Check in LLVM r95781.
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
new file mode 100644
index 0000000..0e601e5
--- /dev/null
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -0,0 +1,1327 @@
+//===-- 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/AST/CharUnits.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 Twine;
+ class Value;
+}
+
+namespace clang {
+ class ASTContext;
+ class CXXDestructorDecl;
+ class CXXTryStmt;
+ 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.
+ const 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;
+
+ /// CurGD - The GlobalDecl for the current function being compiled.
+ GlobalDecl CurGD;
+ /// OuterTryBlock - This is the address of the outter most try block, 0
+ /// otherwise.
+ const Stmt *OuterTryBlock;
+
+ /// 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::Value *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;
+
+ bool Exceptions;
+ bool CatchUndefined;
+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 *CleanupEntryBlock,
+ llvm::BasicBlock *CleanupExitBlock,
+ llvm::BasicBlock *PreviousInvokeDest,
+ bool EHOnly = false);
+ void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock) {
+ PushCleanupBlock(CleanupEntryBlock, 0, getInvokeDest(), false);
+ }
+
+ /// CleanupBlockInfo - A struct representing a popped cleanup block.
+ struct CleanupBlockInfo {
+ /// CleanupEntryBlock - the cleanup entry 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;
+
+ /// EHOnly - True iff this cleanup should only be performed on the
+ /// exceptional edge.
+ bool EHOnly;
+
+ CleanupBlockInfo(llvm::BasicBlock *cb, llvm::BasicBlock *sb,
+ llvm::BasicBlock *eb, bool ehonly = false)
+ : CleanupBlock(cb), SwitchBlock(sb), EndBlock(eb), EHOnly(ehonly) {}
+ };
+
+ /// EHCleanupBlock - RAII object that will create a cleanup block for the
+ /// exceptional edge and set the insert point to that block. When destroyed,
+ /// it creates the cleanup edge and sets the insert point to the previous
+ /// block.
+ class EHCleanupBlock {
+ CodeGenFunction& CGF;
+ llvm::BasicBlock *Cont;
+ llvm::BasicBlock *CleanupHandler;
+ llvm::BasicBlock *CleanupEntryBB;
+ llvm::BasicBlock *PreviousInvokeDest;
+ public:
+ EHCleanupBlock(CodeGenFunction &cgf)
+ : CGF(cgf), Cont(CGF.createBasicBlock("cont")),
+ CleanupHandler(CGF.createBasicBlock("ehcleanup")),
+ CleanupEntryBB(CGF.createBasicBlock("ehcleanup.rest")),
+ PreviousInvokeDest(CGF.getInvokeDest()) {
+ CGF.EmitBranch(Cont);
+ llvm::BasicBlock *TerminateHandler = CGF.getTerminateHandler();
+ CGF.Builder.SetInsertPoint(CleanupEntryBB);
+ CGF.setInvokeDest(TerminateHandler);
+ }
+ ~EHCleanupBlock();
+ };
+
+ /// 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. This will also reset the invoke handler to the previous value
+ /// from when the cleanup block was created.
+ CleanupBlockInfo PopCleanupBlock();
+
+ /// DelayedCleanupBlock - 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 DelayedCleanupBlock {
+ CodeGenFunction& CGF;
+ llvm::BasicBlock *CurBB;
+ llvm::BasicBlock *CleanupEntryBB;
+ llvm::BasicBlock *CleanupExitBB;
+ llvm::BasicBlock *CurInvokeDest;
+ bool EHOnly;
+
+ public:
+ DelayedCleanupBlock(CodeGenFunction &cgf, bool ehonly = false)
+ : CGF(cgf), CurBB(CGF.Builder.GetInsertBlock()),
+ CleanupEntryBB(CGF.createBasicBlock("cleanup")), CleanupExitBB(0),
+ CurInvokeDest(CGF.getInvokeDest()),
+ EHOnly(ehonly) {
+ CGF.Builder.SetInsertPoint(CleanupEntryBB);
+ }
+
+ llvm::BasicBlock *getCleanupExitBlock() {
+ if (!CleanupExitBB)
+ CleanupExitBB = CGF.createBasicBlock("cleanup.exit");
+ return CleanupExitBB;
+ }
+
+ ~DelayedCleanupBlock() {
+ CGF.PushCleanupBlock(CleanupEntryBB, CleanupExitBB, CurInvokeDest,
+ EHOnly);
+ // FIXME: This is silly, move this into the builder.
+ if (CurBB)
+ CGF.Builder.SetInsertPoint(CurBB);
+ else
+ CGF.Builder.ClearInsertionPoint();
+ }
+ };
+
+ /// \brief Enters a new scope for capturing cleanups, all of which will be
+ /// executed once the scope is exited.
+ class CleanupScope {
+ CodeGenFunction& CGF;
+ size_t CleanupStackDepth;
+ bool OldDidCallStackSave;
+ bool PerformCleanup;
+
+ CleanupScope(const CleanupScope &); // DO NOT IMPLEMENT
+ CleanupScope &operator=(const CleanupScope &); // DO NOT IMPLEMENT
+
+ public:
+ /// \brief Enter a new cleanup scope.
+ explicit CleanupScope(CodeGenFunction &CGF)
+ : CGF(CGF), PerformCleanup(true)
+ {
+ CleanupStackDepth = CGF.CleanupEntries.size();
+ OldDidCallStackSave = CGF.DidCallStackSave;
+ }
+
+ /// \brief Exit this cleanup scope, emitting any accumulated
+ /// cleanups.
+ ~CleanupScope() {
+ if (PerformCleanup) {
+ CGF.DidCallStackSave = OldDidCallStackSave;
+ CGF.EmitCleanupBlocks(CleanupStackDepth);
+ }
+ }
+
+ /// \brief Determine whether this scope requires any cleanups.
+ bool requiresCleanups() const {
+ return CGF.CleanupEntries.size() > CleanupStackDepth;
+ }
+
+ /// \brief Force the emission of cleanups now, instead of waiting
+ /// until this object is destroyed.
+ void ForceCleanup() {
+ assert(PerformCleanup && "Already forced cleanup");
+ CGF.DidCallStackSave = OldDidCallStackSave;
+ CGF.EmitCleanupBlocks(CleanupStackDepth);
+ PerformCleanup = false;
+ }
+ };
+
+ /// 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);
+
+ /// BeginConditionalBranch - 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 temporaries created in the conditional
+ /// branch are only destroyed if the branch is taken.
+ void BeginConditionalBranch() {
+ ++ConditionalBranchLevel;
+ }
+
+ /// EndConditionalBranch - Should be called after a conditional part of an
+ /// expression has been emitted.
+ void EndConditionalBranch() {
+ assert(ConditionalBranchLevel != 0 &&
+ "Conditional branch mismatch!");
+
+ --ConditionalBranchLevel;
+ }
+
+private:
+ CGDebugInfo *DebugInfo;
+
+ /// IndirectBranch - The first time an indirect goto is seen we create a block
+ /// with an indirect branch. Every time we see the address of a label taken,
+ /// we add the label to the indirect goto. Every subsequent indirect goto is
+ /// codegen'd as a jump to the IndirectBranch's basic block.
+ llvm::IndirectBrInst *IndirectBranch;
+
+ /// 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 {
+ /// CleanupEntryBlock - The block of code that does the actual cleanup.
+ llvm::BasicBlock *CleanupEntryBlock;
+
+ /// CleanupExitBlock - The cleanup exit block.
+ llvm::BasicBlock *CleanupExitBlock;
+
+ /// 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;
+
+ /// PreviousInvokeDest - The invoke handler from the start of the cleanup
+ /// region.
+ llvm::BasicBlock *PreviousInvokeDest;
+
+ /// EHOnly - Perform this only on the exceptional edge, not the main edge.
+ bool EHOnly;
+
+ explicit CleanupEntry(llvm::BasicBlock *CleanupEntryBlock,
+ llvm::BasicBlock *CleanupExitBlock,
+ llvm::BasicBlock *PreviousInvokeDest,
+ bool ehonly)
+ : CleanupEntryBlock(CleanupEntryBlock),
+ CleanupExitBlock(CleanupExitBlock),
+ PreviousInvokeDest(PreviousInvokeDest),
+ EHOnly(ehonly) {}
+ };
+
+ /// 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 generating code for a C++ member function,
+ /// this will hold the implicit 'this' declaration.
+ ImplicitParamDecl *CXXThisDecl;
+
+ /// CXXVTTDecl - When generating code for a base object constructor or
+ /// base object destructor with virtual bases, this will hold the implicit
+ /// VTT parameter.
+ ImplicitParamDecl *CXXVTTDecl;
+
+ /// 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;
+
+ /// ConditionalBranchLevel - Contains the nesting level of the current
+ /// conditional branch. This is used so that we know if a temporary should be
+ /// destroyed conditionally.
+ unsigned ConditionalBranchLevel;
+
+
+ /// ByrefValueInfoMap - For each __block variable, contains a pair of the LLVM
+ /// type as well as the field number that contains the actual data.
+ llvm::DenseMap<const ValueDecl *, std::pair<const llvm::Type *,
+ unsigned> > ByRefValueInfo;
+
+ /// getByrefValueFieldNumber - Given a declaration, returns the LLVM field
+ /// number that holds the value.
+ unsigned getByRefValueLLVMField(const ValueDecl *VD) const;
+
+ llvm::BasicBlock *TerminateHandler;
+ llvm::BasicBlock *TrapBB;
+
+ int UniqueAggrDestructorCount;
+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,
+ CharUnits 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,
+ CharUnits &Size, CharUnits &Align,
+ llvm::SmallVector<const Expr *, 8> &subBlockDeclRefDecls,
+ bool &subBlockHasCopyDispose);
+
+ void BlockForwardSelf();
+ llvm::Value *LoadBlockStruct();
+
+ CharUnits AllocateBlockDecl(const BlockDeclRefExpr *E);
+ llvm::Value *GetAddrOfBlockDecl(const BlockDeclRefExpr *E);
+ const llvm::Type *BuildByRefType(const ValueDecl *D);
+
+ void GenerateCode(GlobalDecl GD, llvm::Function *Fn);
+ void StartFunction(GlobalDecl GD, 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());
+
+ /// DynamicTypeAdjust - Do the non-virtual and virtual adjustments on an
+ /// object pointer to alter the dynamic type of the pointer. Used by
+ /// GenerateCovariantThunk for building thunks.
+ llvm::Value *DynamicTypeAdjust(llvm::Value *V,
+ const ThunkAdjustment &Adjustment);
+
+ /// GenerateThunk - Generate a thunk for the given method
+ llvm::Constant *GenerateThunk(llvm::Function *Fn, GlobalDecl GD,
+ bool Extern,
+ const ThunkAdjustment &ThisAdjustment);
+ llvm::Constant *
+ GenerateCovariantThunk(llvm::Function *Fn, GlobalDecl GD,
+ bool Extern,
+ const CovariantThunkAdjustment &Adjustment);
+
+ void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type);
+
+ void InitializeVtablePtrs(const CXXRecordDecl *ClassDecl);
+
+ void InitializeVtablePtrsRecursive(const CXXRecordDecl *ClassDecl,
+ llvm::Constant *Vtable,
+ CGVtableInfo::AddrSubMap_t& AddressPoints,
+ llvm::Value *ThisPtr,
+ uint64_t Offset);
+
+ void SynthesizeCXXCopyConstructor(const CXXConstructorDecl *Ctor,
+ CXXCtorType Type,
+ llvm::Function *Fn,
+ const FunctionArgList &Args);
+
+ void SynthesizeCXXCopyAssignment(const CXXMethodDecl *CD,
+ llvm::Function *Fn,
+ const FunctionArgList &Args);
+
+ void SynthesizeDefaultConstructor(const CXXConstructorDecl *Ctor,
+ CXXCtorType Type,
+ llvm::Function *Fn,
+ const FunctionArgList &Args);
+
+ void SynthesizeDefaultDestructor(const CXXDestructorDecl *Dtor,
+ CXXDtorType Type,
+ 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 *Dtor,
+ CXXDtorType Type);
+
+ /// 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);
+
+ /// EmitStartEHSpec - Emit the start of the exception spec.
+ void EmitStartEHSpec(const Decl *D);
+
+ /// EmitEndEHSpec - Emit the end of the exception spec.
+ void EmitEndEHSpec(const Decl *D);
+
+ /// getTerminateHandler - Return a handler that just calls terminate.
+ llvm::BasicBlock *getTerminateHandler();
+
+ 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
+ //===--------------------------------------------------------------------===//
+
+ Qualifiers MakeQualifiers(QualType T) {
+ Qualifiers Quals = getContext().getCanonicalType(T).getQualifiers();
+ Quals.setObjCGCAttr(getContext().getObjCGCAttrKind(T));
+ return Quals;
+ }
+
+ /// CreateTempAlloca - This creates a alloca and inserts it into the entry
+ /// block. The caller is responsible for setting an appropriate alignment on
+ /// the alloca.
+ llvm::AllocaInst *CreateTempAlloca(const llvm::Type *Ty,
+ const llvm::Twine &Name = "tmp");
+
+ /// CreateMemTemp - Create a temporary memory object of the given type, with
+ /// appropriate alignment.
+ llvm::Value *CreateMemTemp(QualType T, const llvm::Twine &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);
+
+ llvm::BlockAddress *GetAddrOfLabel(const LabelStmt *L);
+ llvm::BasicBlock *GetIndirectGotoBlock();
+
+ /// 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();
+
+ /// LoadCXXVTT - Load the VTT parameter to base constructors/destructors have
+ /// virtual bases.
+ llvm::Value *LoadCXXVTT();
+
+ /// GetAddressOfBaseClass - 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 *GetAddressOfBaseClass(llvm::Value *Value,
+ const CXXRecordDecl *ClassDecl,
+ const CXXRecordDecl *BaseClassDecl,
+ bool NullCheckValue);
+
+ llvm::Value *GetAddressOfDerivedClass(llvm::Value *Value,
+ const CXXRecordDecl *ClassDecl,
+ const CXXRecordDecl *DerivedClassDecl,
+ bool NullCheckValue);
+
+ llvm::Value *GetVirtualBaseClassOffset(llvm::Value *This,
+ 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 ConstantArrayType *ArrayTy,
+ llvm::Value *ArrayPtr,
+ CallExpr::const_arg_iterator ArgBeg,
+ CallExpr::const_arg_iterator ArgEnd);
+
+ void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
+ llvm::Value *NumElements,
+ llvm::Value *ArrayPtr,
+ CallExpr::const_arg_iterator ArgBeg,
+ CallExpr::const_arg_iterator ArgEnd);
+
+ void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
+ const ArrayType *Array,
+ llvm::Value *This);
+
+ void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
+ llvm::Value *NumElements,
+ llvm::Value *This);
+
+ llvm::Constant *GenerateCXXAggrDestructorHelper(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);
+
+ void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr,
+ QualType DeleteTy);
+
+ llvm::Value* EmitCXXTypeidExpr(const CXXTypeidExpr *E);
+ llvm::Value *EmitDynamicCast(llvm::Value *V, const CXXDynamicCastExpr *DCE);
+
+ void EmitCheck(llvm::Value *, unsigned Size);
+
+ llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
+ bool isInc, bool isPre);
+ ComplexPairTy EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV,
+ bool isInc, bool isPre);
+ //===--------------------------------------------------------------------===//
+ // 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,
+ llvm::GlobalValue::LinkageTypes Linkage);
+
+ /// 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);
+
+ void EmitCXXTryStmt(const CXXTryStmt &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);
+
+ /// EmitCheckedLValue - Same as EmitLValue but additionally we generate
+ /// checking code to guard against undefined behavior. This is only
+ /// suitable when we know that the address will be used to access the
+ /// object.
+ LValue EmitCheckedLValue(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 EmitObjCIsaExpr(const ObjCIsaExpr *E);
+ LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E);
+ LValue EmitConditionalOperatorLValue(const ConditionalOperator *E);
+ LValue EmitCastLValue(const CastExpr *E);
+ LValue EmitNullInitializationLValue(const CXXZeroInitValueExpr *E);
+
+ llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
+ const ObjCIvarDecl *Ivar);
+ LValue EmitLValueForField(llvm::Value* Base, const FieldDecl* Field,
+ unsigned CVRQualifiers);
+
+ /// EmitLValueForFieldInitialization - Like EmitLValueForField, except that
+ /// if the Field is a reference, this will return the address of the reference
+ /// and not the address of the value stored in the reference.
+ LValue EmitLValueForFieldInitialization(llvm::Value* Base,
+ const FieldDecl* Field,
+ unsigned CVRQualifiers);
+
+ LValue EmitLValueForIvar(QualType ObjectTy,
+ llvm::Value* Base, const ObjCIvarDecl *Ivar,
+ unsigned CVRQualifiers);
+
+ LValue EmitLValueForBitfield(llvm::Value* Base, const FieldDecl* Field,
+ unsigned CVRQualifiers);
+
+ LValue EmitBlockDeclRefLValue(const BlockDeclRefExpr *E);
+
+ LValue EmitCXXConstructLValue(const CXXConstructExpr *E);
+ LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E);
+ LValue EmitCXXExprWithTemporariesLValue(const CXXExprWithTemporaries *E);
+ LValue EmitCXXTypeidLValue(const CXXTypeidExpr *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);
+ LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *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,
+ ReturnValueSlot ReturnValue,
+ const CallArgList &Args,
+ const Decl *TargetDecl = 0);
+
+ RValue EmitCall(QualType FnType, llvm::Value *Callee,
+ ReturnValueSlot ReturnValue,
+ CallExpr::const_arg_iterator ArgBeg,
+ CallExpr::const_arg_iterator ArgEnd,
+ const Decl *TargetDecl = 0);
+ RValue EmitCallExpr(const CallExpr *E,
+ ReturnValueSlot ReturnValue = ReturnValueSlot());
+
+ llvm::Value *BuildVirtualCall(const CXXMethodDecl *MD, llvm::Value *This,
+ const llvm::Type *Ty);
+ llvm::Value *BuildVirtualCall(const CXXDestructorDecl *DD, CXXDtorType Type,
+ llvm::Value *&This, const llvm::Type *Ty);
+
+ RValue EmitCXXMemberCall(const CXXMethodDecl *MD,
+ llvm::Value *Callee,
+ ReturnValueSlot ReturnValue,
+ llvm::Value *This,
+ llvm::Value *VTT,
+ CallExpr::const_arg_iterator ArgBeg,
+ CallExpr::const_arg_iterator ArgEnd);
+ RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E,
+ ReturnValueSlot ReturnValue);
+ RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
+ ReturnValueSlot ReturnValue);
+
+ RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
+ const CXXMethodDecl *MD,
+ ReturnValueSlot ReturnValue);
+
+
+ RValue EmitBuiltinExpr(const FunctionDecl *FD,
+ unsigned BuiltinID, const CallExpr *E);
+
+ RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
+
+ /// 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 *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, 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);
+
+ /// EmitAggExprToLValue - Emit the computation of the specified expression of
+ /// aggregate type into a temporary LValue.
+ LValue EmitAggExprToLValue(const Expr *E);
+
+ /// 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);
+
+ /// AddInitializerToGlobalBlockVarDecl - Add the initializer for 'D' to the
+ /// global variable that has already been created for it. If the initializer
+ /// has a different type than GV does, this may free GV and return a different
+ /// one. Otherwise it just returns GV.
+ llvm::GlobalVariable *
+ AddInitializerToGlobalBlockVarDecl(const VarDecl &D,
+ llvm::GlobalVariable *GV);
+
+
+ /// 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(llvm::Constant *DtorFn,
+ llvm::Constant *DeclPtr);
+
+ /// GenerateCXXGlobalInitFunc - Generates code for initializing global
+ /// variables.
+ void GenerateCXXGlobalInitFunc(llvm::Function *Fn,
+ llvm::Constant **Decls,
+ unsigned NumDecls);
+
+ void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn, const VarDecl *D);
+
+ void EmitCXXConstructExpr(llvm::Value *Dest, const CXXConstructExpr *E);
+
+ RValue EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
+ llvm::Value *AggLoc = 0,
+ bool IsAggLocVolatile = false,
+ bool IsInitializer = false);
+
+ void EmitCXXThrowExpr(const CXXThrowExpr *E);
+
+ //===--------------------------------------------------------------------===//
+ // 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);
+
+ /// getTrapBB - Create a basic block that will call the trap intrinsic. We'll
+ /// generate a branch around the created basic block as necessary.
+ llvm::BasicBlock* getTrapBB();
+private:
+
+ 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) {
+ assert(Arg != ArgEnd && "Running over edge of argument list!");
+ 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