[WebAssembly] Add WebAssemblyMCInstLower.cpp.
This isn't used yet; it's just a start towards eventually using MC to do instruction printing, and eventually binary encoding. llvm-svn: 252194
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@ -19,6 +19,7 @@ add_llvm_target(WebAssemblyCodeGen
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WebAssemblyISelLowering.cpp
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WebAssemblyInstrInfo.cpp
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WebAssemblyMachineFunctionInfo.cpp
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WebAssemblyMCInstLower.cpp
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WebAssemblyRegisterInfo.cpp
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WebAssemblySelectionDAGInfo.cpp
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WebAssemblySubtarget.cpp
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@ -21,6 +21,7 @@
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include <cctype>
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using namespace llvm;
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@ -35,7 +36,10 @@ WebAssemblyInstPrinter::WebAssemblyInstPrinter(const MCAsmInfo &MAI,
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void WebAssemblyInstPrinter::printRegName(raw_ostream &OS,
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unsigned RegNo) const {
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OS << getRegisterName(RegNo);
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if (TargetRegisterInfo::isPhysicalRegister(RegNo))
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OS << getRegisterName(RegNo);
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else
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OS << TargetRegisterInfo::virtReg2Index(RegNo);
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}
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void WebAssemblyInstPrinter::printInst(const MCInst *MI, raw_ostream &OS,
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@ -43,15 +47,31 @@ void WebAssemblyInstPrinter::printInst(const MCInst *MI, raw_ostream &OS,
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const MCSubtargetInfo &STI) {
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printInstruction(MI, OS);
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printAnnotation(OS, Annot);
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unsigned NumDefs = MII.get(MI->getOpcode()).getNumDefs();
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assert(NumDefs <= 1 &&
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"Instructions with multiple result values not implemented");
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if (NumDefs != 0) {
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OS << "\n"
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"\t" "set_local ";
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printRegName(OS, MI->getOperand(0).getReg());
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OS << ", pop";
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}
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}
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void WebAssemblyInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O) {
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const MCOperand &Op = MI->getOperand(OpNo);
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if (Op.isReg())
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O << getRegisterName(Op.getReg());
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else if (Op.isImm())
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if (Op.isReg()) {
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if (OpNo < MII.get(MI->getOpcode()).getNumDefs())
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O << "push";
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else
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printRegName(O, Op.getReg());
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} else if (Op.isImm())
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O << '#' << Op.getImm();
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else if (Op.isFPImm())
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O << '#' << Op.getFPImm();
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else {
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assert(Op.isExpr() && "unknown operand kind in printOperand");
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Op.getExpr()->print(O, &MAI);
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@ -40,6 +40,12 @@ static MCAsmInfo *createWebAssemblyMCAsmInfo(const MCRegisterInfo &MRI,
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return new WebAssemblyMCAsmInfo(TT);
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}
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static MCInstrInfo *createWebAssemblyMCInstrInfo() {
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MCInstrInfo *X = new MCInstrInfo();
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InitWebAssemblyMCInstrInfo(X);
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return X;
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}
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static MCInstPrinter *
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createWebAssemblyMCInstPrinter(const Triple &T, unsigned SyntaxVariant,
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const MCAsmInfo &MAI, const MCInstrInfo &MII,
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@ -54,6 +60,9 @@ extern "C" void LLVMInitializeWebAssemblyTargetMC() {
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// Register the MC asm info.
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RegisterMCAsmInfoFn X(*T, createWebAssemblyMCAsmInfo);
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// Register the MC instruction info.
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TargetRegistry::RegisterMCInstrInfo(*T, createWebAssemblyMCInstrInfo);
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// Register the MCInstPrinter.
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TargetRegistry::RegisterMCInstPrinter(*T, createWebAssemblyMCInstPrinter);
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}
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@ -0,0 +1,84 @@
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// WebAssemblyMCInstLower.cpp - Convert WebAssembly MachineInstr to an MCInst //
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file contains code to lower WebAssembly MachineInstrs to their
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/// corresponding MCInst records.
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///
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//===----------------------------------------------------------------------===//
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#include "WebAssemblyMCInstLower.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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MCSymbol *
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WebAssemblyMCInstLower::GetGlobalAddressSymbol(const MachineOperand &MO) const {
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return Printer.getSymbol(MO.getGlobal());
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}
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MCOperand WebAssemblyMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
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MCSymbol *Sym) const {
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const MCExpr *Expr = MCSymbolRefExpr::create(Sym, Ctx);
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if (!MO.isJTI() && MO.getOffset())
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llvm_unreachable("unknown symbol op");
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return MCOperand::createExpr(Expr);
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}
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void WebAssemblyMCInstLower::Lower(const MachineInstr *MI,
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MCInst &OutMI) const {
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OutMI.setOpcode(MI->getOpcode());
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for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
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const MachineOperand &MO = MI->getOperand(i);
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MCOperand MCOp;
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switch (MO.getType()) {
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default:
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MI->dump();
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llvm_unreachable("unknown operand type");
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case MachineOperand::MO_Register:
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// Ignore all implicit register operands.
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if (MO.isImplicit())
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continue;
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MCOp = MCOperand::createReg(MO.getReg());
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break;
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case MachineOperand::MO_Immediate:
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MCOp = MCOperand::createImm(MO.getImm());
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break;
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case MachineOperand::MO_FPImmediate:
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MCOp = MCOperand::createFPImm(
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MO.getFPImm()->getValueAPF().convertToDouble());
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break;
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case MachineOperand::MO_MachineBasicBlock:
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MCOp = MCOperand::createExpr(
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MCSymbolRefExpr::create(MO.getMBB()->getSymbol(), Ctx));
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break;
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case MachineOperand::MO_RegisterMask:
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continue;
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case MachineOperand::MO_GlobalAddress:
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MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
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break;
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}
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OutMI.addOperand(MCOp);
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}
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}
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@ -0,0 +1,50 @@
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//===-- WebAssemblyMCInstLower.h - Lower MachineInstr to MCInst -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file declares the class to lower WebAssembly MachineInstrs to
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/// their corresponding MCInst records.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMCINSTLOWER_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMCINSTLOWER_H
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class AsmPrinter;
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class MCContext;
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class MCInst;
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class MCOperand;
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class MCSymbol;
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class MachineInstr;
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class MachineModuleInfoMachO;
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class MachineOperand;
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class Mangler;
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// WebAssemblyMCInstLower - This class is used to lower an MachineInstr into an
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// MCInst.
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class LLVM_LIBRARY_VISIBILITY WebAssemblyMCInstLower {
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MCContext &Ctx;
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AsmPrinter &Printer;
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public:
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WebAssemblyMCInstLower(MCContext &ctx, AsmPrinter &printer)
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: Ctx(ctx), Printer(printer) {}
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void Lower(const MachineInstr *MI, MCInst &OutMI) const;
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MCOperand LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const;
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MCSymbol *GetGlobalAddressSymbol(const MachineOperand &MO) const;
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};
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}
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#endif
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