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40 lines
1.0 KiB
C++
40 lines
1.0 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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namespace llvm {
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class LiveInterval;
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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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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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