From a194c3a69e5430acd95635f37610f9fdf75b5db3 Mon Sep 17 00:00:00 2001
From: Bruno Cardoso Lopes <bruno.cardoso@gmail.com>
Date: Sat, 30 May 2009 20:51:52 +0000
Subject: First patch in the direction of splitting MachineCodeEmitter in two
 subclasses: JITCodeEmitter and ObjectCodeEmitter. No functional changes yet.
 Patch by Aaron Gray

llvm-svn: 72631
---
 llvm/lib/Target/Alpha/AlphaCodeEmitter.cpp | 72 +++++++++++++++++++-----------
 1 file changed, 47 insertions(+), 25 deletions(-)

(limited to 'llvm/lib/Target/Alpha/AlphaCodeEmitter.cpp')

diff --git a/llvm/lib/Target/Alpha/AlphaCodeEmitter.cpp b/llvm/lib/Target/Alpha/AlphaCodeEmitter.cpp
index 0d441146b83..ab3682bc9c2 100644
--- a/llvm/lib/Target/Alpha/AlphaCodeEmitter.cpp
+++ b/llvm/lib/Target/Alpha/AlphaCodeEmitter.cpp
@@ -18,31 +18,50 @@
 #include "Alpha.h"
 #include "llvm/PassManager.h"
 #include "llvm/CodeGen/MachineCodeEmitter.h"
+#include "llvm/CodeGen/JITCodeEmitter.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/Function.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
 using namespace llvm;
 
 namespace {
-  class AlphaCodeEmitter : public MachineFunctionPass {
-    const AlphaInstrInfo  *II;
-    TargetMachine &TM;
-    MachineCodeEmitter  &MCE;
+  	
+  class AlphaCodeEmitter {
+    MachineCodeEmitter &MCE;
+  public:
+    AlphaCodeEmitter( MachineCodeEmitter &mce) : MCE(mce) {}
+
+    /// getBinaryCodeForInstr - This function, generated by the
+    /// CodeEmitterGenerator using TableGen, produces the binary encoding for
+    /// machine instructions.
+
+    unsigned getBinaryCodeForInstr(const MachineInstr &MI);
 
     /// getMachineOpValue - evaluates the MachineOperand of a given MachineInstr
-    ///
-    unsigned getMachineOpValue(const MachineInstr &MI,
-                               const MachineOperand &MO);
+
+    unsigned getMachineOpValue(const MachineInstr &MI, const MachineOperand &MO);
+  };
+
+  template <class machineCodeEmitter>
+  class VISIBILITY_HIDDEN Emitter : public MachineFunctionPass,
+      public AlphaCodeEmitter
+  {
+    const AlphaInstrInfo  *II;
+    TargetMachine &TM;
+    machineCodeEmitter  &MCE;
 
   public:
     static char ID;
-    explicit AlphaCodeEmitter(TargetMachine &tm, MachineCodeEmitter &mce)
-      : MachineFunctionPass(&ID), II(0), TM(tm), MCE(mce) {}
-    AlphaCodeEmitter(TargetMachine &tm, MachineCodeEmitter &mce,
+    explicit Emitter(TargetMachine &tm, machineCodeEmitter &mce)
+      : MachineFunctionPass(&ID), AlphaCodeEmitter( mce),
+        II(0), TM(tm), MCE(mce) {}
+    Emitter(TargetMachine &tm, machineCodeEmitter &mce,
                      const AlphaInstrInfo& ii)
-      : MachineFunctionPass(&ID), II(&ii), TM(tm), MCE(mce) {}
+      : MachineFunctionPass(&ID), AlphaCodeEmitter( mce),
+        II(&ii), TM(tm), MCE(mce) {}
 
     bool runOnMachineFunction(MachineFunction &MF);
 
@@ -52,27 +71,29 @@ namespace {
 
     void emitInstruction(const MachineInstr &MI);
 
-    /// getBinaryCodeForInstr - This function, generated by the
-    /// CodeEmitterGenerator using TableGen, produces the binary encoding for
-    /// machine instructions.
-    ///
-    unsigned getBinaryCodeForInstr(const MachineInstr &MI);
-
   private:
     void emitBasicBlock(MachineBasicBlock &MBB);
-
   };
-  char AlphaCodeEmitter::ID = 0;
+
+  template <class machineCodeEmitter>
+    char Emitter<machineCodeEmitter>::ID = 0;
 }
 
 /// createAlphaCodeEmitterPass - Return a pass that emits the collected Alpha code
 /// to the specified MCE object.
-FunctionPass *llvm::createAlphaCodeEmitterPass(AlphaTargetMachine &TM,
+
+FunctionPass *llvm::createAlphaCodeEmitterPass( AlphaTargetMachine &TM,
                                                MachineCodeEmitter &MCE) {
-  return new AlphaCodeEmitter(TM, MCE);
+  return new Emitter<MachineCodeEmitter>(TM, MCE);
+}
+
+FunctionPass *llvm::createAlphaJITCodeEmitterPass( AlphaTargetMachine &TM,
+                                               JITCodeEmitter &JCE) {
+  return new Emitter<JITCodeEmitter>(TM, JCE);
 }
 
-bool AlphaCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
+template <class machineCodeEmitter>
+bool Emitter<machineCodeEmitter>::runOnMachineFunction(MachineFunction &MF) {
   II = ((AlphaTargetMachine&)MF.getTarget()).getInstrInfo();
 
   do {
@@ -84,7 +105,8 @@ bool AlphaCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
   return false;
 }
 
-void AlphaCodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
+template <class machineCodeEmitter>
+void Emitter<machineCodeEmitter>::emitBasicBlock(MachineBasicBlock &MBB) {
   MCE.StartMachineBasicBlock(&MBB);
   for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
        I != E; ++I) {
@@ -143,7 +165,7 @@ static unsigned getAlphaRegNumber(unsigned Reg) {
 }
 
 unsigned AlphaCodeEmitter::getMachineOpValue(const MachineInstr &MI,
-                                             const MachineOperand &MO) {
+                           		     const MachineOperand &MO) {
 
   unsigned rv = 0; // Return value; defaults to 0 for unhandled cases
                    // or things that get fixed up later by the JIT.
@@ -215,6 +237,6 @@ unsigned AlphaCodeEmitter::getMachineOpValue(const MachineInstr &MI,
   return rv;
 }
 
-
 #include "AlphaGenCodeEmitter.inc"
 
+
-- 
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