mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 19:20:13 +01:00
Chandler Carruth
d010d52f37
As part of this, move functions that seem reasonable to make out-of-line to a separate `_impl.h` header file that is only included where the explicit instantiation _definition_ is provided. By using explicit instantiation we can make these templates behave more like non-template classes in terms of supporting out-of-line definitions that don't need to be compiled by every translation unit. The set of eventual instantiations here is fundamentally known, and there tend to be headers that define a canonical "leaf" type where it makes sense to trigger the explicit instantiation. Where we already had a `.cpp` file to put the explicit instantiation definition, use it. But in some places we didn't have such a `.cpp` file so this PR adds those. This also requires that we have precise constraints on APIs that _can't_ be instantiated for specific argument types, as now we don't do this lazily. Combined, this appears to reduce the sum of object file sizes in the `check` directory by almost 40% (122mb -> 74mb) in my measurement. My actual goal was to improve compile times, but so far I don't have a great methodology for measuring these... But the object file size reduction seems to confirm this is a net win and likely represents a non-trivial improvement in compile time. Assisted-by: Antigravity with Gemini
82 lines
3.0 KiB
C++
82 lines
3.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_TOOLCHAIN_SEM_IR_INTERFACE_H_
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#define CARBON_TOOLCHAIN_SEM_IR_INTERFACE_H_
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#include "toolchain/base/value_store.h"
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#include "toolchain/sem_ir/core_interface.h"
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#include "toolchain/sem_ir/entity_with_params_base.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::SemIR {
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// Interface-specific fields.
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//
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// TODO: Factor out the shared fields between InterfaceFields and
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// NamedConstraintFields.
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struct InterfaceFields {
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// The following members are set at the `{` of the interface definition.
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// The interface scopes.
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NameScopeId scope_without_self_id = NameScopeId::None;
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NameScopeId scope_with_self_id = NameScopeId::None;
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// The block of instructions outside the interface-with-self. This is where
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// the `Self` instruction can be constructed.
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InstBlockId body_block_without_self_id = InstBlockId::None;
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// The interface-with-self generic, where the `Self` is a parameter to the
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// generic. This generic contains all the associated entities of the
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// interface.
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GenericId generic_with_self_id = GenericId::None;
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// The first block of the interface-with-self body.
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// TODO: Handle control flow in the interface body, such as if-expressions.
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InstBlockId body_block_with_self_id = InstBlockId::None;
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// The implicit `Self` parameter. This is a SymbolicBinding instruction.
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InstId self_param_id = InstId::None;
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// Identifies whether the interface is a core interface.
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CoreInterface core_interface = CoreInterface::Unknown;
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// The following members are set at the `}` of the interface definition.
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RequireImplsBlockId require_impls_block_id = RequireImplsBlockId::None;
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InstBlockId associated_entities_id = InstBlockId::None;
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};
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// An interface. See EntityWithParamsBase regarding the inheritance here.
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struct Interface : public EntityWithParamsBase,
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public InterfaceFields,
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public Printable<Interface> {
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auto Print(llvm::raw_ostream& out) const -> void {
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out << "{";
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PrintBaseFields(out);
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out << ", require_impls_block_id: " << require_impls_block_id;
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if (core_interface != CoreInterface::Unknown) {
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out << ", core_interface: " << core_interface;
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}
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out << "}";
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}
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// This is false until we reach the `}` of the interface definition.
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auto is_complete() const -> bool {
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return associated_entities_id.has_value();
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}
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// Determines whether we're currently defining the interface. This is true
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// between the braces of the interface.
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auto is_being_defined() const -> bool {
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return has_definition_started() && !is_complete();
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}
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};
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using InterfaceStore = ValueStore<InterfaceId, Interface, Tag<CheckIRId>>;
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} // namespace Carbon::SemIR
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namespace Carbon {
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extern template class ValueStore<SemIR::InterfaceId, SemIR::Interface,
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Tag<SemIR::CheckIRId>>;
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} // namespace Carbon
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#endif // CARBON_TOOLCHAIN_SEM_IR_INTERFACE_H_
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