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081c34b725
must be called in the pass's constructor. This function uses static dependency declarations to recursively initialize the pass's dependencies. Clients that only create passes through the createFooPass() APIs will require no changes. Clients that want to use the CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h before parsing commandline arguments. I have tested this with all standard configurations of clang and llvm-gcc on Darwin. It is possible that there are problems with the static dependencies that will only be visible with non-standard options. If you encounter any crash in pass registration/creation, please send the testcase to me directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//===---------------- lib/CodeGen/CalcSpillWeights.h ------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_CALCSPILLWEIGHTS_H
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#define LLVM_CODEGEN_CALCSPILLWEIGHTS_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/ADT/DenseMap.h"
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namespace llvm {
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class LiveInterval;
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class LiveIntervals;
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class MachineLoopInfo;
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/// VirtRegAuxInfo - Calculate auxiliary information for a virtual
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/// register such as its spill weight and allocation hint.
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class VirtRegAuxInfo {
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MachineFunction &mf_;
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LiveIntervals &lis_;
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const MachineLoopInfo &loops_;
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DenseMap<unsigned, float> hint_;
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public:
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VirtRegAuxInfo(MachineFunction &mf, LiveIntervals &lis,
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const MachineLoopInfo &loops) :
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mf_(mf), lis_(lis), loops_(loops) {}
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/// CalculateRegClass - recompute the register class for reg from its uses.
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/// Since the register class can affect the allocation hint, this function
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/// should be called before CalculateWeightAndHint if both are called.
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void CalculateRegClass(unsigned reg);
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/// CalculateWeightAndHint - (re)compute li's spill weight and allocation
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/// hint.
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void CalculateWeightAndHint(LiveInterval &li);
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};
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/// CalculateSpillWeights - Compute spill weights for all virtual register
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/// live intervals.
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class CalculateSpillWeights : public MachineFunctionPass {
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public:
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static char ID;
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CalculateSpillWeights() : MachineFunctionPass(ID) {
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initializeCalculateSpillWeightsPass(*PassRegistry::getPassRegistry());
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}
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virtual void getAnalysisUsage(AnalysisUsage &au) const;
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virtual bool runOnMachineFunction(MachineFunction &fn);
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private:
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/// Returns true if the given live interval is zero length.
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bool isZeroLengthInterval(LiveInterval *li) const;
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};
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}
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#endif // LLVM_CODEGEN_CALCSPILLWEIGHTS_H
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