llvm-project/clang/lib/CodeGen/CodeGenModule.h

271 lines
9.9 KiB
C++

//===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is the internal per-translation-unit state used for llvm translation.
//
//===----------------------------------------------------------------------===//
#ifndef CLANG_CODEGEN_CODEGENMODULE_H
#define CLANG_CODEGEN_CODEGENMODULE_H
#include "CodeGenTypes.h"
#include "clang/AST/Attr.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "CGCall.h"
namespace llvm {
class Module;
class Constant;
class Function;
class GlobalValue;
class TargetData;
class FunctionType;
}
namespace clang {
class ASTContext;
class FunctionDecl;
class IdentifierInfo;
class ObjCMethodDecl;
class ObjCImplementationDecl;
class ObjCCategoryImplDecl;
class ObjCProtocolDecl;
class Decl;
class Expr;
class Stmt;
class StringLiteral;
class NamedDecl;
class ValueDecl;
class VarDecl;
struct LangOptions;
class Diagnostic;
class AnnotateAttr;
namespace CodeGen {
class CodeGenFunction;
class CGDebugInfo;
class CGObjCRuntime;
/// CodeGenModule - This class organizes the cross-function state that
/// is used while generating LLVM code.
class CodeGenModule {
typedef std::vector< std::pair<llvm::Constant*, int> > CtorList;
ASTContext &Context;
const LangOptions &Features;
llvm::Module &TheModule;
const llvm::TargetData &TheTargetData;
Diagnostic &Diags;
CodeGenTypes Types;
CGObjCRuntime* Runtime;
CGDebugInfo* DebugInfo;
llvm::Function *MemCpyFn;
llvm::Function *MemMoveFn;
llvm::Function *MemSetFn;
/// GlobalDeclMap - Mapping of decl names global variables we have
/// already emitted. Note that the entries in this map are the
/// actual globals and therefore may not be of the same type as the
/// decl, they should be bitcasted on retrieval. Also note that the
/// globals are keyed on their source name, not the global name
/// (which may change with attributes such as asm-labels).
llvm::DenseMap<IdentifierInfo*, llvm::GlobalValue*> GlobalDeclMap;
/// Aliases - List of aliases in module. These cannot be emitted
/// until all the code has been seen, as they reference things by
/// name instead of directly and may reference forward.
std::vector<const FunctionDecl*> Aliases;
/// StaticDecls - List of static global for which code generation is
/// delayed. When the translation unit has been fully processed we
/// will lazily emit definitions for only the decls that were
/// actually used. This should contain only Function and Var decls,
/// and only those which actually define something.
std::vector<const ValueDecl*> StaticDecls;
/// GlobalCtors - Store the list of global constructors and their
/// respective priorities to be emitted when the translation unit is
/// complete.
CtorList GlobalCtors;
/// GlobalDtors - Store the list of global destructors and their
/// respective priorities to be emitted when the translation unit is
/// complete.
CtorList GlobalDtors;
std::vector<llvm::Constant*> Annotations;
llvm::StringMap<llvm::Constant*> CFConstantStringMap;
llvm::StringMap<llvm::Constant*> ConstantStringMap;
/// CFConstantStringClassRef - Cached reference to the class for
/// constant strings. This value has type int * but is actually an
/// Obj-C class pointer.
llvm::Constant *CFConstantStringClassRef;
std::vector<llvm::Function *> BuiltinFunctions;
public:
CodeGenModule(ASTContext &C, const LangOptions &Features, llvm::Module &M,
const llvm::TargetData &TD, Diagnostic &Diags,
bool GenerateDebugInfo);
~CodeGenModule();
/// Release - Finalize LLVM code generation.
void Release();
/// getObjCRuntime() - Return a reference to the configured
/// Objective-C runtime.
CGObjCRuntime &getObjCRuntime() {
assert(Runtime && "No Objective-C runtime has been configured.");
return *Runtime;
}
/// hasObjCRuntime() - Return true iff an Objective-C runtime has
/// been configured.
bool hasObjCRuntime() { return !!Runtime; }
CGDebugInfo *getDebugInfo() { return DebugInfo; }
ASTContext &getContext() const { return Context; }
const LangOptions &getLangOptions() const { return Features; }
llvm::Module &getModule() const { return TheModule; }
CodeGenTypes &getTypes() { return Types; }
Diagnostic &getDiags() const { return Diags; }
const llvm::TargetData &getTargetData() const { return TheTargetData; }
/// GetAddrOfGlobalVar - Return the llvm::Constant for the address
/// of the given global variable.
llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D);
/// GetAddrOfFunction - Return the llvm::Constant for the address
/// of the given function.
llvm::Constant *GetAddrOfFunction(const FunctionDecl *D);
/// GetStringForStringLiteral - Return the appropriate bytes for a
/// string literal, properly padded to match the literal type. If
/// only the address of a constant is needed consider using
/// GetAddrOfConstantStringLiteral.
std::string GetStringForStringLiteral(const StringLiteral *E);
/// GetAddrOfConstantCFString - Return a pointer to a
/// constant CFString object for the given string.
llvm::Constant *GetAddrOfConstantCFString(const std::string& str);
/// GetAddrOfConstantStringFromLiteral - Return a pointer to a
/// constant array for the given string literal.
llvm::Constant *GetAddrOfConstantStringFromLiteral(const StringLiteral *S);
/// GetAddrOfConstantString - Returns a pointer to a character array
/// containing the literal. This contents are exactly that of the
/// given string, i.e. it will not be null terminated automatically;
/// see GetAddrOfConstantCString. Note that whether the result is
/// actually a pointer to an LLVM constant depends on
/// Feature.WriteableStrings.
///
/// The result has pointer to array type.
llvm::Constant *GetAddrOfConstantString(const std::string& str);
/// GetAddrOfConstantCString - Returns a pointer to a character
/// array containing the literal and a terminating '\-'
/// character. The result has pointer to array type.
llvm::Constant *GetAddrOfConstantCString(const std::string &str);
/// getBuiltinLibFunction - Given a builtin id for a function like
/// "__builtin_fabsf", return a Function* for "fabsf".
llvm::Function *getBuiltinLibFunction(unsigned BuiltinID);
llvm::Function *getMemCpyFn();
llvm::Function *getMemMoveFn();
llvm::Function *getMemSetFn();
llvm::Function *getIntrinsic(unsigned IID, const llvm::Type **Tys = 0,
unsigned NumTys = 0);
/// EmitTopLevelDecl - Emit code for a single top level declaration.
void EmitTopLevelDecl(Decl *D);
void AddAnnotation(llvm::Constant *C) { Annotations.push_back(C); }
void UpdateCompletedType(const TagDecl *D);
llvm::Constant *EmitConstantExpr(const Expr *E, CodeGenFunction *CGF = 0);
llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
const AnnotateAttr *AA, unsigned LineNo);
/// ErrorUnsupported - Print out an error that codegen doesn't support the
/// specified stmt yet.
/// \param OmitOnError - If true, then this error should only be
/// emitted if no other errors have been reported.
void ErrorUnsupported(const Stmt *S, const char *Type,
bool OmitOnError=false);
/// ErrorUnsupported - Print out an error that codegen doesn't support the
/// specified decl yet.
/// \param OmitOnError - If true, then this error should only be
/// emitted if no other errors have been reported.
void ErrorUnsupported(const Decl *D, const char *Type,
bool OmitOnError=false);
void SetMethodAttributes(const ObjCMethodDecl *MD,
llvm::Function *F);
void SetFunctionParamAttrs(const Decl *D,
const CGFunctionInfo &Info,
llvm::Function *F);
/// ReturnTypeUsesSret - Return true iff the given type uses 'sret'
/// when used as a return type.
bool ReturnTypeUsesSret(QualType RetTy);
void ConstructParamAttrList(const Decl *TargetDecl,
const ArgTypeIterator begin,
const ArgTypeIterator end,
ParamAttrListType &PAL);
private:
/// SetFunctionAttributesForDefinition - Set function attributes
/// specific to a function definition.
/// \param D - The ObjCMethodDecl or FunctionDecl defining \arg F.
void SetFunctionAttributesForDefinition(const Decl *D,
llvm::Function *F);
void SetFunctionAttributes(const FunctionDecl *FD,
llvm::Function *F);
/// EmitGlobal - Emit code for a singal global function or var
/// decl. Forward declarations are emitted lazily.
void EmitGlobal(const ValueDecl *D);
void EmitGlobalDefinition(const ValueDecl *D);
llvm::GlobalValue *EmitForwardFunctionDefinition(const FunctionDecl *D);
void EmitGlobalFunctionDefinition(const FunctionDecl *D);
void EmitGlobalVarDefinition(const VarDecl *D);
void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
// FIXME: Hardcoding priority here is gross.
void AddGlobalCtor(llvm::Function * Ctor, int Priority=65535);
void AddGlobalDtor(llvm::Function * Dtor, int Priority=65535);
/// EmitCtorList - Generates a global array of functions and
/// priorities using the given list and name. This array will have
/// appending linkage and is suitable for use as a LLVM constructor
/// or destructor array.
void EmitCtorList(const CtorList &Fns, const char *GlobalName);
void EmitAliases(void);
void EmitAnnotations(void);
void EmitStatics(void);
};
} // end namespace CodeGen
} // end namespace clang
#endif