mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 16:33:37 +01:00
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
//========-------- BlockFrequencyInfo.h - Block 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_ANALYSIS_BLOCKFREQUENCYINFO_H
|
|
#define LLVM_ANALYSIS_BLOCKFREQUENCYINFO_H
|
|
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Support/BlockFrequency.h"
|
|
#include <climits>
|
|
|
|
namespace llvm {
|
|
|
|
class BranchProbabilityInfo;
|
|
template<class BlockT, class FunctionT, class BranchProbInfoT>
|
|
class BlockFrequencyImpl;
|
|
|
|
/// BlockFrequencyInfo pass uses BlockFrequencyImpl implementation to estimate
|
|
/// IR basic block frequencies.
|
|
class BlockFrequencyInfo : public FunctionPass {
|
|
|
|
BlockFrequencyImpl<BasicBlock, Function, BranchProbabilityInfo> *BFI;
|
|
|
|
public:
|
|
static char ID;
|
|
|
|
BlockFrequencyInfo();
|
|
|
|
~BlockFrequencyInfo();
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const;
|
|
|
|
bool runOnFunction(Function &F);
|
|
|
|
/// getblockFreq - Return block frequency. Return 0 if we don't have the
|
|
/// information. 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 floating points.
|
|
///
|
|
BlockFrequency getBlockFreq(BasicBlock *BB) const;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|