mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
fd9533b4a3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133767 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
//========-------- BlockFrequency.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_BLOCKFREQUENCY_H
|
|
#define LLVM_ANALYSIS_BLOCKFREQUENCY_H
|
|
|
|
#include "llvm/Pass.h"
|
|
#include <climits>
|
|
|
|
namespace llvm {
|
|
|
|
class BranchProbabilityInfo;
|
|
template<class BlockT, class FunctionT, class BranchProbInfoT>
|
|
class BlockFrequencyImpl;
|
|
|
|
/// BlockFrequency pass uses BlockFrequencyImpl implementation to estimate
|
|
/// IR basic block frequencies.
|
|
class BlockFrequency : public FunctionPass {
|
|
|
|
BlockFrequencyImpl<BasicBlock, Function, BranchProbabilityInfo> *BFI;
|
|
|
|
public:
|
|
static char ID;
|
|
|
|
BlockFrequency();
|
|
|
|
~BlockFrequency();
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const;
|
|
|
|
bool runOnFunction(Function &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(BasicBlock *BB);
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|