1 //===---- llvm/Support/DebugLoc.h - Debug Location Information --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a number of light weight data structures used
11 // to describe and track debug location information.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_SUPPORT_DEBUGLOC_H
16 #define LLVM_SUPPORT_DEBUGLOC_H
18 #include "llvm/ADT/DenseMapInfo.h"
24 /// DebugLoc - Debug location id. This is carried by Instruction, SDNode,
25 /// and MachineInstr to compactly encode file/line/scope information for an
28 friend struct DenseMapInfo<DebugLoc>;
30 /// getTombstoneKey() - A private constructor that returns an unknown that
31 /// is distinguishable from the usual one.
32 static DebugLoc getTombstoneKey() {
38 /// LineCol - This 32-bit value encodes the line and column number for the
39 /// location, encoded as 24-bits for line and 8 bits for col. A value of 0
40 /// for either means unknown.
43 /// ScopeIdx - This is an opaque ID# for Scope/InlinedAt information,
44 /// decoded by LLVMContext. 0 is unknown.
47 DebugLoc() : LineCol(0), ScopeIdx(0) {} // Defaults to unknown.
49 /// get - Get a new DebugLoc that corresponds to the specified line/col
50 /// scope/inline location.
51 static DebugLoc get(unsigned Line, unsigned Col,
52 MDNode *Scope, MDNode *InlinedAt = 0);
54 /// getFromDILocation - Translate the DILocation quad into a DebugLoc.
55 static DebugLoc getFromDILocation(MDNode *N);
57 /// isUnknown - Return true if this is an unknown location.
58 bool isUnknown() const { return ScopeIdx == 0; }
60 unsigned getLine() const {
61 return (LineCol << 8) >> 8; // Mask out column.
64 unsigned getCol() const {
68 /// getScope - This returns the scope pointer for this DebugLoc, or null if
70 MDNode *getScope(const LLVMContext &Ctx) const;
72 /// getInlinedAt - This returns the InlinedAt pointer for this DebugLoc, or
73 /// null if invalid or not present.
74 MDNode *getInlinedAt(const LLVMContext &Ctx) const;
76 /// getScopeAndInlinedAt - Return both the Scope and the InlinedAt values.
77 void getScopeAndInlinedAt(MDNode *&Scope, MDNode *&IA,
78 const LLVMContext &Ctx) const;
81 /// getAsMDNode - This method converts the compressed DebugLoc node into a
82 /// DILocation compatible MDNode.
83 MDNode *getAsMDNode(const LLVMContext &Ctx) const;
85 bool operator==(const DebugLoc &DL) const {
86 return LineCol == DL.LineCol && ScopeIdx == DL.ScopeIdx;
88 bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
92 struct DenseMapInfo<DebugLoc> {
93 static DebugLoc getEmptyKey();
94 static DebugLoc getTombstoneKey();
95 static unsigned getHashValue(const DebugLoc &Key);
96 static bool isEqual(const DebugLoc &LHS, const DebugLoc &RHS);
98 } // end namespace llvm
100 #endif /* LLVM_DEBUGLOC_H */