mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
//===- InlinerPass.h - Code common to all inliners --------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines a simple policy-based bottom-up inliner. This file
|
|
// implements all of the boring mechanics of the bottom-up inlining, while the
|
|
// subclass determines WHAT to inline, which is the much more interesting
|
|
// component.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_IPO_INLINERPASS_H
|
|
#define LLVM_TRANSFORMS_IPO_INLINERPASS_H
|
|
|
|
#include "llvm/CallGraphSCCPass.h"
|
|
|
|
namespace llvm {
|
|
class CallSite;
|
|
class TargetData;
|
|
class InlineCost;
|
|
template<class PtrType, unsigned SmallSize>
|
|
class SmallPtrSet;
|
|
|
|
/// Inliner - This class contains all of the helper code which is used to
|
|
/// perform the inlining operations that do not depend on the policy.
|
|
///
|
|
struct Inliner : public CallGraphSCCPass {
|
|
explicit Inliner(char &ID);
|
|
explicit Inliner(char &ID, int Threshold);
|
|
|
|
/// getAnalysisUsage - For this class, we declare that we require and preserve
|
|
/// the call graph. If the derived class implements this method, it should
|
|
/// always explicitly call the implementation here.
|
|
virtual void getAnalysisUsage(AnalysisUsage &Info) const;
|
|
|
|
// Main run interface method, this implements the interface required by the
|
|
// Pass class.
|
|
virtual bool runOnSCC(CallGraphSCC &SCC);
|
|
|
|
// doFinalization - Remove now-dead linkonce functions at the end of
|
|
// processing to avoid breaking the SCC traversal.
|
|
virtual bool doFinalization(CallGraph &CG);
|
|
|
|
/// This method returns the value specified by the -inline-threshold value,
|
|
/// specified on the command line. This is typically not directly needed.
|
|
///
|
|
unsigned getInlineThreshold() const { return InlineThreshold; }
|
|
|
|
/// Calculate the inline threshold for given Caller. This threshold is lower
|
|
/// if the caller is marked with OptimizeForSize and -inline-threshold is not
|
|
/// given on the comand line. It is higher if the callee is marked with the
|
|
/// inlinehint attribute.
|
|
///
|
|
unsigned getInlineThreshold(CallSite CS) const;
|
|
|
|
/// getInlineCost - This method must be implemented by the subclass to
|
|
/// determine the cost of inlining the specified call site. If the cost
|
|
/// returned is greater than the current inline threshold, the call site is
|
|
/// not inlined.
|
|
///
|
|
virtual InlineCost getInlineCost(CallSite CS) = 0;
|
|
|
|
// getInlineFudgeFactor - Return a > 1.0 factor if the inliner should use a
|
|
// higher threshold to determine if the function call should be inlined.
|
|
///
|
|
virtual float getInlineFudgeFactor(CallSite CS) = 0;
|
|
|
|
/// resetCachedCostInfo - erase any cached cost data from the derived class.
|
|
/// If the derived class has no such data this can be empty.
|
|
///
|
|
virtual void resetCachedCostInfo(Function* Caller) = 0;
|
|
|
|
/// growCachedCostInfo - update the cached cost info for Caller after Callee
|
|
/// has been inlined.
|
|
virtual void growCachedCostInfo(Function *Caller, Function *Callee) = 0;
|
|
|
|
/// removeDeadFunctions - Remove dead functions that are not included in
|
|
/// DNR (Do Not Remove) list.
|
|
bool removeDeadFunctions(CallGraph &CG,
|
|
SmallPtrSet<const Function *, 16> *DNR = NULL);
|
|
private:
|
|
// InlineThreshold - Cache the value here for easy access.
|
|
unsigned InlineThreshold;
|
|
|
|
/// shouldInline - Return true if the inliner should attempt to
|
|
/// inline at the given CallSite.
|
|
bool shouldInline(CallSite CS);
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|