blob: 25bf1f08dc6406d36d68b324790e81117810599f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
//====----- 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
|
