Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down
to MCRegisterInfo. Also initialize the mapping at construction time.

This patch eliminate TargetRegisterInfo from TargetAsmInfo. It's another step
towards fixing the layering violation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135424 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCDisassembler/EDDisassembler.cpp b/lib/MC/MCDisassembler/EDDisassembler.cpp
index bdd99af..2e52bec 100644
--- a/lib/MC/MCDisassembler/EDDisassembler.cpp
+++ b/lib/MC/MCDisassembler/EDDisassembler.cpp
@@ -22,6 +22,7 @@
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCParser/AsmLexer.h"
@@ -108,6 +109,7 @@
   InitializeAllTargetInfos();
   InitializeAllTargets();
   InitializeAllMCAsmInfos();
+  InitializeAllMCRegisterInfos();
   InitializeAllAsmPrinters();
   InitializeAllAsmParsers();
   InitializeAllDisassemblers();
@@ -186,6 +188,11 @@
   if (!AsmInfo)
     return;
 
+  MRI.reset(Tgt->createMCRegInfo(tripleString));
+
+  if (!MRI)
+    return;
+
   Disassembler.reset(Tgt->createMCDisassembler());
   
   if (!Disassembler)
@@ -368,7 +375,7 @@
   SourceMgr sourceMgr;
   sourceMgr.setDiagHandler(diag_handler, static_cast<void*>(this));
   sourceMgr.AddNewSourceBuffer(buf, SMLoc()); // ownership of buf handed over
-  MCContext context(*AsmInfo, NULL);
+  MCContext context(*AsmInfo, *MRI, NULL);
   OwningPtr<MCStreamer> streamer(createNullStreamer(context));
   OwningPtr<MCAsmParser> genericParser(createMCAsmParser(*Tgt, sourceMgr,
                                                          context, *streamer,