Check in LLVM r95781.

1 files changed, 35 insertions, 0 deletions

diff --git a/lib/Support/StringPool.cpp b/lib/Support/StringPool.cpp
new file mode 100644
index 0000000..1ee917f
--- /dev/null
+++ b/lib/Support/StringPool.cpp
@@ -0,0 +1,35 @@
+//===-- StringPool.cpp - Interned string pool -----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the StringPool class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/StringPool.h"
+#include "llvm/ADT/StringRef.h"
+
+using namespace llvm;
+
+StringPool::StringPool() {}
+
+StringPool::~StringPool() {
+  assert(InternTable.empty() && "PooledStringPtr leaked!");
+}
+
+PooledStringPtr StringPool::intern(const StringRef &Key) {
+  table_t::iterator I = InternTable.find(Key);
+  if (I != InternTable.end())
+    return PooledStringPtr(&*I);
+  
+  entry_t *S = entry_t::Create(Key.begin(), Key.end());
+  S->getValue().Pool = this;
+  InternTable.insert(S);
+  
+  return PooledStringPtr(S);
+}