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113 lines
3.9 KiB
C++
113 lines
3.9 KiB
C++
//===---- llvm/Support/DebugLoc.h - Debug Location Information --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a number of light weight data structures used
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// to describe and track debug location information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_DEBUGLOC_H
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#define LLVM_SUPPORT_DEBUGLOC_H
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namespace llvm {
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template <typename T> struct DenseMapInfo;
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class MDNode;
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class LLVMContext;
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/// DebugLoc - Debug location id. This is carried by Instruction, SDNode,
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/// and MachineInstr to compactly encode file/line/scope information for an
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/// operation.
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class DebugLoc {
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friend struct DenseMapInfo<DebugLoc>;
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/// getEmptyKey() - A private constructor that returns an unknown that is
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/// not equal to the tombstone key or DebugLoc().
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static DebugLoc getEmptyKey() {
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DebugLoc DL;
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DL.LineCol = 1;
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return DL;
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}
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/// getTombstoneKey() - A private constructor that returns an unknown that
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/// is not equal to the empty key or DebugLoc().
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static DebugLoc getTombstoneKey() {
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DebugLoc DL;
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DL.LineCol = 2;
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return DL;
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}
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/// LineCol - This 32-bit value encodes the line and column number for the
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/// location, encoded as 24-bits for line and 8 bits for col. A value of 0
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/// for either means unknown.
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unsigned LineCol;
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/// ScopeIdx - This is an opaque ID# for Scope/InlinedAt information,
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/// decoded by LLVMContext. 0 is unknown.
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int ScopeIdx;
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public:
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DebugLoc() : LineCol(0), ScopeIdx(0) {} // Defaults to unknown.
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/// get - Get a new DebugLoc that corresponds to the specified line/col
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/// scope/inline location.
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static DebugLoc get(unsigned Line, unsigned Col,
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MDNode *Scope, MDNode *InlinedAt = 0);
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/// getFromDILocation - Translate the DILocation quad into a DebugLoc.
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static DebugLoc getFromDILocation(MDNode *N);
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/// getFromDILexicalBlock - Translate the DILexicalBlock into a DebugLoc.
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static DebugLoc getFromDILexicalBlock(MDNode *N);
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/// isUnknown - Return true if this is an unknown location.
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bool isUnknown() const { return ScopeIdx == 0; }
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unsigned getLine() const {
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return (LineCol << 8) >> 8; // Mask out column.
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}
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unsigned getCol() const {
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return LineCol >> 24;
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}
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/// getScope - This returns the scope pointer for this DebugLoc, or null if
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/// invalid.
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MDNode *getScope(const LLVMContext &Ctx) const;
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/// getInlinedAt - This returns the InlinedAt pointer for this DebugLoc, or
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/// null if invalid or not present.
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MDNode *getInlinedAt(const LLVMContext &Ctx) const;
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/// getScopeAndInlinedAt - Return both the Scope and the InlinedAt values.
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void getScopeAndInlinedAt(MDNode *&Scope, MDNode *&IA,
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const LLVMContext &Ctx) const;
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/// getAsMDNode - This method converts the compressed DebugLoc node into a
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/// DILocation compatible MDNode.
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MDNode *getAsMDNode(const LLVMContext &Ctx) const;
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bool operator==(const DebugLoc &DL) const {
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return LineCol == DL.LineCol && ScopeIdx == DL.ScopeIdx;
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}
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bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
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void dump(const LLVMContext &Ctx) const;
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};
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template <>
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struct DenseMapInfo<DebugLoc> {
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static DebugLoc getEmptyKey() { return DebugLoc::getEmptyKey(); }
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static DebugLoc getTombstoneKey() { return DebugLoc::getTombstoneKey(); }
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static unsigned getHashValue(const DebugLoc &Key);
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static bool isEqual(DebugLoc LHS, DebugLoc RHS) { return LHS == RHS; }
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};
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} // end namespace llvm
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#endif /* LLVM_SUPPORT_DEBUGLOC_H */
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