X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineFunctionPass.h;h=b7bf0a36c44737064a98e20a45d2afee45cc870b;hb=53e98a2c4aa7065f4136c5263b14192036c1e056;hp=95bb2bf510d52c0cfae8e8c9418b8dea285d1be7;hpb=ae73dc1448d25b02cabc7c64c86c64371453dda8;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/MachineFunctionPass.h b/include/llvm/CodeGen/MachineFunctionPass.h
index 95bb2bf510d..b7bf0a36c44 100644
--- a/include/llvm/CodeGen/MachineFunctionPass.h
+++ b/include/llvm/CodeGen/MachineFunctionPass.h
@@ -20,30 +20,38 @@
 #define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
 
 #include "llvm/Pass.h"
-#include "llvm/CodeGen/MachineFunction.h"
 
 namespace llvm {
 
-struct MachineFunctionPass : public FunctionPass {
-
-  explicit MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {}
-  explicit MachineFunctionPass(void *ID) : FunctionPass(ID) {}
+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(char &ID) : FunctionPass(ID) {}
+
   /// 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