[Layering] Move DebugLoc.h into the IR library. The implementation

already lived there and it is where it belongs -- this is the in-memory
debug location representation.

This is just cleanup -- Modules can actually cope with this, but that
doesn't make it right. After chatting with folks that have out-of-tree
stuff, going ahead and moving the rest of the headers seems preferable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202960 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 121 insertions, 1 deletions

diff --git a/include/llvm/IR/DebugLoc.h b/include/llvm/IR/DebugLoc.h
new file mode 100644
index 0000000000..50b5d5420d
--- /dev/null
+++ b/include/llvm/IR/DebugLoc.h
@@ -0,0 +1,120 @@
+//===- 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_IR_DEBUGLOC_H
+#define LLVM_IR_DEBUGLOC_H
+
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+  template <typename T> struct DenseMapInfo;
+  class MDNode;
+  class LLVMContext;
+
+  /// DebugLoc - Debug location id.  This is carried by Instruction, SDNode,
+  /// and MachineInstr to compactly encode file/line/scope information for an
+  /// operation.
+  class DebugLoc {
+    friend struct DenseMapInfo<DebugLoc>;
+
+    /// getEmptyKey() - A private constructor that returns an unknown that is
+    /// not equal to the tombstone key or DebugLoc().
+    static DebugLoc getEmptyKey() {
+      DebugLoc DL;
+      DL.LineCol = 1;
+      return DL;
+    }
+
+    /// getTombstoneKey() - A private constructor that returns an unknown that
+    /// is not equal to the empty key or DebugLoc().
+    static DebugLoc getTombstoneKey() {
+      DebugLoc DL;
+      DL.LineCol = 2;
+      return DL;
+    }
+
+    /// LineCol - This 32-bit value encodes the line and column number for the
+    /// location, encoded as 24-bits for line and 8 bits for col.  A value of 0
+    /// for either means unknown.
+    uint32_t LineCol;
+
+    /// ScopeIdx - This is an opaque ID# for Scope/InlinedAt information,
+    /// decoded by LLVMContext.  0 is unknown.
+    int ScopeIdx;
+  public:
+    DebugLoc() : LineCol(0), ScopeIdx(0) {}  // Defaults to unknown.
+
+    /// get - Get a new DebugLoc that corresponds to the specified line/col
+    /// scope/inline location.
+    static DebugLoc get(unsigned Line, unsigned Col,
+                        MDNode *Scope, MDNode *InlinedAt = 0);
+
+    /// getFromDILocation - Translate the DILocation quad into a DebugLoc.
+    static DebugLoc getFromDILocation(MDNode *N);
+
+    /// getFromDILexicalBlock - Translate the DILexicalBlock into a DebugLoc.
+    static DebugLoc getFromDILexicalBlock(MDNode *N);
+
+    /// isUnknown - Return true if this is an unknown location.
+    bool isUnknown() const { return ScopeIdx == 0; }
+
+    unsigned getLine() const {
+      return (LineCol << 8) >> 8;  // Mask out column.
+    }
+
+    unsigned getCol() const {
+      return LineCol >> 24;
+    }
+
+    /// getScope - This returns the scope pointer for this DebugLoc, or null if
+    /// invalid.
+    MDNode *getScope(const LLVMContext &Ctx) const;
+
+    /// getInlinedAt - This returns the InlinedAt pointer for this DebugLoc, or
+    /// null if invalid or not present.
+    MDNode *getInlinedAt(const LLVMContext &Ctx) const;
+
+    /// getScopeAndInlinedAt - Return both the Scope and the InlinedAt values.
+    void getScopeAndInlinedAt(MDNode *&Scope, MDNode *&IA,
+                              const LLVMContext &Ctx) const;
+
+    /// getScopeNode - Get MDNode for DebugLoc's scope, or null if invalid.
+    MDNode *getScopeNode(const LLVMContext &Ctx) const;
+
+    // getFnDebugLoc - Walk up the scope chain of given debug loc and find line
+    // number info for the function.
+    DebugLoc getFnDebugLoc(const LLVMContext &Ctx);
+
+    /// getAsMDNode - This method converts the compressed DebugLoc node into a
+    /// DILocation compatible MDNode.
+    MDNode *getAsMDNode(const LLVMContext &Ctx) const;
+
+    bool operator==(const DebugLoc &DL) const {
+      return LineCol == DL.LineCol && ScopeIdx == DL.ScopeIdx;
+    }
+    bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
+
+    void dump(const LLVMContext &Ctx) const;
+  };
+
+  template <>
+  struct DenseMapInfo<DebugLoc> {
+    static DebugLoc getEmptyKey() { return DebugLoc::getEmptyKey(); }
+    static DebugLoc getTombstoneKey() { return DebugLoc::getTombstoneKey(); }
+    static unsigned getHashValue(const DebugLoc &Key);
+    static bool isEqual(DebugLoc LHS, DebugLoc RHS) { return LHS == RHS; }
+  };
+} // end namespace llvm
+
+#endif /* LLVM_SUPPORT_DEBUGLOC_H */
diff --git a/include/llvm/IR/Instruction.h b/include/llvm/IR/Instruction.h
index 8ba8b9c4f1..10742f153b 100644
--- a/include/llvm/IR/Instruction.h
+++ b/include/llvm/IR/Instruction.h
@@ -17,8 +17,8 @@
 
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/ilist_node.h"
+#include "llvm/IR/DebugLoc.h"
 #include "llvm/IR/User.h"
-#include "llvm/Support/DebugLoc.h"
 
 namespace llvm {