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/IR/DebugLoc.h" 19 #include "llvm/Support/DataTypes.h" 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 enum DbgValueKind kind; 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 } u; 47 MDNode *mdPtr; 48 bool IsIndirect; 49 uint64_t Offset; 50 DebugLoc DL; 51 unsigned Order; 52 bool Invalid; 53 public: 54 // Constructor for non-constants. 55 SDDbgValue(MDNode *mdP, SDNode *N, unsigned R, 56 bool indir, uint64_t off, DebugLoc dl, 57 unsigned O) : mdPtr(mdP), IsIndirect(indir), 58 Offset(off), DL(dl), Order(O), 59 Invalid(false) { 60 kind = SDNODE; 61 u.s.Node = N; 62 u.s.ResNo = R; 63 } 64 65 // Constructor for constants. 66 SDDbgValue(MDNode *mdP, const Value *C, uint64_t off, DebugLoc dl, 67 unsigned O) : 68 mdPtr(mdP), IsIndirect(false), Offset(off), DL(dl), Order(O), 69 Invalid(false) { 70 kind = CONST; 71 u.Const = C; 72 } 73 74 // Constructor for frame indices. 75 SDDbgValue(MDNode *mdP, unsigned FI, uint64_t off, DebugLoc dl, unsigned O) : 76 mdPtr(mdP), IsIndirect(false), Offset(off), DL(dl), Order(O), 77 Invalid(false) { 78 kind = FRAMEIX; 79 u.FrameIx = FI; 80 } 81 82 // Returns the kind. 83 DbgValueKind getKind() { return kind; } 84 85 // Returns the MDNode pointer. 86 MDNode *getMDPtr() { return mdPtr; } 87 88 // Returns the SDNode* for a register ref 89 SDNode *getSDNode() { assert (kind==SDNODE); return u.s.Node; } 90 91 // Returns the ResNo for a register ref 92 unsigned getResNo() { assert (kind==SDNODE); return u.s.ResNo; } 93 94 // Returns the Value* for a constant 95 const Value *getConst() { assert (kind==CONST); return u.Const; } 96 97 // Returns the FrameIx for a stack object 98 unsigned getFrameIx() { assert (kind==FRAMEIX); return u.FrameIx; } 99 100 // Returns whether this is an indirect value. 101 bool isIndirect() { return IsIndirect; } 102 103 // Returns the offset. 104 uint64_t getOffset() { return Offset; } 105 106 // Returns the DebugLoc. 107 DebugLoc getDebugLoc() { return DL; } 108 109 // Returns the SDNodeOrder. This is the order of the preceding node in the 110 // input. 111 unsigned getOrder() { return Order; } 112 113 // setIsInvalidated / isInvalidated - Setter / getter of the "Invalidated" 114 // property. A SDDbgValue is invalid if the SDNode that produces the value is 115 // deleted. 116 void setIsInvalidated() { Invalid = true; } 117 bool isInvalidated() { return Invalid; } 118 }; 119 120 } // end llvm namespace 121 122 #endif 123
