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
R600MCInstLower(MCContext & Ctx,const R600Subtarget & ST,const AsmPrinter & AP)34 R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST,
35 const AsmPrinter &AP)
36 : AMDGPUMCInstLower(Ctx, ST, AP) {}
37
lower(const MachineInstr * MI,MCInst & OutMI) const38 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
emitInstruction(const MachineInstr * MI)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
lowerConstant(const Constant * CV)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