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237ef567f6
* Separate the policy decisions into a derived class [InlineSimple]
* Move the inlining mechanics into a base class [Inliner]
* Change the inliner to be an SCCPass, making it more structured and
eventually pipelinable with other SCC passes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8257 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
//===- InlineCommon.h - Code common to all inliners -------------*- C++ -*-===//
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//
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// This file defines a simple policy-based bottom-up inliner. This file
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// implements all of the boring mechanics of the bottom-up inlining, while the
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// subclass determines WHAT to inline, which is the much more interesting
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// component.
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//
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//===----------------------------------------------------------------------===//
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#ifndef INLINER_H
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#define INLINER_H
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#define DEBUG_TYPE "inline"
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#include "llvm/CallGraphSCCPass.h"
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#include <set>
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class CallSite;
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/// Inliner - This class contains all of the helper code which is used to
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/// perform the inlining operations that does not depend on the policy.
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///
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struct Inliner : public CallGraphSCCPass {
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Inliner();
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// Main run interface method, this implements the interface required by the
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// Pass class.
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virtual bool runOnSCC(const std::vector<CallGraphNode *> &SCC);
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/// This method returns the value specified by the -inline-threshold value,
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/// specified on the command line. This is typically not directly needed.
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///
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unsigned getInlineThreshold() const { return InlineThreshold; }
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/// getInlineCost - This method must be implemented by the subclass to
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/// determine the cost of inlining the specified call site. If the cost
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/// returned is greater than the current inline threshold, the call site is
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/// not inlined.
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///
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virtual int getInlineCost(CallSite CS) = 0;
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/// getRecursiveInlineCost - This method can be implemented by subclasses if
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/// it wants to treat calls to functions within the current SCC specially. If
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/// this method is not overloaded, it just chains to getInlineCost().
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///
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virtual int getRecursiveInlineCost(CallSite CS);
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private:
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unsigned InlineThreshold;
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bool performInlining(CallSite CS, std::set<Function*> &SCC);
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};
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#endif
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