Merge DenseMapKeyInfo & DenseMapValueInfo into DenseMapInfo

Add a new DenseMapInfo::isEqual method to allow clients to redefine
the equality predicate used when probing the hash table.

llvm-svn: 42042

1 files changed, 11 insertions, 7 deletions

diff --git a/llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index 33489711388..c32457d6704 100644
--- a/llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -39,18 +39,22 @@ STATISTIC(NumSingleStore,   "Number of alloca's promoted with a single store");
 STATISTIC(NumDeadAlloca,    "Number of dead alloca's removed");
 STATISTIC(NumPHIInsert,     "Number of PHI nodes inserted");
 
-// Provide DenseMapKeyInfo for all pointers.
+// Provide DenseMapInfo for all pointers.
 namespace llvm {
 template<>
-struct DenseMapKeyInfo<std::pair<BasicBlock*, unsigned> > {
-  static inline std::pair<BasicBlock*, unsigned> getEmptyKey() {
-    return std::make_pair((BasicBlock*)-1, ~0U);
+struct DenseMapInfo<std::pair<BasicBlock*, unsigned> > {
+  typedef std::pair<BasicBlock*, unsigned> EltTy;
+  static inline EltTy getEmptyKey() {
+    return EltTy(reinterpret_cast<BasicBlock*>(-1), ~0U);
   }
-  static inline std::pair<BasicBlock*, unsigned> getTombstoneKey() {
-    return std::make_pair((BasicBlock*)-2, 0U);
+  static inline EltTy getTombstoneKey() {
+    return EltTy(reinterpret_cast<BasicBlock*>(-2), 0U);
   }
   static unsigned getHashValue(const std::pair<BasicBlock*, unsigned> &Val) {
-    return DenseMapKeyInfo<void*>::getHashValue(Val.first) + Val.second*2;
+    return DenseMapInfo<void*>::getHashValue(Val.first) + Val.second*2;
+  }
+  static bool isEqual(const EltTy &LHS, const EltTy &RHS) {
+    return LHS == RHS;
   }
   static bool isPod() { return true; }
 };