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_LIB_CODEGEN_SELECTIONDAG_SDNODEDBGVALUE_H 15 #define LLVM_LIB_CODEGEN_SELECTIONDAG_SDNODEDBGVALUE_H 16 17 #include "llvm/IR/DebugLoc.h" 18 #include "llvm/Support/DataTypes.h" 19 #include <utility> 20 21 namespace llvm { 22 23 class DIVariable; 24 class DIExpression; 25 class SDNode; 26 class Value; 27 28 /// Holds the information from a dbg_value node through SDISel. 29 /// We do not use SDValue here to avoid including its header. 30 class SDDbgValue { 31 public: 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 VREG = 3 ///< Value is a virtual register. 37 }; 38 private: 39 union { 40 struct { 41 SDNode *Node; ///< Valid for expressions. 42 unsigned ResNo; ///< Valid for expressions. 43 } s; 44 const Value *Const; ///< Valid for constants. 45 unsigned FrameIx; ///< Valid for stack objects. 46 unsigned VReg; ///< Valid for registers. 47 } u; 48 DIVariable *Var; 49 DIExpression *Expr; 50 DebugLoc DL; 51 unsigned Order; 52 enum DbgValueKind kind; 53 bool IsIndirect; 54 bool Invalid = false; 55 56 public: 57 /// Constructor for non-constants. 58 SDDbgValue(DIVariable *Var, DIExpression *Expr, SDNode *N, unsigned R, 59 bool indir, DebugLoc dl, unsigned O) 60 : Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(indir) { 61 kind = SDNODE; 62 u.s.Node = N; 63 u.s.ResNo = R; 64 } 65 66 /// Constructor for constants. 67 SDDbgValue(DIVariable *Var, DIExpression *Expr, const Value *C, DebugLoc dl, 68 unsigned O) 69 : Var(Var), Expr(Expr), DL(std::move(dl)), Order(O), IsIndirect(false) { 70 kind = CONST; 71 u.Const = C; 72 } 73 74 /// Constructor for virtual registers and frame indices. 75 SDDbgValue(DIVariable *Var, DIExpression *Expr, unsigned VRegOrFrameIdx, 76 bool IsIndirect, DebugLoc DL, unsigned Order, 77 enum DbgValueKind Kind) 78 : Var(Var), Expr(Expr), DL(DL), Order(Order), IsIndirect(IsIndirect) { 79 assert((Kind == VREG || Kind == FRAMEIX) && 80 "Invalid SDDbgValue constructor"); 81 kind = Kind; 82 if (kind == VREG) 83 u.VReg = VRegOrFrameIdx; 84 else 85 u.FrameIx = VRegOrFrameIdx; 86 } 87 88 /// Returns the kind. 89 DbgValueKind getKind() const { return kind; } 90 91 /// Returns the DIVariable pointer for the variable. 92 DIVariable *getVariable() const { return Var; } 93 94 /// Returns the DIExpression pointer for the expression. 95 DIExpression *getExpression() const { return Expr; } 96 97 /// Returns the SDNode* for a register ref 98 SDNode *getSDNode() const { assert (kind==SDNODE); return u.s.Node; } 99 100 /// Returns the ResNo for a register ref 101 unsigned getResNo() const { assert (kind==SDNODE); return u.s.ResNo; } 102 103 /// Returns the Value* for a constant 104 const Value *getConst() const { assert (kind==CONST); return u.Const; } 105 106 /// Returns the FrameIx for a stack object 107 unsigned getFrameIx() const { assert (kind==FRAMEIX); return u.FrameIx; } 108 109 /// Returns the Virtual Register for a VReg 110 unsigned getVReg() const { assert (kind==VREG); return u.VReg; } 111 112 /// Returns whether this is an indirect value. 113 bool isIndirect() const { return IsIndirect; } 114 115 /// Returns the DebugLoc. 116 DebugLoc getDebugLoc() const { return DL; } 117 118 /// Returns the SDNodeOrder. This is the order of the preceding node in the 119 /// input. 120 unsigned getOrder() const { return Order; } 121 122 /// setIsInvalidated / isInvalidated - Setter / getter of the "Invalidated" 123 /// property. A SDDbgValue is invalid if the SDNode that produces the value is 124 /// deleted. 125 void setIsInvalidated() { Invalid = true; } 126 bool isInvalidated() const { return Invalid; } 127 }; 128 129 /// Holds the information from a dbg_label node through SDISel. 130 /// We do not use SDValue here to avoid including its header. 131 class SDDbgLabel { 132 MDNode *Label; 133 DebugLoc DL; 134 unsigned Order; 135 136 public: 137 SDDbgLabel(MDNode *Label, DebugLoc dl, unsigned O) 138 : Label(Label), DL(std::move(dl)), Order(O) {} 139 140 /// Returns the MDNode pointer for the label. 141 MDNode *getLabel() const { return Label; } 142 143 /// Returns the DebugLoc. 144 DebugLoc getDebugLoc() const { return DL; } 145 146 /// Returns the SDNodeOrder. This is the order of the preceding node in the 147 /// input. 148 unsigned getOrder() const { return Order; } 149 }; 150 151 } // end llvm namespace 152 153 #endif 154