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3519e0cd25
SubstitutionList is going to be a more compact representation of a SubstitutionMap, suitable for inline allocation inside another object. For now, it's just a typedef for ArrayRef<Substitution>.
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
//===--- Callee.h - Information about a physical callee ---------*- 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 Callee type, which stores all necessary
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// information about a physical callee.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_CALLEE_H
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#define SWIFT_IRGEN_CALLEE_H
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#include <type_traits>
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#include "llvm/IR/DerivedTypes.h"
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#include "swift/SIL/SILType.h"
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#include "Explosion.h"
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#include "IRGen.h"
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#include "Signature.h"
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namespace llvm {
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class PointerType;
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}
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namespace swift {
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class Substitution;
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namespace irgen {
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class Callee;
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class IRGenFunction;
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class Callee {
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/// The unsubstituted function type being called.
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CanSILFunctionType OrigFnType;
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/// The substituted result type of the function being called.
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CanSILFunctionType SubstFnType;
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/// The clang information for the function being called, if applicable.
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ForeignFunctionInfo ForeignInfo;
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/// The pointer to the actual function.
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llvm::Value *FnPtr;
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/// The data pointer required by the function. There's an
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/// invariant that this never stores an llvm::ConstantPointerNull.
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llvm::Value *DataPtr;
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/// The archetype substitutions under which the function is being
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/// called.
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std::vector<Substitution> Substitutions;
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public:
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Callee() = default;
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/// Prepare a callee for a known function with a known data pointer.
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static Callee forKnownFunction(CanSILFunctionType origFnType,
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CanSILFunctionType substFnType,
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SubstitutionList subs,
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llvm::Value *fn, llvm::Value *data,
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ForeignFunctionInfo foreignInfo) {
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// Invariant on the function pointer.
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assert(fn->getType()->getPointerElementType()->isFunctionTy());
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assert((foreignInfo.ClangInfo != nullptr) ==
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(origFnType->getLanguage() == SILFunctionLanguage::C));
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Callee result;
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result.OrigFnType = origFnType;
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result.SubstFnType = substFnType;
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result.FnPtr = fn;
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result.DataPtr = data;
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result.Substitutions = subs;
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result.ForeignInfo = foreignInfo;
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return result;
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}
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SILFunctionTypeRepresentation getRepresentation() const {
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return OrigFnType->getRepresentation();
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}
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CanSILFunctionType getOrigFunctionType() const { return OrigFnType; }
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CanSILFunctionType getSubstFunctionType() const { return SubstFnType; }
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bool hasSubstitutions() const { return !Substitutions.empty(); }
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SubstitutionList getSubstitutions() const { return Substitutions; }
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llvm::Value *getFunction() const { return FnPtr; }
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llvm::FunctionType *getLLVMFunctionType() {
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return cast<llvm::FunctionType>(FnPtr->getType()->getPointerElementType());
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}
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const ForeignFunctionInfo &getForeignInfo() const {
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return ForeignInfo;
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}
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/// Return the function pointer as an i8*.
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llvm::Value *getOpaqueFunctionPointer(IRGenFunction &IGF) const;
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/// Return the function pointer as an appropriate pointer-to-function.
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llvm::Value *getFunctionPointer() const { return FnPtr; }
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/// Is it possible that this function requires a non-null data pointer?
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bool hasDataPointer() const { return DataPtr != nullptr; }
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/// Return the data pointer as a %swift.refcounted*.
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llvm::Value *getDataPointer(IRGenFunction &IGF) const;
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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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