Move ARM to pluggable asmprinter

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54889 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMTargetMachine.cpp

@@ -31,6 +31,9 @@ static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
 static RegisterTarget<ARMTargetMachine>   X("arm",   "  ARM");
 static RegisterTarget<ThumbTargetMachine> Y("thumb", "  Thumb");
 
+// No assembler printer by default
+ARMTargetMachine::AsmPrinterCtorFn ARMTargetMachine::AsmPrinterCtor = 0;
+
 /// ThumbTargetMachine - Create an Thumb architecture model.
 ///
 unsigned ThumbTargetMachine::getJITMatchQuality() {
@@ -142,7 +145,10 @@ bool ARMTargetMachine::addPreEmitPass(PassManagerBase &PM, bool Fast) {
 bool ARMTargetMachine::addAssemblyEmitter(PassManagerBase &PM, bool Fast,
                                           std::ostream &Out) {
   // Output assembly language.
-  PM.add(createARMCodePrinterPass(Out, *this));
+  assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+  if (AsmPrinterCtor)
+    PM.add(AsmPrinterCtor(Out, *this));
+
   return false;
 }
 
@@ -154,8 +160,12 @@ bool ARMTargetMachine::addCodeEmitter(PassManagerBase &PM, bool Fast,
 
   // Machine code emitter pass for ARM.
   PM.add(createARMCodeEmitterPass(*this, MCE));
-  if (DumpAsm)
-    PM.add(createARMCodePrinterPass(*cerr.stream(), *this));
+  if (DumpAsm) {
+    assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+    if (AsmPrinterCtor)
+      PM.add(AsmPrinterCtor(*cerr.stream(), *this));
+  }
+
   return false;
 }
 
@@ -163,7 +173,11 @@ bool ARMTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM, bool Fast,
                                         bool DumpAsm, MachineCodeEmitter &MCE) {
   // Machine code emitter pass for ARM.
   PM.add(createARMCodeEmitterPass(*this, MCE));
-  if (DumpAsm)
-    PM.add(createARMCodePrinterPass(*cerr.stream(), *this));
+  if (DumpAsm) {
+    assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+    if (AsmPrinterCtor)
+      PM.add(AsmPrinterCtor(*cerr.stream(), *this));
+  }
+
   return false;
 }

lib/Target/ARM/ARMTargetMachine.h

@@ -35,6 +35,13 @@ class ARMTargetMachine : public LLVMTargetMachine {
   ARMJITInfo        JITInfo;
   ARMTargetLowering TLInfo;
 
+protected:
+  // To avoid having target depend on the asmprinter stuff libraries, asmprinter
+  // set this functions to ctor pointer at startup time if they are linked in.
+  typedef FunctionPass *(*AsmPrinterCtorFn)(std::ostream &o,
+                                            ARMTargetMachine &tm);
+  static AsmPrinterCtorFn AsmPrinterCtor;
+
 public:
   ARMTargetMachine(const Module &M, const std::string &FS, bool isThumb = false);
 
@@ -46,18 +53,23 @@ public:
   }
   virtual const TargetData       *getTargetData() const { return &DataLayout; }
   virtual const ARMSubtarget  *getSubtargetImpl() const { return &Subtarget; }
-  virtual       ARMTargetLowering *getTargetLowering() const { 
-    return const_cast<ARMTargetLowering*>(&TLInfo); 
+  virtual       ARMTargetLowering *getTargetLowering() const {
+    return const_cast<ARMTargetLowering*>(&TLInfo);
   }
+
+  static void registerAsmPrinter(AsmPrinterCtorFn F) {
+    AsmPrinterCtor = F;
+  }
+
   static unsigned getModuleMatchQuality(const Module &M);
   static unsigned getJITMatchQuality();
 
   virtual const TargetAsmInfo *createTargetAsmInfo() const;
-  
+
   // Pass Pipeline Configuration
   virtual bool addInstSelector(PassManagerBase &PM, bool Fast);
   virtual bool addPreEmitPass(PassManagerBase &PM, bool Fast);
-  virtual bool addAssemblyEmitter(PassManagerBase &PM, bool Fast, 
+  virtual bool addAssemblyEmitter(PassManagerBase &PM, bool Fast,
                                   std::ostream &Out);
   virtual bool addCodeEmitter(PassManagerBase &PM, bool Fast,
                               bool DumpAsm, MachineCodeEmitter &MCE);

lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp

@@ -174,16 +174,6 @@ namespace {
 
 #include "ARMGenAsmWriter.inc"
 
-/// createARMCodePrinterPass - Returns a pass that prints the ARM
-/// assembly code for a MachineFunction to the given output stream,
-/// using the given target machine description.  This should work
-/// regardless of whether the function is in SSA form.
-///
-FunctionPass *llvm::createARMCodePrinterPass(std::ostream &o,
-                                             ARMTargetMachine &tm) {
-  return new ARMAsmPrinter(o, tm, tm.getTargetAsmInfo());
-}
-
 // Substitute old hook with new one temporary
 std::string ARMAsmPrinter::getSectionForFunction(const Function &F) const {
   return TAI->SectionForGlobal(&F);
@@ -1028,3 +1018,21 @@ bool ARMAsmPrinter::doFinalization(Module &M) {
 
   return AsmPrinter::doFinalization(M);
 }
+
+/// createARMCodePrinterPass - Returns a pass that prints the ARM
+/// assembly code for a MachineFunction to the given output stream,
+/// using the given target machine description.  This should work
+/// regardless of whether the function is in SSA form.
+///
+FunctionPass *llvm::createARMCodePrinterPass(std::ostream &o,
+                                             ARMTargetMachine &tm) {
+  return new ARMAsmPrinter(o, tm, tm.getTargetAsmInfo());
+}
+
+namespace {
+  static struct Register {
+    Register() {
+      ARMTargetMachine::registerAsmPrinter(createARMCodePrinterPass);
+    }
+  } Registrator;
+}

lib/Target/ARM/AsmPrinter/Makefile

@@ -0,0 +1,15 @@
+##===- lib/Target/X86/Makefile -----------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+LEVEL = ../../../..
+LIBRARYNAME = LLVMARMAsmPrinter
+
+# Hack: we need to include 'main' x86 target directory to grab private headers 
+CPPFLAGS = -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
+
+include $(LEVEL)/Makefile.common

lib/Target/ARM/Makefile

@@ -8,7 +8,7 @@
 ##===----------------------------------------------------------------------===##
 
 LEVEL = ../../..
-LIBRARYNAME = LLVMARM
+LIBRARYNAME = LLVMARMCodeGen
 TARGET = ARM
 
 # Make sure that tblgen is run, first thing.
@@ -17,4 +17,6 @@ BUILT_SOURCES = ARMGenRegisterInfo.h.inc ARMGenRegisterNames.inc \
                 ARMGenInstrInfo.inc ARMGenAsmWriter.inc \
                 ARMGenDAGISel.inc ARMGenSubtarget.inc
 
+DIRS = AsmPrinter
+
 include $(LEVEL)/Makefile.common