Add constructor to create MDString using std::string

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74133 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h
index 52fff2020c74513b74ff5676e5b9fb443f9a6208..da69d25cf621fbc5a1652b28badd3cb2d5188785 100644 (file)
--- a/include/llvm/Constants.h
+++ b/include/llvm/Constants.h
@@ -865,6 +865,7 @@ public:
   /// get() - Static factory methods - Return objects of the specified value.
   ///
   static MDString *get(const char *StrBegin, const char *StrEnd);
+  static MDString *get(const std::string &Str);
 
   /// size() - The length of this string.
   ///

diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index c164a3b0c2caeeaa02078a39fd749682b08c3cc6..ba8ab2e392f390ca38e29d3906c3f5ba64c6e7d1 100644 (file)
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -1803,6 +1803,17 @@ MDString *MDString::get(const char *StrBegin, const char *StrEnd) {
   return S;
 }
 
+MDString *MDString::get(const std::string &Str) {
+  sys::SmartScopedWriter<true> Writer(&*ConstantsLock);
+  StringMapEntry<MDString *> &Entry = MDStringCache->GetOrCreateValue(
+                                        Str.data(), Str.data() + Str.size());
+  MDString *&S = Entry.getValue();
+  if (!S) S = new MDString(Entry.getKeyData(),
+                           Entry.getKeyData() + Entry.getKeyLength());
+
+  return S;
+}
+
 void MDString::destroyConstant() {
   sys::SmartScopedWriter<true> Writer(&*ConstantsLock);
   MDStringCache->erase(MDStringCache->find(StrBegin, StrEnd));