File Manager

003 File Manager

Current Path: /usr/src/contrib/llvm-project/llvm/lib/Target/WebAssembly

usr / src / contrib / llvm-project / llvm / lib / Target / WebAssembly /

📁 ..
📁 AsmParser
📁 Disassembler
📁 MCTargetDesc
📄 README.txt(8.34 KB)
📁 TargetInfo
📄 WebAssembly.h(4.05 KB)
📄 WebAssembly.td(4.85 KB)
📄 WebAssemblyAddMissingPrototypes.cpp(5.41 KB)
📄 WebAssemblyArgumentMove.cpp(3.36 KB)
📄 WebAssemblyAsmPrinter.cpp(16.09 KB)
📄 WebAssemblyAsmPrinter.h(3.12 KB)
📄 WebAssemblyCFGSort.cpp(15.94 KB)
📄 WebAssemblyCFGStackify.cpp(55.56 KB)
📄 WebAssemblyDebugFixup.cpp(5.4 KB)
📄 WebAssemblyDebugValueManager.cpp(1.77 KB)
📄 WebAssemblyDebugValueManager.h(1.13 KB)
📄 WebAssemblyExceptionInfo.cpp(6.23 KB)
📄 WebAssemblyExceptionInfo.h(6.24 KB)
📄 WebAssemblyExplicitLocals.cpp(15.04 KB)
📄 WebAssemblyFastISel.cpp(40.39 KB)
📄 WebAssemblyFixBrTableDefaults.cpp(5.81 KB)
📄 WebAssemblyFixFunctionBitcasts.cpp(12.59 KB)
📄 WebAssemblyFixIrreducibleControlFlow.cpp(18.91 KB)
📄 WebAssemblyFrameLowering.cpp(12.68 KB)
📄 WebAssemblyFrameLowering.h(2.98 KB)
📄 WebAssemblyISD.def(1.17 KB)
📄 WebAssemblyISelDAGToDAG.cpp(9.08 KB)
📄 WebAssemblyISelLowering.cpp(68.59 KB)
📄 WebAssemblyISelLowering.h(5.85 KB)
📄 WebAssemblyInstrAtomics.td(48.5 KB)
📄 WebAssemblyInstrBulkMemory.td(2.84 KB)
📄 WebAssemblyInstrCall.td(3.21 KB)
📄 WebAssemblyInstrControl.td(7.93 KB)
📄 WebAssemblyInstrConv.td(14.1 KB)
📄 WebAssemblyInstrFloat.td(6.03 KB)
📄 WebAssemblyInstrFormats.td(3.1 KB)
📄 WebAssemblyInstrInfo.cpp(8.21 KB)
📄 WebAssemblyInstrInfo.h(2.63 KB)
📄 WebAssemblyInstrInfo.td(14.37 KB)
📄 WebAssemblyInstrInteger.td(6.05 KB)
📄 WebAssemblyInstrMemory.td(18.63 KB)
📄 WebAssemblyInstrRef.td(1.15 KB)
📄 WebAssemblyInstrSIMD.td(39.08 KB)
📄 WebAssemblyLateEHPrepare.cpp(14.57 KB)
📄 WebAssemblyLowerBrUnless.cpp(6.21 KB)
📄 WebAssemblyLowerEmscriptenEHSjLj.cpp(45.45 KB)
📄 WebAssemblyLowerGlobalDtors.cpp(7.79 KB)
📄 WebAssemblyMCInstLower.cpp(13.72 KB)
📄 WebAssemblyMCInstLower.h(1.63 KB)
📄 WebAssemblyMachineFunctionInfo.cpp(4.29 KB)
📄 WebAssemblyMachineFunctionInfo.h(6.75 KB)
📄 WebAssemblyMemIntrinsicResults.cpp(7.39 KB)
📄 WebAssemblyOptimizeLiveIntervals.cpp(4.61 KB)
📄 WebAssemblyOptimizeReturned.cpp(2.46 KB)
📄 WebAssemblyPeephole.cpp(6.33 KB)
📄 WebAssemblyPrepareForLiveIntervals.cpp(4.34 KB)
📄 WebAssemblyRegColoring.cpp(6.37 KB)
📄 WebAssemblyRegNumbering.cpp(3.86 KB)
📄 WebAssemblyRegStackify.cpp(38.22 KB)
📄 WebAssemblyRegisterInfo.cpp(6.21 KB)
📄 WebAssemblyRegisterInfo.h(1.74 KB)
📄 WebAssemblyRegisterInfo.td(2.83 KB)
📄 WebAssemblyReplacePhysRegs.cpp(3.89 KB)
📄 WebAssemblyRuntimeLibcallSignatures.cpp(33.82 KB)
📄 WebAssemblyRuntimeLibcallSignatures.h(1.37 KB)
📄 WebAssemblySelectionDAGInfo.cpp(2.57 KB)
📄 WebAssemblySelectionDAGInfo.h(1.94 KB)
📄 WebAssemblySetP2AlignOperands.cpp(3.32 KB)
📄 WebAssemblySubtarget.cpp(2.18 KB)
📄 WebAssemblySubtarget.h(3.88 KB)
📄 WebAssemblyTargetMachine.cpp(18.85 KB)
📄 WebAssemblyTargetMachine.h(2.29 KB)
📄 WebAssemblyTargetObjectFile.cpp(886 B)
📄 WebAssemblyTargetObjectFile.h(959 B)
📄 WebAssemblyTargetTransformInfo.cpp(2.9 KB)
📄 WebAssemblyTargetTransformInfo.h(2.5 KB)
📄 WebAssemblyUtilities.cpp(3.43 KB)
📄 WebAssemblyUtilities.h(1.8 KB)
📄 known_gcc_test_failures.txt(2.07 KB)

Editing: WebAssemblyRegisterInfo.cpp

//===-- WebAssemblyRegisterInfo.cpp - WebAssembly Register Information ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains the WebAssembly implementation of the
/// TargetRegisterInfo class.
///
//===----------------------------------------------------------------------===//

#include "WebAssemblyRegisterInfo.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssemblyFrameLowering.h"
#include "WebAssemblyInstrInfo.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetFrameLowering.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;

#define DEBUG_TYPE "wasm-reg-info"

#define GET_REGINFO_TARGET_DESC
#include "WebAssemblyGenRegisterInfo.inc"

WebAssemblyRegisterInfo::WebAssemblyRegisterInfo(const Triple &TT)
    : WebAssemblyGenRegisterInfo(0), TT(TT) {}

const MCPhysReg *
WebAssemblyRegisterInfo::getCalleeSavedRegs(const MachineFunction *) const {
  static const MCPhysReg CalleeSavedRegs[] = {0};
  return CalleeSavedRegs;
}

BitVector
WebAssemblyRegisterInfo::getReservedRegs(const MachineFunction & /*MF*/) const {
  BitVector Reserved(getNumRegs());
  for (auto Reg : {WebAssembly::SP32, WebAssembly::SP64, WebAssembly::FP32,
                   WebAssembly::FP64})
    Reserved.set(Reg);
  return Reserved;
}

void WebAssemblyRegisterInfo::eliminateFrameIndex(
    MachineBasicBlock::iterator II, int SPAdj, unsigned FIOperandNum,
    RegScavenger * /*RS*/) const {
  assert(SPAdj == 0);
  MachineInstr &MI = *II;

MachineBasicBlock &MBB = *MI.getParent();
  MachineFunction &MF = *MBB.getParent();
  MachineRegisterInfo &MRI = MF.getRegInfo();
  int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
  const MachineFrameInfo &MFI = MF.getFrameInfo();
  int64_t FrameOffset = MFI.getStackSize() + MFI.getObjectOffset(FrameIndex);

assert(MFI.getObjectSize(FrameIndex) != 0 &&
         "We assume that variable-sized objects have already been lowered, "
         "and don't use FrameIndex operands.");
  Register FrameRegister = getFrameRegister(MF);

// If this is the address operand of a load or store, make it relative to SP
  // and fold the frame offset directly in.
  unsigned AddrOperandNum = WebAssembly::getNamedOperandIdx(
      MI.getOpcode(), WebAssembly::OpName::addr);
  if (AddrOperandNum == FIOperandNum) {
    unsigned OffsetOperandNum = WebAssembly::getNamedOperandIdx(
        MI.getOpcode(), WebAssembly::OpName::off);
    assert(FrameOffset >= 0 && MI.getOperand(OffsetOperandNum).getImm() >= 0);
    int64_t Offset = MI.getOperand(OffsetOperandNum).getImm() + FrameOffset;

if (static_cast<uint64_t>(Offset) <= std::numeric_limits<uint32_t>::max()) {
      MI.getOperand(OffsetOperandNum).setImm(Offset);
      MI.getOperand(FIOperandNum)
          .ChangeToRegister(FrameRegister, /*isDef=*/false);
      return;
    }
  }

// If this is an address being added to a constant, fold the frame offset
  // into the constant.
  if (MI.getOpcode() == WebAssemblyFrameLowering::getOpcAdd(MF)) {
    MachineOperand &OtherMO = MI.getOperand(3 - FIOperandNum);
    if (OtherMO.isReg()) {
      Register OtherMOReg = OtherMO.getReg();
      if (Register::isVirtualRegister(OtherMOReg)) {
        MachineInstr *Def = MF.getRegInfo().getUniqueVRegDef(OtherMOReg);
        // TODO: For now we just opportunistically do this in the case where
        // the CONST_I32/64 happens to have exactly one def and one use. We
        // should generalize this to optimize in more cases.
        if (Def && Def->getOpcode() ==
              WebAssemblyFrameLowering::getOpcConst(MF) &&
            MRI.hasOneNonDBGUse(Def->getOperand(0).getReg())) {
          MachineOperand &ImmMO = Def->getOperand(1);
          if (ImmMO.isImm()) {
            ImmMO.setImm(ImmMO.getImm() + uint32_t(FrameOffset));
            MI.getOperand(FIOperandNum)
                .ChangeToRegister(FrameRegister, /*isDef=*/false);
            return;
          }
        }
      }
    }
  }

// Otherwise create an i32/64.add SP, offset and make it the operand.
  const auto *TII = MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();

unsigned FIRegOperand = FrameRegister;
  if (FrameOffset) {
    // Create i32/64.add SP, offset and make it the operand.
    const TargetRegisterClass *PtrRC =
        MRI.getTargetRegisterInfo()->getPointerRegClass(MF);
    Register OffsetOp = MRI.createVirtualRegister(PtrRC);
    BuildMI(MBB, *II, II->getDebugLoc(),
            TII->get(WebAssemblyFrameLowering::getOpcConst(MF)),
            OffsetOp)
        .addImm(FrameOffset);
    FIRegOperand = MRI.createVirtualRegister(PtrRC);
    BuildMI(MBB, *II, II->getDebugLoc(),
            TII->get(WebAssemblyFrameLowering::getOpcAdd(MF)),
            FIRegOperand)
        .addReg(FrameRegister)
        .addReg(OffsetOp);
  }
  MI.getOperand(FIOperandNum).ChangeToRegister(FIRegOperand, /*isDef=*/false);
}

Register
WebAssemblyRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
  // If the PReg has been replaced by a VReg, return that.
  const auto &MFI = MF.getInfo<WebAssemblyFunctionInfo>();
  if (MFI->isFrameBaseVirtual())
    return MFI->getFrameBaseVreg();
  static const unsigned Regs[2][2] = {
      /*            !isArch64Bit       isArch64Bit      */
      /* !hasFP */ {WebAssembly::SP32, WebAssembly::SP64},
      /*  hasFP */ {WebAssembly::FP32, WebAssembly::FP64}};
  const WebAssemblyFrameLowering *TFI = getFrameLowering(MF);
  return Regs[TFI->hasFP(MF)][TT.isArch64Bit()];
}

const TargetRegisterClass *
WebAssemblyRegisterInfo::getPointerRegClass(const MachineFunction &MF,
                                            unsigned Kind) const {
  assert(Kind == 0 && "Only one kind of pointer on WebAssembly");
  if (MF.getSubtarget<WebAssemblySubtarget>().hasAddr64())
    return &WebAssembly::I64RegClass;
  return &WebAssembly::I32RegClass;
}

003 File Manager

Editing: WebAssemblyRegisterInfo.cpp

Upload File

Create Folder