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