1 //===- AMDGPUMCInstLower.cpp - Lower AMDGPU MachineInstr to an MCInst -----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Code to lower AMDGPU MachineInstrs to their corresponding MCInst.
13 //===----------------------------------------------------------------------===//
16 #include "AMDGPUMCInstLower.h"
17 #include "AMDGPUAsmPrinter.h"
18 #include "AMDGPUTargetMachine.h"
19 #include "InstPrinter/AMDGPUInstPrinter.h"
20 #include "R600InstrInfo.h"
21 #include "SIInstrInfo.h"
22 #include "llvm/CodeGen/MachineBasicBlock.h"
23 #include "llvm/CodeGen/MachineInstr.h"
24 #include "llvm/IR/Constants.h"
25 #include "llvm/IR/Function.h"
26 #include "llvm/IR/GlobalVariable.h"
27 #include "llvm/MC/MCCodeEmitter.h"
28 #include "llvm/MC/MCContext.h"
29 #include "llvm/MC/MCExpr.h"
30 #include "llvm/MC/MCInst.h"
31 #include "llvm/MC/MCObjectStreamer.h"
32 #include "llvm/MC/MCStreamer.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/Format.h"
39 AMDGPUMCInstLower::AMDGPUMCInstLower(MCContext &ctx, const AMDGPUSubtarget &st):
43 void AMDGPUMCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const {
45 int MCOpcode = ST.getInstrInfo()->pseudoToMCOpcode(MI->getOpcode());
48 LLVMContext &C = MI->getParent()->getParent()->getFunction()->getContext();
49 C.emitError("AMDGPUMCInstLower::lower - Pseudo instruction doesn't have "
50 "a target-specific version: " + Twine(MI->getOpcode()));
53 OutMI.setOpcode(MCOpcode);
55 for (const MachineOperand &MO : MI->explicit_operands()) {
57 switch (MO.getType()) {
59 llvm_unreachable("unknown operand type");
60 case MachineOperand::MO_Immediate:
61 MCOp = MCOperand::CreateImm(MO.getImm());
63 case MachineOperand::MO_Register:
64 MCOp = MCOperand::CreateReg(MO.getReg());
66 case MachineOperand::MO_MachineBasicBlock:
67 MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
68 MO.getMBB()->getSymbol(), Ctx));
70 case MachineOperand::MO_GlobalAddress: {
71 const GlobalValue *GV = MO.getGlobal();
72 MCSymbol *Sym = Ctx.GetOrCreateSymbol(StringRef(GV->getName()));
73 MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(Sym, Ctx));
76 case MachineOperand::MO_TargetIndex: {
77 assert(MO.getIndex() == AMDGPU::TI_CONSTDATA_START);
78 MCSymbol *Sym = Ctx.GetOrCreateSymbol(StringRef(END_OF_TEXT_LABEL_NAME));
79 const MCSymbolRefExpr *Expr = MCSymbolRefExpr::Create(Sym, Ctx);
80 MCOp = MCOperand::CreateExpr(Expr);
84 OutMI.addOperand(MCOp);
88 void AMDGPUAsmPrinter::EmitInstruction(const MachineInstr *MI) {
89 AMDGPUMCInstLower MCInstLowering(OutContext,
90 MF->getTarget().getSubtarget<AMDGPUSubtarget>());
94 if (!TM.getSubtargetImpl()->getInstrInfo()->verifyInstruction(MI, Err)) {
95 errs() << "Warning: Illegal instruction detected: " << Err << "\n";
100 const MachineBasicBlock *MBB = MI->getParent();
101 MachineBasicBlock::const_instr_iterator I = MI;
103 while (I != MBB->end() && I->isInsideBundle()) {
109 MCInstLowering.lower(MI, TmpInst);
110 EmitToStreamer(OutStreamer, TmpInst);
113 // Disassemble instruction/operands to text.
114 DisasmLines.resize(DisasmLines.size() + 1);
115 std::string &DisasmLine = DisasmLines.back();
116 raw_string_ostream DisasmStream(DisasmLine);
118 AMDGPUInstPrinter InstPrinter(*TM.getMCAsmInfo(),
119 *TM.getSubtargetImpl()->getInstrInfo(),
120 *TM.getSubtargetImpl()->getRegisterInfo());
121 InstPrinter.printInst(&TmpInst, DisasmStream, StringRef());
123 // Disassemble instruction/operands to hex representation.
124 SmallVector<MCFixup, 4> Fixups;
125 SmallVector<char, 16> CodeBytes;
126 raw_svector_ostream CodeStream(CodeBytes);
128 MCObjectStreamer &ObjStreamer = (MCObjectStreamer &)OutStreamer;
129 MCCodeEmitter &InstEmitter = ObjStreamer.getAssembler().getEmitter();
130 InstEmitter.EncodeInstruction(TmpInst, CodeStream, Fixups,
131 TM.getSubtarget<MCSubtargetInfo>());
134 HexLines.resize(HexLines.size() + 1);
135 std::string &HexLine = HexLines.back();
136 raw_string_ostream HexStream(HexLine);
138 for (size_t i = 0; i < CodeBytes.size(); i += 4) {
139 unsigned int CodeDWord = *(unsigned int *)&CodeBytes[i];
140 HexStream << format("%s%08X", (i > 0 ? " " : ""), CodeDWord);
143 DisasmStream.flush();
144 DisasmLineMaxLen = std::max(DisasmLineMaxLen, DisasmLine.size());