blob: 3a72d026d9fdda9ad033db692faefd49b5df4dec (
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
54
|
//===-- Latency.h -----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// A BenchmarkRunner implementation to measure instruction latencies.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
#define LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
#include "BenchmarkRunner.h"
#include "MCInstrDescView.h"
#include "SnippetGenerator.h"
namespace exegesis {
class LatencySnippetGenerator : public SnippetGenerator {
public:
LatencySnippetGenerator(const LLVMState &State) : SnippetGenerator(State) {}
~LatencySnippetGenerator() override;
llvm::Expected<CodeTemplate>
generateCodeTemplate(unsigned Opcode) const override;
private:
llvm::Error isInfeasible(const llvm::MCInstrDesc &MCInstrDesc) const;
llvm::Expected<CodeTemplate>
generateTwoInstructionPrototype(const Instruction &Instr) const;
};
class LatencyBenchmarkRunner : public BenchmarkRunner {
public:
LatencyBenchmarkRunner(const LLVMState &State)
: BenchmarkRunner(State, InstructionBenchmark::Latency) {}
~LatencyBenchmarkRunner() override;
private:
std::vector<BenchmarkMeasure>
runMeasurements(const ExecutableFunction &EF,
ScratchSpace &Scratch) const override;
virtual const char *getCounterName() const;
};
} // namespace exegesis
#endif // LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
|
