Don't pass target name into TargetData anymore, it is never used or needed.
Remove explicit casts to std::string now that there is no overload resolution
issues in the TargetData ctors.

llvm-svn: 28830
diff --git a/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp b/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp
index f7fd8e0..df94d6f 100644
--- a/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp
+++ b/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp
@@ -54,8 +54,7 @@
 }
 
 AlphaTargetMachine::AlphaTargetMachine(const Module &M, const std::string &FS)
-  : TargetMachine("alpha"),
-    DataLayout(std::string("alpha"), std::string("e")),
+  : TargetMachine("alpha"), DataLayout("e"),
     FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
     JITInfo(*this),
     Subtarget(M, FS)