llvm-mirror/lib/Target/AArch64/AArch64MachineLegalizer.cpp

//===- AArch64MachineLegalizer.cpp -------------------------------*- C++ -*-==//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements the targeting of the Machinelegalizer class for
/// AArch64.
/// \todo This should be generated by TableGen.
//===----------------------------------------------------------------------===//

#include "AArch64MachineLegalizer.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/Target/TargetOpcodes.h"

using namespace llvm;

#ifndef LLVM_BUILD_GLOBAL_ISEL
#error "You shouldn't build this"
#endif

AArch64MachineLegalizer::AArch64MachineLegalizer() {
  using namespace TargetOpcode;
  const LLT s1 = LLT::scalar(1);
  const LLT s8 = LLT::scalar(8);
  const LLT s16 = LLT::scalar(16);
  const LLT s32 = LLT::scalar(32);
  const LLT s64 = LLT::scalar(64);
  const LLT v2s32 = LLT::vector(2, 32);
  const LLT v4s32 = LLT::vector(4, 32);
  const LLT v2s64 = LLT::vector(2, 64);

  for (auto BinOp : {G_ADD, G_SUB, G_MUL, G_AND, G_OR, G_XOR}) {
    for (auto Ty : {s32, s64, v2s32, v4s32, v2s64})
      setAction(BinOp, Ty, Legal);

    for (auto Ty : {s8, s16})
      setAction(BinOp, Ty, WidenScalar);
  }

  for (auto BinOp : {G_SHL, G_LSHR, G_ASHR, G_SDIV, G_UDIV})
    for (auto Ty : {s32, s64})
      setAction(BinOp, Ty, Legal);

  for (auto BinOp : {G_FADD, G_FSUB, G_FMUL, G_FDIV})
    for (auto Ty : {s32, s64})
      setAction(BinOp, Ty, Legal);

  for (auto MemOp : {G_LOAD, G_STORE}) {
    for (auto Ty : {s8, s16, s32, s64})
      setAction(MemOp, Ty, Legal);

    setAction(MemOp, s1, WidenScalar);
  }

  for (auto Ty : {s32, s64}) {
    setAction(TargetOpcode::G_CONSTANT, Ty, Legal);
    setAction(TargetOpcode::G_FCONSTANT, Ty, Legal);
  }

  for (auto Ty : {s1, s8, s16})
    setAction(TargetOpcode::G_CONSTANT, Ty, WidenScalar);

  setAction(TargetOpcode::G_FCONSTANT, s16, WidenScalar);

  setAction(G_BR, LLT::unsized(), Legal);

  setAction(G_FRAME_INDEX, LLT::pointer(0), Legal);

  computeTables();
}