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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 /// \file 10 /// 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 23 class R600MCInstLower : public AMDGPUMCInstLower { 24 public: 25 R600MCInstLower(MCContext &ctx, const R600Subtarget &ST, 26 const AsmPrinter &AP); 27 28 /// Lower a MachineInstr to an MCInst 29 void lower(const MachineInstr *MI, MCInst &OutMI) const; 30 }; 31 32 R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST, 33 const AsmPrinter &AP) 34 : AMDGPUMCInstLower(Ctx, ST, AP) {} 35 36 void R600MCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const { 37 OutMI.setOpcode(MI->getOpcode()); 38 for (const MachineOperand &MO : MI->explicit_operands()) { 39 MCOperand MCOp; 40 lowerOperand(MO, MCOp); 41 OutMI.addOperand(MCOp); 42 } 43 } 44 45 void R600AsmPrinter::emitInstruction(const MachineInstr *MI) { 46 R600_MC::verifyInstructionPredicates(MI->getOpcode(), 47 getSubtargetInfo().getFeatureBits()); 48 49 const R600Subtarget &STI = MF->getSubtarget<R600Subtarget>(); 50 R600MCInstLower MCInstLowering(OutContext, STI, *this); 51 52 StringRef Err; 53 if (!STI.getInstrInfo()->verifyInstruction(*MI, Err)) { 54 LLVMContext &C = MI->getParent()->getParent()->getFunction().getContext(); 55 C.emitError("Illegal instruction detected: " + Err); 56 MI->print(errs()); 57 } 58 59 if (MI->isBundle()) { 60 const MachineBasicBlock *MBB = MI->getParent(); 61 MachineBasicBlock::const_instr_iterator I = ++MI->getIterator(); 62 while (I != MBB->instr_end() && I->isInsideBundle()) { 63 emitInstruction(&*I); 64 ++I; 65 } 66 } else { 67 MCInst TmpInst; 68 MCInstLowering.lower(MI, TmpInst); 69 EmitToStreamer(*OutStreamer, TmpInst); 70 } 71 } 72 73 const MCExpr *R600AsmPrinter::lowerConstant(const Constant *CV) { 74 if (const MCExpr *E = lowerAddrSpaceCast(TM, CV, OutContext)) 75 return E; 76 return AsmPrinter::lowerConstant(CV); 77 } 78