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AlwaysOpaqueTy is always NULL at this point, and it causes an assertion failure. Fix it by using the just constructed tmp instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80780 91177308-0d34-0410-b5e6-96231b3b80d8
1216 lines
42 KiB
C++
1216 lines
42 KiB
C++
//===-- Type.cpp - Implement the Type class -------------------------------===//
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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 implements the Type class for the VMCore library.
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//
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//===----------------------------------------------------------------------===//
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#include "LLVMContextImpl.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Constants.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Metadata.h"
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#include "llvm/ADT/DepthFirstIterator.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/SCCIterator.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/Compiler.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/ManagedStatic.h"
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#include "llvm/Support/MathExtras.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 "llvm/System/Threading.h"
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#include <algorithm>
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#include <cstdarg>
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using namespace llvm;
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// DEBUG_MERGE_TYPES - Enable this #define to see how and when derived types are
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// created and later destroyed, all in an effort to make sure that there is only
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// a single canonical version of a type.
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//
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// #define DEBUG_MERGE_TYPES 1
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AbstractTypeUser::~AbstractTypeUser() {}
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//===----------------------------------------------------------------------===//
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// Type Class Implementation
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//===----------------------------------------------------------------------===//
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/// Because of the way Type subclasses are allocated, this function is necessary
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/// to use the correct kind of "delete" operator to deallocate the Type object.
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/// Some type objects (FunctionTy, StructTy) allocate additional space after
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/// the space for their derived type to hold the contained types array of
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/// PATypeHandles. Using this allocation scheme means all the PATypeHandles are
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/// allocated with the type object, decreasing allocations and eliminating the
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/// need for a std::vector to be used in the Type class itself.
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/// @brief Type destruction function
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void Type::destroy() const {
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// Structures and Functions allocate their contained types past the end of
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// the type object itself. These need to be destroyed differently than the
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// other types.
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if (isa<FunctionType>(this) || isa<StructType>(this)) {
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// First, make sure we destruct any PATypeHandles allocated by these
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// subclasses. They must be manually destructed.
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for (unsigned i = 0; i < NumContainedTys; ++i)
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ContainedTys[i].PATypeHandle::~PATypeHandle();
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// Now call the destructor for the subclass directly because we're going
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// to delete this as an array of char.
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if (isa<FunctionType>(this))
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static_cast<const FunctionType*>(this)->FunctionType::~FunctionType();
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else
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static_cast<const StructType*>(this)->StructType::~StructType();
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// Finally, remove the memory as an array deallocation of the chars it was
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// constructed from.
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operator delete(const_cast<Type *>(this));
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return;
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}
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// For all the other type subclasses, there is either no contained types or
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// just one (all Sequentials). For Sequentials, the PATypeHandle is not
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// allocated past the type object, its included directly in the SequentialType
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// class. This means we can safely just do "normal" delete of this object and
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// all the destructors that need to run will be run.
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delete this;
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}
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const Type *Type::getPrimitiveType(LLVMContext &C, TypeID IDNumber) {
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switch (IDNumber) {
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case VoidTyID : return getVoidTy(C);
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case FloatTyID : return getFloatTy(C);
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case DoubleTyID : return getDoubleTy(C);
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case X86_FP80TyID : return getX86_FP80Ty(C);
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case FP128TyID : return getFP128Ty(C);
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case PPC_FP128TyID : return getPPC_FP128Ty(C);
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case LabelTyID : return getLabelTy(C);
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case MetadataTyID : return getMetadataTy(C);
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default:
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return 0;
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}
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}
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const Type *Type::getVAArgsPromotedType(LLVMContext &C) const {
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if (ID == IntegerTyID && getSubclassData() < 32)
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return Type::getInt32Ty(C);
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else if (ID == FloatTyID)
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return Type::getDoubleTy(C);
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else
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return this;
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}
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/// getScalarType - If this is a vector type, return the element type,
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/// otherwise return this.
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const Type *Type::getScalarType() const {
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if (const VectorType *VTy = dyn_cast<VectorType>(this))
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return VTy->getElementType();
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return this;
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}
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/// isIntOrIntVector - Return true if this is an integer type or a vector of
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/// integer types.
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///
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bool Type::isIntOrIntVector() const {
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if (isInteger())
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return true;
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if (ID != Type::VectorTyID) return false;
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return cast<VectorType>(this)->getElementType()->isInteger();
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}
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/// isFPOrFPVector - Return true if this is a FP type or a vector of FP types.
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///
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bool Type::isFPOrFPVector() const {
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if (ID == Type::FloatTyID || ID == Type::DoubleTyID ||
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ID == Type::FP128TyID || ID == Type::X86_FP80TyID ||
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ID == Type::PPC_FP128TyID)
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return true;
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if (ID != Type::VectorTyID) return false;
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return cast<VectorType>(this)->getElementType()->isFloatingPoint();
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}
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// canLosslesslyBitCastTo - Return true if this type can be converted to
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// 'Ty' without any reinterpretation of bits. For example, i8* to i32*.
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//
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bool Type::canLosslesslyBitCastTo(const Type *Ty) const {
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// Identity cast means no change so return true
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if (this == Ty)
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return true;
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// They are not convertible unless they are at least first class types
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if (!this->isFirstClassType() || !Ty->isFirstClassType())
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return false;
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// Vector -> Vector conversions are always lossless if the two vector types
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// have the same size, otherwise not.
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if (const VectorType *thisPTy = dyn_cast<VectorType>(this))
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if (const VectorType *thatPTy = dyn_cast<VectorType>(Ty))
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return thisPTy->getBitWidth() == thatPTy->getBitWidth();
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// At this point we have only various mismatches of the first class types
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// remaining and ptr->ptr. Just select the lossless conversions. Everything
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// else is not lossless.
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if (isa<PointerType>(this))
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return isa<PointerType>(Ty);
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return false; // Other types have no identity values
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}
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unsigned Type::getPrimitiveSizeInBits() const {
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switch (getTypeID()) {
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case Type::FloatTyID: return 32;
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case Type::DoubleTyID: return 64;
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case Type::X86_FP80TyID: return 80;
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case Type::FP128TyID: return 128;
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case Type::PPC_FP128TyID: return 128;
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case Type::IntegerTyID: return cast<IntegerType>(this)->getBitWidth();
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case Type::VectorTyID: return cast<VectorType>(this)->getBitWidth();
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default: return 0;
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}
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}
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/// getScalarSizeInBits - If this is a vector type, return the
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/// getPrimitiveSizeInBits value for the element type. Otherwise return the
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/// getPrimitiveSizeInBits value for this type.
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unsigned Type::getScalarSizeInBits() const {
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return getScalarType()->getPrimitiveSizeInBits();
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}
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/// getFPMantissaWidth - Return the width of the mantissa of this type. This
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/// is only valid on floating point types. If the FP type does not
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/// have a stable mantissa (e.g. ppc long double), this method returns -1.
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int Type::getFPMantissaWidth() const {
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if (const VectorType *VTy = dyn_cast<VectorType>(this))
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return VTy->getElementType()->getFPMantissaWidth();
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assert(isFloatingPoint() && "Not a floating point type!");
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if (ID == FloatTyID) return 24;
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if (ID == DoubleTyID) return 53;
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if (ID == X86_FP80TyID) return 64;
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if (ID == FP128TyID) return 113;
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assert(ID == PPC_FP128TyID && "unknown fp type");
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return -1;
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}
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/// isSizedDerivedType - Derived types like structures and arrays are sized
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/// iff all of the members of the type are sized as well. Since asking for
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/// their size is relatively uncommon, move this operation out of line.
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bool Type::isSizedDerivedType() const {
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if (isa<IntegerType>(this))
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return true;
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if (const ArrayType *ATy = dyn_cast<ArrayType>(this))
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return ATy->getElementType()->isSized();
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if (const VectorType *PTy = dyn_cast<VectorType>(this))
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return PTy->getElementType()->isSized();
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if (!isa<StructType>(this))
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return false;
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// Okay, our struct is sized if all of the elements are...
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for (subtype_iterator I = subtype_begin(), E = subtype_end(); I != E; ++I)
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if (!(*I)->isSized())
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return false;
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return true;
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}
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/// getForwardedTypeInternal - This method is used to implement the union-find
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/// algorithm for when a type is being forwarded to another type.
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const Type *Type::getForwardedTypeInternal() const {
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assert(ForwardType && "This type is not being forwarded to another type!");
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// Check to see if the forwarded type has been forwarded on. If so, collapse
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// the forwarding links.
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const Type *RealForwardedType = ForwardType->getForwardedType();
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if (!RealForwardedType)
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return ForwardType; // No it's not forwarded again
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// Yes, it is forwarded again. First thing, add the reference to the new
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// forward type.
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if (RealForwardedType->isAbstract())
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cast<DerivedType>(RealForwardedType)->addRef();
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// Now drop the old reference. This could cause ForwardType to get deleted.
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cast<DerivedType>(ForwardType)->dropRef();
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// Return the updated type.
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ForwardType = RealForwardedType;
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return ForwardType;
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}
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void Type::refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
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llvm_unreachable("Attempting to refine a derived type!");
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}
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void Type::typeBecameConcrete(const DerivedType *AbsTy) {
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llvm_unreachable("DerivedType is already a concrete type!");
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}
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std::string Type::getDescription() const {
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LLVMContextImpl *pImpl = getContext().pImpl;
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TypePrinting &Map =
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isAbstract() ?
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pImpl->AbstractTypeDescriptions :
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pImpl->ConcreteTypeDescriptions;
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std::string DescStr;
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raw_string_ostream DescOS(DescStr);
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Map.print(this, DescOS);
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return DescOS.str();
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}
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bool StructType::indexValid(const Value *V) const {
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// Structure indexes require 32-bit integer constants.
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if (V->getType() == Type::getInt32Ty(V->getContext()))
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if (const ConstantInt *CU = dyn_cast<ConstantInt>(V))
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return indexValid(CU->getZExtValue());
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return false;
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}
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bool StructType::indexValid(unsigned V) const {
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return V < NumContainedTys;
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}
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// getTypeAtIndex - Given an index value into the type, return the type of the
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// element. For a structure type, this must be a constant value...
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//
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const Type *StructType::getTypeAtIndex(const Value *V) const {
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unsigned Idx = (unsigned)cast<ConstantInt>(V)->getZExtValue();
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return getTypeAtIndex(Idx);
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}
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const Type *StructType::getTypeAtIndex(unsigned Idx) const {
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assert(indexValid(Idx) && "Invalid structure index!");
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return ContainedTys[Idx];
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}
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//===----------------------------------------------------------------------===//
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// Primitive 'Type' data
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//===----------------------------------------------------------------------===//
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const Type *Type::getVoidTy(LLVMContext &C) {
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return &C.pImpl->VoidTy;
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}
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const Type *Type::getLabelTy(LLVMContext &C) {
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return &C.pImpl->LabelTy;
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}
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const Type *Type::getFloatTy(LLVMContext &C) {
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return &C.pImpl->FloatTy;
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}
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const Type *Type::getDoubleTy(LLVMContext &C) {
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return &C.pImpl->DoubleTy;
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}
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const Type *Type::getMetadataTy(LLVMContext &C) {
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return &C.pImpl->MetadataTy;
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}
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const Type *Type::getX86_FP80Ty(LLVMContext &C) {
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return &C.pImpl->X86_FP80Ty;
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}
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const Type *Type::getFP128Ty(LLVMContext &C) {
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return &C.pImpl->FP128Ty;
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}
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const Type *Type::getPPC_FP128Ty(LLVMContext &C) {
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return &C.pImpl->PPC_FP128Ty;
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}
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const IntegerType *Type::getInt1Ty(LLVMContext &C) {
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return &C.pImpl->Int1Ty;
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}
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const IntegerType *Type::getInt8Ty(LLVMContext &C) {
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return &C.pImpl->Int8Ty;
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}
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const IntegerType *Type::getInt16Ty(LLVMContext &C) {
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return &C.pImpl->Int16Ty;
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}
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const IntegerType *Type::getInt32Ty(LLVMContext &C) {
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return &C.pImpl->Int32Ty;
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}
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const IntegerType *Type::getInt64Ty(LLVMContext &C) {
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return &C.pImpl->Int64Ty;
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}
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//===----------------------------------------------------------------------===//
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// Derived Type Constructors
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//===----------------------------------------------------------------------===//
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/// isValidReturnType - Return true if the specified type is valid as a return
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/// type.
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bool FunctionType::isValidReturnType(const Type *RetTy) {
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if (RetTy->isFirstClassType()) {
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if (const PointerType *PTy = dyn_cast<PointerType>(RetTy))
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return PTy->getElementType() != Type::getMetadataTy(RetTy->getContext());
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return true;
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}
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if (RetTy == Type::getVoidTy(RetTy->getContext()) ||
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RetTy == Type::getMetadataTy(RetTy->getContext()) ||
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isa<OpaqueType>(RetTy))
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return true;
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// If this is a multiple return case, verify that each return is a first class
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// value and that there is at least one value.
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const StructType *SRetTy = dyn_cast<StructType>(RetTy);
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if (SRetTy == 0 || SRetTy->getNumElements() == 0)
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return false;
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for (unsigned i = 0, e = SRetTy->getNumElements(); i != e; ++i)
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if (!SRetTy->getElementType(i)->isFirstClassType())
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return false;
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return true;
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}
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/// isValidArgumentType - Return true if the specified type is valid as an
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/// argument type.
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bool FunctionType::isValidArgumentType(const Type *ArgTy) {
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if ((!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) ||
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(isa<PointerType>(ArgTy) &&
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cast<PointerType>(ArgTy)->getElementType() ==
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Type::getMetadataTy(ArgTy->getContext())))
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return false;
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return true;
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}
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FunctionType::FunctionType(const Type *Result,
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const std::vector<const Type*> &Params,
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bool IsVarArgs)
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: DerivedType(Result->getContext(), FunctionTyID), isVarArgs(IsVarArgs) {
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ContainedTys = reinterpret_cast<PATypeHandle*>(this+1);
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NumContainedTys = Params.size() + 1; // + 1 for result type
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assert(isValidReturnType(Result) && "invalid return type for function");
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bool isAbstract = Result->isAbstract();
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new (&ContainedTys[0]) PATypeHandle(Result, this);
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for (unsigned i = 0; i != Params.size(); ++i) {
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assert(isValidArgumentType(Params[i]) &&
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"Not a valid type for function argument!");
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new (&ContainedTys[i+1]) PATypeHandle(Params[i], this);
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isAbstract |= Params[i]->isAbstract();
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}
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// Calculate whether or not this type is abstract
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setAbstract(isAbstract);
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}
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StructType::StructType(LLVMContext &C,
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const std::vector<const Type*> &Types, bool isPacked)
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: CompositeType(C, StructTyID) {
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ContainedTys = reinterpret_cast<PATypeHandle*>(this + 1);
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NumContainedTys = Types.size();
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setSubclassData(isPacked);
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bool isAbstract = false;
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for (unsigned i = 0; i < Types.size(); ++i) {
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assert(Types[i] && "<null> type for structure field!");
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assert(isValidElementType(Types[i]) &&
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"Invalid type for structure element!");
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new (&ContainedTys[i]) PATypeHandle(Types[i], this);
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isAbstract |= Types[i]->isAbstract();
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}
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// Calculate whether or not this type is abstract
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setAbstract(isAbstract);
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}
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ArrayType::ArrayType(const Type *ElType, uint64_t NumEl)
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: SequentialType(ArrayTyID, ElType) {
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NumElements = NumEl;
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// Calculate whether or not this type is abstract
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setAbstract(ElType->isAbstract());
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}
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VectorType::VectorType(const Type *ElType, unsigned NumEl)
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: SequentialType(VectorTyID, ElType) {
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NumElements = NumEl;
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setAbstract(ElType->isAbstract());
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assert(NumEl > 0 && "NumEl of a VectorType must be greater than 0");
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assert(isValidElementType(ElType) &&
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"Elements of a VectorType must be a primitive type");
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}
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PointerType::PointerType(const Type *E, unsigned AddrSpace)
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: SequentialType(PointerTyID, E) {
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AddressSpace = AddrSpace;
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// Calculate whether or not this type is abstract
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setAbstract(E->isAbstract());
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}
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OpaqueType::OpaqueType(LLVMContext &C) : DerivedType(C, OpaqueTyID) {
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setAbstract(true);
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#ifdef DEBUG_MERGE_TYPES
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DEBUG(errs() << "Derived new type: " << *this << "\n");
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#endif
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}
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void PATypeHolder::destroy() {
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Ty = 0;
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}
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// dropAllTypeUses - When this (abstract) type is resolved to be equal to
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// another (more concrete) type, we must eliminate all references to other
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// types, to avoid some circular reference problems.
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void DerivedType::dropAllTypeUses() {
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if (NumContainedTys != 0) {
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// The type must stay abstract. To do this, we insert a pointer to a type
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// that will never get resolved, thus will always be abstract.
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static Type *AlwaysOpaqueTy = 0;
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static PATypeHolder* Holder = 0;
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Type *tmp = AlwaysOpaqueTy;
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if (llvm_is_multithreaded()) {
|
|
sys::MemoryFence();
|
|
if (!tmp) {
|
|
llvm_acquire_global_lock();
|
|
tmp = AlwaysOpaqueTy;
|
|
if (!tmp) {
|
|
tmp = OpaqueType::get(getContext());
|
|
PATypeHolder* tmp2 = new PATypeHolder(tmp);
|
|
sys::MemoryFence();
|
|
AlwaysOpaqueTy = tmp;
|
|
Holder = tmp2;
|
|
}
|
|
|
|
llvm_release_global_lock();
|
|
}
|
|
} else if (!AlwaysOpaqueTy) {
|
|
AlwaysOpaqueTy = OpaqueType::get(getContext());
|
|
Holder = new PATypeHolder(AlwaysOpaqueTy);
|
|
}
|
|
|
|
ContainedTys[0] = AlwaysOpaqueTy;
|
|
|
|
// Change the rest of the types to be Int32Ty's. It doesn't matter what we
|
|
// pick so long as it doesn't point back to this type. We choose something
|
|
// concrete to avoid overhead for adding to AbstracTypeUser lists and stuff.
|
|
for (unsigned i = 1, e = NumContainedTys; i != e; ++i)
|
|
ContainedTys[i] = Type::getInt32Ty(getContext());
|
|
}
|
|
}
|
|
|
|
|
|
namespace {
|
|
|
|
/// TypePromotionGraph and graph traits - this is designed to allow us to do
|
|
/// efficient SCC processing of type graphs. This is the exact same as
|
|
/// GraphTraits<Type*>, except that we pretend that concrete types have no
|
|
/// children to avoid processing them.
|
|
struct TypePromotionGraph {
|
|
Type *Ty;
|
|
TypePromotionGraph(Type *T) : Ty(T) {}
|
|
};
|
|
|
|
}
|
|
|
|
namespace llvm {
|
|
template <> struct GraphTraits<TypePromotionGraph> {
|
|
typedef Type NodeType;
|
|
typedef Type::subtype_iterator ChildIteratorType;
|
|
|
|
static inline NodeType *getEntryNode(TypePromotionGraph G) { return G.Ty; }
|
|
static inline ChildIteratorType child_begin(NodeType *N) {
|
|
if (N->isAbstract())
|
|
return N->subtype_begin();
|
|
else // No need to process children of concrete types.
|
|
return N->subtype_end();
|
|
}
|
|
static inline ChildIteratorType child_end(NodeType *N) {
|
|
return N->subtype_end();
|
|
}
|
|
};
|
|
}
|
|
|
|
|
|
// PromoteAbstractToConcrete - This is a recursive function that walks a type
|
|
// graph calculating whether or not a type is abstract.
|
|
//
|
|
void Type::PromoteAbstractToConcrete() {
|
|
if (!isAbstract()) return;
|
|
|
|
scc_iterator<TypePromotionGraph> SI = scc_begin(TypePromotionGraph(this));
|
|
scc_iterator<TypePromotionGraph> SE = scc_end (TypePromotionGraph(this));
|
|
|
|
for (; SI != SE; ++SI) {
|
|
std::vector<Type*> &SCC = *SI;
|
|
|
|
// Concrete types are leaves in the tree. Since an SCC will either be all
|
|
// abstract or all concrete, we only need to check one type.
|
|
if (SCC[0]->isAbstract()) {
|
|
if (isa<OpaqueType>(SCC[0]))
|
|
return; // Not going to be concrete, sorry.
|
|
|
|
// If all of the children of all of the types in this SCC are concrete,
|
|
// then this SCC is now concrete as well. If not, neither this SCC, nor
|
|
// any parent SCCs will be concrete, so we might as well just exit.
|
|
for (unsigned i = 0, e = SCC.size(); i != e; ++i)
|
|
for (Type::subtype_iterator CI = SCC[i]->subtype_begin(),
|
|
E = SCC[i]->subtype_end(); CI != E; ++CI)
|
|
if ((*CI)->isAbstract())
|
|
// If the child type is in our SCC, it doesn't make the entire SCC
|
|
// abstract unless there is a non-SCC abstract type.
|
|
if (std::find(SCC.begin(), SCC.end(), *CI) == SCC.end())
|
|
return; // Not going to be concrete, sorry.
|
|
|
|
// Okay, we just discovered this whole SCC is now concrete, mark it as
|
|
// such!
|
|
for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
|
|
assert(SCC[i]->isAbstract() && "Why are we processing concrete types?");
|
|
|
|
SCC[i]->setAbstract(false);
|
|
}
|
|
|
|
for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
|
|
assert(!SCC[i]->isAbstract() && "Concrete type became abstract?");
|
|
// The type just became concrete, notify all users!
|
|
cast<DerivedType>(SCC[i])->notifyUsesThatTypeBecameConcrete();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Type Structural Equality Testing
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// TypesEqual - Two types are considered structurally equal if they have the
|
|
// same "shape": Every level and element of the types have identical primitive
|
|
// ID's, and the graphs have the same edges/nodes in them. Nodes do not have to
|
|
// be pointer equals to be equivalent though. This uses an optimistic algorithm
|
|
// that assumes that two graphs are the same until proven otherwise.
|
|
//
|
|
static bool TypesEqual(const Type *Ty, const Type *Ty2,
|
|
std::map<const Type *, const Type *> &EqTypes) {
|
|
if (Ty == Ty2) return true;
|
|
if (Ty->getTypeID() != Ty2->getTypeID()) return false;
|
|
if (isa<OpaqueType>(Ty))
|
|
return false; // Two unequal opaque types are never equal
|
|
|
|
std::map<const Type*, const Type*>::iterator It = EqTypes.find(Ty);
|
|
if (It != EqTypes.end())
|
|
return It->second == Ty2; // Looping back on a type, check for equality
|
|
|
|
// Otherwise, add the mapping to the table to make sure we don't get
|
|
// recursion on the types...
|
|
EqTypes.insert(It, std::make_pair(Ty, Ty2));
|
|
|
|
// Two really annoying special cases that breaks an otherwise nice simple
|
|
// algorithm is the fact that arraytypes have sizes that differentiates types,
|
|
// and that function types can be varargs or not. Consider this now.
|
|
//
|
|
if (const IntegerType *ITy = dyn_cast<IntegerType>(Ty)) {
|
|
const IntegerType *ITy2 = cast<IntegerType>(Ty2);
|
|
return ITy->getBitWidth() == ITy2->getBitWidth();
|
|
} else if (const PointerType *PTy = dyn_cast<PointerType>(Ty)) {
|
|
const PointerType *PTy2 = cast<PointerType>(Ty2);
|
|
return PTy->getAddressSpace() == PTy2->getAddressSpace() &&
|
|
TypesEqual(PTy->getElementType(), PTy2->getElementType(), EqTypes);
|
|
} else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
|
|
const StructType *STy2 = cast<StructType>(Ty2);
|
|
if (STy->getNumElements() != STy2->getNumElements()) return false;
|
|
if (STy->isPacked() != STy2->isPacked()) return false;
|
|
for (unsigned i = 0, e = STy2->getNumElements(); i != e; ++i)
|
|
if (!TypesEqual(STy->getElementType(i), STy2->getElementType(i), EqTypes))
|
|
return false;
|
|
return true;
|
|
} else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
|
|
const ArrayType *ATy2 = cast<ArrayType>(Ty2);
|
|
return ATy->getNumElements() == ATy2->getNumElements() &&
|
|
TypesEqual(ATy->getElementType(), ATy2->getElementType(), EqTypes);
|
|
} else if (const VectorType *PTy = dyn_cast<VectorType>(Ty)) {
|
|
const VectorType *PTy2 = cast<VectorType>(Ty2);
|
|
return PTy->getNumElements() == PTy2->getNumElements() &&
|
|
TypesEqual(PTy->getElementType(), PTy2->getElementType(), EqTypes);
|
|
} else if (const FunctionType *FTy = dyn_cast<FunctionType>(Ty)) {
|
|
const FunctionType *FTy2 = cast<FunctionType>(Ty2);
|
|
if (FTy->isVarArg() != FTy2->isVarArg() ||
|
|
FTy->getNumParams() != FTy2->getNumParams() ||
|
|
!TypesEqual(FTy->getReturnType(), FTy2->getReturnType(), EqTypes))
|
|
return false;
|
|
for (unsigned i = 0, e = FTy2->getNumParams(); i != e; ++i) {
|
|
if (!TypesEqual(FTy->getParamType(i), FTy2->getParamType(i), EqTypes))
|
|
return false;
|
|
}
|
|
return true;
|
|
} else {
|
|
llvm_unreachable("Unknown derived type!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool TypesEqual(const Type *Ty, const Type *Ty2) {
|
|
std::map<const Type *, const Type *> EqTypes;
|
|
return TypesEqual(Ty, Ty2, EqTypes);
|
|
}
|
|
|
|
// AbstractTypeHasCycleThrough - Return true there is a path from CurTy to
|
|
// TargetTy in the type graph. We know that Ty is an abstract type, so if we
|
|
// ever reach a non-abstract type, we know that we don't need to search the
|
|
// subgraph.
|
|
static bool AbstractTypeHasCycleThrough(const Type *TargetTy, const Type *CurTy,
|
|
SmallPtrSet<const Type*, 128> &VisitedTypes) {
|
|
if (TargetTy == CurTy) return true;
|
|
if (!CurTy->isAbstract()) return false;
|
|
|
|
if (!VisitedTypes.insert(CurTy))
|
|
return false; // Already been here.
|
|
|
|
for (Type::subtype_iterator I = CurTy->subtype_begin(),
|
|
E = CurTy->subtype_end(); I != E; ++I)
|
|
if (AbstractTypeHasCycleThrough(TargetTy, *I, VisitedTypes))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static bool ConcreteTypeHasCycleThrough(const Type *TargetTy, const Type *CurTy,
|
|
SmallPtrSet<const Type*, 128> &VisitedTypes) {
|
|
if (TargetTy == CurTy) return true;
|
|
|
|
if (!VisitedTypes.insert(CurTy))
|
|
return false; // Already been here.
|
|
|
|
for (Type::subtype_iterator I = CurTy->subtype_begin(),
|
|
E = CurTy->subtype_end(); I != E; ++I)
|
|
if (ConcreteTypeHasCycleThrough(TargetTy, *I, VisitedTypes))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/// TypeHasCycleThroughItself - Return true if the specified type has a cycle
|
|
/// back to itself.
|
|
static bool TypeHasCycleThroughItself(const Type *Ty) {
|
|
SmallPtrSet<const Type*, 128> VisitedTypes;
|
|
|
|
if (Ty->isAbstract()) { // Optimized case for abstract types.
|
|
for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
|
|
I != E; ++I)
|
|
if (AbstractTypeHasCycleThrough(Ty, *I, VisitedTypes))
|
|
return true;
|
|
} else {
|
|
for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
|
|
I != E; ++I)
|
|
if (ConcreteTypeHasCycleThrough(Ty, *I, VisitedTypes))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Function Type Factory and Value Class...
|
|
//
|
|
const IntegerType *IntegerType::get(LLVMContext &C, unsigned NumBits) {
|
|
assert(NumBits >= MIN_INT_BITS && "bitwidth too small");
|
|
assert(NumBits <= MAX_INT_BITS && "bitwidth too large");
|
|
|
|
// Check for the built-in integer types
|
|
switch (NumBits) {
|
|
case 1: return cast<IntegerType>(Type::getInt1Ty(C));
|
|
case 8: return cast<IntegerType>(Type::getInt8Ty(C));
|
|
case 16: return cast<IntegerType>(Type::getInt16Ty(C));
|
|
case 32: return cast<IntegerType>(Type::getInt32Ty(C));
|
|
case 64: return cast<IntegerType>(Type::getInt64Ty(C));
|
|
default:
|
|
break;
|
|
}
|
|
|
|
LLVMContextImpl *pImpl = C.pImpl;
|
|
|
|
IntegerValType IVT(NumBits);
|
|
IntegerType *ITy = 0;
|
|
|
|
// First, see if the type is already in the table, for which
|
|
// a reader lock suffices.
|
|
sys::SmartScopedLock<true> L(pImpl->TypeMapLock);
|
|
ITy = pImpl->IntegerTypes.get(IVT);
|
|
|
|
if (!ITy) {
|
|
// Value not found. Derive a new type!
|
|
ITy = new IntegerType(C, NumBits);
|
|
pImpl->IntegerTypes.add(IVT, ITy);
|
|
}
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
DEBUG(errs() << "Derived new type: " << *ITy << "\n");
|
|
#endif
|
|
return ITy;
|
|
}
|
|
|
|
bool IntegerType::isPowerOf2ByteWidth() const {
|
|
unsigned BitWidth = getBitWidth();
|
|
return (BitWidth > 7) && isPowerOf2_32(BitWidth);
|
|
}
|
|
|
|
APInt IntegerType::getMask() const {
|
|
return APInt::getAllOnesValue(getBitWidth());
|
|
}
|
|
|
|
FunctionValType FunctionValType::get(const FunctionType *FT) {
|
|
// Build up a FunctionValType
|
|
std::vector<const Type *> ParamTypes;
|
|
ParamTypes.reserve(FT->getNumParams());
|
|
for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
|
|
ParamTypes.push_back(FT->getParamType(i));
|
|
return FunctionValType(FT->getReturnType(), ParamTypes, FT->isVarArg());
|
|
}
|
|
|
|
|
|
// FunctionType::get - The factory function for the FunctionType class...
|
|
FunctionType *FunctionType::get(const Type *ReturnType,
|
|
const std::vector<const Type*> &Params,
|
|
bool isVarArg) {
|
|
FunctionValType VT(ReturnType, Params, isVarArg);
|
|
FunctionType *FT = 0;
|
|
|
|
LLVMContextImpl *pImpl = ReturnType->getContext().pImpl;
|
|
|
|
sys::SmartScopedLock<true> L(pImpl->TypeMapLock);
|
|
FT = pImpl->FunctionTypes.get(VT);
|
|
|
|
if (!FT) {
|
|
FT = (FunctionType*) operator new(sizeof(FunctionType) +
|
|
sizeof(PATypeHandle)*(Params.size()+1));
|
|
new (FT) FunctionType(ReturnType, Params, isVarArg);
|
|
pImpl->FunctionTypes.add(VT, FT);
|
|
}
|
|
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
DEBUG(errs() << "Derived new type: " << FT << "\n");
|
|
#endif
|
|
return FT;
|
|
}
|
|
|
|
ArrayType *ArrayType::get(const Type *ElementType, uint64_t NumElements) {
|
|
assert(ElementType && "Can't get array of <null> types!");
|
|
assert(isValidElementType(ElementType) && "Invalid type for array element!");
|
|
|
|
ArrayValType AVT(ElementType, NumElements);
|
|
ArrayType *AT = 0;
|
|
|
|
LLVMContextImpl *pImpl = ElementType->getContext().pImpl;
|
|
|
|
sys::SmartScopedLock<true> L(pImpl->TypeMapLock);
|
|
AT = pImpl->ArrayTypes.get(AVT);
|
|
|
|
if (!AT) {
|
|
// Value not found. Derive a new type!
|
|
pImpl->ArrayTypes.add(AVT, AT = new ArrayType(ElementType, NumElements));
|
|
}
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
DEBUG(errs() << "Derived new type: " << *AT << "\n");
|
|
#endif
|
|
return AT;
|
|
}
|
|
|
|
bool ArrayType::isValidElementType(const Type *ElemTy) {
|
|
if (ElemTy == Type::getVoidTy(ElemTy->getContext()) ||
|
|
ElemTy == Type::getLabelTy(ElemTy->getContext()) ||
|
|
ElemTy == Type::getMetadataTy(ElemTy->getContext()))
|
|
return false;
|
|
|
|
if (const PointerType *PTy = dyn_cast<PointerType>(ElemTy))
|
|
if (PTy->getElementType() == Type::getMetadataTy(ElemTy->getContext()))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
VectorType *VectorType::get(const Type *ElementType, unsigned NumElements) {
|
|
assert(ElementType && "Can't get vector of <null> types!");
|
|
|
|
VectorValType PVT(ElementType, NumElements);
|
|
VectorType *PT = 0;
|
|
|
|
LLVMContextImpl *pImpl = ElementType->getContext().pImpl;
|
|
|
|
sys::SmartScopedLock<true> L(pImpl->TypeMapLock);
|
|
PT = pImpl->VectorTypes.get(PVT);
|
|
|
|
if (!PT) {
|
|
pImpl->VectorTypes.add(PVT, PT = new VectorType(ElementType, NumElements));
|
|
}
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
DEBUG(errs() << "Derived new type: " << *PT << "\n");
|
|
#endif
|
|
return PT;
|
|
}
|
|
|
|
bool VectorType::isValidElementType(const Type *ElemTy) {
|
|
if (ElemTy->isInteger() || ElemTy->isFloatingPoint() ||
|
|
isa<OpaqueType>(ElemTy))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Struct Type Factory...
|
|
//
|
|
|
|
StructType *StructType::get(LLVMContext &Context,
|
|
const std::vector<const Type*> &ETypes,
|
|
bool isPacked) {
|
|
StructValType STV(ETypes, isPacked);
|
|
StructType *ST = 0;
|
|
|
|
LLVMContextImpl *pImpl = Context.pImpl;
|
|
|
|
sys::SmartScopedLock<true> L(pImpl->TypeMapLock);
|
|
ST = pImpl->StructTypes.get(STV);
|
|
|
|
if (!ST) {
|
|
// Value not found. Derive a new type!
|
|
ST = (StructType*) operator new(sizeof(StructType) +
|
|
sizeof(PATypeHandle) * ETypes.size());
|
|
new (ST) StructType(Context, ETypes, isPacked);
|
|
pImpl->StructTypes.add(STV, ST);
|
|
}
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
DEBUG(errs() << "Derived new type: " << *ST << "\n");
|
|
#endif
|
|
return ST;
|
|
}
|
|
|
|
StructType *StructType::get(LLVMContext &Context, const Type *type, ...) {
|
|
va_list ap;
|
|
std::vector<const llvm::Type*> StructFields;
|
|
va_start(ap, type);
|
|
while (type) {
|
|
StructFields.push_back(type);
|
|
type = va_arg(ap, llvm::Type*);
|
|
}
|
|
return llvm::StructType::get(Context, StructFields);
|
|
}
|
|
|
|
bool StructType::isValidElementType(const Type *ElemTy) {
|
|
if (ElemTy == Type::getVoidTy(ElemTy->getContext()) ||
|
|
ElemTy == Type::getLabelTy(ElemTy->getContext()) ||
|
|
ElemTy == Type::getMetadataTy(ElemTy->getContext()))
|
|
return false;
|
|
|
|
if (const PointerType *PTy = dyn_cast<PointerType>(ElemTy))
|
|
if (PTy->getElementType() == Type::getMetadataTy(ElemTy->getContext()))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Pointer Type Factory...
|
|
//
|
|
|
|
PointerType *PointerType::get(const Type *ValueType, unsigned AddressSpace) {
|
|
assert(ValueType && "Can't get a pointer to <null> type!");
|
|
assert(ValueType != Type::getVoidTy(ValueType->getContext()) &&
|
|
"Pointer to void is not valid, use i8* instead!");
|
|
assert(isValidElementType(ValueType) && "Invalid type for pointer element!");
|
|
PointerValType PVT(ValueType, AddressSpace);
|
|
|
|
PointerType *PT = 0;
|
|
|
|
LLVMContextImpl *pImpl = ValueType->getContext().pImpl;
|
|
|
|
sys::SmartScopedLock<true> L(pImpl->TypeMapLock);
|
|
PT = pImpl->PointerTypes.get(PVT);
|
|
|
|
if (!PT) {
|
|
// Value not found. Derive a new type!
|
|
pImpl->PointerTypes.add(PVT, PT = new PointerType(ValueType, AddressSpace));
|
|
}
|
|
#ifdef DEBUG_MERGE_TYPES
|
|
DEBUG(errs() << "Derived new type: " << *PT << "\n");
|
|
#endif
|
|
return PT;
|
|
}
|
|
|
|
PointerType *Type::getPointerTo(unsigned addrs) const {
|
|
return PointerType::get(this, addrs);
|
|
}
|
|
|
|
bool PointerType::isValidElementType(const Type *ElemTy) {
|
|
if (ElemTy == Type::getVoidTy(ElemTy->getContext()) ||
|
|
ElemTy == Type::getLabelTy(ElemTy->getContext()))
|
|
return false;
|
|
|
|
if (const PointerType *PTy = dyn_cast<PointerType>(ElemTy))
|
|
if (PTy->getElementType() == Type::getMetadataTy(ElemTy->getContext()))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Derived Type Refinement Functions
|
|
//===----------------------------------------------------------------------===//
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// addAbstractTypeUser - Notify an abstract type that there is a new user of
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// it. This function is called primarily by the PATypeHandle class.
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void Type::addAbstractTypeUser(AbstractTypeUser *U) const {
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assert(isAbstract() && "addAbstractTypeUser: Current type not abstract!");
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LLVMContextImpl *pImpl = getContext().pImpl;
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pImpl->AbstractTypeUsersLock.acquire();
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AbstractTypeUsers.push_back(U);
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pImpl->AbstractTypeUsersLock.release();
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}
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// removeAbstractTypeUser - Notify an abstract type that a user of the class
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// no longer has a handle to the type. This function is called primarily by
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// the PATypeHandle class. When there are no users of the abstract type, it
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// is annihilated, because there is no way to get a reference to it ever again.
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//
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void Type::removeAbstractTypeUser(AbstractTypeUser *U) const {
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LLVMContextImpl *pImpl = getContext().pImpl;
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pImpl->AbstractTypeUsersLock.acquire();
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// Search from back to front because we will notify users from back to
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// front. Also, it is likely that there will be a stack like behavior to
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// users that register and unregister users.
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//
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unsigned i;
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for (i = AbstractTypeUsers.size(); AbstractTypeUsers[i-1] != U; --i)
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assert(i != 0 && "AbstractTypeUser not in user list!");
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--i; // Convert to be in range 0 <= i < size()
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assert(i < AbstractTypeUsers.size() && "Index out of range!"); // Wraparound?
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AbstractTypeUsers.erase(AbstractTypeUsers.begin()+i);
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#ifdef DEBUG_MERGE_TYPES
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DEBUG(errs() << " remAbstractTypeUser[" << (void*)this << ", "
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<< *this << "][" << i << "] User = " << U << "\n");
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#endif
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if (AbstractTypeUsers.empty() && getRefCount() == 0 && isAbstract()) {
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#ifdef DEBUG_MERGE_TYPES
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DEBUG(errs() << "DELETEing unused abstract type: <" << *this
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<< ">[" << (void*)this << "]" << "\n");
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#endif
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this->destroy();
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}
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pImpl->AbstractTypeUsersLock.release();
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}
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// unlockedRefineAbstractTypeTo - This function is used when it is discovered
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// that the 'this' abstract type is actually equivalent to the NewType
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// specified. This causes all users of 'this' to switch to reference the more
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// concrete type NewType and for 'this' to be deleted. Only used for internal
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// callers.
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//
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void DerivedType::unlockedRefineAbstractTypeTo(const Type *NewType) {
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assert(isAbstract() && "refineAbstractTypeTo: Current type is not abstract!");
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assert(this != NewType && "Can't refine to myself!");
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assert(ForwardType == 0 && "This type has already been refined!");
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LLVMContextImpl *pImpl = getContext().pImpl;
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// The descriptions may be out of date. Conservatively clear them all!
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pImpl->AbstractTypeDescriptions.clear();
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#ifdef DEBUG_MERGE_TYPES
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DEBUG(errs() << "REFINING abstract type [" << (void*)this << " "
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<< *this << "] to [" << (void*)NewType << " "
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<< *NewType << "]!\n");
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#endif
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// Make sure to put the type to be refined to into a holder so that if IT gets
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// refined, that we will not continue using a dead reference...
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//
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PATypeHolder NewTy(NewType);
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// Any PATypeHolders referring to this type will now automatically forward o
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// the type we are resolved to.
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ForwardType = NewType;
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if (NewType->isAbstract())
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cast<DerivedType>(NewType)->addRef();
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// Add a self use of the current type so that we don't delete ourself until
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// after the function exits.
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//
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PATypeHolder CurrentTy(this);
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// To make the situation simpler, we ask the subclass to remove this type from
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// the type map, and to replace any type uses with uses of non-abstract types.
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// This dramatically limits the amount of recursive type trouble we can find
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// ourselves in.
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dropAllTypeUses();
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// Iterate over all of the uses of this type, invoking callback. Each user
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// should remove itself from our use list automatically. We have to check to
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// make sure that NewTy doesn't _become_ 'this'. If it does, resolving types
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// will not cause users to drop off of the use list. If we resolve to ourself
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// we succeed!
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//
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pImpl->AbstractTypeUsersLock.acquire();
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while (!AbstractTypeUsers.empty() && NewTy != this) {
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AbstractTypeUser *User = AbstractTypeUsers.back();
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unsigned OldSize = AbstractTypeUsers.size(); OldSize=OldSize;
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#ifdef DEBUG_MERGE_TYPES
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DEBUG(errs() << " REFINING user " << OldSize-1 << "[" << (void*)User
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<< "] of abstract type [" << (void*)this << " "
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<< *this << "] to [" << (void*)NewTy.get() << " "
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<< *NewTy << "]!\n");
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#endif
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User->refineAbstractType(this, NewTy);
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assert(AbstractTypeUsers.size() != OldSize &&
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"AbsTyUser did not remove self from user list!");
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}
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pImpl->AbstractTypeUsersLock.release();
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// If we were successful removing all users from the type, 'this' will be
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// deleted when the last PATypeHolder is destroyed or updated from this type.
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// This may occur on exit of this function, as the CurrentTy object is
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// destroyed.
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}
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// refineAbstractTypeTo - This function is used by external callers to notify
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// us that this abstract type is equivalent to another type.
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//
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void DerivedType::refineAbstractTypeTo(const Type *NewType) {
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// All recursive calls will go through unlockedRefineAbstractTypeTo,
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// to avoid deadlock problems.
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sys::SmartScopedLock<true> L(NewType->getContext().pImpl->TypeMapLock);
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unlockedRefineAbstractTypeTo(NewType);
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}
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// notifyUsesThatTypeBecameConcrete - Notify AbstractTypeUsers of this type that
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// the current type has transitioned from being abstract to being concrete.
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//
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void DerivedType::notifyUsesThatTypeBecameConcrete() {
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#ifdef DEBUG_MERGE_TYPES
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DEBUG(errs() << "typeIsREFINED type: " << (void*)this << " " << *this <<"\n");
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#endif
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LLVMContextImpl *pImpl = getContext().pImpl;
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pImpl->AbstractTypeUsersLock.acquire();
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unsigned OldSize = AbstractTypeUsers.size(); OldSize=OldSize;
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while (!AbstractTypeUsers.empty()) {
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AbstractTypeUser *ATU = AbstractTypeUsers.back();
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ATU->typeBecameConcrete(this);
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assert(AbstractTypeUsers.size() < OldSize-- &&
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"AbstractTypeUser did not remove itself from the use list!");
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}
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pImpl->AbstractTypeUsersLock.release();
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}
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// refineAbstractType - Called when a contained type is found to be more
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// concrete - this could potentially change us from an abstract type to a
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// concrete type.
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//
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void FunctionType::refineAbstractType(const DerivedType *OldType,
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const Type *NewType) {
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LLVMContextImpl *pImpl = OldType->getContext().pImpl;
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pImpl->FunctionTypes.RefineAbstractType(this, OldType, NewType);
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}
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void FunctionType::typeBecameConcrete(const DerivedType *AbsTy) {
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LLVMContextImpl *pImpl = AbsTy->getContext().pImpl;
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pImpl->FunctionTypes.TypeBecameConcrete(this, AbsTy);
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}
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// refineAbstractType - Called when a contained type is found to be more
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// concrete - this could potentially change us from an abstract type to a
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// concrete type.
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//
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void ArrayType::refineAbstractType(const DerivedType *OldType,
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const Type *NewType) {
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LLVMContextImpl *pImpl = OldType->getContext().pImpl;
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pImpl->ArrayTypes.RefineAbstractType(this, OldType, NewType);
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}
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void ArrayType::typeBecameConcrete(const DerivedType *AbsTy) {
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LLVMContextImpl *pImpl = AbsTy->getContext().pImpl;
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pImpl->ArrayTypes.TypeBecameConcrete(this, AbsTy);
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}
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// refineAbstractType - Called when a contained type is found to be more
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// concrete - this could potentially change us from an abstract type to a
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// concrete type.
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//
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void VectorType::refineAbstractType(const DerivedType *OldType,
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const Type *NewType) {
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LLVMContextImpl *pImpl = OldType->getContext().pImpl;
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pImpl->VectorTypes.RefineAbstractType(this, OldType, NewType);
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}
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void VectorType::typeBecameConcrete(const DerivedType *AbsTy) {
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LLVMContextImpl *pImpl = AbsTy->getContext().pImpl;
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pImpl->VectorTypes.TypeBecameConcrete(this, AbsTy);
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}
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// refineAbstractType - Called when a contained type is found to be more
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// concrete - this could potentially change us from an abstract type to a
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// concrete type.
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//
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void StructType::refineAbstractType(const DerivedType *OldType,
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const Type *NewType) {
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LLVMContextImpl *pImpl = OldType->getContext().pImpl;
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pImpl->StructTypes.RefineAbstractType(this, OldType, NewType);
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}
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void StructType::typeBecameConcrete(const DerivedType *AbsTy) {
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LLVMContextImpl *pImpl = AbsTy->getContext().pImpl;
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pImpl->StructTypes.TypeBecameConcrete(this, AbsTy);
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}
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// refineAbstractType - Called when a contained type is found to be more
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// concrete - this could potentially change us from an abstract type to a
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// concrete type.
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//
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void PointerType::refineAbstractType(const DerivedType *OldType,
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const Type *NewType) {
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LLVMContextImpl *pImpl = OldType->getContext().pImpl;
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pImpl->PointerTypes.RefineAbstractType(this, OldType, NewType);
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}
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void PointerType::typeBecameConcrete(const DerivedType *AbsTy) {
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LLVMContextImpl *pImpl = AbsTy->getContext().pImpl;
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pImpl->PointerTypes.TypeBecameConcrete(this, AbsTy);
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}
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bool SequentialType::indexValid(const Value *V) const {
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if (isa<IntegerType>(V->getType()))
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return true;
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return false;
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}
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namespace llvm {
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raw_ostream &operator<<(raw_ostream &OS, const Type &T) {
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T.print(OS);
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return OS;
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}
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}
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