#define LLVM_INSTRUCTION_H
#include "llvm/User.h"
+#include "llvm/ADT/ilist_node.h"
namespace llvm {
-struct AssemblyAnnotationWriter;
-class BinaryOperator;
-
template<typename ValueSubClass, typename ItemParentClass>
class SymbolTableListTraits;
-class Instruction : public User {
+class Instruction : public User, public ilist_node<Instruction> {
void operator=(const Instruction &); // Do not implement
Instruction(const Instruction &); // Do not implement
BasicBlock *Parent;
- Instruction *Prev, *Next; // Next and Prev links for our intrusive linked list
-
- void setNext(Instruction *N) { Next = N; }
- void setPrev(Instruction *N) { Prev = N; }
friend class SymbolTableListTraits<Instruction, BasicBlock>;
void setParent(BasicBlock *P);
// Out of line virtual method, so the vtable, etc has a home.
~Instruction();
- /// mayWriteToMemory - Return true if this instruction may modify memory.
- ///
- bool mayWriteToMemory() const;
-
- /// mayReadFromMemory - Return true if this instruction may read memory.
- ///
- bool mayReadFromMemory() const;
-
/// clone() - Create a copy of 'this' instruction that is identical in all
/// ways except the following:
/// * The instruction has no parent
/// isIdenticalTo - Return true if the specified instruction is exactly
/// identical to the current one. This means that all operands match and any
/// extra information (e.g. load is volatile) agree.
- bool isIdenticalTo(Instruction *I) const;
+ bool isIdenticalTo(const Instruction *I) const;
/// This function determines if the specified instruction executes the same
/// operation as the current one. This means that the opcodes, type, operand
/// @returns true if the specified instruction is the same operation as
/// the current one.
/// @brief Determine if one instruction is the same operation as another.
- bool isSameOperationAs(Instruction *I) const;
+ bool isSameOperationAs(const Instruction *I) const;
/// isUsedOutsideOfBlock - Return true if there are any uses of this
/// instruction in blocks other than the specified block. Note that PHI nodes
///
void eraseFromParent();
+ /// insertBefore - Insert an unlinked instructions into a basic block
+ /// immediately before the specified instruction.
+ void insertBefore(Instruction *InsertPos);
+
+ /// insertAfter - Insert an unlinked instructions into a basic block
+ /// immediately after the specified instruction.
+ void insertAfter(Instruction *InsertPos);
+
/// moveBefore - Unlink this instruction from its current basic block and
/// insert it into the basic block that MovePos lives in, right before
/// MovePos.
return getOpcode() == Shl || getOpcode() == LShr;
}
- /// isLogicalShift - Return true if this is a logical shift left or a logical
- /// shift right.
+ /// isArithmeticShift - Return true if this is an arithmetic shift right.
inline bool isArithmeticShift() const {
return getOpcode() == AShr;
}
bool isCommutative() const { return isCommutative(getOpcode()); }
static bool isCommutative(unsigned op);
- /// isTrappingInstruction - Return true if the instruction may trap.
+ /// isTrapping - Return true if the instruction may trap.
///
bool isTrapping() const {
return isTrapping(getOpcode());
}
static bool isTrapping(unsigned op);
- virtual void print(std::ostream &OS) const { print(OS, 0); }
- void print(std::ostream *OS) const { if (OS) print(*OS); }
- void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
+ /// mayWriteToMemory - Return true if this instruction may modify memory.
+ ///
+ bool mayWriteToMemory() const;
+
+ /// mayReadFromMemory - Return true if this instruction may read memory.
+ ///
+ bool mayReadFromMemory() const;
+
+ /// mayThrow - Return true if this instruction may throw an exception.
+ ///
+ bool mayThrow() const;
+
+ /// mayHaveSideEffects - Return true if the instruction may have side effects.
+ ///
+ bool mayHaveSideEffects() const {
+ return mayWriteToMemory() || mayThrow();
+ }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const Instruction *) { return true; }
#define LAST_OTHER_INST(N) OtherOpsEnd = N+1
#include "llvm/Instruction.def"
};
-
-private:
- // getNext/Prev - Return the next or previous instruction in the list. The
- // last node in the list is a terminator instruction.
- Instruction *getNext() { return Next; }
- const Instruction *getNext() const { return Next; }
- Instruction *getPrev() { return Prev; }
- const Instruction *getPrev() const { return Prev; }
};
+// 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