[X86][PKU] Add {RD,WR}PKRU encoding

[oota-llvm.git] / include / llvm / ADT / DenseSet.h

diff --git a/include/llvm/ADT/DenseSet.h b/include/llvm/ADT/DenseSet.h
index 37a81b0c7ee2d70918897f8daec38c287d6be407..ef09dce379801f734a5282b5389a0bb203203094 100644 (file)
--- a/include/llvm/ADT/DenseSet.h
+++ b/include/llvm/ADT/DenseSet.h
@@ -18,18 +18,35 @@
 
 namespace llvm {
 
+namespace detail {
+struct DenseSetEmpty {};
+
+// Use the empty base class trick so we can create a DenseMap where the buckets
+// contain only a single item.
+template <typename KeyT> class DenseSetPair : public DenseSetEmpty {
+  KeyT key;
+
+public:
+  KeyT &getFirst() { return key; }
+  const KeyT &getFirst() const { return key; }
+  DenseSetEmpty &getSecond() { return *this; }
+  const DenseSetEmpty &getSecond() const { return *this; }
+};
+}
+
 /// DenseSet - This implements a dense probed hash-table based set.
-///
-/// FIXME: This is currently implemented directly in terms of DenseMap, this
-/// should be optimized later if there is a need.
 template<typename ValueT, typename ValueInfoT = DenseMapInfo<ValueT> >
 class DenseSet {
-  typedef DenseMap<ValueT, char, ValueInfoT> MapTy;
+  typedef DenseMap<ValueT, detail::DenseSetEmpty, ValueInfoT,
+                   detail::DenseSetPair<ValueT>> MapTy;
+  static_assert(sizeof(typename MapTy::value_type) == sizeof(ValueT),
+                "DenseMap buckets unexpectedly large!");
   MapTy TheMap;
+
 public:
   typedef ValueT key_type;
   typedef ValueT value_type;
-  typedef unsigned size_type;\r
+  typedef unsigned size_type;
 
   explicit DenseSet(unsigned NumInitBuckets = 0) : TheMap(NumInitBuckets) {}
 
@@ -45,7 +62,7 @@ public:
     TheMap.clear();
   }
 
-  /// Return 1 if the specified key is in the set, 0 otherwise.\r
+  /// Return 1 if the specified key is in the set, 0 otherwise.
   size_type count(const ValueT &V) const {
     return TheMap.count(V);
   }
@@ -63,6 +80,7 @@ public:
   class Iterator {
     typename MapTy::iterator I;
     friend class DenseSet;
+
   public:
     typedef typename MapTy::iterator::difference_type difference_type;
     typedef ValueT value_type;
@@ -72,8 +90,8 @@ public:
 
     Iterator(const typename MapTy::iterator &i) : I(i) {}
 
-    ValueT& operator*() { return I->first; }
-    ValueT* operator->() { return &I->first; }
+    ValueT &operator*() { return I->getFirst(); }
+    ValueT *operator->() { return &I->getFirst(); }
 
     Iterator& operator++() { ++I; return *this; }
     bool operator==(const Iterator& X) const { return I == X.I; }
@@ -83,6 +101,7 @@ public:
   class ConstIterator {
     typename MapTy::const_iterator I;
     friend class DenseSet;
+
   public:
     typedef typename MapTy::const_iterator::difference_type difference_type;
     typedef ValueT value_type;
@@ -92,8 +111,8 @@ public:
 
     ConstIterator(const typename MapTy::const_iterator &i) : I(i) {}
 
-    const ValueT& operator*() { return I->first; }
-    const ValueT* operator->() { return &I->first; }
+    const ValueT &operator*() { return I->getFirst(); }
+    const ValueT *operator->() { return &I->getFirst(); }
 
     ConstIterator& operator++() { ++I; return *this; }
     bool operator==(const ConstIterator& X) const { return I == X.I; }
@@ -110,13 +129,29 @@ public:
   const_iterator end() const { return ConstIterator(TheMap.end()); }
 
   iterator find(const ValueT &V) { return Iterator(TheMap.find(V)); }
+
+  /// Alternative version of find() which allows a different, and possibly less
+  /// expensive, key type.
+  /// The DenseMapInfo is responsible for supplying methods
+  /// getHashValue(LookupKeyT) and isEqual(LookupKeyT, KeyT) for each key type
+  /// used.
+  template <class LookupKeyT>
+  iterator find_as(const LookupKeyT &Val) {
+    return Iterator(TheMap.find_as(Val));
+  }
+  template <class LookupKeyT>
+  const_iterator find_as(const LookupKeyT &Val) const {
+    return ConstIterator(TheMap.find_as(Val));
+  }
+
   void erase(Iterator I) { return TheMap.erase(I.I); }
   void erase(ConstIterator CI) { return TheMap.erase(CI.I); }
 
   std::pair<iterator, bool> insert(const ValueT &V) {
-    return TheMap.insert(std::make_pair(V, 0));
+    detail::DenseSetEmpty Empty;
+    return TheMap.insert(std::make_pair(V, Empty));
   }
-  
+
   // Range insertion of values.
   template<typename InputIt>
   void insert(InputIt I, InputIt E) {