoItemCollectionStrategy, UsageMap};
@ -904,6 +905,11 @@ fn mono_item_visibility<'tcx>(
} }
fn default_visibility(tcx: TyCtxt<'_>, id: DefId, is_generic: bool) -> Visibility { fn default_visibility(tcx: TyCtxt<'_>, id: DefId, is_generic: bool) -> Visibility {
// Fast-path to avoid expensive query call below
if tcx.sess.default_visibility() == SymbolVisibility::Interposable {
return Visibility::Default;
}
let export_level = if is_generic { let export_level = if is_generic {
// Generic functions never have export-level C. // Generic functions never have export-level C.
SymbolExportLevel::Rust SymbolExportLevel::Rust
@ -913,6 +919,7 @@ fn default_visibility(tcx: TyCtxt<'_>, id: DefId, is_generic: bool) -> Visibilit
_ => SymbolExportLevel::Rust, _ => SymbolExportLevel::Rust,
} }
}; };
match export_level { match export_level {
// C-export level items remain at `Default` to allow C code to // C-export level items remain at `Default` to allow C code to
// access and interpose them. // access and interpose them.