LLVM API Documentation
00001 //===- InlineCommon.h - Code common to all inliners -------------*- C++ -*-===// 00002 // 00003 // The LLVM Compiler Infrastructure 00004 // 00005 // This file was developed by the LLVM research group and is distributed under 00006 // the University of Illinois Open Source License. See LICENSE.TXT for details. 00007 // 00008 //===----------------------------------------------------------------------===// 00009 // 00010 // This file defines a simple policy-based bottom-up inliner. This file 00011 // implements all of the boring mechanics of the bottom-up inlining, while the 00012 // subclass determines WHAT to inline, which is the much more interesting 00013 // component. 00014 // 00015 //===----------------------------------------------------------------------===// 00016 00017 #ifndef INLINER_H 00018 #define INLINER_H 00019 00020 #define DEBUG_TYPE "inline" 00021 #include "llvm/CallGraphSCCPass.h" 00022 00023 namespace llvm { 00024 class CallSite; 00025 00026 /// Inliner - This class contains all of the helper code which is used to 00027 /// perform the inlining operations that does not depend on the policy. 00028 /// 00029 struct Inliner : public CallGraphSCCPass { 00030 Inliner(); 00031 00032 // Main run interface method, this implements the interface required by the 00033 // Pass class. 00034 virtual bool runOnSCC(const std::vector<CallGraphNode *> &SCC); 00035 00036 // doFinalization - Remove now-dead linkonce functions at the end of 00037 // processing to avoid breaking the SCC traversal. 00038 virtual bool doFinalization(CallGraph &CG); 00039 00040 00041 /// This method returns the value specified by the -inline-threshold value, 00042 /// specified on the command line. This is typically not directly needed. 00043 /// 00044 unsigned getInlineThreshold() const { return InlineThreshold; } 00045 00046 /// getInlineCost - This method must be implemented by the subclass to 00047 /// determine the cost of inlining the specified call site. If the cost 00048 /// returned is greater than the current inline threshold, the call site is 00049 /// not inlined. 00050 /// 00051 virtual int getInlineCost(CallSite CS) = 0; 00052 00053 private: 00054 // InlineThreshold - Cache the value here for easy access. 00055 unsigned InlineThreshold; 00056 }; 00057 00058 } // End llvm namespace 00059 00060 #endif