X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineCodeEmitter.h;h=018c5e5a3a6b701bf2d3e29aad3a7d4d5cc4afff;hb=80a75bfae980df96f969f1c05b0c4a80ce975240;hp=d26d7e773f454d65c9affc20c856ccc33bd66cf6;hpb=1f4549f35c69376a07360bd57ff06ed8f636d153;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/MachineCodeEmitter.h b/include/llvm/CodeGen/MachineCodeEmitter.h
index d26d7e773f4..018c5e5a3a6 100644
--- a/include/llvm/CodeGen/MachineCodeEmitter.h
+++ b/include/llvm/CodeGen/MachineCodeEmitter.h
@@ -18,7 +18,7 @@
 #define LLVM_CODEGEN_MACHINECODEEMITTER_H
 
 #include "llvm/Support/DataTypes.h"
-#include <map>
+#include <vector>
 
 namespace llvm {
 
@@ -65,31 +65,14 @@ public:
   /// about to be code generated.  This initializes the BufferBegin/End/Ptr
   /// fields.
   ///
-  virtual void startFunction(MachineFunction &F) {}
+  virtual void startFunction(MachineFunction &F) = 0;
 
   /// finishFunction - This callback is invoked when the specified function has
   /// finished code generation.  If a buffer overflow has occurred, this method
   /// returns true (the callee is required to try again), otherwise it returns
   /// false.
   ///
-  virtual bool finishFunction(MachineFunction &F) {
-    return CurBufferPtr == BufferEnd;
-  }
-
-  /// emitConstantPool - This callback is invoked to output the constant pool
-  /// for the function.
-  virtual void emitConstantPool(MachineConstantPool *MCP) {}
-
-  /// initJumpTableInfo - This callback is invoked by the JIT to allocate the
-  /// necessary memory to hold the jump tables.
-  virtual void initJumpTableInfo(MachineJumpTableInfo *MJTI) {}
-  
-  /// emitJumpTableInfo - This callback is invoked to output the jump tables
-  /// for the function.  In addition to a pointer to the MachineJumpTableInfo,
-  /// this function also takes a map of MBBs to addresses, so that the final
-  /// addresses of the MBBs can be written to the jump tables.
-  virtual void emitJumpTableInfo(MachineJumpTableInfo *MJTI,
-                                 std::map<MachineBasicBlock*,uint64_t> &MBBM) {}
+  virtual bool finishFunction(MachineFunction &F) = 0;
   
   /// startFunctionStub - This callback is invoked when the JIT needs the
   /// address of a function that has not been code generated yet.  The StubSize
@@ -97,12 +80,12 @@ public:
   /// have constant pools, the can only use the other emitByte*/emitWord*
   /// methods.
   ///
-  virtual void startFunctionStub(unsigned StubSize) {}
+  virtual void startFunctionStub(unsigned StubSize, unsigned Alignment = 1) = 0;
 
   /// finishFunctionStub - This callback is invoked to terminate a function
   /// stub.
   ///
-  virtual void *finishFunctionStub(const Function *F) { return 0; }
+  virtual void *finishFunctionStub(const Function *F) = 0;
 
   /// emitByte - This callback is invoked when a byte needs to be written to the
   /// output stream.
@@ -140,14 +123,23 @@ public:
     }
   }
 
+  /// emitAlignment - Move the CurBufferPtr pointer up the the specified
+  /// alignment (saturated to BufferEnd of course).
+  void emitAlignment(unsigned Alignment) {
+    if (Alignment == 0) Alignment = 1;
+    // Move the current buffer ptr up to the specified alignment.
+    CurBufferPtr =
+      (unsigned char*)(((intptr_t)CurBufferPtr+Alignment-1) &
+                       ~(intptr_t)(Alignment-1));
+    if (CurBufferPtr > BufferEnd)
+      CurBufferPtr = BufferEnd;
+  }
+  
   /// allocateSpace - Allocate a block of space in the current output buffer,
   /// returning null (and setting conditions to indicate buffer overflow) on
   /// failure.  Alignment is the alignment in bytes of the buffer desired.
   void *allocateSpace(intptr_t Size, unsigned Alignment) {
-    if (Alignment == 0) Alignment = 1;
-    // Move the current buffer ptr up to the specified alignment.
-    CurBufferPtr =
-      (unsigned char*)(((intptr_t)CurBufferPtr+Alignment-1) & ~(Alignment-1));
+    emitAlignment(Alignment);
     void *Result = CurBufferPtr;
     
     // Allocate the space.
@@ -160,7 +152,11 @@ public:
     }
     return Result;
   }
-  
+
+  /// StartMachineBasicBlock - This should be called by the target when a new
+  /// basic block is about to be emitted.  This way the MCE knows where the
+  /// start of the block is, and can implement getMachineBasicBlockAddress.
+  virtual void StartMachineBasicBlock(MachineBasicBlock *MBB) = 0;
   
   /// getCurrentPCValue - This returns the address that the next emitted byte
   /// will be output to.
@@ -179,15 +175,24 @@ public:
   /// noted with this interface.
   virtual void addRelocation(const MachineRelocation &MR) = 0;
 
+  
+  /// FIXME: These should all be handled with relocations!
+  
   /// getConstantPoolEntryAddress - Return the address of the 'Index' entry in
   /// the constant pool that was last emitted with the emitConstantPool method.
   ///
-  virtual uint64_t getConstantPoolEntryAddress(unsigned Index) = 0;
+  virtual intptr_t getConstantPoolEntryAddress(unsigned Index) const = 0;
 
   /// getJumpTableEntryAddress - Return the address of the jump table with index
   /// 'Index' in the function that last called initJumpTableInfo.
   ///
-  virtual uint64_t getJumpTableEntryAddress(unsigned Index) = 0;
+  virtual intptr_t getJumpTableEntryAddress(unsigned Index) const = 0;
+  
+  /// getMachineBasicBlockAddress - Return the address of the specified
+  /// MachineBasicBlock, only usable after the label for the MBB has been
+  /// emitted.
+  ///
+  virtual intptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const= 0;
 };
 
 } // End llvm namespace