84 lines · cpp
1//===- R600MCInstLower.cpp - Lower R600 MachineInstr to an MCInst ---------===//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-exception6//7//===----------------------------------------------------------------------===//8//9/// \file10/// Code to lower R600 MachineInstrs to their corresponding MCInst.11//12//===----------------------------------------------------------------------===//13//14 15#include "AMDGPUMCInstLower.h"16#include "MCTargetDesc/R600MCTargetDesc.h"17#include "R600AsmPrinter.h"18#include "R600Subtarget.h"19#include "llvm/CodeGen/MachineOperand.h"20#include "llvm/MC/MCContext.h"21#include "llvm/MC/MCExpr.h"22 23using namespace llvm;24 25namespace {26class R600MCInstLower : public AMDGPUMCInstLower {27public:28 R600MCInstLower(MCContext &ctx, const R600Subtarget &ST,29 const AsmPrinter &AP);30 31 /// Lower a MachineInstr to an MCInst32 void lower(const MachineInstr *MI, MCInst &OutMI) const;33};34} // namespace35 36R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST,37 const AsmPrinter &AP)38 : AMDGPUMCInstLower(Ctx, ST, AP) {}39 40void R600MCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const {41 OutMI.setOpcode(MI->getOpcode());42 for (const MachineOperand &MO : MI->explicit_operands()) {43 MCOperand MCOp;44 lowerOperand(MO, MCOp);45 OutMI.addOperand(MCOp);46 }47}48 49void R600AsmPrinter::emitInstruction(const MachineInstr *MI) {50 R600_MC::verifyInstructionPredicates(MI->getOpcode(),51 getSubtargetInfo().getFeatureBits());52 53 const R600Subtarget &STI = MF->getSubtarget<R600Subtarget>();54 R600MCInstLower MCInstLowering(OutContext, STI, *this);55 56 StringRef Err;57 if (!STI.getInstrInfo()->verifyInstruction(*MI, Err)) {58 LLVMContext &C = MI->getMF()->getFunction().getContext();59 C.emitError("Illegal instruction detected: " + Err);60 MI->print(errs());61 }62 63 if (MI->isBundle()) {64 const MachineBasicBlock *MBB = MI->getParent();65 MachineBasicBlock::const_instr_iterator I = ++MI->getIterator();66 while (I != MBB->instr_end() && I->isInsideBundle()) {67 emitInstruction(&*I);68 ++I;69 }70 } else {71 MCInst TmpInst;72 MCInstLowering.lower(MI, TmpInst);73 EmitToStreamer(*OutStreamer, TmpInst);74 }75}76 77const MCExpr *R600AsmPrinter::lowerConstant(const Constant *CV,78 const Constant *BaseCV,79 uint64_t Offset) {80 if (const MCExpr *E = lowerAddrSpaceCast(TM, CV, OutContext))81 return E;82 return AsmPrinter::lowerConstant(CV, BaseCV, Offset);83}84