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4bbf4ee149
isPodLike type trait. This is a generally useful type trait for more than just DenseMap, and we really care about whether something acts like a pod, not whether it really is a pod. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91421 91177308-0d34-0410-b5e6-96231b3b80d8
109 lines
3.5 KiB
C++
109 lines
3.5 KiB
C++
//===---- llvm/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_DEBUGLOC_H
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#define LLVM_DEBUGLOC_H
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#include "llvm/ADT/DenseMap.h"
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#include <vector>
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namespace llvm {
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class MDNode;
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/// DebugLocTuple - Debug location tuple of filename id, line and column.
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///
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struct DebugLocTuple {
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MDNode *Scope;
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MDNode *InlinedAtLoc;
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unsigned Line, Col;
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DebugLocTuple()
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: Scope(0), InlinedAtLoc(0), Line(~0U), Col(~0U) {}
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DebugLocTuple(MDNode *n, MDNode *i, unsigned l, unsigned c)
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: Scope(n), InlinedAtLoc(i), Line(l), Col(c) {}
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bool operator==(const DebugLocTuple &DLT) const {
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return Scope == DLT.Scope &&
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InlinedAtLoc == DLT.InlinedAtLoc &&
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Line == DLT.Line && Col == DLT.Col;
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}
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bool operator!=(const DebugLocTuple &DLT) const {
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return !(*this == DLT);
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}
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};
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/// DebugLoc - Debug location id. This is carried by SDNode and MachineInstr
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/// to index into a vector of unique debug location tuples.
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class DebugLoc {
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unsigned Idx;
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public:
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DebugLoc() : Idx(~0U) {} // Defaults to invalid.
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static DebugLoc getUnknownLoc() { DebugLoc L; L.Idx = ~0U; return L; }
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static DebugLoc get(unsigned idx) { DebugLoc L; L.Idx = idx; return L; }
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unsigned getIndex() const { return Idx; }
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/// isUnknown - Return true if there is no debug info for the SDNode /
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/// MachineInstr.
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bool isUnknown() const { return Idx == ~0U; }
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bool operator==(const DebugLoc &DL) const { return Idx == DL.Idx; }
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bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
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};
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// Specialize DenseMapInfo for DebugLocTuple.
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template<> struct DenseMapInfo<DebugLocTuple> {
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static inline DebugLocTuple getEmptyKey() {
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return DebugLocTuple(0, 0, ~0U, ~0U);
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}
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static inline DebugLocTuple getTombstoneKey() {
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return DebugLocTuple((MDNode*)~1U, (MDNode*)~1U, ~1U, ~1U);
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}
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static unsigned getHashValue(const DebugLocTuple &Val) {
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return DenseMapInfo<MDNode*>::getHashValue(Val.Scope) ^
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DenseMapInfo<MDNode*>::getHashValue(Val.InlinedAtLoc) ^
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DenseMapInfo<unsigned>::getHashValue(Val.Line) ^
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DenseMapInfo<unsigned>::getHashValue(Val.Col);
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}
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static bool isEqual(const DebugLocTuple &LHS, const DebugLocTuple &RHS) {
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return LHS.Scope == RHS.Scope &&
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LHS.InlinedAtLoc == RHS.InlinedAtLoc &&
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LHS.Line == RHS.Line &&
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LHS.Col == RHS.Col;
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}
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};
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template <> struct isPodLike<DebugLocTuple> {static const bool value = true;};
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/// DebugLocTracker - This class tracks debug location information.
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///
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struct DebugLocTracker {
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/// DebugLocations - A vector of unique DebugLocTuple's.
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///
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std::vector<DebugLocTuple> DebugLocations;
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/// DebugIdMap - This maps DebugLocTuple's to indices into the
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/// DebugLocations vector.
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DenseMap<DebugLocTuple, unsigned> DebugIdMap;
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DebugLocTracker() {}
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};
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} // end namespace llvm
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#endif /* LLVM_DEBUGLOC_H */
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