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 MDNode; 24 class SDNode; 25 class 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 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 }; 37 private: 38 union { 39 struct { 40 SDNode *Node; // valid for expressions 41 unsigned ResNo; // valid for expressions 42 } s; 43 const Value *Const; // valid for constants 44 unsigned FrameIx; // valid for stack objects 45 } u; 46 MDNode *Var; 47 MDNode *Expr; 48 uint64_t Offset; 49 DebugLoc DL; 50 unsigned Order; 51 enum DbgValueKind kind; 52 bool IsIndirect; 53 bool Invalid = false; 54 55 public: 56 // Constructor for non-constants. 57 SDDbgValue(MDNode *Var, MDNode *Expr, SDNode *N, unsigned R, bool indir, 58 uint64_t off, DebugLoc dl, unsigned O) 59 : Var(Var), Expr(Expr), Offset(off), DL(std::move(dl)), Order(O), 60 IsIndirect(indir) { 61 kind = SDNODE; 62 u.s.Node = N; 63 u.s.ResNo = R; 64 } 65 66 // Constructor for constants. 67 SDDbgValue(MDNode *Var, MDNode *Expr, const Value *C, uint64_t off, 68 DebugLoc dl, unsigned O) 69 : Var(Var), Expr(Expr), Offset(off), DL(std::move(dl)), Order(O), 70 IsIndirect(false) { 71 kind = CONST; 72 u.Const = C; 73 } 74 75 // Constructor for frame indices. 76 SDDbgValue(MDNode *Var, MDNode *Expr, unsigned FI, uint64_t off, DebugLoc dl, 77 unsigned O) 78 : Var(Var), Expr(Expr), Offset(off), DL(std::move(dl)), Order(O), 79 IsIndirect(false) { 80 kind = FRAMEIX; 81 u.FrameIx = FI; 82 } 83 84 // Returns the kind. 85 DbgValueKind getKind() const { return kind; } 86 87 // Returns the MDNode pointer for the variable. 88 MDNode *getVariable() const { return Var; } 89 90 // Returns the MDNode pointer for the expression. 91 MDNode *getExpression() const { return Expr; } 92 93 // Returns the SDNode* for a register ref 94 SDNode *getSDNode() const { assert (kind==SDNODE); return u.s.Node; } 95 96 // Returns the ResNo for a register ref 97 unsigned getResNo() const { assert (kind==SDNODE); return u.s.ResNo; } 98 99 // Returns the Value* for a constant 100 const Value *getConst() const { assert (kind==CONST); return u.Const; } 101 102 // Returns the FrameIx for a stack object 103 unsigned getFrameIx() const { assert (kind==FRAMEIX); return u.FrameIx; } 104 105 // Returns whether this is an indirect value. 106 bool isIndirect() const { return IsIndirect; } 107 108 // Returns the offset. 109 uint64_t getOffset() const { return Offset; } 110 111 // Returns the DebugLoc. 112 DebugLoc getDebugLoc() const { return DL; } 113 114 // Returns the SDNodeOrder. This is the order of the preceding node in the 115 // input. 116 unsigned getOrder() const { return Order; } 117 118 // setIsInvalidated / isInvalidated - Setter / getter of the "Invalidated" 119 // property. A SDDbgValue is invalid if the SDNode that produces the value is 120 // deleted. 121 void setIsInvalidated() { Invalid = true; } 122 bool isInvalidated() const { return Invalid; } 123 }; 124 125 } // end llvm namespace 126 127 #endif 128
