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114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
//===--- Signature.h - An IR function signature -----------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the Signature type, which encapsulates all the
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// information necessary to call a function value correctly.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_SIGNATURE_H
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#define SWIFT_IRGEN_SIGNATURE_H
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#include "llvm/IR/Attributes.h"
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#include "llvm/IR/CallingConv.h"
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#include "swift/AST/Types.h"
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namespace llvm {
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class FunctionType;
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}
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namespace clang {
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namespace CodeGen {
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class CGFunctionInfo;
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}
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}
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namespace swift {
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class Identifier;
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enum class SILFunctionTypeRepresentation : uint8_t;
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class SILType;
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namespace irgen {
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class IRGenModule;
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/// An encapsulation of different foreign calling-convention lowering
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/// information we might have. Should be interpreted according to the
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/// abstract CC of the formal function type.
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class ForeignFunctionInfo {
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public:
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const clang::CodeGen::CGFunctionInfo *ClangInfo = nullptr;
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};
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/// A signature represents something which can actually be called.
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class Signature {
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llvm::FunctionType *Type = nullptr;
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llvm::AttributeList Attributes;
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ForeignFunctionInfo ForeignInfo;
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llvm::CallingConv::ID CallingConv;
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public:
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Signature() {}
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Signature(llvm::FunctionType *fnType, llvm::AttributeList attrs,
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llvm::CallingConv::ID callingConv)
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: Type(fnType), Attributes(attrs), CallingConv(callingConv) {}
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bool isValid() const {
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return Type != nullptr;
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}
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/// Compute the signature of the given type.
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///
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/// This is a private detail of the implementation of
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/// IRGenModule::getSignature(CanSILFunctionType), which is what
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/// clients should generally be using.
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static Signature getUncached(IRGenModule &IGM,
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CanSILFunctionType formalType);
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llvm::FunctionType *getType() const {
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assert(isValid());
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return Type;
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}
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llvm::CallingConv::ID getCallingConv() const {
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assert(isValid());
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return CallingConv;
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}
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llvm::AttributeList getAttributes() const {
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assert(isValid());
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return Attributes;
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}
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ForeignFunctionInfo getForeignInfo() const {
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assert(isValid());
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return ForeignInfo;
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}
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// The mutators below should generally only be used when building up
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// a callee.
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void setType(llvm::FunctionType *type) {
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Type = type;
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}
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llvm::AttributeList &getMutableAttributes() & {
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assert(isValid());
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return Attributes;
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}
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};
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} // end namespace irgen
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} // end namespace swift
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#endif
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