1 //===- InlineCommon.h - Code common to all inliners -------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a simple policy-based bottom-up inliner. This file
11 // implements all of the boring mechanics of the bottom-up inlining, while the
12 // subclass determines WHAT to inline, which is the much more interesting
15 //===----------------------------------------------------------------------===//
20 #define DEBUG_TYPE "inline"
21 #include "llvm/CallGraphSCCPass.h"
26 /// Inliner - This class contains all of the helper code which is used to
27 /// perform the inlining operations that does not depend on the policy.
29 struct Inliner : public CallGraphSCCPass {
32 // Main run interface method, this implements the interface required by the
34 virtual bool runOnSCC(const std::vector<CallGraphNode *> &SCC);
36 // doFinalization - Remove now-dead linkonce functions at the end of
37 // processing to avoid breaking the SCC traversal.
38 virtual bool doFinalization(CallGraph &CG);
41 /// This method returns the value specified by the -inline-threshold value,
42 /// specified on the command line. This is typically not directly needed.
44 unsigned getInlineThreshold() const { return InlineThreshold; }
46 /// getInlineCost - This method must be implemented by the subclass to
47 /// determine the cost of inlining the specified call site. If the cost
48 /// returned is greater than the current inline threshold, the call site is
51 virtual int getInlineCost(CallSite CS) = 0;
54 // InlineThreshold - Cache the value here for easy access.
55 unsigned InlineThreshold;
58 } // End llvm namespace