MCAsmBackend.h - cleanup includes and forward declarations. NFC.

Replace StringRef.h include to forward declaration
Remove MCFragment/MCRelaxableFragment forward declarations - these are included in MCFragment.h

diff --git a/llvm/include/llvm/MC/MCAsmBackend.h b/llvm/include/llvm/MC/MCAsmBackend.h
index 9b67c92..c24e7c9 100644 (file)
--- a/llvm/include/llvm/MC/MCAsmBackend.h
+++ b/llvm/include/llvm/MC/MCAsmBackend.h
@@ -11,7 +11,6 @@
 
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Optional.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/MC/MCDirectives.h"
 #include "llvm/MC/MCFixup.h"
 #include "llvm/MC/MCFragment.h"
@@ -24,15 +23,14 @@ class MCAsmLayout;
 class MCAssembler;
 class MCCFIInstruction;
 struct MCFixupKindInfo;
-class MCFragment;
 class MCInst;
 class MCObjectStreamer;
 class MCObjectTargetWriter;
 class MCObjectWriter;
-class MCRelaxableFragment;
 class MCSubtargetInfo;
 class MCValue;
 class raw_pwrite_stream;
+class StringRef;
 
 /// Generic interface to target specific assembler backends.
 class MCAsmBackend {