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//===- R600MCInstLower.cpp - Lower R600 MachineInstr to an MCInst ---------===//
//
// 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
/// Code to lower R600 MachineInstrs to their corresponding MCInst.
//
//===----------------------------------------------------------------------===//
//
#include "AMDGPUMCInstLower.h"
#include "MCTargetDesc/R600MCTargetDesc.h"
#include "R600AsmPrinter.h"
#include "R600Subtarget.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
namespace {
class R600MCInstLower : public AMDGPUMCInstLower {
public:
R600MCInstLower(MCContext &ctx, const R600Subtarget &ST,
const AsmPrinter &AP);
/// Lower a MachineInstr to an MCInst
void lower(const MachineInstr *MI, MCInst &OutMI) const;
};
} // namespace
R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST,
const AsmPrinter &AP)
: AMDGPUMCInstLower(Ctx, ST, AP) {}
void R600MCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const {
OutMI.setOpcode(MI->getOpcode());
for (const MachineOperand &MO : MI->explicit_operands()) {
MCOperand MCOp;
lowerOperand(MO, MCOp);
OutMI.addOperand(MCOp);
}
}
void R600AsmPrinter::emitInstruction(const MachineInstr *MI) {
R600_MC::verifyInstructionPredicates(MI->getOpcode(),
getSubtargetInfo().getFeatureBits());
const R600Subtarget &STI = MF->getSubtarget<R600Subtarget>();
R600MCInstLower MCInstLowering(OutContext, STI, *this);
StringRef Err;
if (!STI.getInstrInfo()->verifyInstruction(*MI, Err)) {
LLVMContext &C = MI->getParent()->getParent()->getFunction().getContext();
C.emitError("Illegal instruction detected: " + Err);
MI->print(errs());
}
if (MI->isBundle()) {
const MachineBasicBlock *MBB = MI->getParent();
MachineBasicBlock::const_instr_iterator I = ++MI->getIterator();
while (I != MBB->instr_end() && I->isInsideBundle()) {
emitInstruction(&*I);
++I;
}
} else {
MCInst TmpInst;
MCInstLowering.lower(MI, TmpInst);
EmitToStreamer(*OutStreamer, TmpInst);
}
}
const MCExpr *R600AsmPrinter::lowerConstant(const Constant *CV) {
if (const MCExpr *E = lowerAddrSpaceCast(TM, CV, OutContext))
return E;
return AsmPrinter::lowerConstant(CV);
}
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