Add ObjC constant string support for NeXT.

Changed CGObjCRuntime::GenerateConstantString interface to take
       std::string instead of char* and size.

Change ObjC functions which call on GenerateConstantString to bitcast
       result to appropriate type.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54659 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index e152488..6a8fe3c 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -20,9 +20,10 @@
 using namespace CodeGen;
 
 /// Emits an instance of NSConstantString representing the object.
-llvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E){
-  return CGM.getObjCRuntime().GenerateConstantString(
-      E->getString()->getStrData(), E->getString()->getByteLength());
+llvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E) {
+  std::string String(E->getString()->getStrData(), E->getString()->getByteLength());
+  llvm::Constant *C = CGM.getObjCRuntime().GenerateConstantString(String);
+  return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType()));
 }
 
 /// Emit a selector.