[AVR] Add AVRMCTargetDesc.cpp

Summary:
This adds the AVRMCTargetDesc file in tree. It allows creation of the
core classes used in the backend.

Reviewers: arsenm, kparzysz

Subscribers: wdng, beanz, mgorny

Differential Revision: https://reviews.llvm.org/D25023

llvm-svn: 282597

Author: Dylan McKay

llvm/lib/Target/AVR/MCTargetDesc/AVRMCTargetDesc.cpp

@@ -0,0 +1,96 @@
+//===-- AVRMCTargetDesc.cpp - AVR Target Descriptions ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides AVR specific target descriptions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AVRELFStreamer.h"
+#include "AVRMCAsmInfo.h"
+#include "AVRMCTargetDesc.h"
+#include "AVRTargetStreamer.h"
+
+#include "llvm/MC/MCELFStreamer.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/TargetRegistry.h"
+
+#define GET_INSTRINFO_MC_DESC
+#include "AVRGenInstrInfo.inc"
+
+#define GET_SUBTARGETINFO_MC_DESC
+#include "AVRGenSubtargetInfo.inc"
+
+#define GET_REGINFO_MC_DESC
+#include "AVRGenRegisterInfo.inc"
+
+static MCInstrInfo *createAVRMCInstrInfo() {
+  MCInstrInfo *X = new MCInstrInfo();
+  InitAVRMCInstrInfo(X);
+
+  return X;
+}
+
+static MCRegisterInfo *createAVRMCRegisterInfo(const Triple &TT) {
+  MCRegisterInfo *X = new MCRegisterInfo();
+  InitAVRMCRegisterInfo(X, 0);
+
+  return X;
+}
+
+static MCSubtargetInfo *createAVRMCSubtargetInfo(const Triple &TT,
+                                                 StringRef CPU, StringRef FS) {
+  return createAVRMCSubtargetInfoImpl(TT, CPU, FS);
+}
+
+static MCStreamer *createMCStreamer(const Triple &T, MCContext &Context,
+                                    MCAsmBackend &MAB, raw_pwrite_stream &OS,
+                                    MCCodeEmitter *Emitter, bool RelaxAll) {
+  return createELFStreamer(Context, MAB, OS, Emitter, RelaxAll);
+}
+
+static MCTargetStreamer *
+createAVRObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
+  return new AVRELFStreamer(S, STI);
+}
+
+static MCTargetStreamer *createMCAsmTargetStreamer(MCStreamer &S,
+                                                   formatted_raw_ostream &OS,
+                                                   MCInstPrinter *InstPrint,
+                                                   bool isVerboseAsm) {
+  return new AVRTargetAsmStreamer(S);
+}
+
+extern "C" void LLVMInitializeAVRTargetMC() {
+  // Register the MC asm info.
+  RegisterMCAsmInfo<AVRMCAsmInfo> X(TheAVRTarget);
+
+  // Register the MC instruction info.
+  TargetRegistry::RegisterMCInstrInfo(TheAVRTarget, createAVRMCInstrInfo);
+
+  // Register the MC register info.
+  TargetRegistry::RegisterMCRegInfo(TheAVRTarget, createAVRMCRegisterInfo);
+
+  // Register the MC subtarget info.
+  TargetRegistry::RegisterMCSubtargetInfo(TheAVRTarget,
+                                          createAVRMCSubtargetInfo);
+
+  // Register the ELF streamer
+  TargetRegistry::RegisterELFStreamer(TheAVRTarget, createMCStreamer);
+
+  // Register the obj target streamer.
+  TargetRegistry::RegisterObjectTargetStreamer(TheAVRTarget,
+                                               createAVRObjectTargetStreamer);
+
+  // Register the asm target streamer.
+  TargetRegistry::RegisterAsmTargetStreamer(TheAVRTarget,
+                                            createMCAsmTargetStreamer);
+}
+

llvm/lib/Target/AVR/MCTargetDesc/CMakeLists.txt

@@ -2,6 +2,7 @@ add_llvm_library(LLVMAVRDesc
   AVRELFStreamer.cpp
   AVRMCAsmInfo.cpp
   AVRMCExpr.cpp
+  AVRMCTargetDesc.cpp
   AVRTargetStreamer.cpp
 )
 

llvm/lib/Target/AVR/TargetInfo/AVRTargetInfo.cpp

@@ -19,7 +19,3 @@ extern "C" void LLVMInitializeAVRTargetInfo() {
       llvm::TheAVRTarget, "avr", "Atmel AVR Microcontroller");
 }
 
-// FIXME: Temporary stub - this function must be defined for linking
-// to succeed. Remove once this function is properly implemented.
-extern "C" void LLVMInitializeAVRTargetMC() {
-}