forked from OSchip/llvm-project
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
//===- R600MCInstLower.cpp - Lower R600 MachineInstr to an MCInst ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// Code to lower R600 MachineInstrs to their corresponding MCInst.
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//
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//===----------------------------------------------------------------------===//
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//
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#include "AMDGPUMCInstLower.h"
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#include "R600AsmPrinter.h"
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#include "R600Subtarget.h"
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#include "llvm/CodeGen/MachineOperand.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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class R600MCInstLower : public AMDGPUMCInstLower {
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public:
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R600MCInstLower(MCContext &ctx, const R600Subtarget &ST,
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const AsmPrinter &AP);
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/// Lower a MachineInstr to an MCInst
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void lower(const MachineInstr *MI, MCInst &OutMI) const;
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};
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R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST,
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const AsmPrinter &AP)
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: AMDGPUMCInstLower(Ctx, ST, AP) {}
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void R600MCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const {
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OutMI.setOpcode(MI->getOpcode());
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for (const MachineOperand &MO : MI->explicit_operands()) {
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MCOperand MCOp;
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lowerOperand(MO, MCOp);
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OutMI.addOperand(MCOp);
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}
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}
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void R600AsmPrinter::emitInstruction(const MachineInstr *MI) {
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const R600Subtarget &STI = MF->getSubtarget<R600Subtarget>();
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R600MCInstLower MCInstLowering(OutContext, STI, *this);
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StringRef Err;
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if (!STI.getInstrInfo()->verifyInstruction(*MI, Err)) {
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LLVMContext &C = MI->getParent()->getParent()->getFunction().getContext();
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C.emitError("Illegal instruction detected: " + Err);
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MI->print(errs());
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}
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if (MI->isBundle()) {
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const MachineBasicBlock *MBB = MI->getParent();
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MachineBasicBlock::const_instr_iterator I = ++MI->getIterator();
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while (I != MBB->instr_end() && I->isInsideBundle()) {
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emitInstruction(&*I);
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++I;
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}
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} else {
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MCInst TmpInst;
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MCInstLowering.lower(MI, TmpInst);
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EmitToStreamer(*OutStreamer, TmpInst);
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}
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}
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const MCExpr *R600AsmPrinter::lowerConstant(const Constant *CV) {
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if (const MCExpr *E = lowerAddrSpaceCast(TM, CV, OutContext))
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return E;
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return AsmPrinter::lowerConstant(CV);
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}
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