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Use unused_generic_params
from crate metadata
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f1b1ed7e18
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@ -226,7 +226,15 @@ provide! { tcx, def_id, other, cdata,
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lookup_default_body_stability => { table }
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lookup_deprecation_entry => { table }
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params_in_repr => { table }
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unused_generic_params => { table }
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// FIXME: Could be defaulted, but `LazyValue<UnusedGenericParams>` is not `FixedSizeEncoding`..
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unused_generic_params => {
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cdata
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.root
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.tables
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.unused_generic_params
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.get(cdata, def_id.index)
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.map_or_else(|| ty::UnusedGenericParams::new_all_used(), |lazy| lazy.decode((cdata, tcx)))
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}
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opt_def_kind => { table_direct }
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impl_parent => { table }
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impl_polarity => { table_direct }
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@ -63,7 +63,7 @@ impl<'tcx> Key for ty::InstanceDef<'tcx> {
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#[inline(always)]
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fn query_crate_is_local(&self) -> bool {
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true
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self.def_id().is_local()
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}
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fn default_span(&self, tcx: TyCtxt<'_>) -> Span {
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@ -76,7 +76,7 @@ impl<'tcx> Key for ty::Instance<'tcx> {
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#[inline(always)]
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fn query_crate_is_local(&self) -> bool {
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true
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self.def_id().is_local()
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}
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fn default_span(&self, tcx: TyCtxt<'_>) -> Span {
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@ -36,6 +36,8 @@ fn unused_generic_params<'tcx>(
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tcx: TyCtxt<'tcx>,
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instance: ty::InstanceDef<'tcx>,
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) -> UnusedGenericParams {
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assert!(instance.def_id().is_local());
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if !tcx.sess.opts.unstable_opts.polymorphize {
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// If polymorphization disabled, then all parameters are used.
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return UnusedGenericParams::new_all_used();
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@ -100,13 +102,6 @@ fn should_polymorphize<'tcx>(
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return false;
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}
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// Polymorphization results are stored in cross-crate metadata only when there are unused
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// parameters, so assume that non-local items must have only used parameters (else this query
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// would not be invoked, and the cross-crate metadata used instead).
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if !def_id.is_local() {
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return false;
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}
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// Foreign items have no bodies to analyze.
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if tcx.is_foreign_item(def_id) {
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return false;
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@ -0,0 +1,4 @@
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// compile-flags: -Zpolymorphize=on
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#[inline(never)]
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pub fn foo<T>() {}
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11
tests/codegen-units/polymorphization/poly-foreign.rs
Normal file
11
tests/codegen-units/polymorphization/poly-foreign.rs
Normal file
@ -0,0 +1,11 @@
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// aux-build:poly-dep.rs
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// compile-flags: --crate-type=lib -Zprint-mono-items=eager -Zpolymorphize=on
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extern crate poly_dep;
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pub static FN1: fn() = poly_dep::foo::<i32>;
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pub static FN2: fn() = poly_dep::foo::<u32>;
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//~ MONO_ITEM static FN1
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//~ MONO_ITEM static FN2
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//~ MONO_ITEM fn poly_dep::foo::<T>
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