mv CodeGen/DebugLoc.h Support/DebugLoc.h

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73786 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/DebugLoc.h

@@ -0,0 +1,101 @@
+//===---- llvm/DebugLoc.h - Debug Location Information ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a number of light weight data structures used
+// to describe and track debug location information.
+// 
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGLOC_H
+#define LLVM_DEBUGLOC_H
+
+#include "llvm/ADT/DenseMap.h"
+#include <vector>
+
+namespace llvm {
+  class GlobalVariable;
+
+  /// DebugLocTuple - Debug location tuple of filename id, line and column.
+  ///
+  struct DebugLocTuple {
+    GlobalVariable *CompileUnit;
+    unsigned Line, Col;
+
+    DebugLocTuple(GlobalVariable *v, unsigned l, unsigned c)
+      : CompileUnit(v), Line(l), Col(c) {};
+
+    bool operator==(const DebugLocTuple &DLT) const {
+      return CompileUnit == DLT.CompileUnit &&
+             Line == DLT.Line && Col == DLT.Col;
+    }
+    bool operator!=(const DebugLocTuple &DLT) const {
+      return !(*this == DLT);
+    }
+  };
+
+  /// DebugLoc - Debug location id. This is carried by SDNode and MachineInstr
+  /// to index into a vector of unique debug location tuples.
+  class DebugLoc {
+    unsigned Idx;
+
+  public:
+    DebugLoc() : Idx(~0U) {}  // Defaults to invalid.
+
+    static DebugLoc getUnknownLoc()   { DebugLoc L; L.Idx = ~0U; return L; }
+    static DebugLoc get(unsigned idx) { DebugLoc L; L.Idx = idx; return L; }
+
+    unsigned getIndex() const { return Idx; }
+
+    /// isUnknown - Return true if there is no debug info for the SDNode /
+    /// MachineInstr.
+    bool isUnknown() const { return Idx == ~0U; }
+
+    bool operator==(const DebugLoc &DL) const { return Idx == DL.Idx; }
+    bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
+  };
+
+  // Partially specialize DenseMapInfo for DebugLocTyple.
+  template<>  struct DenseMapInfo<DebugLocTuple> {
+    static inline DebugLocTuple getEmptyKey() {
+      return DebugLocTuple(0, ~0U, ~0U);
+    }
+    static inline DebugLocTuple getTombstoneKey() {
+      return DebugLocTuple((GlobalVariable*)~1U, ~1U, ~1U);
+    }
+    static unsigned getHashValue(const DebugLocTuple &Val) {
+      return DenseMapInfo<GlobalVariable*>::getHashValue(Val.CompileUnit) ^
+             DenseMapInfo<unsigned>::getHashValue(Val.Line) ^
+             DenseMapInfo<unsigned>::getHashValue(Val.Col);
+    }
+    static bool isEqual(const DebugLocTuple &LHS, const DebugLocTuple &RHS) {
+      return LHS.CompileUnit == RHS.CompileUnit &&
+             LHS.Line        == RHS.Line &&
+             LHS.Col         == RHS.Col;
+    }
+
+    static bool isPod() { return true; }
+  };
+
+  /// DebugLocTracker - This class tracks debug location information.
+  ///
+  struct DebugLocTracker {
+    /// DebugLocations - A vector of unique DebugLocTuple's.
+    ///
+    std::vector<DebugLocTuple> DebugLocations;
+
+    /// DebugIdMap - This maps DebugLocTuple's to indices into the
+    /// DebugLocations vector.
+    DenseMap<DebugLocTuple, unsigned> DebugIdMap;
+
+    DebugLocTracker() {}
+  };
+  
+} // end namespace llvm
+
+#endif /* LLVM_DEBUGLOC_H */