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Richard Smith
4e5dccdbf7
This preserves the constant values of the arguments to the thunk, which is important if the thunk requires conversion of an `IntLiteral` to some other type. This should become unnecessary once we have form support, but avoiding the indirection through a thunk function seems valuable even once that support is in place. To support this, track whether a function is a thunk on the Function object, and if so, what the callee of the thunk is. This information is also included in formatted SemIR when dumping the thunk.
39 lines
1.6 KiB
C++
39 lines
1.6 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_CHECK_THUNK_H_
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#define CARBON_TOOLCHAIN_CHECK_THUNK_H_
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#include "toolchain/check/context.h"
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#include "toolchain/check/deferred_definition_worklist.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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// Given a function signature and a callee function, build a thunk that matches
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// the given signature and calls the specified callee. Returns the callee
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// unchanged if it can be used directly.
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auto BuildThunk(Context& context, SemIR::FunctionId signature_id,
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SemIR::SpecificId signature_specific_id,
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SemIR::InstId callee_id) -> SemIR::InstId;
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// Builds a call to a function that forwards a call argument list built for
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// `function_id` to a call to `callee_id`, for use when building a call from a
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// thunk to its target. This is like `PerformCall`, except that it takes a list
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// of call arguments for `function_id`, not a syntactic argument list.
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auto PerformThunkCall(Context& context, SemIR::LocId loc_id,
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SemIR::FunctionId function_id,
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llvm::ArrayRef<SemIR::InstId> call_arg_ids,
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SemIR::InstId callee_id) -> SemIR::InstId;
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// Builds the definition for a thunk whose definition was deferred until the end
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// of the enclosing scope.
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auto BuildThunkDefinition(Context& context,
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DeferredDefinitionWorklist::DefineThunk&& task)
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-> void;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_THUNK_H_
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