1 //===-- llvm/CodeGen/PseudoSourceValue.h ------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declaration of the PseudoSourceValue class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CODEGEN_PSEUDOSOURCEVALUE_H
15 #define LLVM_CODEGEN_PSEUDOSOURCEVALUE_H
17 #include "llvm/Value.h"
20 class MachineFrameInfo;
22 /// PseudoSourceValue - Special value supplied for machine level alias
23 /// analysis. It indicates that the a memory access references the functions
24 /// stack frame (e.g., a spill slot), below the stack frame (e.g., argument
25 /// space), or constant pool.
26 class PseudoSourceValue : public Value {
30 virtual void print(std::ostream &OS) const;
32 /// isConstant - Test whether this PseudoSourceValue has a constant value.
34 virtual bool isConstant(const MachineFrameInfo *) const;
36 /// classof - Methods for support type inquiry through isa, cast, and
39 static inline bool classof(const PseudoSourceValue *) { return true; }
40 static inline bool classof(const Value *V) {
41 return V->getValueID() == PseudoSourceValueVal;
44 /// A pseudo source value referencing a fixed stack frame entry,
45 /// e.g., a spill slot.
46 static const PseudoSourceValue *getFixedStack(int FI);
48 /// A source value referencing the area below the stack frame of a function,
49 /// e.g., the argument space.
50 static const PseudoSourceValue *getStack();
52 /// A source value referencing the global offset table (or something the
54 static const PseudoSourceValue *getGOT();
56 /// A SV referencing the constant pool
57 static const PseudoSourceValue *getConstantPool();
59 /// A SV referencing the jump table
60 static const PseudoSourceValue *getJumpTable();
62 } // End llvm namespace