From e8f1018130e24bd20d193003eddaa7e16e48d4bd Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 16 Jun 2009 22:38:04 +0000
Subject: [PATCH] fix a circular dependency between the mips code generator and
 its asmprinter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73573 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp |  8 ++++++++
 lib/Target/Mips/MipsTargetMachine.cpp         |  9 ++++++---
 lib/Target/Mips/MipsTargetMachine.h           | 15 ++++++++++++++-
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp b/lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp
index 201ee058b12..077ec96d17b 100644
--- a/lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp
+++ b/lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp
@@ -579,6 +579,14 @@ doFinalization(Module &M)
   return AsmPrinter::doFinalization(M);
 }
 
+namespace {
+  static struct Register {
+    Register() {
+      MipsTargetMachine::registerAsmPrinter(createMipsCodePrinterPass);
+    }
+  } Registrator;
+}
+
 // Force static initialization when called from
 // llvm/InitializeAllAsmPrinters.h
 namespace llvm {
diff --git a/lib/Target/Mips/MipsTargetMachine.cpp b/lib/Target/Mips/MipsTargetMachine.cpp
index 720e9a85b5d..83b9b62e8ee 100644
--- a/lib/Target/Mips/MipsTargetMachine.cpp
+++ b/lib/Target/Mips/MipsTargetMachine.cpp
@@ -31,6 +31,9 @@ int MipsTargetMachineModule = 0;
 static RegisterTarget<MipsTargetMachine>    X("mips", "Mips");
 static RegisterTarget<MipselTargetMachine>  Y("mipsel", "Mipsel");
 
+MipsTargetMachine::AsmPrinterCtorFn MipsTargetMachine::AsmPrinterCtor = 0;
+
+
 // Force static initialization when called from llvm/InitializeAllTargets.h
 namespace llvm {
   void InitializeMipsTarget() { }
@@ -130,9 +133,9 @@ addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
 // true if AssemblyEmitter is supported
 bool MipsTargetMachine::
 addAssemblyEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel, 
-                   bool Verbose, raw_ostream &Out) 
-{
+                   bool Verbose, raw_ostream &Out)  {
   // Output assembly language.
-  PM.add(createMipsCodePrinterPass(Out, *this, OptLevel, Verbose));
+  assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+  PM.add(AsmPrinterCtor(Out, *this, OptLevel, Verbose));
   return false;
 }
diff --git a/lib/Target/Mips/MipsTargetMachine.h b/lib/Target/Mips/MipsTargetMachine.h
index a9e1df27ae7..85fafadde7c 100644
--- a/lib/Target/Mips/MipsTargetMachine.h
+++ b/lib/Target/Mips/MipsTargetMachine.h
@@ -33,10 +33,23 @@ namespace llvm {
   
   protected:
     virtual const TargetAsmInfo *createTargetAsmInfo() const;
-  
+  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)(raw_ostream &o,
+                                              MipsTargetMachine &tm,
+                                              CodeGenOpt::Level OptLevel,
+                                              bool verbose);
+    static AsmPrinterCtorFn AsmPrinterCtor;
+    
   public:
     MipsTargetMachine(const Module &M, const std::string &FS, bool isLittle);
 
+    static void registerAsmPrinter(AsmPrinterCtorFn F) {
+      AsmPrinterCtor = F;
+    }
+    
     virtual const MipsInstrInfo   *getInstrInfo()     const 
     { return &InstrInfo; }
     virtual const TargetFrameInfo *getFrameInfo()     const