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 namespace { 24 class R600MCInstLower : public AMDGPUMCInstLower { 25 public: 26 R600MCInstLower(MCContext &ctx, const R600Subtarget &ST, 27 const AsmPrinter &AP); 28 29 /// Lower a MachineInstr to an MCInst 30 void lower(const MachineInstr *MI, MCInst &OutMI) const; 31 }; 32 } // namespace 33 34 R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST, 35 const AsmPrinter &AP) 36 : AMDGPUMCInstLower(Ctx, ST, AP) {} 37 38 void R600MCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const { 39 OutMI.setOpcode(MI->getOpcode()); 40 for (const MachineOperand &MO : MI->explicit_operands()) { 41 MCOperand MCOp; 42 lowerOperand(MO, MCOp); 43 OutMI.addOperand(MCOp); 44 } 45 } 46 47 void R600AsmPrinter::emitInstruction(const MachineInstr *MI) { 48 R600_MC::verifyInstructionPredicates(MI->getOpcode(), 49 getSubtargetInfo().getFeatureBits()); 50 51 const R600Subtarget &STI = MF->getSubtarget<R600Subtarget>(); 52 R600MCInstLower MCInstLowering(OutContext, STI, *this); 53 54 StringRef Err; 55 if (!STI.getInstrInfo()->verifyInstruction(*MI, Err)) { 56 LLVMContext &C = MI->getParent()->getParent()->getFunction().getContext(); 57 C.emitError("Illegal instruction detected: " + Err); 58 MI->print(errs()); 59 } 60 61 if (MI->isBundle()) { 62 const MachineBasicBlock *MBB = MI->getParent(); 63 MachineBasicBlock::const_instr_iterator I = ++MI->getIterator(); 64 while (I != MBB->instr_end() && I->isInsideBundle()) { 65 emitInstruction(&*I); 66 ++I; 67 } 68 } else { 69 MCInst TmpInst; 70 MCInstLowering.lower(MI, TmpInst); 71 EmitToStreamer(*OutStreamer, TmpInst); 72 } 73 } 74 75 const MCExpr *R600AsmPrinter::lowerConstant(const Constant *CV) { 76 if (const MCExpr *E = lowerAddrSpaceCast(TM, CV, OutContext)) 77 return E; 78 return AsmPrinter::lowerConstant(CV); 79 } 80