mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-16 11:30:51 +00:00
59a9dab4d8
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135352 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
//====----- MachineBlockFrequency.h - MachineBlock Frequency Analysis ----====//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Loops should be simplified before this analysis.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_MACHINEBLOCKFREQUENCY_H
|
|
#define LLVM_CODEGEN_MACHINEBLOCKFREQUENCY_H
|
|
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include <climits>
|
|
|
|
namespace llvm {
|
|
|
|
class MachineBranchProbabilityInfo;
|
|
template<class BlockT, class FunctionT, class BranchProbInfoT>
|
|
class BlockFrequencyImpl;
|
|
|
|
/// MachineBlockFrequency pass uses BlockFrequencyImpl implementation to estimate
|
|
/// machine basic block frequencies.
|
|
class MachineBlockFrequency : public MachineFunctionPass {
|
|
|
|
BlockFrequencyImpl<MachineBasicBlock, MachineFunction, MachineBranchProbabilityInfo> *MBFI;
|
|
|
|
public:
|
|
static char ID;
|
|
|
|
MachineBlockFrequency();
|
|
|
|
~MachineBlockFrequency();
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const;
|
|
|
|
bool runOnMachineFunction(MachineFunction &F);
|
|
|
|
/// getblockFreq - Return block frequency. Never return 0, value must be
|
|
/// positive. Please note that initial frequency is equal to 1024. It means
|
|
/// that we should not rely on the value itself, but only on the comparison to
|
|
/// the other block frequencies. We do this to avoid using of the floating
|
|
/// points.
|
|
uint32_t getBlockFreq(MachineBasicBlock *MBB);
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|