| //===----- CGCall.h - Encapsulate calling convention details ----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // These classes wrap the information about a call or function |
| // definition used to handle ABI compliancy. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef CLANG_CODEGEN_CGCALL_H |
| #define CLANG_CODEGEN_CGCALL_H |
| |
| #include "llvm/ADT/FoldingSet.h" |
| #include "llvm/Value.h" |
| #include "clang/AST/Type.h" |
| #include "clang/AST/CanonicalType.h" |
| |
| #include "CGValue.h" |
| |
| // FIXME: Restructure so we don't have to expose so much stuff. |
| #include "ABIInfo.h" |
| |
| namespace llvm { |
| struct AttributeWithIndex; |
| class Function; |
| class Type; |
| class Value; |
| |
| template<typename T, unsigned> class SmallVector; |
| } |
| |
| namespace clang { |
| class ASTContext; |
| class Decl; |
| class FunctionDecl; |
| class ObjCMethodDecl; |
| class VarDecl; |
| |
| namespace CodeGen { |
| typedef llvm::SmallVector<llvm::AttributeWithIndex, 8> AttributeListType; |
| |
| /// CallArgList - Type for representing both the value and type of |
| /// arguments in a call. |
| class CallArgList : |
| public llvm::SmallVector<std::pair<RValue, QualType>, 16> { |
| }; |
| |
| /// FunctionArgList - Type for representing both the decl and type |
| /// of parameters to a function. The decl must be either a |
| /// ParmVarDecl or ImplicitParamDecl. |
| class FunctionArgList : public llvm::SmallVector<const VarDecl*, 16> { |
| }; |
| |
| /// CGFunctionInfo - Class to encapsulate the information about a |
| /// function definition. |
| class CGFunctionInfo : public llvm::FoldingSetNode { |
| struct ArgInfo { |
| CanQualType type; |
| ABIArgInfo info; |
| }; |
| |
| /// The LLVM::CallingConv to use for this function (as specified by the |
| /// user). |
| unsigned CallingConvention; |
| |
| /// The LLVM::CallingConv to actually use for this function, which may |
| /// depend on the ABI. |
| unsigned EffectiveCallingConvention; |
| |
| /// Whether this function is noreturn. |
| bool NoReturn; |
| |
| unsigned NumArgs; |
| ArgInfo *Args; |
| |
| /// How many arguments to pass inreg. |
| unsigned RegParm; |
| |
| public: |
| typedef const ArgInfo *const_arg_iterator; |
| typedef ArgInfo *arg_iterator; |
| |
| CGFunctionInfo(unsigned CallingConvention, bool NoReturn, |
| unsigned RegParm, CanQualType ResTy, |
| const CanQualType *ArgTys, unsigned NumArgTys); |
| ~CGFunctionInfo() { delete[] Args; } |
| |
| const_arg_iterator arg_begin() const { return Args + 1; } |
| const_arg_iterator arg_end() const { return Args + 1 + NumArgs; } |
| arg_iterator arg_begin() { return Args + 1; } |
| arg_iterator arg_end() { return Args + 1 + NumArgs; } |
| |
| unsigned arg_size() const { return NumArgs; } |
| |
| bool isNoReturn() const { return NoReturn; } |
| |
| /// getCallingConvention - Return the user specified calling |
| /// convention. |
| unsigned getCallingConvention() const { return CallingConvention; } |
| |
| /// getEffectiveCallingConvention - Return the actual calling convention to |
| /// use, which may depend on the ABI. |
| unsigned getEffectiveCallingConvention() const { |
| return EffectiveCallingConvention; |
| } |
| void setEffectiveCallingConvention(unsigned Value) { |
| EffectiveCallingConvention = Value; |
| } |
| |
| unsigned getRegParm() const { return RegParm; } |
| |
| CanQualType getReturnType() const { return Args[0].type; } |
| |
| ABIArgInfo &getReturnInfo() { return Args[0].info; } |
| const ABIArgInfo &getReturnInfo() const { return Args[0].info; } |
| |
| void Profile(llvm::FoldingSetNodeID &ID) { |
| ID.AddInteger(getCallingConvention()); |
| ID.AddBoolean(NoReturn); |
| ID.AddInteger(RegParm); |
| getReturnType().Profile(ID); |
| for (arg_iterator it = arg_begin(), ie = arg_end(); it != ie; ++it) |
| it->type.Profile(ID); |
| } |
| template<class Iterator> |
| static void Profile(llvm::FoldingSetNodeID &ID, |
| const FunctionType::ExtInfo &Info, |
| CanQualType ResTy, |
| Iterator begin, |
| Iterator end) { |
| ID.AddInteger(Info.getCC()); |
| ID.AddBoolean(Info.getNoReturn()); |
| ID.AddInteger(Info.getRegParm()); |
| ResTy.Profile(ID); |
| for (; begin != end; ++begin) { |
| CanQualType T = *begin; // force iterator to be over canonical types |
| T.Profile(ID); |
| } |
| } |
| }; |
| |
| /// ReturnValueSlot - Contains the address where the return value of a |
| /// function can be stored, and whether the address is volatile or not. |
| class ReturnValueSlot { |
| llvm::PointerIntPair<llvm::Value *, 1, bool> Value; |
| |
| public: |
| ReturnValueSlot() {} |
| ReturnValueSlot(llvm::Value *Value, bool IsVolatile) |
| : Value(Value, IsVolatile) {} |
| |
| bool isNull() const { return !getValue(); } |
| |
| bool isVolatile() const { return Value.getInt(); } |
| llvm::Value *getValue() const { return Value.getPointer(); } |
| }; |
| |
| } // end namespace CodeGen |
| } // end namespace clang |
| |
| #endif |