llvm/lib/MCA/CodeEmitter.cpp

   1 //===--------------------- CodeEmitter.cpp ----------------------*- 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 // This file implements the CodeEmitter API.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/MCA/CodeEmitter.h"
  14
  15 namespace llvm {
  16 namespace mca {
  17
  18 CodeEmitter::EncodingInfo CodeEmitter::getOrCreateEncodingInfo(unsigned MCID) {
  19   EncodingInfo &EI = Encodings[MCID];
  20   if (EI.second)
  21     return EI;
  22
  23   SmallVector<llvm::MCFixup, 2> Fixups;
  24   const MCInst &Inst = Sequence[MCID];
  25   MCInst Relaxed(Sequence[MCID]);
  26   if (MAB.mayNeedRelaxation(Inst, STI))
  27     MAB.relaxInstruction(Relaxed, STI);
  28
  29   EI.first = Code.size();
  30   MCE.encodeInstruction(Relaxed, Code, Fixups, STI);
  31   EI.second = Code.size() - EI.first;
  32   return EI;
  33 }
  34
  35 } // namespace mca
  36 } // namespace llvm