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https://github.com/c64scene-ar/llvm-6502.git
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c449a224bb
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122809 91177308-0d34-0410-b5e6-96231b3b80d8
914 lines
38 KiB
C++
914 lines
38 KiB
C++
//===-- llvm/InstrTypes.h - Important Instruction subclasses ----*- C++ -*-===//
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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 meta classes of instructions that exist in the VM
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// representation. Specific concrete subclasses of these may be found in the
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// i*.h files...
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_INSTRUCTION_TYPES_H
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#define LLVM_INSTRUCTION_TYPES_H
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#include "llvm/Instruction.h"
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#include "llvm/OperandTraits.h"
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#include "llvm/Operator.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/ADT/Twine.h"
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namespace llvm {
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class LLVMContext;
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//===----------------------------------------------------------------------===//
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// TerminatorInst Class
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//===----------------------------------------------------------------------===//
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/// TerminatorInst - Subclasses of this class are all able to terminate a basic
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/// block. Thus, these are all the flow control type of operations.
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///
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class TerminatorInst : public Instruction {
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protected:
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TerminatorInst(const Type *Ty, Instruction::TermOps iType,
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Use *Ops, unsigned NumOps,
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Instruction *InsertBefore = 0)
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: Instruction(Ty, iType, Ops, NumOps, InsertBefore) {}
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TerminatorInst(const Type *Ty, Instruction::TermOps iType,
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Use *Ops, unsigned NumOps, BasicBlock *InsertAtEnd)
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: Instruction(Ty, iType, Ops, NumOps, InsertAtEnd) {}
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// Out of line virtual method, so the vtable, etc has a home.
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~TerminatorInst();
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/// Virtual methods - Terminators should overload these and provide inline
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/// overrides of non-V methods.
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virtual BasicBlock *getSuccessorV(unsigned idx) const = 0;
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virtual unsigned getNumSuccessorsV() const = 0;
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virtual void setSuccessorV(unsigned idx, BasicBlock *B) = 0;
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virtual TerminatorInst *clone_impl() const = 0;
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public:
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/// getNumSuccessors - Return the number of successors that this terminator
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/// has.
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unsigned getNumSuccessors() const {
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return getNumSuccessorsV();
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}
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/// getSuccessor - Return the specified successor.
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///
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BasicBlock *getSuccessor(unsigned idx) const {
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return getSuccessorV(idx);
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}
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/// setSuccessor - Update the specified successor to point at the provided
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/// block.
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void setSuccessor(unsigned idx, BasicBlock *B) {
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setSuccessorV(idx, B);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const TerminatorInst *) { return true; }
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static inline bool classof(const Instruction *I) {
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return I->isTerminator();
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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}
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};
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//===----------------------------------------------------------------------===//
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// UnaryInstruction Class
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//===----------------------------------------------------------------------===//
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class UnaryInstruction : public Instruction {
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void *operator new(size_t, unsigned); // Do not implement
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protected:
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UnaryInstruction(const Type *Ty, unsigned iType, Value *V,
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Instruction *IB = 0)
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: Instruction(Ty, iType, &Op<0>(), 1, IB) {
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Op<0>() = V;
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}
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UnaryInstruction(const Type *Ty, unsigned iType, Value *V, BasicBlock *IAE)
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: Instruction(Ty, iType, &Op<0>(), 1, IAE) {
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Op<0>() = V;
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}
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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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// Out of line virtual method, so the vtable, etc has a home.
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~UnaryInstruction();
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const UnaryInstruction *) { return true; }
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static inline bool classof(const Instruction *I) {
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return I->getOpcode() == Instruction::Alloca ||
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I->getOpcode() == Instruction::Load ||
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I->getOpcode() == Instruction::VAArg ||
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I->getOpcode() == Instruction::ExtractValue ||
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(I->getOpcode() >= CastOpsBegin && I->getOpcode() < CastOpsEnd);
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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}
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};
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template <>
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struct OperandTraits<UnaryInstruction> : public FixedNumOperandTraits<1> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(UnaryInstruction, Value)
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//===----------------------------------------------------------------------===//
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// BinaryOperator Class
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//===----------------------------------------------------------------------===//
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class BinaryOperator : public Instruction {
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void *operator new(size_t, unsigned); // Do not implement
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protected:
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void init(BinaryOps iType);
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BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
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const Twine &Name, Instruction *InsertBefore);
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BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
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const Twine &Name, BasicBlock *InsertAtEnd);
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virtual BinaryOperator *clone_impl() const;
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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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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
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/// Create() - Construct a binary instruction, given the opcode and the two
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/// operands. Optionally (if InstBefore is specified) insert the instruction
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/// into a BasicBlock right before the specified instruction. The specified
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/// Instruction is allowed to be a dereferenced end iterator.
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///
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static BinaryOperator *Create(BinaryOps Op, Value *S1, Value *S2,
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const Twine &Name = Twine(),
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Instruction *InsertBefore = 0);
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/// Create() - Construct a binary instruction, given the opcode and the two
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/// operands. Also automatically insert this instruction to the end of the
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/// BasicBlock specified.
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///
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static BinaryOperator *Create(BinaryOps Op, Value *S1, Value *S2,
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const Twine &Name, BasicBlock *InsertAtEnd);
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/// Create* - These methods just forward to Create, and are useful when you
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/// statically know what type of instruction you're going to create. These
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/// helpers just save some typing.
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#define HANDLE_BINARY_INST(N, OPC, CLASS) \
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static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
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const Twine &Name = "") {\
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return Create(Instruction::OPC, V1, V2, Name);\
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}
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#include "llvm/Instruction.def"
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#define HANDLE_BINARY_INST(N, OPC, CLASS) \
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static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
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const Twine &Name, BasicBlock *BB) {\
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return Create(Instruction::OPC, V1, V2, Name, BB);\
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}
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#include "llvm/Instruction.def"
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#define HANDLE_BINARY_INST(N, OPC, CLASS) \
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static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
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const Twine &Name, Instruction *I) {\
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return Create(Instruction::OPC, V1, V2, Name, I);\
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}
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#include "llvm/Instruction.def"
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/// CreateNSWAdd - Create an Add operator with the NSW flag set.
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///
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static BinaryOperator *CreateNSWAdd(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateAdd(V1, V2, Name);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNSWAdd(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateAdd(V1, V2, Name, BB);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNSWAdd(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateAdd(V1, V2, Name, I);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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/// CreateNUWAdd - Create an Add operator with the NUW flag set.
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///
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static BinaryOperator *CreateNUWAdd(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateAdd(V1, V2, Name);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNUWAdd(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateAdd(V1, V2, Name, BB);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNUWAdd(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateAdd(V1, V2, Name, I);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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/// CreateNSWSub - Create an Sub operator with the NSW flag set.
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///
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static BinaryOperator *CreateNSWSub(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateSub(V1, V2, Name);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNSWSub(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateSub(V1, V2, Name, BB);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNSWSub(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateSub(V1, V2, Name, I);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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/// CreateNUWSub - Create an Sub operator with the NUW flag set.
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///
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static BinaryOperator *CreateNUWSub(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateSub(V1, V2, Name);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNUWSub(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateSub(V1, V2, Name, BB);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNUWSub(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateSub(V1, V2, Name, I);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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/// CreateNSWMul - Create a Mul operator with the NSW flag set.
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///
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static BinaryOperator *CreateNSWMul(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateMul(V1, V2, Name);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNSWMul(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateMul(V1, V2, Name, BB);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNSWMul(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateMul(V1, V2, Name, I);
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BO->setHasNoSignedWrap(true);
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return BO;
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}
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/// CreateNUWMul - Create a Mul operator with the NUW flag set.
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///
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static BinaryOperator *CreateNUWMul(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateMul(V1, V2, Name);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNUWMul(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateMul(V1, V2, Name, BB);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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static BinaryOperator *CreateNUWMul(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateMul(V1, V2, Name, I);
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BO->setHasNoUnsignedWrap(true);
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return BO;
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}
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/// CreateExactSDiv - Create an SDiv operator with the exact flag set.
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///
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static BinaryOperator *CreateExactSDiv(Value *V1, Value *V2,
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const Twine &Name = "") {
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BinaryOperator *BO = CreateSDiv(V1, V2, Name);
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BO->setIsExact(true);
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return BO;
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}
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static BinaryOperator *CreateExactSDiv(Value *V1, Value *V2,
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const Twine &Name, BasicBlock *BB) {
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BinaryOperator *BO = CreateSDiv(V1, V2, Name, BB);
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BO->setIsExact(true);
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return BO;
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}
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static BinaryOperator *CreateExactSDiv(Value *V1, Value *V2,
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const Twine &Name, Instruction *I) {
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BinaryOperator *BO = CreateSDiv(V1, V2, Name, I);
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BO->setIsExact(true);
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return BO;
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}
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/// Helper functions to construct and inspect unary operations (NEG and NOT)
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/// via binary operators SUB and XOR:
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///
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/// CreateNeg, CreateNot - Create the NEG and NOT
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/// instructions out of SUB and XOR instructions.
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///
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static BinaryOperator *CreateNeg(Value *Op, const Twine &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *CreateNeg(Value *Op, const Twine &Name,
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BasicBlock *InsertAtEnd);
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static BinaryOperator *CreateNSWNeg(Value *Op, const Twine &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *CreateNSWNeg(Value *Op, const Twine &Name,
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BasicBlock *InsertAtEnd);
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static BinaryOperator *CreateNUWNeg(Value *Op, const Twine &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *CreateNUWNeg(Value *Op, const Twine &Name,
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BasicBlock *InsertAtEnd);
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static BinaryOperator *CreateFNeg(Value *Op, const Twine &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *CreateFNeg(Value *Op, const Twine &Name,
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BasicBlock *InsertAtEnd);
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static BinaryOperator *CreateNot(Value *Op, const Twine &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *CreateNot(Value *Op, const Twine &Name,
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BasicBlock *InsertAtEnd);
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/// isNeg, isFNeg, isNot - Check if the given Value is a
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/// NEG, FNeg, or NOT instruction.
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///
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static bool isNeg(const Value *V);
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static bool isFNeg(const Value *V);
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static bool isNot(const Value *V);
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/// getNegArgument, getNotArgument - Helper functions to extract the
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/// unary argument of a NEG, FNEG or NOT operation implemented via
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/// Sub, FSub, or Xor.
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///
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static const Value *getNegArgument(const Value *BinOp);
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static Value *getNegArgument( Value *BinOp);
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static const Value *getFNegArgument(const Value *BinOp);
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static Value *getFNegArgument( Value *BinOp);
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static const Value *getNotArgument(const Value *BinOp);
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static Value *getNotArgument( Value *BinOp);
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BinaryOps getOpcode() const {
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return static_cast<BinaryOps>(Instruction::getOpcode());
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}
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/// swapOperands - Exchange the two operands to this instruction.
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/// This instruction is safe to use on any binary instruction and
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/// does not modify the semantics of the instruction. If the instruction
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/// cannot be reversed (ie, it's a Div), then return true.
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///
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bool swapOperands();
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/// setHasNoUnsignedWrap - Set or clear the nsw flag on this instruction,
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/// which must be an operator which supports this flag. See LangRef.html
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/// for the meaning of this flag.
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void setHasNoUnsignedWrap(bool b = true);
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/// setHasNoSignedWrap - Set or clear the nsw flag on this instruction,
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/// which must be an operator which supports this flag. See LangRef.html
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/// for the meaning of this flag.
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void setHasNoSignedWrap(bool b = true);
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/// setIsExact - Set or clear the exact flag on this instruction,
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/// which must be an operator which supports this flag. See LangRef.html
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/// for the meaning of this flag.
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void setIsExact(bool b = true);
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/// hasNoUnsignedWrap - Determine whether the no unsigned wrap flag is set.
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bool hasNoUnsignedWrap() const;
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/// hasNoSignedWrap - Determine whether the no signed wrap flag is set.
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bool hasNoSignedWrap() const;
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/// isExact - Determine whether the exact flag is set.
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bool isExact() const;
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const BinaryOperator *) { return true; }
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static inline bool classof(const Instruction *I) {
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return I->isBinaryOp();
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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}
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};
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template <>
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struct OperandTraits<BinaryOperator> : public FixedNumOperandTraits<2> {
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};
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DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BinaryOperator, Value)
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|
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//===----------------------------------------------------------------------===//
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// CastInst Class
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//===----------------------------------------------------------------------===//
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|
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/// CastInst - This is the base class for all instructions that perform data
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/// casts. It is simply provided so that instruction category testing
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/// can be performed with code like:
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///
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/// if (isa<CastInst>(Instr)) { ... }
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/// @brief Base class of casting instructions.
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class CastInst : public UnaryInstruction {
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protected:
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/// @brief Constructor with insert-before-instruction semantics for subclasses
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CastInst(const Type *Ty, unsigned iType, Value *S,
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const Twine &NameStr = "", Instruction *InsertBefore = 0)
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: UnaryInstruction(Ty, iType, S, InsertBefore) {
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setName(NameStr);
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}
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/// @brief Constructor with insert-at-end-of-block semantics for subclasses
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CastInst(const Type *Ty, unsigned iType, Value *S,
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const Twine &NameStr, BasicBlock *InsertAtEnd)
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: UnaryInstruction(Ty, iType, S, InsertAtEnd) {
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setName(NameStr);
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}
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public:
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/// Provides a way to construct any of the CastInst subclasses using an
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/// opcode instead of the subclass's constructor. The opcode must be in the
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/// CastOps category (Instruction::isCast(opcode) returns true). This
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/// constructor has insert-before-instruction semantics to automatically
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/// insert the new CastInst before InsertBefore (if it is non-null).
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/// @brief Construct any of the CastInst subclasses
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static CastInst *Create(
|
|
Instruction::CastOps, ///< The opcode of the cast instruction
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which cast should be made
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
/// Provides a way to construct any of the CastInst subclasses using an
|
|
/// opcode instead of the subclass's constructor. The opcode must be in the
|
|
/// CastOps category. This constructor has insert-at-end-of-block semantics
|
|
/// to automatically insert the new CastInst at the end of InsertAtEnd (if
|
|
/// its non-null).
|
|
/// @brief Construct any of the CastInst subclasses
|
|
static CastInst *Create(
|
|
Instruction::CastOps, ///< The opcode for the cast instruction
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which operand is casted
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Create a ZExt or BitCast cast instruction
|
|
static CastInst *CreateZExtOrBitCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which cast should be made
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
|
|
/// @brief Create a ZExt or BitCast cast instruction
|
|
static CastInst *CreateZExtOrBitCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which operand is casted
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Create a SExt or BitCast cast instruction
|
|
static CastInst *CreateSExtOrBitCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which cast should be made
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
|
|
/// @brief Create a SExt or BitCast cast instruction
|
|
static CastInst *CreateSExtOrBitCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which operand is casted
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Create a BitCast or a PtrToInt cast instruction
|
|
static CastInst *CreatePointerCast(
|
|
Value *S, ///< The pointer value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which operand is casted
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Create a BitCast or a PtrToInt cast instruction
|
|
static CastInst *CreatePointerCast(
|
|
Value *S, ///< The pointer value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which cast should be made
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
|
|
/// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
|
|
static CastInst *CreateIntegerCast(
|
|
Value *S, ///< The pointer value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which cast should be made
|
|
bool isSigned, ///< Whether to regard S as signed or not
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
|
|
/// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
|
|
static CastInst *CreateIntegerCast(
|
|
Value *S, ///< The integer value to be casted (operand 0)
|
|
const Type *Ty, ///< The integer type to which operand is casted
|
|
bool isSigned, ///< Whether to regard S as signed or not
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
|
|
static CastInst *CreateFPCast(
|
|
Value *S, ///< The floating point value to be casted
|
|
const Type *Ty, ///< The floating point type to cast to
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
|
|
/// @brief Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
|
|
static CastInst *CreateFPCast(
|
|
Value *S, ///< The floating point value to be casted
|
|
const Type *Ty, ///< The floating point type to cast to
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Create a Trunc or BitCast cast instruction
|
|
static CastInst *CreateTruncOrBitCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which cast should be made
|
|
const Twine &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the instruction
|
|
);
|
|
|
|
/// @brief Create a Trunc or BitCast cast instruction
|
|
static CastInst *CreateTruncOrBitCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< The type to which operand is casted
|
|
const Twine &Name, ///< The name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// @brief Check whether it is valid to call getCastOpcode for these types.
|
|
static bool isCastable(
|
|
const Type *SrcTy, ///< The Type from which the value should be cast.
|
|
const Type *DestTy ///< The Type to which the value should be cast.
|
|
);
|
|
|
|
/// Returns the opcode necessary to cast Val into Ty using usual casting
|
|
/// rules.
|
|
/// @brief Infer the opcode for cast operand and type
|
|
static Instruction::CastOps getCastOpcode(
|
|
const Value *Val, ///< The value to cast
|
|
bool SrcIsSigned, ///< Whether to treat the source as signed
|
|
const Type *Ty, ///< The Type to which the value should be casted
|
|
bool DstIsSigned ///< Whether to treate the dest. as signed
|
|
);
|
|
|
|
/// There are several places where we need to know if a cast instruction
|
|
/// only deals with integer source and destination types. To simplify that
|
|
/// logic, this method is provided.
|
|
/// @returns true iff the cast has only integral typed operand and dest type.
|
|
/// @brief Determine if this is an integer-only cast.
|
|
bool isIntegerCast() const;
|
|
|
|
/// A lossless cast is one that does not alter the basic value. It implies
|
|
/// a no-op cast but is more stringent, preventing things like int->float,
|
|
/// long->double, or int->ptr.
|
|
/// @returns true iff the cast is lossless.
|
|
/// @brief Determine if this is a lossless cast.
|
|
bool isLosslessCast() const;
|
|
|
|
/// A no-op cast is one that can be effected without changing any bits.
|
|
/// It implies that the source and destination types are the same size. The
|
|
/// IntPtrTy argument is used to make accurate determinations for casts
|
|
/// involving Integer and Pointer types. They are no-op casts if the integer
|
|
/// is the same size as the pointer. However, pointer size varies with
|
|
/// platform. Generally, the result of TargetData::getIntPtrType() should be
|
|
/// passed in. If that's not available, use Type::Int64Ty, which will make
|
|
/// the isNoopCast call conservative.
|
|
/// @brief Determine if the described cast is a no-op cast.
|
|
static bool isNoopCast(
|
|
Instruction::CastOps Opcode, ///< Opcode of cast
|
|
const Type *SrcTy, ///< SrcTy of cast
|
|
const Type *DstTy, ///< DstTy of cast
|
|
const Type *IntPtrTy ///< Integer type corresponding to Ptr types, or null
|
|
);
|
|
|
|
/// @brief Determine if this cast is a no-op cast.
|
|
bool isNoopCast(
|
|
const Type *IntPtrTy ///< Integer type corresponding to pointer
|
|
) const;
|
|
|
|
/// Determine how a pair of casts can be eliminated, if they can be at all.
|
|
/// This is a helper function for both CastInst and ConstantExpr.
|
|
/// @returns 0 if the CastInst pair can't be eliminated
|
|
/// @returns Instruction::CastOps value for a cast that can replace
|
|
/// the pair, casting SrcTy to DstTy.
|
|
/// @brief Determine if a cast pair is eliminable
|
|
static unsigned isEliminableCastPair(
|
|
Instruction::CastOps firstOpcode, ///< Opcode of first cast
|
|
Instruction::CastOps secondOpcode, ///< Opcode of second cast
|
|
const Type *SrcTy, ///< SrcTy of 1st cast
|
|
const Type *MidTy, ///< DstTy of 1st cast & SrcTy of 2nd cast
|
|
const Type *DstTy, ///< DstTy of 2nd cast
|
|
const Type *IntPtrTy ///< Integer type corresponding to Ptr types, or null
|
|
);
|
|
|
|
/// @brief Return the opcode of this CastInst
|
|
Instruction::CastOps getOpcode() const {
|
|
return Instruction::CastOps(Instruction::getOpcode());
|
|
}
|
|
|
|
/// @brief Return the source type, as a convenience
|
|
const Type* getSrcTy() const { return getOperand(0)->getType(); }
|
|
/// @brief Return the destination type, as a convenience
|
|
const Type* getDestTy() const { return getType(); }
|
|
|
|
/// This method can be used to determine if a cast from S to DstTy using
|
|
/// Opcode op is valid or not.
|
|
/// @returns true iff the proposed cast is valid.
|
|
/// @brief Determine if a cast is valid without creating one.
|
|
static bool castIsValid(Instruction::CastOps op, Value *S, const Type *DstTy);
|
|
|
|
/// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const CastInst *) { return true; }
|
|
static inline bool classof(const Instruction *I) {
|
|
return I->isCast();
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return isa<Instruction>(V) && classof(cast<Instruction>(V));
|
|
}
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// CmpInst Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// This class is the base class for the comparison instructions.
|
|
/// @brief Abstract base class of comparison instructions.
|
|
class CmpInst : public Instruction {
|
|
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
|
|
CmpInst(); // do not implement
|
|
protected:
|
|
CmpInst(const Type *ty, Instruction::OtherOps op, unsigned short pred,
|
|
Value *LHS, Value *RHS, const Twine &Name = "",
|
|
Instruction *InsertBefore = 0);
|
|
|
|
CmpInst(const Type *ty, Instruction::OtherOps op, unsigned short pred,
|
|
Value *LHS, Value *RHS, const Twine &Name,
|
|
BasicBlock *InsertAtEnd);
|
|
|
|
virtual void Anchor() const; // Out of line virtual method.
|
|
public:
|
|
/// This enumeration lists the possible predicates for CmpInst subclasses.
|
|
/// Values in the range 0-31 are reserved for FCmpInst, while values in the
|
|
/// range 32-64 are reserved for ICmpInst. This is necessary to ensure the
|
|
/// predicate values are not overlapping between the classes.
|
|
enum Predicate {
|
|
// Opcode U L G E Intuitive operation
|
|
FCMP_FALSE = 0, ///< 0 0 0 0 Always false (always folded)
|
|
FCMP_OEQ = 1, ///< 0 0 0 1 True if ordered and equal
|
|
FCMP_OGT = 2, ///< 0 0 1 0 True if ordered and greater than
|
|
FCMP_OGE = 3, ///< 0 0 1 1 True if ordered and greater than or equal
|
|
FCMP_OLT = 4, ///< 0 1 0 0 True if ordered and less than
|
|
FCMP_OLE = 5, ///< 0 1 0 1 True if ordered and less than or equal
|
|
FCMP_ONE = 6, ///< 0 1 1 0 True if ordered and operands are unequal
|
|
FCMP_ORD = 7, ///< 0 1 1 1 True if ordered (no nans)
|
|
FCMP_UNO = 8, ///< 1 0 0 0 True if unordered: isnan(X) | isnan(Y)
|
|
FCMP_UEQ = 9, ///< 1 0 0 1 True if unordered or equal
|
|
FCMP_UGT = 10, ///< 1 0 1 0 True if unordered or greater than
|
|
FCMP_UGE = 11, ///< 1 0 1 1 True if unordered, greater than, or equal
|
|
FCMP_ULT = 12, ///< 1 1 0 0 True if unordered or less than
|
|
FCMP_ULE = 13, ///< 1 1 0 1 True if unordered, less than, or equal
|
|
FCMP_UNE = 14, ///< 1 1 1 0 True if unordered or not equal
|
|
FCMP_TRUE = 15, ///< 1 1 1 1 Always true (always folded)
|
|
FIRST_FCMP_PREDICATE = FCMP_FALSE,
|
|
LAST_FCMP_PREDICATE = FCMP_TRUE,
|
|
BAD_FCMP_PREDICATE = FCMP_TRUE + 1,
|
|
ICMP_EQ = 32, ///< equal
|
|
ICMP_NE = 33, ///< not equal
|
|
ICMP_UGT = 34, ///< unsigned greater than
|
|
ICMP_UGE = 35, ///< unsigned greater or equal
|
|
ICMP_ULT = 36, ///< unsigned less than
|
|
ICMP_ULE = 37, ///< unsigned less or equal
|
|
ICMP_SGT = 38, ///< signed greater than
|
|
ICMP_SGE = 39, ///< signed greater or equal
|
|
ICMP_SLT = 40, ///< signed less than
|
|
ICMP_SLE = 41, ///< signed less or equal
|
|
FIRST_ICMP_PREDICATE = ICMP_EQ,
|
|
LAST_ICMP_PREDICATE = ICMP_SLE,
|
|
BAD_ICMP_PREDICATE = ICMP_SLE + 1
|
|
};
|
|
|
|
// allocate space for exactly two operands
|
|
void *operator new(size_t s) {
|
|
return User::operator new(s, 2);
|
|
}
|
|
/// Construct a compare instruction, given the opcode, the predicate and
|
|
/// the two operands. Optionally (if InstBefore is specified) insert the
|
|
/// instruction into a BasicBlock right before the specified instruction.
|
|
/// The specified Instruction is allowed to be a dereferenced end iterator.
|
|
/// @brief Create a CmpInst
|
|
static CmpInst *Create(OtherOps Op,
|
|
unsigned short predicate, Value *S1,
|
|
Value *S2, const Twine &Name = "",
|
|
Instruction *InsertBefore = 0);
|
|
|
|
/// Construct a compare instruction, given the opcode, the predicate and the
|
|
/// two operands. Also automatically insert this instruction to the end of
|
|
/// the BasicBlock specified.
|
|
/// @brief Create a CmpInst
|
|
static CmpInst *Create(OtherOps Op, unsigned short predicate, Value *S1,
|
|
Value *S2, const Twine &Name, BasicBlock *InsertAtEnd);
|
|
|
|
/// @brief Get the opcode casted to the right type
|
|
OtherOps getOpcode() const {
|
|
return static_cast<OtherOps>(Instruction::getOpcode());
|
|
}
|
|
|
|
/// @brief Return the predicate for this instruction.
|
|
Predicate getPredicate() const {
|
|
return Predicate(getSubclassDataFromInstruction());
|
|
}
|
|
|
|
/// @brief Set the predicate for this instruction to the specified value.
|
|
void setPredicate(Predicate P) { setInstructionSubclassData(P); }
|
|
|
|
static bool isFPPredicate(Predicate P) {
|
|
return P >= FIRST_FCMP_PREDICATE && P <= LAST_FCMP_PREDICATE;
|
|
}
|
|
|
|
static bool isIntPredicate(Predicate P) {
|
|
return P >= FIRST_ICMP_PREDICATE && P <= LAST_ICMP_PREDICATE;
|
|
}
|
|
|
|
bool isFPPredicate() const { return isFPPredicate(getPredicate()); }
|
|
bool isIntPredicate() const { return isIntPredicate(getPredicate()); }
|
|
|
|
|
|
/// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
|
|
/// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
|
|
/// @returns the inverse predicate for the instruction's current predicate.
|
|
/// @brief Return the inverse of the instruction's predicate.
|
|
Predicate getInversePredicate() const {
|
|
return getInversePredicate(getPredicate());
|
|
}
|
|
|
|
/// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
|
|
/// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
|
|
/// @returns the inverse predicate for predicate provided in \p pred.
|
|
/// @brief Return the inverse of a given predicate
|
|
static Predicate getInversePredicate(Predicate pred);
|
|
|
|
/// For example, EQ->EQ, SLE->SGE, ULT->UGT,
|
|
/// OEQ->OEQ, ULE->UGE, OLT->OGT, etc.
|
|
/// @returns the predicate that would be the result of exchanging the two
|
|
/// operands of the CmpInst instruction without changing the result
|
|
/// produced.
|
|
/// @brief Return the predicate as if the operands were swapped
|
|
Predicate getSwappedPredicate() const {
|
|
return getSwappedPredicate(getPredicate());
|
|
}
|
|
|
|
/// This is a static version that you can use without an instruction
|
|
/// available.
|
|
/// @brief Return the predicate as if the operands were swapped.
|
|
static Predicate getSwappedPredicate(Predicate pred);
|
|
|
|
/// @brief Provide more efficient getOperand methods.
|
|
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
|
|
|
|
/// This is just a convenience that dispatches to the subclasses.
|
|
/// @brief Swap the operands and adjust predicate accordingly to retain
|
|
/// the same comparison.
|
|
void swapOperands();
|
|
|
|
/// This is just a convenience that dispatches to the subclasses.
|
|
/// @brief Determine if this CmpInst is commutative.
|
|
bool isCommutative() const;
|
|
|
|
/// This is just a convenience that dispatches to the subclasses.
|
|
/// @brief Determine if this is an equals/not equals predicate.
|
|
bool isEquality() const;
|
|
|
|
/// @returns true if the comparison is signed, false otherwise.
|
|
/// @brief Determine if this instruction is using a signed comparison.
|
|
bool isSigned() const {
|
|
return isSigned(getPredicate());
|
|
}
|
|
|
|
/// @returns true if the comparison is unsigned, false otherwise.
|
|
/// @brief Determine if this instruction is using an unsigned comparison.
|
|
bool isUnsigned() const {
|
|
return isUnsigned(getPredicate());
|
|
}
|
|
|
|
/// This is just a convenience.
|
|
/// @brief Determine if this is true when both operands are the same.
|
|
bool isTrueWhenEqual() const {
|
|
return isTrueWhenEqual(getPredicate());
|
|
}
|
|
|
|
/// This is just a convenience.
|
|
/// @brief Determine if this is false when both operands are the same.
|
|
bool isFalseWhenEqual() const {
|
|
return isFalseWhenEqual(getPredicate());
|
|
}
|
|
|
|
/// @returns true if the predicate is unsigned, false otherwise.
|
|
/// @brief Determine if the predicate is an unsigned operation.
|
|
static bool isUnsigned(unsigned short predicate);
|
|
|
|
/// @returns true if the predicate is signed, false otherwise.
|
|
/// @brief Determine if the predicate is an signed operation.
|
|
static bool isSigned(unsigned short predicate);
|
|
|
|
/// @brief Determine if the predicate is an ordered operation.
|
|
static bool isOrdered(unsigned short predicate);
|
|
|
|
/// @brief Determine if the predicate is an unordered operation.
|
|
static bool isUnordered(unsigned short predicate);
|
|
|
|
/// Determine if the predicate is true when comparing a value with itself.
|
|
static bool isTrueWhenEqual(unsigned short predicate);
|
|
|
|
/// Determine if the predicate is false when comparing a value with itself.
|
|
static bool isFalseWhenEqual(unsigned short predicate);
|
|
|
|
/// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const CmpInst *) { return true; }
|
|
static inline bool classof(const Instruction *I) {
|
|
return I->getOpcode() == Instruction::ICmp ||
|
|
I->getOpcode() == Instruction::FCmp;
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return isa<Instruction>(V) && classof(cast<Instruction>(V));
|
|
}
|
|
|
|
/// @brief Create a result type for fcmp/icmp
|
|
static const Type* makeCmpResultType(const Type* opnd_type) {
|
|
if (const VectorType* vt = dyn_cast<const VectorType>(opnd_type)) {
|
|
return VectorType::get(Type::getInt1Ty(opnd_type->getContext()),
|
|
vt->getNumElements());
|
|
}
|
|
return Type::getInt1Ty(opnd_type->getContext());
|
|
}
|
|
private:
|
|
// Shadow Value::setValueSubclassData with a private forwarding method so that
|
|
// subclasses cannot accidentally use it.
|
|
void setValueSubclassData(unsigned short D) {
|
|
Value::setValueSubclassData(D);
|
|
}
|
|
};
|
|
|
|
|
|
// FIXME: these are redundant if CmpInst < BinaryOperator
|
|
template <>
|
|
struct OperandTraits<CmpInst> : public FixedNumOperandTraits<2> {
|
|
};
|
|
|
|
DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CmpInst, Value)
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|