Generates conditional branch instead of fake ones for Select instruction in some...

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

diff --git a/include/llvm/CodeGen/MachineFunctionPass.h b/include/llvm/CodeGen/MachineFunctionPass.h
index 973babd702a838a70bfef84c5213376cd4ef1422..50a1f6e96217d923a4fa329c88b9aa1f2c9a1bc2 100644 (file)
--- 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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -16,27 +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 {
+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;
 
-  // FIXME: This pass should declare that the pass does not invalidate any LLVM
-  // passes.
+  /// 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:
+  /// createPrinterPass - Get a machine function printer pass.
+  Pass *createPrinterPass(raw_ostream &O,
+                          const std::string &Banner) const override;
 
-  virtual bool runOnFunction(Function &F) {
-    return runOnMachineFunction(MachineFunction::get(&F));
-  }
+  bool runOnFunction(Function &F) override;
 };
 
 } // End llvm namespace