From 225503a5b5de954788ad1e4bc9c69211de334c05 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 19 Jun 2009 15:48:10 +0000
Subject: [PATCH] fix the sparc codegen to not depend on the sparc asmprinter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73767 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp | 12 ++++++++++--
 lib/Target/Sparc/SparcTargetMachine.cpp         | 16 +++++++---------
 lib/Target/Sparc/SparcTargetMachine.h           | 12 ++++++++++++
 3 files changed, 29 insertions(+), 11 deletions(-)

diff --git a/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp b/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp
index e23ded09bcd..6a2fdcac01d 100644
--- a/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp
+++ b/lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp
@@ -15,6 +15,7 @@
 #define DEBUG_TYPE "asm-printer"
 #include "Sparc.h"
 #include "SparcInstrInfo.h"
+#include "SparcTargetMachine.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Module.h"
@@ -24,8 +25,6 @@
 #include "llvm/CodeGen/MachineConstantPool.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/Mangler.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/Statistic.h"
@@ -88,6 +87,7 @@ FunctionPass *llvm::createSparcCodePrinterPass(raw_ostream &o,
   return new SparcAsmPrinter(o, tm, tm.getTargetAsmInfo(), OptLevel, verbose);
 }
 
+
 /// runOnMachineFunction - This uses the printInstruction()
 /// method to print assembly for each instruction.
 ///
@@ -354,6 +354,14 @@ bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
   return false;
 }
 
+namespace {
+  static struct Register {
+    Register() {
+      SparcTargetMachine::registerAsmPrinter(createSparcCodePrinterPass);
+    }
+  } Registrator;
+}
+
 // Force static initialization when called from
 // llvm/InitializeAllAsmPrinters.h
 namespace llvm {
diff --git a/lib/Target/Sparc/SparcTargetMachine.cpp b/lib/Target/Sparc/SparcTargetMachine.cpp
index ca275daec17..fd0f12429a0 100644
--- a/lib/Target/Sparc/SparcTargetMachine.cpp
+++ b/lib/Target/Sparc/SparcTargetMachine.cpp
@@ -18,17 +18,13 @@
 #include "llvm/Target/TargetMachineRegistry.h"
 using namespace llvm;
 
-/// SparcTargetMachineModule - 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 SparcTargetMachineModule;
-int SparcTargetMachineModule = 0;
-
 // Register the target.
 static RegisterTarget<SparcTargetMachine> X("sparc", "SPARC");
 
+// No assembler printer by default
+SparcTargetMachine::AsmPrinterCtorFn SparcTargetMachine::AsmPrinterCtor = 0;
+
+
 // Force static initialization when called from llvm/InitializeAllTargets.h
 namespace llvm {
   void InitializeSparcTarget() { }
@@ -94,6 +90,8 @@ bool SparcTargetMachine::addAssemblyEmitter(PassManagerBase &PM,
                                             bool Verbose,
                                             raw_ostream &Out) {
   // Output assembly language.
-  PM.add(createSparcCodePrinterPass(Out, *this, OptLevel, Verbose));
+  assert(AsmPrinterCtor && "AsmPrinter was not linked in");
+  if (AsmPrinterCtor)
+    PM.add(AsmPrinterCtor(Out, *this, OptLevel, Verbose));
   return false;
 }
diff --git a/lib/Target/Sparc/SparcTargetMachine.h b/lib/Target/Sparc/SparcTargetMachine.h
index 40b44f2fb34..8afcc73f502 100644
--- a/lib/Target/Sparc/SparcTargetMachine.h
+++ b/lib/Target/Sparc/SparcTargetMachine.h
@@ -35,6 +35,14 @@ class SparcTargetMachine : public LLVMTargetMachine {
 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:
   SparcTargetMachine(const Module &M, const std::string &FS);
 
@@ -56,6 +64,10 @@ public:
   virtual bool addAssemblyEmitter(PassManagerBase &PM,
                                   CodeGenOpt::Level OptLevel,
                                   bool Verbose, raw_ostream &Out);
+  
+  static void registerAsmPrinter(AsmPrinterCtorFn F) {
+    AsmPrinterCtor = F;
+  }
 };
 
 } // end namespace llvm
-- 
2.34.1