| //===-- CodeGenFunction.h - Per-Function 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-function state used for llvm translation. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef CLANG_CODEGEN_CODEGENFUNCTION_H |
| #define CLANG_CODEGEN_CODEGENFUNCTION_H |
| |
| #include "clang/AST/Type.h" |
| #include "clang/AST/ExprCXX.h" |
| #include "clang/AST/ExprObjC.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/Support/ValueHandle.h" |
| #include <map> |
| #include "CodeGenModule.h" |
| #include "CGBlocks.h" |
| #include "CGBuilder.h" |
| #include "CGCall.h" |
| #include "CGCXX.h" |
| #include "CGValue.h" |
| |
| namespace llvm { |
| class BasicBlock; |
| class LLVMContext; |
| class Module; |
| class SwitchInst; |
| class Value; |
| } |
| |
| namespace clang { |
| class ASTContext; |
| class CXXDestructorDecl; |
| class Decl; |
| class EnumConstantDecl; |
| class FunctionDecl; |
| class FunctionProtoType; |
| class LabelStmt; |
| class ObjCContainerDecl; |
| class ObjCInterfaceDecl; |
| class ObjCIvarDecl; |
| class ObjCMethodDecl; |
| class ObjCImplementationDecl; |
| class ObjCPropertyImplDecl; |
| class TargetInfo; |
| class VarDecl; |
| class ObjCForCollectionStmt; |
| class ObjCAtTryStmt; |
| class ObjCAtThrowStmt; |
| class ObjCAtSynchronizedStmt; |
| |
| namespace CodeGen { |
| class CodeGenModule; |
| class CodeGenTypes; |
| class CGDebugInfo; |
| class CGFunctionInfo; |
| class CGRecordLayout; |
| |
| /// CodeGenFunction - This class organizes the per-function state that is used |
| /// while generating LLVM code. |
| class CodeGenFunction : public BlockFunction { |
| CodeGenFunction(const CodeGenFunction&); // DO NOT IMPLEMENT |
| void operator=(const CodeGenFunction&); // DO NOT IMPLEMENT |
| public: |
| CodeGenModule &CGM; // Per-module state. |
| TargetInfo &Target; |
| |
| typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy; |
| CGBuilderTy Builder; |
| |
| /// CurFuncDecl - Holds the Decl for the current function or ObjC method. |
| /// This excludes BlockDecls. |
| const Decl *CurFuncDecl; |
| /// CurCodeDecl - This is the inner-most code context, which includes blocks. |
| const Decl *CurCodeDecl; |
| const CGFunctionInfo *CurFnInfo; |
| QualType FnRetTy; |
| llvm::Function *CurFn; |
| |
| /// ReturnBlock - Unified return block. |
| llvm::BasicBlock *ReturnBlock; |
| /// ReturnValue - The temporary alloca to hold the return value. This is null |
| /// iff the function has no return value. |
| llvm::Instruction *ReturnValue; |
| |
| /// AllocaInsertPoint - This is an instruction in the entry block before which |
| /// we prefer to insert allocas. |
| llvm::AssertingVH<llvm::Instruction> AllocaInsertPt; |
| |
| const llvm::Type *LLVMIntTy; |
| uint32_t LLVMPointerWidth; |
| |
| public: |
| /// ObjCEHValueStack - Stack of Objective-C exception values, used for |
| /// rethrows. |
| llvm::SmallVector<llvm::Value*, 8> ObjCEHValueStack; |
| |
| /// PushCleanupBlock - Push a new cleanup entry on the stack and set the |
| /// passed in block as the cleanup block. |
| void PushCleanupBlock(llvm::BasicBlock *CleanupBlock); |
| |
| /// CleanupBlockInfo - A struct representing a popped cleanup block. |
| struct CleanupBlockInfo { |
| /// CleanupBlock - the cleanup block |
| llvm::BasicBlock *CleanupBlock; |
| |
| /// SwitchBlock - the block (if any) containing the switch instruction used |
| /// for jumping to the final destination. |
| llvm::BasicBlock *SwitchBlock; |
| |
| /// EndBlock - the default destination for the switch instruction. |
| llvm::BasicBlock *EndBlock; |
| |
| CleanupBlockInfo(llvm::BasicBlock *cb, llvm::BasicBlock *sb, |
| llvm::BasicBlock *eb) |
| : CleanupBlock(cb), SwitchBlock(sb), EndBlock(eb) {} |
| }; |
| |
| /// PopCleanupBlock - Will pop the cleanup entry on the stack, process all |
| /// branch fixups and return a block info struct with the switch block and end |
| /// block. |
| CleanupBlockInfo PopCleanupBlock(); |
| |
| /// CleanupScope - RAII object that will create a cleanup block and set the |
| /// insert point to that block. When destructed, it sets the insert point to |
| /// the previous block and pushes a new cleanup entry on the stack. |
| class CleanupScope { |
| CodeGenFunction& CGF; |
| llvm::BasicBlock *CurBB; |
| llvm::BasicBlock *CleanupBB; |
| |
| public: |
| CleanupScope(CodeGenFunction &cgf) |
| : CGF(cgf), CurBB(CGF.Builder.GetInsertBlock()) { |
| CleanupBB = CGF.createBasicBlock("cleanup"); |
| CGF.Builder.SetInsertPoint(CleanupBB); |
| } |
| |
| ~CleanupScope() { |
| CGF.PushCleanupBlock(CleanupBB); |
| // FIXME: This is silly, move this into the builder. |
| if (CurBB) |
| CGF.Builder.SetInsertPoint(CurBB); |
| else |
| CGF.Builder.ClearInsertionPoint(); |
| } |
| }; |
| |
| /// EmitCleanupBlocks - Takes the old cleanup stack size and emits the cleanup |
| /// blocks that have been added. |
| void EmitCleanupBlocks(size_t OldCleanupStackSize); |
| |
| /// EmitBranchThroughCleanup - Emit a branch from the current insert block |
| /// through the cleanup handling code (if any) and then on to \arg Dest. |
| /// |
| /// FIXME: Maybe this should really be in EmitBranch? Don't we always want |
| /// this behavior for branches? |
| void EmitBranchThroughCleanup(llvm::BasicBlock *Dest); |
| |
| /// PushConditionalTempDestruction - Should be called before a conditional |
| /// part of an expression is emitted. For example, before the RHS of the |
| /// expression below is emitted: |
| /// |
| /// b && f(T()); |
| /// |
| /// This is used to make sure that any temporaryes created in the conditional |
| /// branch are only destroyed if the branch is taken. |
| void PushConditionalTempDestruction(); |
| |
| /// PopConditionalTempDestruction - Should be called after a conditional |
| /// part of an expression has been emitted. |
| void PopConditionalTempDestruction(); |
| |
| private: |
| CGDebugInfo* DebugInfo; |
| |
| /// LabelIDs - Track arbitrary ids assigned to labels for use in implementing |
| /// the GCC address-of-label extension and indirect goto. IDs are assigned to |
| /// labels inside getIDForAddrOfLabel(). |
| std::map<const LabelStmt*, unsigned> LabelIDs; |
| |
| /// IndirectSwitches - Record the list of switches for indirect |
| /// gotos. Emission of the actual switching code needs to be delayed until all |
| /// AddrLabelExprs have been seen. |
| std::vector<llvm::SwitchInst*> IndirectSwitches; |
| |
| /// LocalDeclMap - This keeps track of the LLVM allocas or globals for local C |
| /// decls. |
| llvm::DenseMap<const Decl*, llvm::Value*> LocalDeclMap; |
| |
| /// LabelMap - This keeps track of the LLVM basic block for each C label. |
| llvm::DenseMap<const LabelStmt*, llvm::BasicBlock*> LabelMap; |
| |
| // BreakContinueStack - This keeps track of where break and continue |
| // statements should jump to. |
| struct BreakContinue { |
| BreakContinue(llvm::BasicBlock *bb, llvm::BasicBlock *cb) |
| : BreakBlock(bb), ContinueBlock(cb) {} |
| |
| llvm::BasicBlock *BreakBlock; |
| llvm::BasicBlock *ContinueBlock; |
| }; |
| llvm::SmallVector<BreakContinue, 8> BreakContinueStack; |
| |
| /// SwitchInsn - This is nearest current switch instruction. It is null if if |
| /// current context is not in a switch. |
| llvm::SwitchInst *SwitchInsn; |
| |
| /// CaseRangeBlock - This block holds if condition check for last case |
| /// statement range in current switch instruction. |
| llvm::BasicBlock *CaseRangeBlock; |
| |
| /// InvokeDest - This is the nearest exception target for calls |
| /// which can unwind, when exceptions are being used. |
| llvm::BasicBlock *InvokeDest; |
| |
| // VLASizeMap - This keeps track of the associated size for each VLA type. |
| // We track this by the size expression rather than the type itself because |
| // in certain situations, like a const qualifier applied to an VLA typedef, |
| // multiple VLA types can share the same size expression. |
| // FIXME: Maybe this could be a stack of maps that is pushed/popped as we |
| // enter/leave scopes. |
| llvm::DenseMap<const Expr*, llvm::Value*> VLASizeMap; |
| |
| /// DidCallStackSave - Whether llvm.stacksave has been called. Used to avoid |
| /// calling llvm.stacksave for multiple VLAs in the same scope. |
| bool DidCallStackSave; |
| |
| struct CleanupEntry { |
| /// CleanupBlock - The block of code that does the actual cleanup. |
| llvm::BasicBlock *CleanupBlock; |
| |
| /// Blocks - Basic blocks that were emitted in the current cleanup scope. |
| std::vector<llvm::BasicBlock *> Blocks; |
| |
| /// BranchFixups - Branch instructions to basic blocks that haven't been |
| /// inserted into the current function yet. |
| std::vector<llvm::BranchInst *> BranchFixups; |
| |
| explicit CleanupEntry(llvm::BasicBlock *cb) |
| : CleanupBlock(cb) {} |
| }; |
| |
| /// CleanupEntries - Stack of cleanup entries. |
| llvm::SmallVector<CleanupEntry, 8> CleanupEntries; |
| |
| typedef llvm::DenseMap<llvm::BasicBlock*, size_t> BlockScopeMap; |
| |
| /// BlockScopes - Map of which "cleanup scope" scope basic blocks have. |
| BlockScopeMap BlockScopes; |
| |
| /// CXXThisDecl - When parsing an C++ function, this will hold the implicit |
| /// 'this' declaration. |
| ImplicitParamDecl *CXXThisDecl; |
| |
| /// CXXLiveTemporaryInfo - Holds information about a live C++ temporary. |
| struct CXXLiveTemporaryInfo { |
| /// Temporary - The live temporary. |
| const CXXTemporary *Temporary; |
| |
| /// ThisPtr - The pointer to the temporary. |
| llvm::Value *ThisPtr; |
| |
| /// DtorBlock - The destructor block. |
| llvm::BasicBlock *DtorBlock; |
| |
| /// CondPtr - If this is a conditional temporary, this is the pointer to |
| /// the condition variable that states whether the destructor should be |
| /// called or not. |
| llvm::Value *CondPtr; |
| |
| CXXLiveTemporaryInfo(const CXXTemporary *temporary, |
| llvm::Value *thisptr, llvm::BasicBlock *dtorblock, |
| llvm::Value *condptr) |
| : Temporary(temporary), ThisPtr(thisptr), DtorBlock(dtorblock), |
| CondPtr(condptr) { } |
| }; |
| |
| llvm::SmallVector<CXXLiveTemporaryInfo, 4> LiveTemporaries; |
| |
| /// ConditionalTempDestructionStack - Contains the number of live temporaries |
| /// when PushConditionalTempDestruction was called. This is used so that |
| /// we know how many temporaries were created by a certain expression. |
| llvm::SmallVector<size_t, 4> ConditionalTempDestructionStack; |
| |
| public: |
| CodeGenFunction(CodeGenModule &cgm); |
| |
| ASTContext &getContext() const; |
| CGDebugInfo *getDebugInfo() { return DebugInfo; } |
| |
| llvm::BasicBlock *getInvokeDest() { return InvokeDest; } |
| void setInvokeDest(llvm::BasicBlock *B) { InvokeDest = B; } |
| |
| llvm::LLVMContext &getLLVMContext() { return VMContext; } |
| |
| //===--------------------------------------------------------------------===// |
| // Objective-C |
| //===--------------------------------------------------------------------===// |
| |
| void GenerateObjCMethod(const ObjCMethodDecl *OMD); |
| |
| void StartObjCMethod(const ObjCMethodDecl *MD, |
| const ObjCContainerDecl *CD); |
| |
| /// GenerateObjCGetter - Synthesize an Objective-C property getter function. |
| void GenerateObjCGetter(ObjCImplementationDecl *IMP, |
| const ObjCPropertyImplDecl *PID); |
| |
| /// GenerateObjCSetter - Synthesize an Objective-C property setter function |
| /// for the given property. |
| void GenerateObjCSetter(ObjCImplementationDecl *IMP, |
| const ObjCPropertyImplDecl *PID); |
| |
| //===--------------------------------------------------------------------===// |
| // Block Bits |
| //===--------------------------------------------------------------------===// |
| |
| llvm::Value *BuildBlockLiteralTmp(const BlockExpr *); |
| llvm::Constant *BuildDescriptorBlockDecl(bool BlockHasCopyDispose, |
| uint64_t Size, |
| const llvm::StructType *, |
| std::vector<HelperInfo> *); |
| |
| llvm::Function *GenerateBlockFunction(const BlockExpr *BExpr, |
| const BlockInfo& Info, |
| const Decl *OuterFuncDecl, |
| llvm::DenseMap<const Decl*, llvm::Value*> ldm, |
| uint64_t &Size, uint64_t &Align, |
| llvm::SmallVector<const Expr *, 8> &subBlockDeclRefDecls, |
| bool &subBlockHasCopyDispose); |
| |
| void BlockForwardSelf(); |
| llvm::Value *LoadBlockStruct(); |
| |
| llvm::Value *GetAddrOfBlockDecl(const BlockDeclRefExpr *E); |
| const llvm::Type *BuildByRefType(const ValueDecl *D); |
| |
| void GenerateCode(const FunctionDecl *FD, |
| llvm::Function *Fn); |
| void StartFunction(const Decl *D, QualType RetTy, |
| llvm::Function *Fn, |
| const FunctionArgList &Args, |
| SourceLocation StartLoc); |
| |
| /// EmitReturnBlock - Emit the unified return block, trying to avoid its |
| /// emission when possible. |
| void EmitReturnBlock(); |
| |
| /// FinishFunction - Complete IR generation of the current function. It is |
| /// legal to call this function even if there is no current insertion point. |
| void FinishFunction(SourceLocation EndLoc=SourceLocation()); |
| |
| /// GenerateVtable - Generate the vtable for the given type. |
| llvm::Value *GenerateVtable(const CXXRecordDecl *RD); |
| |
| /// GenerateThunk - Generate a thunk for the given method |
| llvm::Constant *GenerateThunk(llvm::Function *Fn, const CXXMethodDecl *MD, |
| bool Extern, int64_t nv, int64_t v); |
| |
| void EmitCtorPrologue(const CXXConstructorDecl *CD); |
| |
| void SynthesizeCXXCopyConstructor(const CXXConstructorDecl *CD, |
| const FunctionDecl *FD, |
| llvm::Function *Fn, |
| const FunctionArgList &Args); |
| |
| void SynthesizeCXXCopyAssignment(const CXXMethodDecl *CD, |
| const FunctionDecl *FD, |
| llvm::Function *Fn, |
| const FunctionArgList &Args); |
| |
| void SynthesizeDefaultConstructor(const CXXConstructorDecl *CD, |
| const FunctionDecl *FD, |
| llvm::Function *Fn, |
| const FunctionArgList &Args); |
| |
| void SynthesizeDefaultDestructor(const CXXDestructorDecl *CD, |
| const FunctionDecl *FD, |
| llvm::Function *Fn, |
| const FunctionArgList &Args); |
| |
| /// EmitDtorEpilogue - Emit all code that comes at the end of class's |
| /// destructor. This is to call destructors on members and base classes |
| /// in reverse order of their construction. |
| void EmitDtorEpilogue(const CXXDestructorDecl *DD); |
| |
| /// EmitFunctionProlog - Emit the target specific LLVM code to load the |
| /// arguments for the given function. This is also responsible for naming the |
| /// LLVM function arguments. |
| void EmitFunctionProlog(const CGFunctionInfo &FI, |
| llvm::Function *Fn, |
| const FunctionArgList &Args); |
| |
| /// EmitFunctionEpilog - Emit the target specific LLVM code to return the |
| /// given temporary. |
| void EmitFunctionEpilog(const CGFunctionInfo &FI, llvm::Value *ReturnValue); |
| |
| const llvm::Type *ConvertTypeForMem(QualType T); |
| const llvm::Type *ConvertType(QualType T); |
| |
| /// LoadObjCSelf - Load the value of self. This function is only valid while |
| /// generating code for an Objective-C method. |
| llvm::Value *LoadObjCSelf(); |
| |
| /// TypeOfSelfObject - Return type of object that this self represents. |
| QualType TypeOfSelfObject(); |
| |
| /// hasAggregateLLVMType - Return true if the specified AST type will map into |
| /// an aggregate LLVM type or is void. |
| static bool hasAggregateLLVMType(QualType T); |
| |
| /// createBasicBlock - Create an LLVM basic block. |
| llvm::BasicBlock *createBasicBlock(const char *Name="", |
| llvm::Function *Parent=0, |
| llvm::BasicBlock *InsertBefore=0) { |
| #ifdef NDEBUG |
| return llvm::BasicBlock::Create(VMContext, "", Parent, InsertBefore); |
| #else |
| return llvm::BasicBlock::Create(VMContext, Name, Parent, InsertBefore); |
| #endif |
| } |
| |
| /// getBasicBlockForLabel - Return the LLVM basicblock that the specified |
| /// label maps to. |
| llvm::BasicBlock *getBasicBlockForLabel(const LabelStmt *S); |
| |
| /// SimplifyForwardingBlocks - If the given basic block is only a |
| /// branch to another basic block, simplify it. This assumes that no |
| /// other code could potentially reference the basic block. |
| void SimplifyForwardingBlocks(llvm::BasicBlock *BB); |
| |
| /// EmitBlock - Emit the given block \arg BB and set it as the insert point, |
| /// adding a fall-through branch from the current insert block if |
| /// necessary. It is legal to call this function even if there is no current |
| /// insertion point. |
| /// |
| /// IsFinished - If true, indicates that the caller has finished emitting |
| /// branches to the given block and does not expect to emit code into it. This |
| /// means the block can be ignored if it is unreachable. |
| void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false); |
| |
| /// EmitBranch - Emit a branch to the specified basic block from the current |
| /// insert block, taking care to avoid creation of branches from dummy |
| /// blocks. It is legal to call this function even if there is no current |
| /// insertion point. |
| /// |
| /// This function clears the current insertion point. The caller should follow |
| /// calls to this function with calls to Emit*Block prior to generation new |
| /// code. |
| void EmitBranch(llvm::BasicBlock *Block); |
| |
| /// HaveInsertPoint - True if an insertion point is defined. If not, this |
| /// indicates that the current code being emitted is unreachable. |
| bool HaveInsertPoint() const { |
| return Builder.GetInsertBlock() != 0; |
| } |
| |
| /// EnsureInsertPoint - Ensure that an insertion point is defined so that |
| /// emitted IR has a place to go. Note that by definition, if this function |
| /// creates a block then that block is unreachable; callers may do better to |
| /// detect when no insertion point is defined and simply skip IR generation. |
| void EnsureInsertPoint() { |
| if (!HaveInsertPoint()) |
| EmitBlock(createBasicBlock()); |
| } |
| |
| /// ErrorUnsupported - Print out an error that codegen doesn't support the |
| /// specified stmt yet. |
| void ErrorUnsupported(const Stmt *S, const char *Type, |
| bool OmitOnError=false); |
| |
| //===--------------------------------------------------------------------===// |
| // Helpers |
| //===--------------------------------------------------------------------===// |
| |
| /// CreateTempAlloca - This creates a alloca and inserts it into the entry |
| /// block. |
| llvm::AllocaInst *CreateTempAlloca(const llvm::Type *Ty, |
| const char *Name = "tmp"); |
| |
| /// EvaluateExprAsBool - Perform the usual unary conversions on the specified |
| /// expression and compare the result against zero, returning an Int1Ty value. |
| llvm::Value *EvaluateExprAsBool(const Expr *E); |
| |
| /// EmitAnyExpr - Emit code to compute the specified expression which can have |
| /// any type. The result is returned as an RValue struct. If this is an |
| /// aggregate expression, the aggloc/agglocvolatile arguments indicate where |
| /// the result should be returned. |
| /// |
| /// \param IgnoreResult - True if the resulting value isn't used. |
| RValue EmitAnyExpr(const Expr *E, llvm::Value *AggLoc = 0, |
| bool IsAggLocVolatile = false, bool IgnoreResult = false, |
| bool IsInitializer = false); |
| |
| // EmitVAListRef - Emit a "reference" to a va_list; this is either the address |
| // or the value of the expression, depending on how va_list is defined. |
| llvm::Value *EmitVAListRef(const Expr *E); |
| |
| /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result will |
| /// always be accessible even if no aggregate location is provided. |
| RValue EmitAnyExprToTemp(const Expr *E, bool IsAggLocVolatile = false, |
| bool IsInitializer = false); |
| |
| /// EmitAggregateCopy - Emit an aggrate copy. |
| /// |
| /// \param isVolatile - True iff either the source or the destination is |
| /// volatile. |
| void EmitAggregateCopy(llvm::Value *DestPtr, llvm::Value *SrcPtr, |
| QualType EltTy, bool isVolatile=false); |
| |
| void EmitAggregateClear(llvm::Value *DestPtr, QualType Ty); |
| |
| /// StartBlock - Start new block named N. If insert block is a dummy block |
| /// then reuse it. |
| void StartBlock(const char *N); |
| |
| /// GetAddrOfStaticLocalVar - Return the address of a static local variable. |
| llvm::Constant *GetAddrOfStaticLocalVar(const VarDecl *BVD); |
| |
| /// GetAddrOfLocalVar - Return the address of a local variable. |
| llvm::Value *GetAddrOfLocalVar(const VarDecl *VD); |
| |
| /// getAccessedFieldNo - Given an encoded value and a result number, return |
| /// the input field number being accessed. |
| static unsigned getAccessedFieldNo(unsigned Idx, const llvm::Constant *Elts); |
| |
| unsigned GetIDForAddrOfLabel(const LabelStmt *L); |
| |
| /// EmitMemSetToZero - Generate code to memset a value of the given type to 0. |
| void EmitMemSetToZero(llvm::Value *DestPtr, QualType Ty); |
| |
| // EmitVAArg - Generate code to get an argument from the passed in pointer |
| // and update it accordingly. The return value is a pointer to the argument. |
| // FIXME: We should be able to get rid of this method and use the va_arg |
| // instruction in LLVM instead once it works well enough. |
| llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty); |
| |
| // EmitVLASize - Generate code for any VLA size expressions that might occur |
| // in a variably modified type. If Ty is a VLA, will return the value that |
| // corresponds to the size in bytes of the VLA type. Will return 0 otherwise. |
| /// |
| /// This function can be called with a null (unreachable) insert point. |
| llvm::Value *EmitVLASize(QualType Ty); |
| |
| // GetVLASize - Returns an LLVM value that corresponds to the size in bytes |
| // of a variable length array type. |
| llvm::Value *GetVLASize(const VariableArrayType *); |
| |
| /// LoadCXXThis - Load the value of 'this'. This function is only valid while |
| /// generating code for an C++ member function. |
| llvm::Value *LoadCXXThis(); |
| |
| /// AddressCXXOfBaseClass - This function will add the necessary delta |
| /// to the load of 'this' and returns address of the base class. |
| // FIXME. This currently only does a derived to non-virtual base conversion. |
| // Other kinds of conversions will come later. |
| llvm::Value *AddressCXXOfBaseClass(llvm::Value *ThisValue, |
| const CXXRecordDecl *ClassDecl, |
| const CXXRecordDecl *BaseClassDecl); |
| |
| void EmitClassAggrMemberwiseCopy(llvm::Value *DestValue, |
| llvm::Value *SrcValue, |
| const ArrayType *Array, |
| const CXXRecordDecl *BaseClassDecl, |
| QualType Ty); |
| |
| void EmitClassAggrCopyAssignment(llvm::Value *DestValue, |
| llvm::Value *SrcValue, |
| const ArrayType *Array, |
| const CXXRecordDecl *BaseClassDecl, |
| QualType Ty); |
| |
| void EmitClassMemberwiseCopy(llvm::Value *DestValue, llvm::Value *SrcValue, |
| const CXXRecordDecl *ClassDecl, |
| const CXXRecordDecl *BaseClassDecl, |
| QualType Ty); |
| |
| void EmitClassCopyAssignment(llvm::Value *DestValue, llvm::Value *SrcValue, |
| const CXXRecordDecl *ClassDecl, |
| const CXXRecordDecl *BaseClassDecl, |
| QualType Ty); |
| |
| void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type, |
| llvm::Value *This, |
| CallExpr::const_arg_iterator ArgBeg, |
| CallExpr::const_arg_iterator ArgEnd); |
| |
| void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D, |
| const ArrayType *Array, |
| llvm::Value *This); |
| |
| void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D, |
| const ArrayType *Array, |
| llvm::Value *This); |
| |
| void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type, |
| llvm::Value *This); |
| |
| void PushCXXTemporary(const CXXTemporary *Temporary, llvm::Value *Ptr); |
| void PopCXXTemporary(); |
| |
| llvm::Value *EmitCXXNewExpr(const CXXNewExpr *E); |
| void EmitCXXDeleteExpr(const CXXDeleteExpr *E); |
| |
| //===--------------------------------------------------------------------===// |
| // Declaration Emission |
| //===--------------------------------------------------------------------===// |
| |
| /// EmitDecl - Emit a declaration. |
| /// |
| /// This function can be called with a null (unreachable) insert point. |
| void EmitDecl(const Decl &D); |
| |
| /// EmitBlockVarDecl - Emit a block variable declaration. |
| /// |
| /// This function can be called with a null (unreachable) insert point. |
| void EmitBlockVarDecl(const VarDecl &D); |
| |
| /// EmitLocalBlockVarDecl - Emit a local block variable declaration. |
| /// |
| /// This function can be called with a null (unreachable) insert point. |
| void EmitLocalBlockVarDecl(const VarDecl &D); |
| |
| void EmitStaticBlockVarDecl(const VarDecl &D); |
| |
| /// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl. |
| void EmitParmDecl(const VarDecl &D, llvm::Value *Arg); |
| |
| //===--------------------------------------------------------------------===// |
| // Statement Emission |
| //===--------------------------------------------------------------------===// |
| |
| /// EmitStopPoint - Emit a debug stoppoint if we are emitting debug info. |
| void EmitStopPoint(const Stmt *S); |
| |
| /// EmitStmt - Emit the code for the statement \arg S. It is legal to call |
| /// this function even if there is no current insertion point. |
| /// |
| /// This function may clear the current insertion point; callers should use |
| /// EnsureInsertPoint if they wish to subsequently generate code without first |
| /// calling EmitBlock, EmitBranch, or EmitStmt. |
| void EmitStmt(const Stmt *S); |
| |
| /// EmitSimpleStmt - Try to emit a "simple" statement which does not |
| /// necessarily require an insertion point or debug information; typically |
| /// because the statement amounts to a jump or a container of other |
| /// statements. |
| /// |
| /// \return True if the statement was handled. |
| bool EmitSimpleStmt(const Stmt *S); |
| |
| RValue EmitCompoundStmt(const CompoundStmt &S, bool GetLast = false, |
| llvm::Value *AggLoc = 0, bool isAggVol = false); |
| |
| /// EmitLabel - Emit the block for the given label. It is legal to call this |
| /// function even if there is no current insertion point. |
| void EmitLabel(const LabelStmt &S); // helper for EmitLabelStmt. |
| |
| void EmitLabelStmt(const LabelStmt &S); |
| void EmitGotoStmt(const GotoStmt &S); |
| void EmitIndirectGotoStmt(const IndirectGotoStmt &S); |
| void EmitIfStmt(const IfStmt &S); |
| void EmitWhileStmt(const WhileStmt &S); |
| void EmitDoStmt(const DoStmt &S); |
| void EmitForStmt(const ForStmt &S); |
| void EmitReturnStmt(const ReturnStmt &S); |
| void EmitDeclStmt(const DeclStmt &S); |
| void EmitBreakStmt(const BreakStmt &S); |
| void EmitContinueStmt(const ContinueStmt &S); |
| void EmitSwitchStmt(const SwitchStmt &S); |
| void EmitDefaultStmt(const DefaultStmt &S); |
| void EmitCaseStmt(const CaseStmt &S); |
| void EmitCaseStmtRange(const CaseStmt &S); |
| void EmitAsmStmt(const AsmStmt &S); |
| |
| void EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S); |
| void EmitObjCAtTryStmt(const ObjCAtTryStmt &S); |
| void EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S); |
| void EmitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt &S); |
| |
| //===--------------------------------------------------------------------===// |
| // LValue Expression Emission |
| //===--------------------------------------------------------------------===// |
| |
| /// GetUndefRValue - Get an appropriate 'undef' rvalue for the given type. |
| RValue GetUndefRValue(QualType Ty); |
| |
| /// EmitUnsupportedRValue - Emit a dummy r-value using the type of E |
| /// and issue an ErrorUnsupported style diagnostic (using the |
| /// provided Name). |
| RValue EmitUnsupportedRValue(const Expr *E, |
| const char *Name); |
| |
| /// EmitUnsupportedLValue - Emit a dummy l-value using the type of E and issue |
| /// an ErrorUnsupported style diagnostic (using the provided Name). |
| LValue EmitUnsupportedLValue(const Expr *E, |
| const char *Name); |
| |
| /// EmitLValue - Emit code to compute a designator that specifies the location |
| /// of the expression. |
| /// |
| /// This can return one of two things: a simple address or a bitfield |
| /// reference. In either case, the LLVM Value* in the LValue structure is |
| /// guaranteed to be an LLVM pointer type. |
| /// |
| /// If this returns a bitfield reference, nothing about the pointee type of |
| /// the LLVM value is known: For example, it may not be a pointer to an |
| /// integer. |
| /// |
| /// If this returns a normal address, and if the lvalue's C type is fixed |
| /// size, this method guarantees that the returned pointer type will point to |
| /// an LLVM type of the same size of the lvalue's type. If the lvalue has a |
| /// variable length type, this is not possible. |
| /// |
| LValue EmitLValue(const Expr *E); |
| |
| /// EmitLoadOfScalar - Load a scalar value from an address, taking |
| /// care to appropriately convert from the memory representation to |
| /// the LLVM value representation. |
| llvm::Value *EmitLoadOfScalar(llvm::Value *Addr, bool Volatile, |
| QualType Ty); |
| |
| /// EmitStoreOfScalar - Store a scalar value to an address, taking |
| /// care to appropriately convert from the memory representation to |
| /// the LLVM value representation. |
| void EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr, |
| bool Volatile, QualType Ty); |
| |
| /// EmitLoadOfLValue - Given an expression that represents a value lvalue, |
| /// this method emits the address of the lvalue, then loads the result as an |
| /// rvalue, returning the rvalue. |
| RValue EmitLoadOfLValue(LValue V, QualType LVType); |
| RValue EmitLoadOfExtVectorElementLValue(LValue V, QualType LVType); |
| RValue EmitLoadOfBitfieldLValue(LValue LV, QualType ExprType); |
| RValue EmitLoadOfPropertyRefLValue(LValue LV, QualType ExprType); |
| RValue EmitLoadOfKVCRefLValue(LValue LV, QualType ExprType); |
| |
| |
| /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| /// lvalue, where both are guaranteed to the have the same type, and that type |
| /// is 'Ty'. |
| void EmitStoreThroughLValue(RValue Src, LValue Dst, QualType Ty); |
| void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst, |
| QualType Ty); |
| void EmitStoreThroughPropertyRefLValue(RValue Src, LValue Dst, QualType Ty); |
| void EmitStoreThroughKVCRefLValue(RValue Src, LValue Dst, QualType Ty); |
| |
| /// EmitStoreThroughLValue - Store Src into Dst with same constraints as |
| /// EmitStoreThroughLValue. |
| /// |
| /// \param Result [out] - If non-null, this will be set to a Value* for the |
| /// bit-field contents after the store, appropriate for use as the result of |
| /// an assignment to the bit-field. |
| void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, QualType Ty, |
| llvm::Value **Result=0); |
| |
| // Note: only availabe for agg return types |
| LValue EmitBinaryOperatorLValue(const BinaryOperator *E); |
| // Note: only available for agg return types |
| LValue EmitCallExprLValue(const CallExpr *E); |
| // Note: only available for agg return types |
| LValue EmitVAArgExprLValue(const VAArgExpr *E); |
| LValue EmitDeclRefLValue(const DeclRefExpr *E); |
| LValue EmitStringLiteralLValue(const StringLiteral *E); |
| LValue EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E); |
| LValue EmitPredefinedFunctionName(unsigned Type); |
| LValue EmitPredefinedLValue(const PredefinedExpr *E); |
| LValue EmitUnaryOpLValue(const UnaryOperator *E); |
| LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E); |
| LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E); |
| LValue EmitMemberExpr(const MemberExpr *E); |
| LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E); |
| LValue EmitConditionalOperator(const ConditionalOperator *E); |
| LValue EmitCastLValue(const CastExpr *E); |
| |
| llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface, |
| const ObjCIvarDecl *Ivar); |
| LValue EmitLValueForField(llvm::Value* Base, FieldDecl* Field, |
| bool isUnion, unsigned CVRQualifiers); |
| LValue EmitLValueForIvar(QualType ObjectTy, |
| llvm::Value* Base, const ObjCIvarDecl *Ivar, |
| unsigned CVRQualifiers); |
| |
| LValue EmitLValueForBitfield(llvm::Value* Base, FieldDecl* Field, |
| unsigned CVRQualifiers); |
| |
| LValue EmitBlockDeclRefLValue(const BlockDeclRefExpr *E); |
| |
| LValue EmitCXXConditionDeclLValue(const CXXConditionDeclExpr *E); |
| LValue EmitCXXConstructLValue(const CXXConstructExpr *E); |
| LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E); |
| |
| LValue EmitObjCMessageExprLValue(const ObjCMessageExpr *E); |
| LValue EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E); |
| LValue EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E); |
| LValue EmitObjCKVCRefLValue(const ObjCImplicitSetterGetterRefExpr *E); |
| LValue EmitObjCSuperExprLValue(const ObjCSuperExpr *E); |
| LValue EmitStmtExprLValue(const StmtExpr *E); |
| |
| //===--------------------------------------------------------------------===// |
| // Scalar Expression Emission |
| //===--------------------------------------------------------------------===// |
| |
| /// EmitCall - Generate a call of the given function, expecting the given |
| /// result type, and using the given argument list which specifies both the |
| /// LLVM arguments and the types they were derived from. |
| /// |
| /// \param TargetDecl - If given, the decl of the function in a |
| /// direct call; used to set attributes on the call (noreturn, |
| /// etc.). |
| RValue EmitCall(const CGFunctionInfo &FnInfo, |
| llvm::Value *Callee, |
| const CallArgList &Args, |
| const Decl *TargetDecl = 0); |
| |
| RValue EmitCall(llvm::Value *Callee, QualType FnType, |
| CallExpr::const_arg_iterator ArgBeg, |
| CallExpr::const_arg_iterator ArgEnd, |
| const Decl *TargetDecl = 0); |
| RValue EmitCallExpr(const CallExpr *E); |
| |
| llvm::Value *BuildVirtualCall(const CXXMethodDecl *MD, llvm::Value *&This, |
| const llvm::Type *Ty); |
| RValue EmitCXXMemberCall(const CXXMethodDecl *MD, |
| llvm::Value *Callee, |
| llvm::Value *This, |
| CallExpr::const_arg_iterator ArgBeg, |
| CallExpr::const_arg_iterator ArgEnd); |
| RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E); |
| |
| RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E, |
| const CXXMethodDecl *MD); |
| |
| RValue EmitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *E); |
| |
| RValue EmitBuiltinExpr(const FunctionDecl *FD, |
| unsigned BuiltinID, const CallExpr *E); |
| |
| RValue EmitBlockCallExpr(const CallExpr *E); |
| |
| /// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the call |
| /// is unhandled by the current target. |
| llvm::Value *EmitTargetBuiltinExpr(unsigned BuiltinID, const CallExpr *E); |
| |
| llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E); |
| llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E); |
| |
| llvm::Value *EmitShuffleVector(llvm::Value* V1, llvm::Value *V2, ...); |
| llvm::Value *EmitVector(llvm::Value * const *Vals, unsigned NumVals, |
| bool isSplat = false); |
| |
| llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E); |
| llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E); |
| llvm::Value *EmitObjCSelectorExpr(const ObjCSelectorExpr *E); |
| RValue EmitObjCMessageExpr(const ObjCMessageExpr *E); |
| RValue EmitObjCPropertyGet(const Expr *E); |
| RValue EmitObjCSuperPropertyGet(const Expr *Exp, const Selector &S); |
| void EmitObjCPropertySet(const Expr *E, RValue Src); |
| void EmitObjCSuperPropertySet(const Expr *E, const Selector &S, RValue Src); |
| |
| |
| /// EmitReferenceBindingToExpr - Emits a reference binding to the passed in |
| /// expression. Will emit a temporary variable if E is not an LValue. |
| RValue EmitReferenceBindingToExpr(const Expr* E, QualType DestType, |
| bool IsInitializer = false); |
| |
| //===--------------------------------------------------------------------===// |
| // Expression Emission |
| //===--------------------------------------------------------------------===// |
| |
| // Expressions are broken into three classes: scalar, complex, aggregate. |
| |
| /// EmitScalarExpr - Emit the computation of the specified expression of LLVM |
| /// scalar type, returning the result. |
| llvm::Value *EmitScalarExpr(const Expr *E , bool IgnoreResultAssign = false); |
| |
| /// EmitScalarConversion - Emit a conversion from the specified type to the |
| /// specified destination type, both of which are LLVM scalar types. |
| llvm::Value *EmitScalarConversion(llvm::Value *Src, QualType SrcTy, |
| QualType DstTy); |
| |
| /// EmitComplexToScalarConversion - Emit a conversion from the specified |
| /// complex type to the specified destination type, where the destination type |
| /// is an LLVM scalar type. |
| llvm::Value *EmitComplexToScalarConversion(ComplexPairTy Src, QualType SrcTy, |
| QualType DstTy); |
| |
| |
| /// EmitAggExpr - Emit the computation of the specified expression of |
| /// aggregate type. The result is computed into DestPtr. Note that if |
| /// DestPtr is null, the value of the aggregate expression is not needed. |
| void EmitAggExpr(const Expr *E, llvm::Value *DestPtr, bool VolatileDest, |
| bool IgnoreResult = false, bool IsInitializer = false, |
| bool RequiresGCollection = false); |
| |
| /// EmitGCMemmoveCollectable - Emit special API for structs with object |
| /// pointers. |
| void EmitGCMemmoveCollectable(llvm::Value *DestPtr, llvm::Value *SrcPtr, |
| QualType Ty); |
| |
| /// EmitComplexExpr - Emit the computation of the specified expression of |
| /// complex type, returning the result. |
| ComplexPairTy EmitComplexExpr(const Expr *E, bool IgnoreReal = false, |
| bool IgnoreImag = false, |
| bool IgnoreRealAssign = false, |
| bool IgnoreImagAssign = false); |
| |
| /// EmitComplexExprIntoAddr - Emit the computation of the specified expression |
| /// of complex type, storing into the specified Value*. |
| void EmitComplexExprIntoAddr(const Expr *E, llvm::Value *DestAddr, |
| bool DestIsVolatile); |
| |
| /// StoreComplexToAddr - Store a complex number into the specified address. |
| void StoreComplexToAddr(ComplexPairTy V, llvm::Value *DestAddr, |
| bool DestIsVolatile); |
| /// LoadComplexFromAddr - Load a complex number from the specified address. |
| ComplexPairTy LoadComplexFromAddr(llvm::Value *SrcAddr, bool SrcIsVolatile); |
| |
| /// CreateStaticBlockVarDecl - Create a zero-initialized LLVM global |
| /// for a static block var decl. |
| llvm::GlobalVariable * CreateStaticBlockVarDecl(const VarDecl &D, |
| const char *Separator, |
| llvm::GlobalValue::LinkageTypes |
| Linkage); |
| |
| /// EmitStaticCXXBlockVarDeclInit - Create the initializer for a C++ |
| /// runtime initialized static block var decl. |
| void EmitStaticCXXBlockVarDeclInit(const VarDecl &D, |
| llvm::GlobalVariable *GV); |
| |
| /// EmitCXXGlobalVarDeclInit - Create the initializer for a C++ |
| /// variable with global storage. |
| void EmitCXXGlobalVarDeclInit(const VarDecl &D, llvm::Constant *DeclPtr); |
| |
| /// EmitCXXGlobalDtorRegistration - Emits a call to register the global ptr |
| /// with the C++ runtime so that its destructor will be called at exit. |
| void EmitCXXGlobalDtorRegistration(const CXXDestructorDecl *Dtor, |
| llvm::Constant *DeclPtr); |
| |
| /// GenerateCXXGlobalInitFunc - Generates code for initializing global |
| /// variables. |
| void GenerateCXXGlobalInitFunc(llvm::Function *Fn, |
| const VarDecl **Decls, |
| unsigned NumDecls); |
| |
| void EmitCXXConstructExpr(llvm::Value *Dest, const CXXConstructExpr *E); |
| |
| RValue EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E, |
| llvm::Value *AggLoc = 0, |
| bool IsAggLocVolatile = false, |
| bool IsInitializer = false); |
| |
| //===--------------------------------------------------------------------===// |
| // Internal Helpers |
| //===--------------------------------------------------------------------===// |
| |
| /// ContainsLabel - Return true if the statement contains a label in it. If |
| /// this statement is not executed normally, it not containing a label means |
| /// that we can just remove the code. |
| static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false); |
| |
| /// ConstantFoldsToSimpleInteger - If the specified expression does not fold |
| /// to a constant, or if it does but contains a label, return 0. If it |
| /// constant folds to 'true' and does not contain a label, return 1, if it |
| /// constant folds to 'false' and does not contain a label, return -1. |
| int ConstantFoldsToSimpleInteger(const Expr *Cond); |
| |
| /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an |
| /// if statement) to the specified blocks. Based on the condition, this might |
| /// try to simplify the codegen of the conditional based on the branch. |
| void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock, |
| llvm::BasicBlock *FalseBlock); |
| private: |
| |
| /// EmitIndirectSwitches - Emit code for all of the switch |
| /// instructions in IndirectSwitches. |
| void EmitIndirectSwitches(); |
| |
| void EmitReturnOfRValue(RValue RV, QualType Ty); |
| |
| /// ExpandTypeFromArgs - Reconstruct a structure of type \arg Ty |
| /// from function arguments into \arg Dst. See ABIArgInfo::Expand. |
| /// |
| /// \param AI - The first function argument of the expansion. |
| /// \return The argument following the last expanded function |
| /// argument. |
| llvm::Function::arg_iterator |
| ExpandTypeFromArgs(QualType Ty, LValue Dst, |
| llvm::Function::arg_iterator AI); |
| |
| /// ExpandTypeToArgs - Expand an RValue \arg Src, with the LLVM type for \arg |
| /// Ty, into individual arguments on the provided vector \arg Args. See |
| /// ABIArgInfo::Expand. |
| void ExpandTypeToArgs(QualType Ty, RValue Src, |
| llvm::SmallVector<llvm::Value*, 16> &Args); |
| |
| llvm::Value* EmitAsmInput(const AsmStmt &S, |
| const TargetInfo::ConstraintInfo &Info, |
| const Expr *InputExpr, std::string &ConstraintStr); |
| |
| /// EmitCleanupBlock - emits a single cleanup block. |
| void EmitCleanupBlock(); |
| |
| /// AddBranchFixup - adds a branch instruction to the list of fixups for the |
| /// current cleanup scope. |
| void AddBranchFixup(llvm::BranchInst *BI); |
| |
| /// EmitCallArg - Emit a single call argument. |
| RValue EmitCallArg(const Expr *E, QualType ArgType); |
| |
| /// EmitCallArgs - Emit call arguments for a function. |
| /// The CallArgTypeInfo parameter is used for iterating over the known |
| /// argument types of the function being called. |
| template<typename T> |
| void EmitCallArgs(CallArgList& Args, const T* CallArgTypeInfo, |
| CallExpr::const_arg_iterator ArgBeg, |
| CallExpr::const_arg_iterator ArgEnd) { |
| CallExpr::const_arg_iterator Arg = ArgBeg; |
| |
| // First, use the argument types that the type info knows about |
| if (CallArgTypeInfo) { |
| for (typename T::arg_type_iterator I = CallArgTypeInfo->arg_type_begin(), |
| E = CallArgTypeInfo->arg_type_end(); I != E; ++I, ++Arg) { |
| QualType ArgType = *I; |
| |
| assert(getContext().getCanonicalType(ArgType.getNonReferenceType()). |
| getTypePtr() == |
| getContext().getCanonicalType(Arg->getType()).getTypePtr() && |
| "type mismatch in call argument!"); |
| |
| Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType), |
| ArgType)); |
| } |
| |
| // Either we've emitted all the call args, or we have a call to a |
| // variadic function. |
| assert((Arg == ArgEnd || CallArgTypeInfo->isVariadic()) && |
| "Extra arguments in non-variadic function!"); |
| |
| } |
| |
| // If we still have any arguments, emit them using the type of the argument. |
| for (; Arg != ArgEnd; ++Arg) { |
| QualType ArgType = Arg->getType(); |
| Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType), |
| ArgType)); |
| } |
| } |
| }; |
| |
| |
| } // end namespace CodeGen |
| } // end namespace clang |
| |
| #endif |