//
//===----------------------------------------------------------------------===//
-#ifndef CLANG_CODEGEN_CXXABI_H
-#define CLANG_CODEGEN_CXXABI_H
+#ifndef LLVM_CLANG_LIB_CODEGEN_CGCXXABI_H
+#define LLVM_CLANG_LIB_CODEGEN_CGCXXABI_H
#include "CodeGenFunction.h"
#include "clang/Basic/LLVM.h"
namespace llvm {
- class Constant;
- class Type;
- class Value;
+class Constant;
+class Type;
+class Value;
}
namespace clang {
- class CastExpr;
- class CXXConstructorDecl;
- class CXXDestructorDecl;
- class CXXMethodDecl;
- class CXXRecordDecl;
- class FieldDecl;
- class MangleContext;
+class CastExpr;
+class CXXConstructorDecl;
+class CXXDestructorDecl;
+class CXXMethodDecl;
+class CXXRecordDecl;
+class FieldDecl;
+class MangleContext;
namespace CodeGen {
- class CodeGenFunction;
- class CodeGenModule;
+class CodeGenFunction;
+class CodeGenModule;
/// \brief Implements C++ ABI-specific code generation functions.
class CGCXXABI {
protected:
CodeGenModule &CGM;
- OwningPtr<MangleContext> MangleCtx;
+ std::unique_ptr<MangleContext> MangleCtx;
CGCXXABI(CodeGenModule &CGM)
: CGM(CGM), MangleCtx(CGM.getContext().createMangleContext()) {}
/// Get a null value for unsupported member pointers.
llvm::Constant *GetBogusMemberPointer(QualType T);
- // FIXME: Every place that calls getVTT{Decl,Value} is something
- // that needs to be abstracted properly.
- ImplicitParamDecl *&getVTTDecl(CodeGenFunction &CGF) {
- return CGF.CXXStructorImplicitParamDecl;
- }
- llvm::Value *&getVTTValue(CodeGenFunction &CGF) {
- return CGF.CXXStructorImplicitParamValue;
- }
-
ImplicitParamDecl *&getStructorImplicitParamDecl(CodeGenFunction &CGF) {
return CGF.CXXStructorImplicitParamDecl;
}
return CGF.CXXStructorImplicitParamValue;
}
- /// Build a parameter variable suitable for 'this'.
- void BuildThisParam(CodeGenFunction &CGF, FunctionArgList &Params);
-
/// Perform prolog initialization of the parameter variable suitable
- /// for 'this' emitted by BuildThisParam.
+ /// for 'this' emitted by buildThisParam.
void EmitThisParam(CodeGenFunction &CGF);
ASTContext &getContext() const { return CGM.getContext(); }
/// when called virtually, and code generation does not support the case.
virtual bool HasThisReturn(GlobalDecl GD) const { return false; }
- /// Returns true if the given record type should be returned indirectly.
- virtual bool isReturnTypeIndirect(const CXXRecordDecl *RD) const = 0;
+ /// If the C++ ABI requires the given type be returned in a particular way,
+ /// this method sets RetAI and returns true.
+ virtual bool classifyReturnType(CGFunctionInfo &FI) const = 0;
/// Specify how one should pass an argument of a record type.
enum RecordArgABI {
RAA_Indirect
};
+ /// Returns true if C++ allows us to copy the memory of an object of type RD
+ /// when it is passed as an argument.
+ bool canCopyArgument(const CXXRecordDecl *RD) const;
+
/// Returns how an argument of the given record type should be passed.
virtual RecordArgABI getRecordArgABI(const CXXRecordDecl *RD) const = 0;
+ /// Returns true if the implicit 'sret' parameter comes after the implicit
+ /// 'this' parameter of C++ instance methods.
+ virtual bool isSRetParameterAfterThis() const { return false; }
+
/// Find the LLVM type used to represent the given member pointer
/// type.
virtual llvm::Type *
/// Load a member function from an object and a member function
/// pointer. Apply the this-adjustment and set 'This' to the
/// adjusted value.
- virtual llvm::Value *
- EmitLoadOfMemberFunctionPointer(CodeGenFunction &CGF,
- llvm::Value *&This,
- llvm::Value *MemPtr,
- const MemberPointerType *MPT);
+ virtual llvm::Value *EmitLoadOfMemberFunctionPointer(
+ CodeGenFunction &CGF, const Expr *E, llvm::Value *&This,
+ llvm::Value *MemPtr, const MemberPointerType *MPT);
/// Calculate an l-value from an object and a data member pointer.
- virtual llvm::Value *EmitMemberDataPointerAddress(CodeGenFunction &CGF,
- llvm::Value *Base,
- llvm::Value *MemPtr,
- const MemberPointerType *MPT);
+ virtual llvm::Value *
+ EmitMemberDataPointerAddress(CodeGenFunction &CGF, const Expr *E,
+ llvm::Value *Base, llvm::Value *MemPtr,
+ const MemberPointerType *MPT);
/// Perform a derived-to-base, base-to-derived, or bitcast member
/// pointer conversion.
/// (in the C++ sense) with an LLVM zeroinitializer.
virtual bool isZeroInitializable(const MemberPointerType *MPT);
+ /// Return whether or not a member pointers type is convertible to an IR type.
+ virtual bool isMemberPointerConvertible(const MemberPointerType *MPT) const {
+ return true;
+ }
+
/// Create a null member pointer of the given type.
virtual llvm::Constant *EmitNullMemberPointer(const MemberPointerType *MPT);
llvm::Value *ptr,
QualType type) = 0;
+ virtual llvm::Constant *getAddrOfRTTIDescriptor(QualType Ty) = 0;
+
+ virtual bool shouldTypeidBeNullChecked(bool IsDeref,
+ QualType SrcRecordTy) = 0;
+ virtual void EmitBadTypeidCall(CodeGenFunction &CGF) = 0;
+ virtual llvm::Value *EmitTypeid(CodeGenFunction &CGF, QualType SrcRecordTy,
+ llvm::Value *ThisPtr,
+ llvm::Type *StdTypeInfoPtrTy) = 0;
+
+ virtual bool shouldDynamicCastCallBeNullChecked(bool SrcIsPtr,
+ QualType SrcRecordTy) = 0;
+
+ virtual llvm::Value *
+ EmitDynamicCastCall(CodeGenFunction &CGF, llvm::Value *Value,
+ QualType SrcRecordTy, QualType DestTy,
+ QualType DestRecordTy, llvm::BasicBlock *CastEnd) = 0;
+
+ virtual llvm::Value *EmitDynamicCastToVoid(CodeGenFunction &CGF,
+ llvm::Value *Value,
+ QualType SrcRecordTy,
+ QualType DestTy) = 0;
+
+ virtual bool EmitBadCastCall(CodeGenFunction &CGF) = 0;
+
virtual llvm::Value *GetVirtualBaseClassOffset(CodeGenFunction &CGF,
llvm::Value *This,
const CXXRecordDecl *ClassDecl,
virtual llvm::BasicBlock *EmitCtorCompleteObjectHandler(CodeGenFunction &CGF,
const CXXRecordDecl *RD);
+ /// Emit the code to initialize hidden members required
+ /// to handle virtual inheritance, if needed by the ABI.
+ virtual void
+ initializeHiddenVirtualInheritanceMembers(CodeGenFunction &CGF,
+ const CXXRecordDecl *RD) {}
+
/// Emit constructor variants required by this ABI.
virtual void EmitCXXConstructors(const CXXConstructorDecl *D) = 0;
}
/// Perform ABI-specific "this" argument adjustment required prior to
- /// a virtual function call.
- virtual llvm::Value *adjustThisArgumentForVirtualCall(CodeGenFunction &CGF,
- GlobalDecl GD,
- llvm::Value *This) {
+ /// a call of a virtual function.
+ /// The "VirtualCall" argument is true iff the call itself is virtual.
+ virtual llvm::Value *
+ adjustThisArgumentForVirtualFunctionCall(CodeGenFunction &CGF, GlobalDecl GD,
+ llvm::Value *This,
+ bool VirtualCall) {
return This;
}
- /// Build the ABI-specific portion of the parameter list for a
- /// function. This generally involves a 'this' parameter and
- /// possibly some extra data for constructors and destructors.
+ /// Build a parameter variable suitable for 'this'.
+ void buildThisParam(CodeGenFunction &CGF, FunctionArgList &Params);
+
+ /// Insert any ABI-specific implicit parameters into the parameter list for a
+ /// function. This generally involves extra data for constructors and
+ /// destructors.
///
/// ABIs may also choose to override the return type, which has been
/// initialized with the type of 'this' if HasThisReturn(CGF.CurGD) is true or
/// the formal return type of the function otherwise.
- virtual void BuildInstanceFunctionParams(CodeGenFunction &CGF,
- QualType &ResTy,
- FunctionArgList &Params) = 0;
+ virtual void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy,
+ FunctionArgList &Params) = 0;
/// Perform ABI-specific "this" parameter adjustment in a virtual function
/// prologue.
/// Emit the ABI-specific prolog for the function.
virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF) = 0;
- /// Emit the constructor call. Return the function that is called.
- virtual void EmitConstructorCall(CodeGenFunction &CGF,
- const CXXConstructorDecl *D,
- CXXCtorType Type,
- bool ForVirtualBase, bool Delegating,
- llvm::Value *This,
- CallExpr::const_arg_iterator ArgBeg,
- CallExpr::const_arg_iterator ArgEnd) = 0;
+ /// Add any ABI-specific implicit arguments needed to call a constructor.
+ ///
+ /// \return The number of args added to the call, which is typically zero or
+ /// one.
+ virtual unsigned
+ addImplicitConstructorArgs(CodeGenFunction &CGF, const CXXConstructorDecl *D,
+ CXXCtorType Type, bool ForVirtualBase,
+ bool Delegating, CallArgList &Args) = 0;
+
+ /// Emit the destructor call.
+ virtual void EmitDestructorCall(CodeGenFunction &CGF,
+ const CXXDestructorDecl *DD, CXXDtorType Type,
+ bool ForVirtualBase, bool Delegating,
+ llvm::Value *This) = 0;
/// Emits the VTable definitions required for the given record type.
virtual void emitVTableDefinitions(CodeGenVTables &CGVT,
SourceLocation CallLoc,
llvm::Value *This) = 0;
+ virtual void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF,
+ GlobalDecl GD,
+ CallArgList &CallArgs) {}
+
/// Emit any tables needed to implement virtual inheritance. For Itanium,
/// this emits virtual table tables. For the MSVC++ ABI, this emits virtual
/// base tables.
virtual void emitVirtualInheritanceTables(const CXXRecordDecl *RD) = 0;
+ virtual void setThunkLinkage(llvm::Function *Thunk, bool ForVTable,
+ GlobalDecl GD, bool ReturnAdjustment) = 0;
+
+ virtual llvm::Value *performThisAdjustment(CodeGenFunction &CGF,
+ llvm::Value *This,
+ const ThisAdjustment &TA) = 0;
+
+ virtual llvm::Value *performReturnAdjustment(CodeGenFunction &CGF,
+ llvm::Value *Ret,
+ const ReturnAdjustment &RA) = 0;
+
virtual void EmitReturnFromThunk(CodeGenFunction &CGF,
RValue RV, QualType ResultType);
/// initialization or non-trivial destruction for thread_local
/// variables, a function to perform the initialization. Otherwise, 0.
virtual void EmitThreadLocalInitFuncs(
- llvm::ArrayRef<std::pair<const VarDecl *, llvm::GlobalVariable *> > Decls,
+ ArrayRef<std::pair<const VarDecl *, llvm::GlobalVariable *> > Decls,
llvm::Function *InitFunc);
/// Emit a reference to a non-local thread_local variable (including
/// triggering the initialization of all thread_local variables in its
/// translation unit).
- virtual LValue EmitThreadLocalDeclRefExpr(CodeGenFunction &CGF,
- const DeclRefExpr *DRE);
+ virtual LValue EmitThreadLocalVarDeclLValue(CodeGenFunction &CGF,
+ const VarDecl *VD,
+ QualType LValType);
};
// Create an instance of a C++ ABI class:
projects / clang / blobdiff