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75 lines
3.2 KiB
C++
75 lines
3.2 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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#include "toolchain/lower/function_context.h"
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#include "toolchain/sem_ir/file.h"
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namespace Carbon::Lower {
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auto HandleBindValue(FunctionContext& context, SemIR::InstId inst_id,
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SemIR::BindValue inst) -> void {
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switch (auto rep =
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SemIR::GetValueRepresentation(context.sem_ir(), inst.type_id);
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rep.kind) {
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case SemIR::ValueRepresentation::Unknown:
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CARBON_FATAL()
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<< "Value binding for type with incomplete value representation";
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case SemIR::ValueRepresentation::None:
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// Nothing should use this value, but StubReference needs a value to
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// propagate.
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// TODO: Remove this now the StubReferences are gone.
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context.SetLocal(inst_id,
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llvm::PoisonValue::get(context.GetType(inst.type_id)));
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break;
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case SemIR::ValueRepresentation::Copy:
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context.SetLocal(inst_id, context.builder().CreateLoad(
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context.GetType(inst.type_id),
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context.GetValue(inst.value_id)));
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break;
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case SemIR::ValueRepresentation::Pointer:
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context.SetLocal(inst_id, context.GetValue(inst.value_id));
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break;
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case SemIR::ValueRepresentation::Custom:
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CARBON_FATAL() << "TODO: Add support for BindValue with custom value rep";
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}
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}
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auto HandleTemporary(FunctionContext& context, SemIR::InstId inst_id,
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SemIR::Temporary inst) -> void {
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context.FinishInitialization(inst.type_id, inst.storage_id, inst.init_id);
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context.SetLocal(inst_id, context.GetValue(inst.storage_id));
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}
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auto HandleTemporaryStorage(FunctionContext& context, SemIR::InstId inst_id,
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SemIR::TemporaryStorage inst) -> void {
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context.SetLocal(inst_id,
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context.builder().CreateAlloca(context.GetType(inst.type_id),
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nullptr, "temp"));
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}
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auto HandleValueAsReference(FunctionContext& context, SemIR::InstId inst_id,
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SemIR::ValueAsReference inst) -> void {
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CARBON_CHECK(SemIR::GetExprCategory(context.sem_ir(), inst.value_id) ==
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SemIR::ExprCategory::Value);
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CARBON_CHECK(
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SemIR::GetValueRepresentation(context.sem_ir(), inst.type_id).kind ==
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SemIR::ValueRepresentation::Pointer);
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context.SetLocal(inst_id, context.GetValue(inst.value_id));
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}
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auto HandleValueOfInitializer(FunctionContext& context, SemIR::InstId inst_id,
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SemIR::ValueOfInitializer inst) -> void {
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CARBON_CHECK(SemIR::GetExprCategory(context.sem_ir(), inst.init_id) ==
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SemIR::ExprCategory::Initializing);
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CARBON_CHECK(
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SemIR::GetValueRepresentation(context.sem_ir(), inst.type_id).kind ==
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SemIR::ValueRepresentation::Copy);
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CARBON_CHECK(
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SemIR::GetInitializingRepresentation(context.sem_ir(), inst.type_id)
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.kind == SemIR::InitializingRepresentation::ByCopy);
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context.SetLocal(inst_id, context.GetValue(inst.init_id));
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}
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} // namespace Carbon::Lower
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