Replace the BUILTIN_EXPECT macro with a less horrible LLVM_LIKELY/LLVM_UNLIKELY inter...

[oota-llvm.git] / include / llvm / Support / DebugLoc.h

diff --git a/include/llvm/Support/DebugLoc.h b/include/llvm/Support/DebugLoc.h
index ccc344612913d7c77df8d293071a1de874a013c5..049807570711442dbb3ecb97f180f255143108a4 100644 (file)
--- a/include/llvm/Support/DebugLoc.h
+++ b/include/llvm/Support/DebugLoc.h
@@ -16,6 +16,7 @@
 #define LLVM_SUPPORT_DEBUGLOC_H
 
 namespace llvm {
+  template <typename T> struct DenseMapInfo;
   class MDNode;
   class LLVMContext;
   
@@ -23,6 +24,24 @@ namespace llvm {
   /// 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.
@@ -41,7 +60,10 @@ namespace llvm {
     
     /// 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; }
     
@@ -74,6 +96,16 @@ namespace llvm {
       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