1 //===-- SnippetRepetitor.h --------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// Defines helpers to fill functions with repetitions of a snippet. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_TOOLS_LLVM_EXEGESIS_FUNCTIONFILLER_H 15 #define LLVM_TOOLS_LLVM_EXEGESIS_FUNCTIONFILLER_H 16 17 #include "Assembler.h" 18 #include "BenchmarkResult.h" 19 #include "LlvmState.h" 20 #include "llvm/ADT/BitVector.h" 21 #include "llvm/CodeGen/MachineFunction.h" 22 #include "llvm/MC/MCInst.h" 23 #include "llvm/MC/MCInstrInfo.h" 24 #include "llvm/Object/Binary.h" 25 26 namespace llvm { 27 namespace exegesis { 28 29 class SnippetRepetitor { 30 public: 31 static std::unique_ptr<const SnippetRepetitor> 32 Create(InstructionBenchmark::RepetitionModeE Mode, const LLVMState &State); 33 34 virtual ~SnippetRepetitor(); 35 36 // Returns the set of registers that are reserved by the repetitor. 37 virtual BitVector getReservedRegs() const = 0; 38 39 // Returns a functor that repeats `Instructions` so that the function executes 40 // at least `MinInstructions` instructions. 41 virtual FillFunction Repeat(ArrayRef<MCInst> Instructions, 42 unsigned MinInstructions) const = 0; 43 SnippetRepetitor(const LLVMState & State)44 explicit SnippetRepetitor(const LLVMState &State) : State(State) {} 45 46 protected: 47 const LLVMState &State; 48 }; 49 50 } // namespace exegesis 51 } // namespace llvm 52 53 #endif 54