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The patch is generated using clang-tidy misc-use-override check. This command was used: tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py \ -checks='-*,misc-use-override' -header-filter='llvm|clang' \ -j=32 -fix -format http://reviews.llvm.org/D8925 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234679 91177308-0d34-0410-b5e6-96231b3b80d8
541 lines
20 KiB
C++
541 lines
20 KiB
C++
//===-- llvm/Instruction.h - Instruction class definition -------*- 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 contains the declaration of the Instruction class, which is the
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// base class for all of the LLVM instructions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_INSTRUCTION_H
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#define LLVM_IR_INSTRUCTION_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/ilist_node.h"
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#include "llvm/IR/DebugLoc.h"
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#include "llvm/IR/SymbolTableListTraits.h"
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#include "llvm/IR/User.h"
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namespace llvm {
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class FastMathFlags;
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class LLVMContext;
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class MDNode;
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class BasicBlock;
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struct AAMDNodes;
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template <>
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struct ilist_traits<Instruction>
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: public SymbolTableListTraits<Instruction, BasicBlock> {
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/// \brief Return a node that marks the end of a list.
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///
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/// The sentinel is relative to this instance, so we use a non-static
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/// method.
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Instruction *createSentinel() const;
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static void destroySentinel(Instruction *) {}
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Instruction *provideInitialHead() const { return createSentinel(); }
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Instruction *ensureHead(Instruction *) const { return createSentinel(); }
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static void noteHead(Instruction *, Instruction *) {}
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private:
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mutable ilist_half_node<Instruction> Sentinel;
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};
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class Instruction : public User, public ilist_node<Instruction> {
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void operator=(const Instruction &) = delete;
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Instruction(const Instruction &) = delete;
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BasicBlock *Parent;
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DebugLoc DbgLoc; // 'dbg' Metadata cache.
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enum {
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/// HasMetadataBit - This is a bit stored in the SubClassData field which
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/// indicates whether this instruction has metadata attached to it or not.
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HasMetadataBit = 1 << 15
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};
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public:
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// Out of line virtual method, so the vtable, etc has a home.
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~Instruction() override;
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/// user_back - Specialize the methods defined in Value, as we know that an
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/// instruction can only be used by other instructions.
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Instruction *user_back() { return cast<Instruction>(*user_begin());}
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const Instruction *user_back() const { return cast<Instruction>(*user_begin());}
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inline const BasicBlock *getParent() const { return Parent; }
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inline BasicBlock *getParent() { return Parent; }
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/// \brief Return the module owning the function this instruction belongs to
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/// or nullptr it the function does not have a module.
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///
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/// Note: this is undefined behavior if the instruction does not have a
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/// parent, or the parent basic block does not have a parent function.
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const Module *getModule() const;
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/// removeFromParent - This method unlinks 'this' from the containing basic
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/// block, but does not delete it.
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///
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void removeFromParent();
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/// eraseFromParent - This method unlinks 'this' from the containing basic
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/// block and deletes it.
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///
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/// \returns an iterator pointing to the element after the erased one
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iplist<Instruction>::iterator eraseFromParent();
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/// insertBefore - Insert an unlinked instructions into a basic block
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/// immediately before the specified instruction.
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void insertBefore(Instruction *InsertPos);
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/// insertAfter - Insert an unlinked instructions into a basic block
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/// immediately after the specified instruction.
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void insertAfter(Instruction *InsertPos);
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/// moveBefore - Unlink this instruction from its current basic block and
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/// insert it into the basic block that MovePos lives in, right before
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/// MovePos.
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void moveBefore(Instruction *MovePos);
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//===--------------------------------------------------------------------===//
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// Subclass classification.
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//===--------------------------------------------------------------------===//
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/// getOpcode() returns a member of one of the enums like Instruction::Add.
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unsigned getOpcode() const { return getValueID() - InstructionVal; }
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const char *getOpcodeName() const { return getOpcodeName(getOpcode()); }
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bool isTerminator() const { return isTerminator(getOpcode()); }
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bool isBinaryOp() const { return isBinaryOp(getOpcode()); }
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bool isShift() { return isShift(getOpcode()); }
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bool isCast() const { return isCast(getOpcode()); }
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static const char* getOpcodeName(unsigned OpCode);
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static inline bool isTerminator(unsigned OpCode) {
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return OpCode >= TermOpsBegin && OpCode < TermOpsEnd;
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}
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static inline bool isBinaryOp(unsigned Opcode) {
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return Opcode >= BinaryOpsBegin && Opcode < BinaryOpsEnd;
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}
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/// @brief Determine if the Opcode is one of the shift instructions.
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static inline bool isShift(unsigned Opcode) {
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return Opcode >= Shl && Opcode <= AShr;
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}
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/// isLogicalShift - Return true if this is a logical shift left or a logical
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/// shift right.
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inline bool isLogicalShift() const {
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return getOpcode() == Shl || getOpcode() == LShr;
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}
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/// isArithmeticShift - Return true if this is an arithmetic shift right.
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inline bool isArithmeticShift() const {
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return getOpcode() == AShr;
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}
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/// @brief Determine if the OpCode is one of the CastInst instructions.
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static inline bool isCast(unsigned OpCode) {
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return OpCode >= CastOpsBegin && OpCode < CastOpsEnd;
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}
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//===--------------------------------------------------------------------===//
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// Metadata manipulation.
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//===--------------------------------------------------------------------===//
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/// hasMetadata() - Return true if this instruction has any metadata attached
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/// to it.
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bool hasMetadata() const { return DbgLoc || hasMetadataHashEntry(); }
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/// hasMetadataOtherThanDebugLoc - Return true if this instruction has
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/// metadata attached to it other than a debug location.
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bool hasMetadataOtherThanDebugLoc() const {
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return hasMetadataHashEntry();
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}
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/// getMetadata - Get the metadata of given kind attached to this Instruction.
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/// If the metadata is not found then return null.
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MDNode *getMetadata(unsigned KindID) const {
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if (!hasMetadata()) return nullptr;
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return getMetadataImpl(KindID);
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}
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/// getMetadata - Get the metadata of given kind attached to this Instruction.
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/// If the metadata is not found then return null.
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MDNode *getMetadata(StringRef Kind) const {
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if (!hasMetadata()) return nullptr;
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return getMetadataImpl(Kind);
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}
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/// getAllMetadata - Get all metadata attached to this Instruction. The first
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/// element of each pair returned is the KindID, the second element is the
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/// metadata value. This list is returned sorted by the KindID.
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void
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getAllMetadata(SmallVectorImpl<std::pair<unsigned, MDNode *>> &MDs) const {
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if (hasMetadata())
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getAllMetadataImpl(MDs);
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}
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/// getAllMetadataOtherThanDebugLoc - This does the same thing as
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/// getAllMetadata, except that it filters out the debug location.
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void getAllMetadataOtherThanDebugLoc(
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SmallVectorImpl<std::pair<unsigned, MDNode *>> &MDs) const {
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if (hasMetadataOtherThanDebugLoc())
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getAllMetadataOtherThanDebugLocImpl(MDs);
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}
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/// getAAMetadata - Fills the AAMDNodes structure with AA metadata from
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/// this instruction. When Merge is true, the existing AA metadata is
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/// merged with that from this instruction providing the most-general result.
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void getAAMetadata(AAMDNodes &N, bool Merge = false) const;
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/// setMetadata - Set the metadata of the specified kind to the specified
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/// node. This updates/replaces metadata if already present, or removes it if
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/// Node is null.
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void setMetadata(unsigned KindID, MDNode *Node);
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void setMetadata(StringRef Kind, MDNode *Node);
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/// \brief Drop unknown metadata.
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/// Passes are required to drop metadata they don't understand. This is a
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/// convenience method for passes to do so.
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void dropUnknownMetadata(ArrayRef<unsigned> KnownIDs);
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void dropUnknownMetadata() {
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return dropUnknownMetadata(None);
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}
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void dropUnknownMetadata(unsigned ID1) {
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return dropUnknownMetadata(makeArrayRef(ID1));
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}
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void dropUnknownMetadata(unsigned ID1, unsigned ID2) {
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unsigned IDs[] = {ID1, ID2};
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return dropUnknownMetadata(IDs);
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}
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/// setAAMetadata - Sets the metadata on this instruction from the
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/// AAMDNodes structure.
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void setAAMetadata(const AAMDNodes &N);
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/// setDebugLoc - Set the debug location information for this instruction.
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void setDebugLoc(DebugLoc Loc) { DbgLoc = std::move(Loc); }
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/// getDebugLoc - Return the debug location for this node as a DebugLoc.
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const DebugLoc &getDebugLoc() const { return DbgLoc; }
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/// Set or clear the unsafe-algebra flag on this instruction, which must be an
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/// operator which supports this flag. See LangRef.html for the meaning of
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/// this flag.
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void setHasUnsafeAlgebra(bool B);
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/// Set or clear the no-nans flag on this instruction, which must be an
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/// operator which supports this flag. See LangRef.html for the meaning of
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/// this flag.
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void setHasNoNaNs(bool B);
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/// Set or clear the no-infs flag on this instruction, which must be an
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/// operator which supports this flag. See LangRef.html for the meaning of
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/// this flag.
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void setHasNoInfs(bool B);
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/// Set or clear the no-signed-zeros flag on this instruction, which must be
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/// an operator which supports this flag. See LangRef.html for the meaning of
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/// this flag.
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void setHasNoSignedZeros(bool B);
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/// Set or clear the allow-reciprocal flag on this instruction, which must be
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/// an operator which supports this flag. See LangRef.html for the meaning of
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/// this flag.
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void setHasAllowReciprocal(bool B);
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/// Convenience function for setting multiple fast-math flags on this
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/// instruction, which must be an operator which supports these flags. See
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/// LangRef.html for the meaning of these flags.
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void setFastMathFlags(FastMathFlags FMF);
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/// Convenience function for transferring all fast-math flag values to this
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/// instruction, which must be an operator which supports these flags. See
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/// LangRef.html for the meaning of these flags.
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void copyFastMathFlags(FastMathFlags FMF);
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/// Determine whether the unsafe-algebra flag is set.
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bool hasUnsafeAlgebra() const;
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/// Determine whether the no-NaNs flag is set.
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bool hasNoNaNs() const;
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/// Determine whether the no-infs flag is set.
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bool hasNoInfs() const;
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/// Determine whether the no-signed-zeros flag is set.
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bool hasNoSignedZeros() const;
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/// Determine whether the allow-reciprocal flag is set.
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bool hasAllowReciprocal() const;
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/// Convenience function for getting all the fast-math flags, which must be an
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/// operator which supports these flags. See LangRef.html for the meaning of
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/// these flags.
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FastMathFlags getFastMathFlags() const;
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/// Copy I's fast-math flags
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void copyFastMathFlags(const Instruction *I);
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private:
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/// hasMetadataHashEntry - Return true if we have an entry in the on-the-side
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/// metadata hash.
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bool hasMetadataHashEntry() const {
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return (getSubclassDataFromValue() & HasMetadataBit) != 0;
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}
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// These are all implemented in Metadata.cpp.
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MDNode *getMetadataImpl(unsigned KindID) const;
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MDNode *getMetadataImpl(StringRef Kind) const;
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void
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getAllMetadataImpl(SmallVectorImpl<std::pair<unsigned, MDNode *>> &) const;
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void getAllMetadataOtherThanDebugLocImpl(
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SmallVectorImpl<std::pair<unsigned, MDNode *>> &) const;
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void clearMetadataHashEntries();
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public:
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//===--------------------------------------------------------------------===//
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// Predicates and helper methods.
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//===--------------------------------------------------------------------===//
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/// isAssociative - Return true if the instruction is associative:
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///
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/// Associative operators satisfy: x op (y op z) === (x op y) op z
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///
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/// In LLVM, the Add, Mul, And, Or, and Xor operators are associative.
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///
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bool isAssociative() const;
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static bool isAssociative(unsigned op);
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/// isCommutative - Return true if the instruction is commutative:
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///
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/// Commutative operators satisfy: (x op y) === (y op x)
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///
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/// In LLVM, these are the associative operators, plus SetEQ and SetNE, when
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/// applied to any type.
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///
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bool isCommutative() const { return isCommutative(getOpcode()); }
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static bool isCommutative(unsigned op);
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/// isIdempotent - Return true if the instruction is idempotent:
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///
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/// Idempotent operators satisfy: x op x === x
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///
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/// In LLVM, the And and Or operators are idempotent.
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///
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bool isIdempotent() const { return isIdempotent(getOpcode()); }
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static bool isIdempotent(unsigned op);
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/// isNilpotent - Return true if the instruction is nilpotent:
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///
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/// Nilpotent operators satisfy: x op x === Id,
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///
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/// where Id is the identity for the operator, i.e. a constant such that
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/// x op Id === x and Id op x === x for all x.
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///
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/// In LLVM, the Xor operator is nilpotent.
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///
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bool isNilpotent() const { return isNilpotent(getOpcode()); }
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static bool isNilpotent(unsigned op);
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/// mayWriteToMemory - Return true if this instruction may modify memory.
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///
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bool mayWriteToMemory() const;
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/// mayReadFromMemory - Return true if this instruction may read memory.
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///
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bool mayReadFromMemory() const;
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/// mayReadOrWriteMemory - Return true if this instruction may read or
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/// write memory.
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///
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bool mayReadOrWriteMemory() const {
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return mayReadFromMemory() || mayWriteToMemory();
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}
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/// isAtomic - Return true if this instruction has an
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/// AtomicOrdering of unordered or higher.
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///
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bool isAtomic() const;
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/// mayThrow - Return true if this instruction may throw an exception.
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///
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bool mayThrow() const;
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/// mayReturn - Return true if this is a function that may return.
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/// this is true for all normal instructions. The only exception
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/// is functions that are marked with the 'noreturn' attribute.
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///
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bool mayReturn() const;
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/// mayHaveSideEffects - Return true if the instruction may have side effects.
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///
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/// Note that this does not consider malloc and alloca to have side
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/// effects because the newly allocated memory is completely invisible to
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/// instructions which don't used the returned value. For cases where this
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/// matters, isSafeToSpeculativelyExecute may be more appropriate.
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bool mayHaveSideEffects() const {
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return mayWriteToMemory() || mayThrow() || !mayReturn();
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}
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/// clone() - Create a copy of 'this' instruction that is identical in all
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/// ways except the following:
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/// * The instruction has no parent
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/// * The instruction has no name
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///
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Instruction *clone() const;
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/// isIdenticalTo - Return true if the specified instruction is exactly
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/// identical to the current one. This means that all operands match and any
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/// extra information (e.g. load is volatile) agree.
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bool isIdenticalTo(const Instruction *I) const;
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/// isIdenticalToWhenDefined - This is like isIdenticalTo, except that it
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/// ignores the SubclassOptionalData flags, which specify conditions
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/// under which the instruction's result is undefined.
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bool isIdenticalToWhenDefined(const Instruction *I) const;
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/// When checking for operation equivalence (using isSameOperationAs) it is
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/// sometimes useful to ignore certain attributes.
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enum OperationEquivalenceFlags {
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/// Check for equivalence ignoring load/store alignment.
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CompareIgnoringAlignment = 1<<0,
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/// Check for equivalence treating a type and a vector of that type
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/// as equivalent.
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CompareUsingScalarTypes = 1<<1
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};
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/// This function determines if the specified instruction executes the same
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/// operation as the current one. This means that the opcodes, type, operand
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/// types and any other factors affecting the operation must be the same. This
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/// is similar to isIdenticalTo except the operands themselves don't have to
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/// be identical.
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/// @returns true if the specified instruction is the same operation as
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/// the current one.
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/// @brief Determine if one instruction is the same operation as another.
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bool isSameOperationAs(const Instruction *I, unsigned flags = 0) const;
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/// isUsedOutsideOfBlock - Return true if there are any uses of this
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/// instruction in blocks other than the specified block. Note that PHI nodes
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/// are considered to evaluate their operands in the corresponding predecessor
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/// block.
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bool isUsedOutsideOfBlock(const BasicBlock *BB) 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 Value *V) {
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return V->getValueID() >= Value::InstructionVal;
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}
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//----------------------------------------------------------------------
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// Exported enumerations.
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//
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enum TermOps { // These terminate basic blocks
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#define FIRST_TERM_INST(N) TermOpsBegin = N,
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#define HANDLE_TERM_INST(N, OPC, CLASS) OPC = N,
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#define LAST_TERM_INST(N) TermOpsEnd = N+1
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#include "llvm/IR/Instruction.def"
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};
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enum BinaryOps {
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#define FIRST_BINARY_INST(N) BinaryOpsBegin = N,
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#define HANDLE_BINARY_INST(N, OPC, CLASS) OPC = N,
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#define LAST_BINARY_INST(N) BinaryOpsEnd = N+1
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#include "llvm/IR/Instruction.def"
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};
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enum MemoryOps {
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#define FIRST_MEMORY_INST(N) MemoryOpsBegin = N,
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#define HANDLE_MEMORY_INST(N, OPC, CLASS) OPC = N,
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#define LAST_MEMORY_INST(N) MemoryOpsEnd = N+1
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#include "llvm/IR/Instruction.def"
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};
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enum CastOps {
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#define FIRST_CAST_INST(N) CastOpsBegin = N,
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#define HANDLE_CAST_INST(N, OPC, CLASS) OPC = N,
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#define LAST_CAST_INST(N) CastOpsEnd = N+1
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#include "llvm/IR/Instruction.def"
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};
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enum OtherOps {
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#define FIRST_OTHER_INST(N) OtherOpsBegin = N,
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#define HANDLE_OTHER_INST(N, OPC, CLASS) OPC = N,
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#define LAST_OTHER_INST(N) OtherOpsEnd = N+1
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#include "llvm/IR/Instruction.def"
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};
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private:
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// Shadow Value::setValueSubclassData with a private forwarding method so that
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// subclasses cannot accidentally use it.
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void setValueSubclassData(unsigned short D) {
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Value::setValueSubclassData(D);
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}
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unsigned short getSubclassDataFromValue() const {
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return Value::getSubclassDataFromValue();
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}
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void setHasMetadataHashEntry(bool V) {
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setValueSubclassData((getSubclassDataFromValue() & ~HasMetadataBit) |
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(V ? HasMetadataBit : 0));
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}
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friend class SymbolTableListTraits<Instruction, BasicBlock>;
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void setParent(BasicBlock *P);
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protected:
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// Instruction subclasses can stick up to 15 bits of stuff into the
|
|
// SubclassData field of instruction with these members.
|
|
|
|
// Verify that only the low 15 bits are used.
|
|
void setInstructionSubclassData(unsigned short D) {
|
|
assert((D & HasMetadataBit) == 0 && "Out of range value put into field");
|
|
setValueSubclassData((getSubclassDataFromValue() & HasMetadataBit) | D);
|
|
}
|
|
|
|
unsigned getSubclassDataFromInstruction() const {
|
|
return getSubclassDataFromValue() & ~HasMetadataBit;
|
|
}
|
|
|
|
Instruction(Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
|
|
Instruction *InsertBefore = nullptr);
|
|
Instruction(Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
|
|
BasicBlock *InsertAtEnd);
|
|
virtual Instruction *clone_impl() const = 0;
|
|
|
|
};
|
|
|
|
inline Instruction *ilist_traits<Instruction>::createSentinel() const {
|
|
// Since i(p)lists always publicly derive from their corresponding traits,
|
|
// placing a data member in this class will augment the i(p)list. But since
|
|
// the NodeTy is expected to be publicly derive from ilist_node<NodeTy>,
|
|
// there is a legal viable downcast from it to NodeTy. We use this trick to
|
|
// superimpose an i(p)list with a "ghostly" NodeTy, which becomes the
|
|
// sentinel. Dereferencing the sentinel is forbidden (save the
|
|
// ilist_node<NodeTy>), so no one will ever notice the superposition.
|
|
return static_cast<Instruction *>(&Sentinel);
|
|
}
|
|
|
|
// Instruction* is only 4-byte aligned.
|
|
template<>
|
|
class PointerLikeTypeTraits<Instruction*> {
|
|
typedef Instruction* PT;
|
|
public:
|
|
static inline void *getAsVoidPointer(PT P) { return P; }
|
|
static inline PT getFromVoidPointer(void *P) {
|
|
return static_cast<PT>(P);
|
|
}
|
|
enum { NumLowBitsAvailable = 2 };
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|