SDNodeDbgValue.h revision fd919200d4f678ff751f96a1d3b7e14785fb2338
1//===-- llvm/CodeGen/SDNodeDbgValue.h - SelectionDAG dbg_value --*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file declares the SDDbgValue class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CODEGEN_SDNODEDBGVALUE_H 15#define LLVM_CODEGEN_SDNODEDBGVALUE_H 16 17#include "llvm/ADT/SmallVector.h" 18#include "llvm/Support/DebugLoc.h" 19#include "llvm/System/DataTypes.h" 20 21namespace llvm { 22 23class MDNode; 24class SDNode; 25class Value; 26 27/// SDDbgValue - Holds the information from a dbg_value node through SDISel. 28/// We do not use SDValue here to avoid including its header. 29 30class SDDbgValue { 31public: 32 enum DbgValueKind { 33 SDNODE = 0, // value is the result of an expression 34 CONST = 1, // value is a constant 35 FRAMEIX = 2 // value is contents of a stack location 36 }; 37private: 38 enum DbgValueKind kind; 39 union { 40 struct { 41 SDNode *Node; // valid for expressions 42 unsigned ResNo; // valid for expressions 43 } s; 44 Value *Const; // valid for constants 45 unsigned FrameIx; // valid for stack objects 46 } u; 47 MDNode *mdPtr; 48 uint64_t Offset; 49 DebugLoc DL; 50 unsigned Order; 51 bool Invalid; 52public: 53 // Constructor for non-constants. 54 SDDbgValue(MDNode *mdP, SDNode *N, unsigned R, uint64_t off, DebugLoc dl, 55 unsigned O) : mdPtr(mdP), Offset(off), DL(dl), Order(O), 56 Invalid(false) { 57 kind = SDNODE; 58 u.s.Node = N; 59 u.s.ResNo = R; 60 } 61 62 // Constructor for constants. 63 SDDbgValue(MDNode *mdP, Value *C, uint64_t off, DebugLoc dl, unsigned O) : 64 mdPtr(mdP), Offset(off), DL(dl), Order(O), Invalid(false) { 65 kind = CONST; 66 u.Const = C; 67 } 68 69 // Constructor for frame indices. 70 SDDbgValue(MDNode *mdP, unsigned FI, uint64_t off, DebugLoc dl, unsigned O) : 71 mdPtr(mdP), Offset(off), DL(dl), Order(O), Invalid(false) { 72 kind = FRAMEIX; 73 u.FrameIx = FI; 74 } 75 76 // Returns the kind. 77 DbgValueKind getKind() { return kind; } 78 79 // Returns the MDNode pointer. 80 MDNode *getMDPtr() { return mdPtr; } 81 82 // Returns the SDNode* for a register ref 83 SDNode *getSDNode() { assert (kind==SDNODE); return u.s.Node; } 84 85 // Returns the ResNo for a register ref 86 unsigned getResNo() { assert (kind==SDNODE); return u.s.ResNo; } 87 88 // Returns the Value* for a constant 89 Value *getConst() { assert (kind==CONST); return u.Const; } 90 91 // Returns the FrameIx for a stack object 92 unsigned getFrameIx() { assert (kind==FRAMEIX); return u.FrameIx; } 93 94 // Returns the offset. 95 uint64_t getOffset() { return Offset; } 96 97 // Returns the DebugLoc. 98 DebugLoc getDebugLoc() { return DL; } 99 100 // Returns the SDNodeOrder. This is the order of the preceding node in the 101 // input. 102 unsigned getOrder() { return Order; } 103 104 // setIsInvalidated / isInvalidated - Setter / getter of the "Invalidated" 105 // property. A SDDbgValue is invalid if the SDNode that produces the value is 106 // deleted. 107 void setIsInvalidated() { Invalid = true; } 108 bool isInvalidated() { return Invalid; } 109}; 110 111} // end llvm namespace 112 113#endif 114