Unbreak cyclic deps

llvm-svn: 73781

3 files changed, 41 insertions, 16 deletions

diff --git a/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp b/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp
index 66f72577044..cdd4fa4b244 100644
--- a/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp
+++ b/llvm/lib/Target/Alpha/AlphaTargetMachine.cpp
@@ -21,16 +21,12 @@
 
 using namespace llvm;
 
-/// AlphaTargetMachineModule - Note that this is used on hosts that cannot link
-/// in a library unless there are references into the library.  In particular,
-/// it seems that it is not possible to get things to work on Win32 without
-/// this.  Though it is unused, do not remove it.
-extern "C" int AlphaTargetMachineModule;
-int AlphaTargetMachineModule = 0;
-
 // Register the targets
 static RegisterTarget<AlphaTargetMachine> X("alpha", "Alpha [experimental]");
 
+// No assembler printer by default
+AlphaTargetMachine::AsmPrinterCtorFn AlphaTargetMachine::AsmPrinterCtor = 0;
+
 // Force static initialization when called from llvm/InitializeAllTargets.h
 namespace llvm {
   void InitializeAlphaTarget() { }
@@ -97,23 +93,32 @@ bool AlphaTargetMachine::addAssemblyEmitter(PassManagerBase &PM,
                                             bool Verbose,
                                             raw_ostream &Out) {
   PM.add(createAlphaLLRPPass(*this));
-  PM.add(createAlphaCodePrinterPass(Out, *this, OptLevel, Verbose));
+  // Output assembly language.
+  assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+  if (AsmPrinterCtor)
+    PM.add(AsmPrinterCtor(Out, *this, OptLevel, Verbose));
   return false;
 }
 bool AlphaTargetMachine::addCodeEmitter(PassManagerBase &PM,
                                         CodeGenOpt::Level OptLevel,
                                         bool DumpAsm, MachineCodeEmitter &MCE) {
   PM.add(createAlphaCodeEmitterPass(*this, MCE));
-  if (DumpAsm)
-    PM.add(createAlphaCodePrinterPass(errs(), *this, OptLevel, true));
+  if (DumpAsm) {
+    assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+    if (AsmPrinterCtor)
+      PM.add(AsmPrinterCtor(errs(), *this, OptLevel, true));
+  }
   return false;
 }
 bool AlphaTargetMachine::addCodeEmitter(PassManagerBase &PM,
                                         CodeGenOpt::Level OptLevel,
                                         bool DumpAsm, JITCodeEmitter &JCE) {
   PM.add(createAlphaJITCodeEmitterPass(*this, JCE));
-  if (DumpAsm)
-    PM.add(createAlphaCodePrinterPass(errs(), *this, OptLevel, true));
+  if (DumpAsm) {
+    assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+    if (AsmPrinterCtor)
+      PM.add(AsmPrinterCtor(errs(), *this, OptLevel, true));
+  }
   return false;
 }
 bool AlphaTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
diff --git a/llvm/lib/Target/Alpha/AlphaTargetMachine.h b/llvm/lib/Target/Alpha/AlphaTargetMachine.h
index 51224e80de7..946ca559ca0 100644
--- a/llvm/lib/Target/Alpha/AlphaTargetMachine.h
+++ b/llvm/lib/Target/Alpha/AlphaTargetMachine.h
@@ -33,10 +33,18 @@ class AlphaTargetMachine : public LLVMTargetMachine {
   AlphaJITInfo JITInfo;
   AlphaSubtarget Subtarget;
   AlphaTargetLowering TLInfo;
-  
+
 protected:
   virtual const TargetAsmInfo *createTargetAsmInfo() const;
-  
+
+  // 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)(raw_ostream &o,
+                                            TargetMachine &tm,
+                                            CodeGenOpt::Level OptLevel,
+                                            bool verbose);
+  static AsmPrinterCtorFn AsmPrinterCtor;
+
 public:
   AlphaTargetMachine(const Module &M, const std::string &FS);
 
@@ -46,7 +54,7 @@ public:
   virtual const AlphaRegisterInfo *getRegisterInfo() const {
     return &InstrInfo.getRegisterInfo();
   }
-  virtual AlphaTargetLowering* getTargetLowering() const { 
+  virtual AlphaTargetLowering* getTargetLowering() const {
     return const_cast<AlphaTargetLowering*>(&TLInfo);
   }
   virtual const TargetData       *getTargetData() const { return &DataLayout; }
@@ -56,7 +64,7 @@ public:
 
   static unsigned getJITMatchQuality();
   static unsigned getModuleMatchQuality(const Module &M);
-  
+
   // Pass Pipeline Configuration
   virtual bool addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
   virtual bool addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel);
@@ -75,6 +83,10 @@ public:
                                     CodeGenOpt::Level OptLevel,
                                     bool DumpAsm,
                                     JITCodeEmitter &JCE);
+
+  static void registerAsmPrinter(AsmPrinterCtorFn F) {
+    AsmPrinterCtor = F;
+  }
 };
 
 } // end namespace llvm
diff --git a/llvm/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp b/llvm/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp
index e8687f59612..7b73bb302c3 100644
--- a/llvm/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp
+++ b/llvm/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp
@@ -309,3 +309,11 @@ bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
 namespace llvm {
   void InitializeAlphaAsmPrinter() { }
 }
+
+namespace {
+  static struct Register {
+    Register() {
+      AlphaTargetMachine::registerAsmPrinter(createAlphaCodePrinterPass);
+    }
+  } Registrator;
+}