X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineFunctionPass.h;h=685e86824c31f66806882592dfaea46c3aea302f;hb=8613b18a5aa80b13bb8c7f470528146f009bed74;hp=6b5e64abc46c92a7d4a876bb9b62b5175af5129c;hpb=c5b19b21d84814d19692a6bbea11fbd135f4b094;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/MachineFunctionPass.h b/include/llvm/CodeGen/MachineFunctionPass.h
index 6b5e64abc46..685e86824c3 100644
--- a/include/llvm/CodeGen/MachineFunctionPass.h
+++ b/include/llvm/CodeGen/MachineFunctionPass.h
@@ -20,24 +20,39 @@
 #define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
 
 #include "llvm/Pass.h"
-#include "llvm/CodeGen/MachineFunction.h"
 
 namespace llvm {
 
-  // FIXME: This pass should declare that the pass does not invalidate any LLVM
-  // passes.
-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:
-  bool runOnFunction(Function &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:
+  /// 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