79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
//===----- ABIInfo.h - ABI information access & encapsulation ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CLANG_CODEGEN_ABIINFO_H
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#define CLANG_CODEGEN_ABIINFO_H
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#include "clang/AST/Type.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IR/CallingConv.h"
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namespace llvm {
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class Value;
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class LLVMContext;
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class DataLayout;
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}
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namespace clang {
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class ASTContext;
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class TargetInfo;
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namespace CodeGen {
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class CGCXXABI;
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class CGFunctionInfo;
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class CodeGenFunction;
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class CodeGenTypes;
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}
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// FIXME: All of this stuff should be part of the target interface
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// somehow. It is currently here because it is not clear how to factor
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// the targets to support this, since the Targets currently live in a
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// layer below types n'stuff.
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/// ABIInfo - Target specific hooks for defining how a type should be
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/// passed or returned from functions.
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class ABIInfo {
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public:
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CodeGen::CodeGenTypes &CGT;
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protected:
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llvm::CallingConv::ID RuntimeCC;
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public:
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ABIInfo(CodeGen::CodeGenTypes &cgt)
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: CGT(cgt), RuntimeCC(llvm::CallingConv::C) {}
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virtual ~ABIInfo();
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CodeGen::CGCXXABI &getCXXABI() const;
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ASTContext &getContext() const;
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llvm::LLVMContext &getVMContext() const;
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const llvm::DataLayout &getDataLayout() const;
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const TargetInfo &getTarget() const;
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/// Return the calling convention to use for system runtime
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/// functions.
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llvm::CallingConv::ID getRuntimeCC() const {
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return RuntimeCC;
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}
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virtual void computeInfo(CodeGen::CGFunctionInfo &FI) const = 0;
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/// EmitVAArg - Emit the target dependent code to load a value of
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/// \arg Ty from the va_list pointed to by \arg VAListAddr.
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// FIXME: This is a gaping layering violation if we wanted to drop
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// the ABI information any lower than CodeGen. Of course, for
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// VAArg handling it has to be at this level; there is no way to
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// abstract this out.
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virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
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CodeGen::CodeGenFunction &CGF) const = 0;
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};
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} // end namespace clang
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#endif
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