X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineFunctionPass.h;h=685e86824c31f66806882592dfaea46c3aea302f;hb=8613b18a5aa80b13bb8c7f470528146f009bed74;hp=f90c696738f6083d0976bab9ef64eb8bc541d9b7;hpb=d27df628cc6fa29605fa221a2f0b03b4592caf03;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/MachineFunctionPass.h b/include/llvm/CodeGen/MachineFunctionPass.h
index f90c696738f..685e86824c3 100644
--- a/include/llvm/CodeGen/MachineFunctionPass.h
+++ b/include/llvm/CodeGen/MachineFunctionPass.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -20,29 +20,39 @@
 #define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
 
 #include "llvm/Pass.h"
-#include "llvm/CodeGen/MachineFunction.h"
 
 namespace llvm {
 
-struct MachineFunctionPass : public FunctionPass {
+class MachineFunction;
 
+/// MachineFunctionPass - This class adapts the FunctionPass interface to
+/// allow convenient creation of passes that operate on the MachineFunction
+/// representation. Instead of overriding runOnFunction, subclasses
+/// override runOnMachineFunction.
+class MachineFunctionPass : public FunctionPass {
+protected:
   explicit MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {}
+  explicit MachineFunctionPass(void *ID) : FunctionPass(ID) {}
 
-protected:
   /// runOnMachineFunction - This method must be overloaded to perform the
   /// desired machine code transformation or analysis.
   ///
   virtual bool runOnMachineFunction(MachineFunction &MF) = 0;
 
-public:
-  // FIXME: This pass should declare that the pass does not invalidate any LLVM
-  // passes.
-  bool runOnFunction(Function &F) {
-    return runOnMachineFunction(MachineFunction::get(&F));
-  }
-  
+  /// getAnalysisUsage - Subclasses that override getAnalysisUsage
+  /// must call this.
+  ///
+  /// For MachineFunctionPasses, calling AU.preservesCFG() indicates that
+  /// the pass does not modify the MachineBasicBlock CFG.
+  ///
+  virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+
 private:
-  virtual void virtfn();  // out of line virtual fn to give class a home.
+  /// createPrinterPass - Get a machine function printer pass.
+  virtual Pass *createPrinterPass(raw_ostream &O,
+                                  const std::string &Banner) const;
+
+  virtual bool runOnFunction(Function &F);
 };
 
 } // End llvm namespace