Introduce MCCodeGenInfo, which keeps information that can affect codegen
(including compilation, assembly). Move relocation model Reloc::Model from
TargetMachine to MCCodeGenInfo so it's accessible even without TargetMachine.

llvm-svn: 135468
diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp
index d9a5fa2..ebebcdc 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp
@@ -15,7 +15,7 @@
 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
 
 #include "llvm/Target/TargetAsmLexer.h"
-#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachine.h"  // FIXME
 #include "llvm/Target/TargetRegistry.h"
 
 #include "llvm/ADT/OwningPtr.h"