Use a PointerUnion in MCSymbol for Section and Fragment. NFC.

[oota-llvm.git] / include / llvm / CodeGen / MachineFunctionPass.h

diff --git a/include/llvm/CodeGen/MachineFunctionPass.h b/include/llvm/CodeGen/MachineFunctionPass.h
index 95bb2bf510d52c0cfae8e8c9418b8dea285d1be7..50a1f6e96217d923a4fa329c88b9aa1f2c9a1bc2 100644 (file)
--- a/include/llvm/CodeGen/MachineFunctionPass.h
+++ b/include/llvm/CodeGen/MachineFunctionPass.h
@@ -16,34 +16,42 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
-#define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
+#ifndef LLVM_CODEGEN_MACHINEFUNCTIONPASS_H
+#define LLVM_CODEGEN_MACHINEFUNCTIONPASS_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.
+  ///
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+
 private:
-  virtual void virtfn();  // out of line virtual fn to give class a home.
+  /// createPrinterPass - Get a machine function printer pass.
+  Pass *createPrinterPass(raw_ostream &O,
+                          const std::string &Banner) const override;
+
+  bool runOnFunction(Function &F) override;
 };
 
 } // End llvm namespace