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fix documentation comments; NFC
llvm-svn: 263345
This commit is contained in:
Sanjay Patel
parent
2077c270a0
commit
8e3352072c
@ -42,23 +42,23 @@ class Instruction : public User,
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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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/// This is a bit stored in the SubClassData field which indicates whether
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/// 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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/// Specialize the methods defined in Value, as we know that an instruction
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/// 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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/// 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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@ -66,20 +66,18 @@ public:
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const Module *getModule() const;
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Module *getModule();
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/// \brief Return the function this instruction belongs to.
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/// Return the function this instruction belongs to.
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///
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/// Note: it is undefined behavior to call this on an instruction not
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/// currently inserted into a function.
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const Function *getFunction() const;
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Function *getFunction();
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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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/// This method unlinks 'this' from the containing basic block, but does not
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/// delete it.
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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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/// This method unlinks 'this' from the containing basic 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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SymbolTableList<Instruction>::iterator eraseFromParent();
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@ -92,16 +90,15 @@ public:
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/// 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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/// Unlink this instruction from its current basic block and insert it into
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/// the basic block that MovePos lives in, right before 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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/// 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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@ -121,28 +118,27 @@ public:
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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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/// 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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/// Return true if this is a logical shift left or a logical 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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/// 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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/// 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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/// @brief Determine if the OpCode is one of the FuncletPadInst instructions.
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/// Determine if the OpCode is one of the FuncletPadInst instructions.
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static inline bool isFuncletPad(unsigned OpCode) {
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return OpCode >= FuncletPadOpsBegin && OpCode < FuncletPadOpsEnd;
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}
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@ -151,55 +147,53 @@ public:
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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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/// Return true if this instruction has any metadata attached 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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/// Return true if this instruction has metadata attached to it other than a
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/// 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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/// 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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/// 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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/// Get all metadata attached to this Instruction. The first element of each
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/// pair returned is the KindID, the second element is the metadata value.
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/// 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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/// This does the same thing as getAllMetadata, except that it filters out the
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/// 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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/// Fills the AAMDNodes structure with AA metadata from this instruction.
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/// When Merge is true, the existing AA metadata is merged with that from this
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/// 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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/// Set the metadata of the specified kind to the specified node. This updates
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/// or replaces metadata if already present, or removes it if 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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@ -220,14 +214,13 @@ public:
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}
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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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/// Sets the metadata on this instruction from the 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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/// 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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/// 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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@ -289,8 +282,7 @@ public:
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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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/// Return true if we have an entry in the on-the-side 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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@ -302,6 +294,7 @@ private:
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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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/// Clear all hashtable-based metadata from this instruction.
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void clearMetadataHashEntries();
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public:
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//===--------------------------------------------------------------------===//
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@ -309,7 +302,7 @@ public:
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//===--------------------------------------------------------------------===//
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/// isAssociative - Return true if the instruction is associative:
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/// 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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@ -318,7 +311,7 @@ public:
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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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/// 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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@ -328,7 +321,7 @@ public:
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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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/// 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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@ -337,7 +330,7 @@ public:
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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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/// 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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@ -349,37 +342,31 @@ public:
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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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/// Return true if this instruction may modify memory.
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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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/// Return true if this instruction may read memory.
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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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/// Return true if this instruction may read or write memory.
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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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/// Return true if this instruction has an AtomicOrdering of unordered or
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/// higher.
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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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/// Return true if this instruction may throw an exception.
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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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/// 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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/// 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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@ -389,7 +376,7 @@ public:
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return mayWriteToMemory() || mayThrow() || !mayReturn();
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}
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/// \brief Return true if the instruction is a variety of EH-block.
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/// Return true if the instruction is a variety of EH-block.
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bool isEHPad() const {
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switch (getOpcode()) {
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case Instruction::CatchSwitch:
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@ -402,21 +389,21 @@ public:
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}
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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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/// Create a copy of 'this' instruction that is identical in all ways except
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/// 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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/// Return true if the specified instruction is exactly identical to the
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/// current one. This means that all operands match and any extra information
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/// (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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/// This is like isIdenticalTo, except that it ignores the
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/// SubclassOptionalData flags, which specify conditions under which the
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/// 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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@ -439,10 +426,9 @@ public:
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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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/// Return true if there are any uses of this instruction in blocks other than
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/// the specified block. Note that PHI nodes are considered to evaluate their
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/// operands in the corresponding predecessor block.
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bool isUsedOutsideOfBlock(const BasicBlock *BB) const;
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