mirror of
https://github.com/RPCS3/llvm-mirror.git
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097a206969
This fixes leaks from LLVMContext in multithreaded apps. Since constants are only deleted if they have no uses, it is safe to not delete a Module on shutdown, as many single-threaded tools do. Multithreaded apps should however delete the Module before destroying the Context to ensure that there are no leaks (assuming they use a different context for each thread). llvm-svn: 80590
792 lines
29 KiB
C++
792 lines
29 KiB
C++
//===-- ConstantsContext.h - Constants-related Context Interals -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines various helper methods and classes used by
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// LLVMContextImpl for creating and managing constants.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CONSTANTSCONTEXT_H
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#define LLVM_CONSTANTSCONTEXT_H
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#include "llvm/Instructions.h"
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#include "llvm/Metadata.h"
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#include "llvm/Operator.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/System/Mutex.h"
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#include "llvm/System/RWMutex.h"
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#include <map>
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namespace llvm {
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template<class ValType>
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struct ConstantTraits;
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/// UnaryConstantExpr - This class is private to Constants.cpp, and is used
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/// behind the scenes to implement unary constant exprs.
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class UnaryConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly one operand
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void *operator new(size_t s) {
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return User::operator new(s, 1);
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}
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UnaryConstantExpr(unsigned Opcode, Constant *C, const Type *Ty)
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: ConstantExpr(Ty, Opcode, &Op<0>(), 1) {
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Op<0>() = C;
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}
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// BinaryConstantExpr - This class is private to Constants.cpp, and is used
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/// behind the scenes to implement binary constant exprs.
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class BinaryConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly two operands
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void *operator new(size_t s) {
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return User::operator new(s, 2);
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}
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BinaryConstantExpr(unsigned Opcode, Constant *C1, Constant *C2)
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: ConstantExpr(C1->getType(), Opcode, &Op<0>(), 2) {
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Op<0>() = C1;
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Op<1>() = C2;
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// SelectConstantExpr - This class is private to Constants.cpp, and is used
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/// behind the scenes to implement select constant exprs.
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class SelectConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly three operands
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void *operator new(size_t s) {
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return User::operator new(s, 3);
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}
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SelectConstantExpr(Constant *C1, Constant *C2, Constant *C3)
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: ConstantExpr(C2->getType(), Instruction::Select, &Op<0>(), 3) {
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Op<0>() = C1;
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Op<1>() = C2;
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Op<2>() = C3;
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// ExtractElementConstantExpr - This class is private to
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/// Constants.cpp, and is used behind the scenes to implement
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/// extractelement constant exprs.
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class ExtractElementConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly two operands
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void *operator new(size_t s) {
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return User::operator new(s, 2);
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}
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ExtractElementConstantExpr(Constant *C1, Constant *C2)
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: ConstantExpr(cast<VectorType>(C1->getType())->getElementType(),
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Instruction::ExtractElement, &Op<0>(), 2) {
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Op<0>() = C1;
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Op<1>() = C2;
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// InsertElementConstantExpr - This class is private to
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/// Constants.cpp, and is used behind the scenes to implement
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/// insertelement constant exprs.
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class InsertElementConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly three operands
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void *operator new(size_t s) {
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return User::operator new(s, 3);
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}
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InsertElementConstantExpr(Constant *C1, Constant *C2, Constant *C3)
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: ConstantExpr(C1->getType(), Instruction::InsertElement,
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&Op<0>(), 3) {
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Op<0>() = C1;
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Op<1>() = C2;
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Op<2>() = C3;
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// ShuffleVectorConstantExpr - This class is private to
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/// Constants.cpp, and is used behind the scenes to implement
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/// shufflevector constant exprs.
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class ShuffleVectorConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly three operands
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void *operator new(size_t s) {
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return User::operator new(s, 3);
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}
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ShuffleVectorConstantExpr(Constant *C1, Constant *C2, Constant *C3)
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: ConstantExpr(VectorType::get(
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cast<VectorType>(C1->getType())->getElementType(),
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cast<VectorType>(C3->getType())->getNumElements()),
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Instruction::ShuffleVector,
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&Op<0>(), 3) {
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Op<0>() = C1;
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Op<1>() = C2;
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Op<2>() = C3;
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// ExtractValueConstantExpr - This class is private to
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/// Constants.cpp, and is used behind the scenes to implement
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/// extractvalue constant exprs.
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class ExtractValueConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly one operand
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void *operator new(size_t s) {
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return User::operator new(s, 1);
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}
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ExtractValueConstantExpr(Constant *Agg,
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const SmallVector<unsigned, 4> &IdxList,
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const Type *DestTy)
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: ConstantExpr(DestTy, Instruction::ExtractValue, &Op<0>(), 1),
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Indices(IdxList) {
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Op<0>() = Agg;
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}
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/// Indices - These identify which value to extract.
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const SmallVector<unsigned, 4> Indices;
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// InsertValueConstantExpr - This class is private to
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/// Constants.cpp, and is used behind the scenes to implement
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/// insertvalue constant exprs.
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class InsertValueConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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public:
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// allocate space for exactly one operand
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void *operator new(size_t s) {
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return User::operator new(s, 2);
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}
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InsertValueConstantExpr(Constant *Agg, Constant *Val,
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const SmallVector<unsigned, 4> &IdxList,
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const Type *DestTy)
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: ConstantExpr(DestTy, Instruction::InsertValue, &Op<0>(), 2),
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Indices(IdxList) {
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Op<0>() = Agg;
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Op<1>() = Val;
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}
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/// Indices - These identify the position for the insertion.
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const SmallVector<unsigned, 4> Indices;
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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/// GetElementPtrConstantExpr - This class is private to Constants.cpp, and is
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/// used behind the scenes to implement getelementpr constant exprs.
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class GetElementPtrConstantExpr : public ConstantExpr {
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GetElementPtrConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
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const Type *DestTy);
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public:
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static GetElementPtrConstantExpr *Create(Constant *C,
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const std::vector<Constant*>&IdxList,
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const Type *DestTy) {
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return
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new(IdxList.size() + 1) GetElementPtrConstantExpr(C, IdxList, DestTy);
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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// CompareConstantExpr - This class is private to Constants.cpp, and is used
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// behind the scenes to implement ICmp and FCmp constant expressions. This is
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// needed in order to store the predicate value for these instructions.
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struct CompareConstantExpr : public ConstantExpr {
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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// allocate space for exactly two operands
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void *operator new(size_t s) {
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return User::operator new(s, 2);
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}
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unsigned short predicate;
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CompareConstantExpr(const Type *ty, Instruction::OtherOps opc,
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unsigned short pred, Constant* LHS, Constant* RHS)
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: ConstantExpr(ty, opc, &Op<0>(), 2), predicate(pred) {
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Op<0>() = LHS;
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Op<1>() = RHS;
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}
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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};
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template <>
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struct OperandTraits<UnaryConstantExpr> : FixedNumOperandTraits<1> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(UnaryConstantExpr, Value)
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template <>
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struct OperandTraits<BinaryConstantExpr> : FixedNumOperandTraits<2> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BinaryConstantExpr, Value)
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template <>
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struct OperandTraits<SelectConstantExpr> : FixedNumOperandTraits<3> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(SelectConstantExpr, Value)
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template <>
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struct OperandTraits<ExtractElementConstantExpr> : FixedNumOperandTraits<2> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ExtractElementConstantExpr, Value)
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template <>
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struct OperandTraits<InsertElementConstantExpr> : FixedNumOperandTraits<3> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(InsertElementConstantExpr, Value)
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template <>
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struct OperandTraits<ShuffleVectorConstantExpr> : FixedNumOperandTraits<3> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ShuffleVectorConstantExpr, Value)
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template <>
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struct OperandTraits<ExtractValueConstantExpr> : FixedNumOperandTraits<1> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ExtractValueConstantExpr, Value)
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template <>
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struct OperandTraits<InsertValueConstantExpr> : FixedNumOperandTraits<2> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(InsertValueConstantExpr, Value)
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template <>
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struct OperandTraits<GetElementPtrConstantExpr> : VariadicOperandTraits<1> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GetElementPtrConstantExpr, Value)
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template <>
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struct OperandTraits<CompareConstantExpr> : FixedNumOperandTraits<2> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CompareConstantExpr, Value)
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struct ExprMapKeyType {
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typedef SmallVector<unsigned, 4> IndexList;
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ExprMapKeyType(unsigned opc,
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const std::vector<Constant*> &ops,
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unsigned short pred = 0,
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const IndexList &inds = IndexList())
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: opcode(opc), predicate(pred), operands(ops), indices(inds) {}
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uint16_t opcode;
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uint16_t predicate;
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std::vector<Constant*> operands;
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IndexList indices;
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bool operator==(const ExprMapKeyType& that) const {
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return this->opcode == that.opcode &&
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this->predicate == that.predicate &&
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this->operands == that.operands &&
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this->indices == that.indices;
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}
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bool operator<(const ExprMapKeyType & that) const {
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return this->opcode < that.opcode ||
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(this->opcode == that.opcode && this->predicate < that.predicate) ||
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(this->opcode == that.opcode && this->predicate == that.predicate &&
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this->operands < that.operands) ||
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(this->opcode == that.opcode && this->predicate == that.predicate &&
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this->operands == that.operands && this->indices < that.indices);
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}
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bool operator!=(const ExprMapKeyType& that) const {
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return !(*this == that);
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}
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};
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// The number of operands for each ConstantCreator::create method is
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// determined by the ConstantTraits template.
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// ConstantCreator - A class that is used to create constants by
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// ValueMap*. This class should be partially specialized if there is
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// something strange that needs to be done to interface to the ctor for the
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// constant.
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//
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template<typename T, typename Alloc>
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struct ConstantTraits< std::vector<T, Alloc> > {
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static unsigned uses(const std::vector<T, Alloc>& v) {
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return v.size();
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}
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};
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template<class ConstantClass, class TypeClass, class ValType>
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struct ConstantCreator {
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static ConstantClass *create(const TypeClass *Ty, const ValType &V) {
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return new(ConstantTraits<ValType>::uses(V)) ConstantClass(Ty, V);
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}
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};
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template<class ConstantClass, class TypeClass>
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struct ConvertConstant {
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static void convert(ConstantClass *OldC, const TypeClass *NewTy) {
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llvm_unreachable("This type cannot be converted!");
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}
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};
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template<>
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struct ConstantCreator<ConstantExpr, Type, ExprMapKeyType> {
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static ConstantExpr *create(const Type *Ty, const ExprMapKeyType &V,
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unsigned short pred = 0) {
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if (Instruction::isCast(V.opcode))
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return new UnaryConstantExpr(V.opcode, V.operands[0], Ty);
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if ((V.opcode >= Instruction::BinaryOpsBegin &&
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V.opcode < Instruction::BinaryOpsEnd))
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return new BinaryConstantExpr(V.opcode, V.operands[0], V.operands[1]);
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if (V.opcode == Instruction::Select)
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return new SelectConstantExpr(V.operands[0], V.operands[1],
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V.operands[2]);
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if (V.opcode == Instruction::ExtractElement)
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return new ExtractElementConstantExpr(V.operands[0], V.operands[1]);
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if (V.opcode == Instruction::InsertElement)
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return new InsertElementConstantExpr(V.operands[0], V.operands[1],
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V.operands[2]);
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if (V.opcode == Instruction::ShuffleVector)
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return new ShuffleVectorConstantExpr(V.operands[0], V.operands[1],
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V.operands[2]);
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if (V.opcode == Instruction::InsertValue)
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return new InsertValueConstantExpr(V.operands[0], V.operands[1],
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V.indices, Ty);
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if (V.opcode == Instruction::ExtractValue)
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return new ExtractValueConstantExpr(V.operands[0], V.indices, Ty);
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if (V.opcode == Instruction::GetElementPtr) {
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std::vector<Constant*> IdxList(V.operands.begin()+1, V.operands.end());
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return GetElementPtrConstantExpr::Create(V.operands[0], IdxList, Ty);
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}
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// The compare instructions are weird. We have to encode the predicate
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// value and it is combined with the instruction opcode by multiplying
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// the opcode by one hundred. We must decode this to get the predicate.
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if (V.opcode == Instruction::ICmp)
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return new CompareConstantExpr(Ty, Instruction::ICmp, V.predicate,
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V.operands[0], V.operands[1]);
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if (V.opcode == Instruction::FCmp)
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return new CompareConstantExpr(Ty, Instruction::FCmp, V.predicate,
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V.operands[0], V.operands[1]);
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llvm_unreachable("Invalid ConstantExpr!");
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return 0;
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}
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};
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template<>
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struct ConvertConstant<ConstantExpr, Type> {
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static void convert(ConstantExpr *OldC, const Type *NewTy) {
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Constant *New;
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switch (OldC->getOpcode()) {
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case Instruction::Trunc:
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case Instruction::ZExt:
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case Instruction::SExt:
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case Instruction::FPTrunc:
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case Instruction::FPExt:
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case Instruction::UIToFP:
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case Instruction::SIToFP:
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case Instruction::FPToUI:
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case Instruction::FPToSI:
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case Instruction::PtrToInt:
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case Instruction::IntToPtr:
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case Instruction::BitCast:
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New = ConstantExpr::getCast(OldC->getOpcode(), OldC->getOperand(0),
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NewTy);
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break;
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case Instruction::Select:
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New = ConstantExpr::getSelectTy(NewTy, OldC->getOperand(0),
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OldC->getOperand(1),
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OldC->getOperand(2));
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break;
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default:
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assert(OldC->getOpcode() >= Instruction::BinaryOpsBegin &&
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OldC->getOpcode() < Instruction::BinaryOpsEnd);
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New = ConstantExpr::getTy(NewTy, OldC->getOpcode(), OldC->getOperand(0),
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OldC->getOperand(1));
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break;
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case Instruction::GetElementPtr:
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// Make everyone now use a constant of the new type...
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std::vector<Value*> Idx(OldC->op_begin()+1, OldC->op_end());
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New = ConstantExpr::getGetElementPtrTy(NewTy, OldC->getOperand(0),
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&Idx[0], Idx.size());
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break;
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}
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assert(New != OldC && "Didn't replace constant??");
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OldC->uncheckedReplaceAllUsesWith(New);
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OldC->destroyConstant(); // This constant is now dead, destroy it.
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}
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};
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// ConstantAggregateZero does not take extra "value" argument...
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template<class ValType>
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struct ConstantCreator<ConstantAggregateZero, Type, ValType> {
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static ConstantAggregateZero *create(const Type *Ty, const ValType &V){
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return new ConstantAggregateZero(Ty);
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}
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};
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template<>
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struct ConstantCreator<MDNode, Type, std::vector<Value*> > {
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static MDNode *create(const Type* Ty, const std::vector<Value*> &V) {
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return new MDNode(Ty->getContext(), &V[0], V.size());
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}
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};
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template<>
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struct ConvertConstant<ConstantVector, VectorType> {
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static void convert(ConstantVector *OldC, const VectorType *NewTy) {
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// Make everyone now use a constant of the new type...
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std::vector<Constant*> C;
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for (unsigned i = 0, e = OldC->getNumOperands(); i != e; ++i)
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C.push_back(cast<Constant>(OldC->getOperand(i)));
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Constant *New = ConstantVector::get(NewTy, C);
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assert(New != OldC && "Didn't replace constant??");
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OldC->uncheckedReplaceAllUsesWith(New);
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OldC->destroyConstant(); // This constant is now dead, destroy it.
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}
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};
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template<>
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struct ConvertConstant<ConstantAggregateZero, Type> {
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static void convert(ConstantAggregateZero *OldC, const Type *NewTy) {
|
|
// Make everyone now use a constant of the new type...
|
|
Constant *New = ConstantAggregateZero::get(NewTy);
|
|
assert(New != OldC && "Didn't replace constant??");
|
|
OldC->uncheckedReplaceAllUsesWith(New);
|
|
OldC->destroyConstant(); // This constant is now dead, destroy it.
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ConvertConstant<ConstantArray, ArrayType> {
|
|
static void convert(ConstantArray *OldC, const ArrayType *NewTy) {
|
|
// Make everyone now use a constant of the new type...
|
|
std::vector<Constant*> C;
|
|
for (unsigned i = 0, e = OldC->getNumOperands(); i != e; ++i)
|
|
C.push_back(cast<Constant>(OldC->getOperand(i)));
|
|
Constant *New = ConstantArray::get(NewTy, C);
|
|
assert(New != OldC && "Didn't replace constant??");
|
|
OldC->uncheckedReplaceAllUsesWith(New);
|
|
OldC->destroyConstant(); // This constant is now dead, destroy it.
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ConvertConstant<ConstantStruct, StructType> {
|
|
static void convert(ConstantStruct *OldC, const StructType *NewTy) {
|
|
// Make everyone now use a constant of the new type...
|
|
std::vector<Constant*> C;
|
|
for (unsigned i = 0, e = OldC->getNumOperands(); i != e; ++i)
|
|
C.push_back(cast<Constant>(OldC->getOperand(i)));
|
|
Constant *New = ConstantStruct::get(NewTy, C);
|
|
assert(New != OldC && "Didn't replace constant??");
|
|
|
|
OldC->uncheckedReplaceAllUsesWith(New);
|
|
OldC->destroyConstant(); // This constant is now dead, destroy it.
|
|
}
|
|
};
|
|
|
|
// ConstantPointerNull does not take extra "value" argument...
|
|
template<class ValType>
|
|
struct ConstantCreator<ConstantPointerNull, PointerType, ValType> {
|
|
static ConstantPointerNull *create(const PointerType *Ty, const ValType &V){
|
|
return new ConstantPointerNull(Ty);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ConvertConstant<ConstantPointerNull, PointerType> {
|
|
static void convert(ConstantPointerNull *OldC, const PointerType *NewTy) {
|
|
// Make everyone now use a constant of the new type...
|
|
Constant *New = ConstantPointerNull::get(NewTy);
|
|
assert(New != OldC && "Didn't replace constant??");
|
|
OldC->uncheckedReplaceAllUsesWith(New);
|
|
OldC->destroyConstant(); // This constant is now dead, destroy it.
|
|
}
|
|
};
|
|
|
|
// UndefValue does not take extra "value" argument...
|
|
template<class ValType>
|
|
struct ConstantCreator<UndefValue, Type, ValType> {
|
|
static UndefValue *create(const Type *Ty, const ValType &V) {
|
|
return new UndefValue(Ty);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct ConvertConstant<UndefValue, Type> {
|
|
static void convert(UndefValue *OldC, const Type *NewTy) {
|
|
// Make everyone now use a constant of the new type.
|
|
Constant *New = UndefValue::get(NewTy);
|
|
assert(New != OldC && "Didn't replace constant??");
|
|
OldC->uncheckedReplaceAllUsesWith(New);
|
|
OldC->destroyConstant(); // This constant is now dead, destroy it.
|
|
}
|
|
};
|
|
|
|
template<class ValType, class TypeClass, class ConstantClass,
|
|
bool HasLargeKey = false /*true for arrays and structs*/ >
|
|
class ValueMap : public AbstractTypeUser {
|
|
public:
|
|
typedef std::pair<const Type*, ValType> MapKey;
|
|
typedef std::map<MapKey, Value *> MapTy;
|
|
typedef std::map<Value*, typename MapTy::iterator> InverseMapTy;
|
|
typedef std::map<const Type*, typename MapTy::iterator> AbstractTypeMapTy;
|
|
private:
|
|
/// Map - This is the main map from the element descriptor to the Constants.
|
|
/// This is the primary way we avoid creating two of the same shape
|
|
/// constant.
|
|
MapTy Map;
|
|
|
|
/// InverseMap - If "HasLargeKey" is true, this contains an inverse mapping
|
|
/// from the constants to their element in Map. This is important for
|
|
/// removal of constants from the array, which would otherwise have to scan
|
|
/// through the map with very large keys.
|
|
InverseMapTy InverseMap;
|
|
|
|
/// AbstractTypeMap - Map for abstract type constants.
|
|
///
|
|
AbstractTypeMapTy AbstractTypeMap;
|
|
|
|
/// ValueMapLock - Mutex for this map.
|
|
sys::SmartMutex<true> ValueMapLock;
|
|
|
|
public:
|
|
// NOTE: This function is not locked. It is the caller's responsibility
|
|
// to enforce proper synchronization.
|
|
typename MapTy::iterator map_begin() { return Map.begin(); }
|
|
typename MapTy::iterator map_end() { return Map.end(); }
|
|
|
|
void freeConstants() {
|
|
for (typename MapTy::iterator I=Map.begin(), E=Map.end();
|
|
I != E; ++I) {
|
|
if (I->second->use_empty())
|
|
delete I->second;
|
|
}
|
|
}
|
|
|
|
/// InsertOrGetItem - Return an iterator for the specified element.
|
|
/// If the element exists in the map, the returned iterator points to the
|
|
/// entry and Exists=true. If not, the iterator points to the newly
|
|
/// inserted entry and returns Exists=false. Newly inserted entries have
|
|
/// I->second == 0, and should be filled in.
|
|
/// NOTE: This function is not locked. It is the caller's responsibility
|
|
// to enforce proper synchronization.
|
|
typename MapTy::iterator InsertOrGetItem(std::pair<MapKey, Constant *>
|
|
&InsertVal,
|
|
bool &Exists) {
|
|
std::pair<typename MapTy::iterator, bool> IP = Map.insert(InsertVal);
|
|
Exists = !IP.second;
|
|
return IP.first;
|
|
}
|
|
|
|
private:
|
|
typename MapTy::iterator FindExistingElement(ConstantClass *CP) {
|
|
if (HasLargeKey) {
|
|
typename InverseMapTy::iterator IMI = InverseMap.find(CP);
|
|
assert(IMI != InverseMap.end() && IMI->second != Map.end() &&
|
|
IMI->second->second == CP &&
|
|
"InverseMap corrupt!");
|
|
return IMI->second;
|
|
}
|
|
|
|
typename MapTy::iterator I =
|
|
Map.find(MapKey(static_cast<const TypeClass*>(CP->getRawType()),
|
|
getValType(CP)));
|
|
if (I == Map.end() || I->second != CP) {
|
|
// FIXME: This should not use a linear scan. If this gets to be a
|
|
// performance problem, someone should look at this.
|
|
for (I = Map.begin(); I != Map.end() && I->second != CP; ++I)
|
|
/* empty */;
|
|
}
|
|
return I;
|
|
}
|
|
|
|
ConstantClass* Create(const TypeClass *Ty, const ValType &V,
|
|
typename MapTy::iterator I) {
|
|
ConstantClass* Result =
|
|
ConstantCreator<ConstantClass,TypeClass,ValType>::create(Ty, V);
|
|
|
|
assert(Result->getType() == Ty && "Type specified is not correct!");
|
|
I = Map.insert(I, std::make_pair(MapKey(Ty, V), Result));
|
|
|
|
if (HasLargeKey) // Remember the reverse mapping if needed.
|
|
InverseMap.insert(std::make_pair(Result, I));
|
|
|
|
// If the type of the constant is abstract, make sure that an entry
|
|
// exists for it in the AbstractTypeMap.
|
|
if (Ty->isAbstract()) {
|
|
typename AbstractTypeMapTy::iterator TI =
|
|
AbstractTypeMap.find(Ty);
|
|
|
|
if (TI == AbstractTypeMap.end()) {
|
|
// Add ourselves to the ATU list of the type.
|
|
cast<DerivedType>(Ty)->addAbstractTypeUser(this);
|
|
|
|
AbstractTypeMap.insert(TI, std::make_pair(Ty, I));
|
|
}
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
public:
|
|
|
|
/// getOrCreate - Return the specified constant from the map, creating it if
|
|
/// necessary.
|
|
ConstantClass *getOrCreate(const TypeClass *Ty, const ValType &V) {
|
|
sys::SmartScopedLock<true> Lock(ValueMapLock);
|
|
MapKey Lookup(Ty, V);
|
|
ConstantClass* Result = 0;
|
|
|
|
typename MapTy::iterator I = Map.find(Lookup);
|
|
// Is it in the map?
|
|
if (I != Map.end())
|
|
Result = static_cast<ConstantClass *>(I->second);
|
|
|
|
if (!Result) {
|
|
// If no preexisting value, create one now...
|
|
Result = Create(Ty, V, I);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
void remove(ConstantClass *CP) {
|
|
sys::SmartScopedLock<true> Lock(ValueMapLock);
|
|
typename MapTy::iterator I = FindExistingElement(CP);
|
|
assert(I != Map.end() && "Constant not found in constant table!");
|
|
assert(I->second == CP && "Didn't find correct element?");
|
|
|
|
if (HasLargeKey) // Remember the reverse mapping if needed.
|
|
InverseMap.erase(CP);
|
|
|
|
// Now that we found the entry, make sure this isn't the entry that
|
|
// the AbstractTypeMap points to.
|
|
const TypeClass *Ty = static_cast<const TypeClass *>(I->first.first);
|
|
if (Ty->isAbstract()) {
|
|
assert(AbstractTypeMap.count(Ty) &&
|
|
"Abstract type not in AbstractTypeMap?");
|
|
typename MapTy::iterator &ATMEntryIt = AbstractTypeMap[Ty];
|
|
if (ATMEntryIt == I) {
|
|
// Yes, we are removing the representative entry for this type.
|
|
// See if there are any other entries of the same type.
|
|
typename MapTy::iterator TmpIt = ATMEntryIt;
|
|
|
|
// First check the entry before this one...
|
|
if (TmpIt != Map.begin()) {
|
|
--TmpIt;
|
|
if (TmpIt->first.first != Ty) // Not the same type, move back...
|
|
++TmpIt;
|
|
}
|
|
|
|
// If we didn't find the same type, try to move forward...
|
|
if (TmpIt == ATMEntryIt) {
|
|
++TmpIt;
|
|
if (TmpIt == Map.end() || TmpIt->first.first != Ty)
|
|
--TmpIt; // No entry afterwards with the same type
|
|
}
|
|
|
|
// If there is another entry in the map of the same abstract type,
|
|
// update the AbstractTypeMap entry now.
|
|
if (TmpIt != ATMEntryIt) {
|
|
ATMEntryIt = TmpIt;
|
|
} else {
|
|
// Otherwise, we are removing the last instance of this type
|
|
// from the table. Remove from the ATM, and from user list.
|
|
cast<DerivedType>(Ty)->removeAbstractTypeUser(this);
|
|
AbstractTypeMap.erase(Ty);
|
|
}
|
|
}
|
|
}
|
|
|
|
Map.erase(I);
|
|
}
|
|
|
|
|
|
/// MoveConstantToNewSlot - If we are about to change C to be the element
|
|
/// specified by I, update our internal data structures to reflect this
|
|
/// fact.
|
|
/// NOTE: This function is not locked. It is the responsibility of the
|
|
/// caller to enforce proper synchronization if using this method.
|
|
void MoveConstantToNewSlot(ConstantClass *C, typename MapTy::iterator I) {
|
|
// First, remove the old location of the specified constant in the map.
|
|
typename MapTy::iterator OldI = FindExistingElement(C);
|
|
assert(OldI != Map.end() && "Constant not found in constant table!");
|
|
assert(OldI->second == C && "Didn't find correct element?");
|
|
|
|
// If this constant is the representative element for its abstract type,
|
|
// update the AbstractTypeMap so that the representative element is I.
|
|
if (C->getType()->isAbstract()) {
|
|
typename AbstractTypeMapTy::iterator ATI =
|
|
AbstractTypeMap.find(C->getType());
|
|
assert(ATI != AbstractTypeMap.end() &&
|
|
"Abstract type not in AbstractTypeMap?");
|
|
if (ATI->second == OldI)
|
|
ATI->second = I;
|
|
}
|
|
|
|
// Remove the old entry from the map.
|
|
Map.erase(OldI);
|
|
|
|
// Update the inverse map so that we know that this constant is now
|
|
// located at descriptor I.
|
|
if (HasLargeKey) {
|
|
assert(I->second == C && "Bad inversemap entry!");
|
|
InverseMap[C] = I;
|
|
}
|
|
}
|
|
|
|
void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
|
|
sys::SmartScopedLock<true> Lock(ValueMapLock);
|
|
typename AbstractTypeMapTy::iterator I =
|
|
AbstractTypeMap.find(cast<Type>(OldTy));
|
|
|
|
assert(I != AbstractTypeMap.end() &&
|
|
"Abstract type not in AbstractTypeMap?");
|
|
|
|
// Convert a constant at a time until the last one is gone. The last one
|
|
// leaving will remove() itself, causing the AbstractTypeMapEntry to be
|
|
// eliminated eventually.
|
|
do {
|
|
ConvertConstant<ConstantClass, TypeClass>::convert(
|
|
static_cast<ConstantClass *>(I->second->second),
|
|
cast<TypeClass>(NewTy));
|
|
|
|
I = AbstractTypeMap.find(cast<Type>(OldTy));
|
|
} while (I != AbstractTypeMap.end());
|
|
}
|
|
|
|
// If the type became concrete without being refined to any other existing
|
|
// type, we just remove ourselves from the ATU list.
|
|
void typeBecameConcrete(const DerivedType *AbsTy) {
|
|
AbsTy->removeAbstractTypeUser(this);
|
|
}
|
|
|
|
void dump() const {
|
|
DEBUG(errs() << "Constant.cpp: ValueMap\n");
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|