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
R600MCInstLower(MCContext & Ctx,const R600Subtarget & ST,const AsmPrinter & AP)32 R600MCInstLower::R600MCInstLower(MCContext &Ctx, const R600Subtarget &ST,
33 const AsmPrinter &AP)
34 : AMDGPUMCInstLower(Ctx, ST, AP) {}
35
lower(const MachineInstr * MI,MCInst & OutMI) const36 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
emitInstruction(const MachineInstr * MI)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
lowerConstant(const Constant * CV)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