mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
6f86e23c1a
While post-indexed LD1/ST1 instructions do exist for vector loads, this patch makes use of the more flexible addressing-modes in LDR/STR instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207838 91177308-0d34-0410-b5e6-96231b3b80d8
605 lines
22 KiB
C++
605 lines
22 KiB
C++
//===-- ARM64AsmPrinter.cpp - ARM64 LLVM assembly writer ------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains a printer that converts from our internal representation
|
|
// of machine-dependent LLVM code to the ARM64 assembly language.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ARM64.h"
|
|
#include "ARM64MachineFunctionInfo.h"
|
|
#include "ARM64MCInstLower.h"
|
|
#include "ARM64RegisterInfo.h"
|
|
#include "ARM64Subtarget.h"
|
|
#include "InstPrinter/ARM64InstPrinter.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/CodeGen/AsmPrinter.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
#include "llvm/CodeGen/StackMaps.h"
|
|
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
|
|
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
|
|
#include "llvm/IR/DataLayout.h"
|
|
#include "llvm/IR/DebugInfo.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCInstBuilder.h"
|
|
#include "llvm/MC/MCLinkerOptimizationHint.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "asm-printer"
|
|
|
|
namespace {
|
|
|
|
class ARM64AsmPrinter : public AsmPrinter {
|
|
/// Subtarget - Keep a pointer to the ARM64Subtarget around so that we can
|
|
/// make the right decision when printing asm code for different targets.
|
|
const ARM64Subtarget *Subtarget;
|
|
|
|
ARM64MCInstLower MCInstLowering;
|
|
StackMaps SM;
|
|
|
|
public:
|
|
ARM64AsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
|
|
: AsmPrinter(TM, Streamer), Subtarget(&TM.getSubtarget<ARM64Subtarget>()),
|
|
MCInstLowering(OutContext, *Mang, *this), SM(*this), ARM64FI(nullptr),
|
|
LOHLabelCounter(0) {}
|
|
|
|
const char *getPassName() const override { return "ARM64 Assembly Printer"; }
|
|
|
|
/// \brief Wrapper for MCInstLowering.lowerOperand() for the
|
|
/// tblgen'erated pseudo lowering.
|
|
bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp) const {
|
|
return MCInstLowering.lowerOperand(MO, MCOp);
|
|
}
|
|
|
|
void LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
|
|
const MachineInstr &MI);
|
|
void LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
|
|
const MachineInstr &MI);
|
|
/// \brief tblgen'erated driver function for lowering simple MI->MC
|
|
/// pseudo instructions.
|
|
bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
|
|
const MachineInstr *MI);
|
|
|
|
void EmitInstruction(const MachineInstr *MI) override;
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
AsmPrinter::getAnalysisUsage(AU);
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
bool runOnMachineFunction(MachineFunction &F) override {
|
|
ARM64FI = F.getInfo<ARM64FunctionInfo>();
|
|
return AsmPrinter::runOnMachineFunction(F);
|
|
}
|
|
|
|
private:
|
|
MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
|
|
void printOperand(const MachineInstr *MI, unsigned OpNum, raw_ostream &O);
|
|
bool printAsmMRegister(const MachineOperand &MO, char Mode, raw_ostream &O);
|
|
bool printAsmRegInClass(const MachineOperand &MO,
|
|
const TargetRegisterClass *RC, bool isVector,
|
|
raw_ostream &O);
|
|
|
|
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
|
|
unsigned AsmVariant, const char *ExtraCode,
|
|
raw_ostream &O) override;
|
|
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
|
|
unsigned AsmVariant, const char *ExtraCode,
|
|
raw_ostream &O) override;
|
|
|
|
void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
|
|
|
|
void EmitFunctionBodyEnd() override;
|
|
|
|
MCSymbol *GetCPISymbol(unsigned CPID) const override;
|
|
void EmitEndOfAsmFile(Module &M) override;
|
|
ARM64FunctionInfo *ARM64FI;
|
|
|
|
/// \brief Emit the LOHs contained in ARM64FI.
|
|
void EmitLOHs();
|
|
|
|
typedef std::map<const MachineInstr *, MCSymbol *> MInstToMCSymbol;
|
|
MInstToMCSymbol LOHInstToLabel;
|
|
unsigned LOHLabelCounter;
|
|
};
|
|
|
|
} // end of anonymous namespace
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void ARM64AsmPrinter::EmitEndOfAsmFile(Module &M) {
|
|
if (Subtarget->isTargetMachO()) {
|
|
// Funny Darwin hack: This flag tells the linker that no global symbols
|
|
// contain code that falls through to other global symbols (e.g. the obvious
|
|
// implementation of multiple entry points). If this doesn't occur, the
|
|
// linker can safely perform dead code stripping. Since LLVM never
|
|
// generates code that does this, it is always safe to set.
|
|
OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
|
|
SM.serializeToStackMapSection();
|
|
}
|
|
|
|
// Emit a .data.rel section containing any stubs that were created.
|
|
if (Subtarget->isTargetELF()) {
|
|
const TargetLoweringObjectFileELF &TLOFELF =
|
|
static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
|
|
|
|
MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
|
|
|
|
// Output stubs for external and common global variables.
|
|
MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
|
|
if (!Stubs.empty()) {
|
|
OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
|
|
const DataLayout *TD = TM.getDataLayout();
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
|
|
TD->getPointerSize(0));
|
|
}
|
|
Stubs.clear();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
MachineLocation
|
|
ARM64AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
|
|
MachineLocation Location;
|
|
assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
|
|
// Frame address. Currently handles register +- offset only.
|
|
if (MI->getOperand(0).isReg() && MI->getOperand(1).isImm())
|
|
Location.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
|
|
else {
|
|
DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
|
|
}
|
|
return Location;
|
|
}
|
|
|
|
void ARM64AsmPrinter::EmitLOHs() {
|
|
SmallVector<MCSymbol *, 3> MCArgs;
|
|
|
|
for (const auto &D : ARM64FI->getLOHContainer()) {
|
|
for (const MachineInstr *MI : D.getArgs()) {
|
|
MInstToMCSymbol::iterator LabelIt = LOHInstToLabel.find(MI);
|
|
assert(LabelIt != LOHInstToLabel.end() &&
|
|
"Label hasn't been inserted for LOH related instruction");
|
|
MCArgs.push_back(LabelIt->second);
|
|
}
|
|
OutStreamer.EmitLOHDirective(D.getKind(), MCArgs);
|
|
MCArgs.clear();
|
|
}
|
|
}
|
|
|
|
void ARM64AsmPrinter::EmitFunctionBodyEnd() {
|
|
if (!ARM64FI->getLOHRelated().empty())
|
|
EmitLOHs();
|
|
}
|
|
|
|
/// GetCPISymbol - Return the symbol for the specified constant pool entry.
|
|
MCSymbol *ARM64AsmPrinter::GetCPISymbol(unsigned CPID) const {
|
|
// Darwin uses a linker-private symbol name for constant-pools (to
|
|
// avoid addends on the relocation?), ELF has no such concept and
|
|
// uses a normal private symbol.
|
|
if (getDataLayout().getLinkerPrivateGlobalPrefix()[0])
|
|
return OutContext.GetOrCreateSymbol(
|
|
Twine(getDataLayout().getLinkerPrivateGlobalPrefix()) + "CPI" +
|
|
Twine(getFunctionNumber()) + "_" + Twine(CPID));
|
|
|
|
return OutContext.GetOrCreateSymbol(
|
|
Twine(getDataLayout().getPrivateGlobalPrefix()) + "CPI" +
|
|
Twine(getFunctionNumber()) + "_" + Twine(CPID));
|
|
}
|
|
|
|
void ARM64AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNum,
|
|
raw_ostream &O) {
|
|
const MachineOperand &MO = MI->getOperand(OpNum);
|
|
switch (MO.getType()) {
|
|
default:
|
|
assert(0 && "<unknown operand type>");
|
|
case MachineOperand::MO_Register: {
|
|
unsigned Reg = MO.getReg();
|
|
assert(TargetRegisterInfo::isPhysicalRegister(Reg));
|
|
assert(!MO.getSubReg() && "Subregs should be eliminated!");
|
|
O << ARM64InstPrinter::getRegisterName(Reg);
|
|
break;
|
|
}
|
|
case MachineOperand::MO_Immediate: {
|
|
int64_t Imm = MO.getImm();
|
|
O << '#' << Imm;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ARM64AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode,
|
|
raw_ostream &O) {
|
|
unsigned Reg = MO.getReg();
|
|
switch (Mode) {
|
|
default:
|
|
return true; // Unknown mode.
|
|
case 'w':
|
|
Reg = getWRegFromXReg(Reg);
|
|
break;
|
|
case 'x':
|
|
Reg = getXRegFromWReg(Reg);
|
|
break;
|
|
}
|
|
|
|
O << ARM64InstPrinter::getRegisterName(Reg);
|
|
return false;
|
|
}
|
|
|
|
// Prints the register in MO using class RC using the offset in the
|
|
// new register class. This should not be used for cross class
|
|
// printing.
|
|
bool ARM64AsmPrinter::printAsmRegInClass(const MachineOperand &MO,
|
|
const TargetRegisterClass *RC,
|
|
bool isVector, raw_ostream &O) {
|
|
assert(MO.isReg() && "Should only get here with a register!");
|
|
const ARM64RegisterInfo *RI =
|
|
static_cast<const ARM64RegisterInfo *>(TM.getRegisterInfo());
|
|
unsigned Reg = MO.getReg();
|
|
unsigned RegToPrint = RC->getRegister(RI->getEncodingValue(Reg));
|
|
assert(RI->regsOverlap(RegToPrint, Reg));
|
|
O << ARM64InstPrinter::getRegisterName(
|
|
RegToPrint, isVector ? ARM64::vreg : ARM64::NoRegAltName);
|
|
return false;
|
|
}
|
|
|
|
bool ARM64AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode, raw_ostream &O) {
|
|
const MachineOperand &MO = MI->getOperand(OpNum);
|
|
// Does this asm operand have a single letter operand modifier?
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0)
|
|
return true; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default:
|
|
return true; // Unknown modifier.
|
|
case 'w': // Print W register
|
|
case 'x': // Print X register
|
|
if (MO.isReg())
|
|
return printAsmMRegister(MO, ExtraCode[0], O);
|
|
if (MO.isImm() && MO.getImm() == 0) {
|
|
unsigned Reg = ExtraCode[0] == 'w' ? ARM64::WZR : ARM64::XZR;
|
|
O << ARM64InstPrinter::getRegisterName(Reg);
|
|
return false;
|
|
}
|
|
printOperand(MI, OpNum, O);
|
|
return false;
|
|
case 'b': // Print B register.
|
|
case 'h': // Print H register.
|
|
case 's': // Print S register.
|
|
case 'd': // Print D register.
|
|
case 'q': // Print Q register.
|
|
if (MO.isReg()) {
|
|
const TargetRegisterClass *RC;
|
|
switch (ExtraCode[0]) {
|
|
case 'b':
|
|
RC = &ARM64::FPR8RegClass;
|
|
break;
|
|
case 'h':
|
|
RC = &ARM64::FPR16RegClass;
|
|
break;
|
|
case 's':
|
|
RC = &ARM64::FPR32RegClass;
|
|
break;
|
|
case 'd':
|
|
RC = &ARM64::FPR64RegClass;
|
|
break;
|
|
case 'q':
|
|
RC = &ARM64::FPR128RegClass;
|
|
break;
|
|
default:
|
|
return true;
|
|
}
|
|
return printAsmRegInClass(MO, RC, false /* vector */, O);
|
|
}
|
|
printOperand(MI, OpNum, O);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// According to ARM, we should emit x and v registers unless we have a
|
|
// modifier.
|
|
if (MO.isReg()) {
|
|
unsigned Reg = MO.getReg();
|
|
|
|
// If this is a w or x register, print an x register.
|
|
if (ARM64::GPR32allRegClass.contains(Reg) ||
|
|
ARM64::GPR64allRegClass.contains(Reg))
|
|
return printAsmMRegister(MO, 'x', O);
|
|
|
|
// If this is a b, h, s, d, or q register, print it as a v register.
|
|
return printAsmRegInClass(MO, &ARM64::FPR128RegClass, true /* vector */, O);
|
|
}
|
|
|
|
printOperand(MI, OpNum, O);
|
|
return false;
|
|
}
|
|
|
|
bool ARM64AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
|
|
unsigned OpNum, unsigned AsmVariant,
|
|
const char *ExtraCode,
|
|
raw_ostream &O) {
|
|
if (ExtraCode && ExtraCode[0])
|
|
return true; // Unknown modifier.
|
|
|
|
const MachineOperand &MO = MI->getOperand(OpNum);
|
|
assert(MO.isReg() && "unexpected inline asm memory operand");
|
|
O << "[" << ARM64InstPrinter::getRegisterName(MO.getReg()) << "]";
|
|
return false;
|
|
}
|
|
|
|
void ARM64AsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
|
|
raw_ostream &OS) {
|
|
unsigned NOps = MI->getNumOperands();
|
|
assert(NOps == 4);
|
|
OS << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
|
|
// cast away const; DIetc do not take const operands for some reason.
|
|
DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps - 1).getMetadata()));
|
|
OS << V.getName();
|
|
OS << " <- ";
|
|
// Frame address. Currently handles register +- offset only.
|
|
assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
|
|
OS << '[';
|
|
printOperand(MI, 0, OS);
|
|
OS << '+';
|
|
printOperand(MI, 1, OS);
|
|
OS << ']';
|
|
OS << "+";
|
|
printOperand(MI, NOps - 2, OS);
|
|
}
|
|
|
|
void ARM64AsmPrinter::LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
|
|
const MachineInstr &MI) {
|
|
unsigned NumNOPBytes = MI.getOperand(1).getImm();
|
|
|
|
SM.recordStackMap(MI);
|
|
// Emit padding.
|
|
assert(NumNOPBytes % 4 == 0 && "Invalid number of NOP bytes requested!");
|
|
for (unsigned i = 0; i < NumNOPBytes; i += 4)
|
|
EmitToStreamer(OutStreamer, MCInstBuilder(ARM64::HINT).addImm(0));
|
|
}
|
|
|
|
// Lower a patchpoint of the form:
|
|
// [<def>], <id>, <numBytes>, <target>, <numArgs>
|
|
void ARM64AsmPrinter::LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
|
|
const MachineInstr &MI) {
|
|
SM.recordPatchPoint(MI);
|
|
|
|
PatchPointOpers Opers(&MI);
|
|
|
|
int64_t CallTarget = Opers.getMetaOper(PatchPointOpers::TargetPos).getImm();
|
|
unsigned EncodedBytes = 0;
|
|
if (CallTarget) {
|
|
assert((CallTarget & 0xFFFFFFFFFFFF) == CallTarget &&
|
|
"High 16 bits of call target should be zero.");
|
|
unsigned ScratchReg = MI.getOperand(Opers.getNextScratchIdx()).getReg();
|
|
EncodedBytes = 16;
|
|
// Materialize the jump address:
|
|
EmitToStreamer(OutStreamer, MCInstBuilder(ARM64::MOVZWi)
|
|
.addReg(ScratchReg)
|
|
.addImm((CallTarget >> 32) & 0xFFFF)
|
|
.addImm(32));
|
|
EmitToStreamer(OutStreamer, MCInstBuilder(ARM64::MOVKWi)
|
|
.addReg(ScratchReg)
|
|
.addReg(ScratchReg)
|
|
.addImm((CallTarget >> 16) & 0xFFFF)
|
|
.addImm(16));
|
|
EmitToStreamer(OutStreamer, MCInstBuilder(ARM64::MOVKWi)
|
|
.addReg(ScratchReg)
|
|
.addReg(ScratchReg)
|
|
.addImm(CallTarget & 0xFFFF)
|
|
.addImm(0));
|
|
EmitToStreamer(OutStreamer, MCInstBuilder(ARM64::BLR).addReg(ScratchReg));
|
|
}
|
|
// Emit padding.
|
|
unsigned NumBytes = Opers.getMetaOper(PatchPointOpers::NBytesPos).getImm();
|
|
assert(NumBytes >= EncodedBytes &&
|
|
"Patchpoint can't request size less than the length of a call.");
|
|
assert((NumBytes - EncodedBytes) % 4 == 0 &&
|
|
"Invalid number of NOP bytes requested!");
|
|
for (unsigned i = EncodedBytes; i < NumBytes; i += 4)
|
|
EmitToStreamer(OutStreamer, MCInstBuilder(ARM64::HINT).addImm(0));
|
|
}
|
|
|
|
// Simple pseudo-instructions have their lowering (with expansion to real
|
|
// instructions) auto-generated.
|
|
#include "ARM64GenMCPseudoLowering.inc"
|
|
|
|
static unsigned getRealIndexedOpcode(unsigned Opc) {
|
|
switch (Opc) {
|
|
case ARM64::LDRXpre_isel: return ARM64::LDRXpre;
|
|
case ARM64::LDRWpre_isel: return ARM64::LDRWpre;
|
|
case ARM64::LDRQpre_isel: return ARM64::LDRQpre;
|
|
case ARM64::LDRDpre_isel: return ARM64::LDRDpre;
|
|
case ARM64::LDRSpre_isel: return ARM64::LDRSpre;
|
|
case ARM64::LDRBBpre_isel: return ARM64::LDRBBpre;
|
|
case ARM64::LDRHHpre_isel: return ARM64::LDRHHpre;
|
|
case ARM64::LDRSBWpre_isel: return ARM64::LDRSBWpre;
|
|
case ARM64::LDRSBXpre_isel: return ARM64::LDRSBXpre;
|
|
case ARM64::LDRSHWpre_isel: return ARM64::LDRSHWpre;
|
|
case ARM64::LDRSHXpre_isel: return ARM64::LDRSHXpre;
|
|
case ARM64::LDRSWpre_isel: return ARM64::LDRSWpre;
|
|
|
|
case ARM64::LDRQpost_isel: return ARM64::LDRQpost;
|
|
case ARM64::LDRDpost_isel: return ARM64::LDRDpost;
|
|
case ARM64::LDRSpost_isel: return ARM64::LDRSpost;
|
|
case ARM64::LDRXpost_isel: return ARM64::LDRXpost;
|
|
case ARM64::LDRWpost_isel: return ARM64::LDRWpost;
|
|
case ARM64::LDRHHpost_isel: return ARM64::LDRHHpost;
|
|
case ARM64::LDRBBpost_isel: return ARM64::LDRBBpost;
|
|
case ARM64::LDRSWpost_isel: return ARM64::LDRSWpost;
|
|
case ARM64::LDRSHWpost_isel: return ARM64::LDRSHWpost;
|
|
case ARM64::LDRSHXpost_isel: return ARM64::LDRSHXpost;
|
|
case ARM64::LDRSBWpost_isel: return ARM64::LDRSBWpost;
|
|
case ARM64::LDRSBXpost_isel: return ARM64::LDRSBXpost;
|
|
|
|
case ARM64::STRXpre_isel: return ARM64::STRXpre;
|
|
case ARM64::STRWpre_isel: return ARM64::STRWpre;
|
|
case ARM64::STRHHpre_isel: return ARM64::STRHHpre;
|
|
case ARM64::STRBBpre_isel: return ARM64::STRBBpre;
|
|
case ARM64::STRQpre_isel: return ARM64::STRQpre;
|
|
case ARM64::STRDpre_isel: return ARM64::STRDpre;
|
|
case ARM64::STRSpre_isel: return ARM64::STRSpre;
|
|
}
|
|
llvm_unreachable("Unexpected pre-indexed opcode!");
|
|
}
|
|
|
|
void ARM64AsmPrinter::EmitInstruction(const MachineInstr *MI) {
|
|
// Do any auto-generated pseudo lowerings.
|
|
if (emitPseudoExpansionLowering(OutStreamer, MI))
|
|
return;
|
|
|
|
if (ARM64FI->getLOHRelated().count(MI)) {
|
|
// Generate a label for LOH related instruction
|
|
MCSymbol *LOHLabel = GetTempSymbol("loh", LOHLabelCounter++);
|
|
// Associate the instruction with the label
|
|
LOHInstToLabel[MI] = LOHLabel;
|
|
OutStreamer.EmitLabel(LOHLabel);
|
|
}
|
|
|
|
// Do any manual lowerings.
|
|
switch (MI->getOpcode()) {
|
|
default:
|
|
break;
|
|
case ARM64::DBG_VALUE: {
|
|
if (isVerbose() && OutStreamer.hasRawTextSupport()) {
|
|
SmallString<128> TmpStr;
|
|
raw_svector_ostream OS(TmpStr);
|
|
PrintDebugValueComment(MI, OS);
|
|
OutStreamer.EmitRawText(StringRef(OS.str()));
|
|
}
|
|
return;
|
|
}
|
|
// Indexed loads and stores use a pseudo to handle complex operand
|
|
// tricks and writeback to the base register. We strip off the writeback
|
|
// operand and switch the opcode here. Post-indexed stores were handled by the
|
|
// tablegen'erated pseudos above. (The complex operand <--> simple
|
|
// operand isel is beyond tablegen's ability, so we do these manually).
|
|
case ARM64::LDRHHpre_isel:
|
|
case ARM64::LDRBBpre_isel:
|
|
case ARM64::LDRXpre_isel:
|
|
case ARM64::LDRWpre_isel:
|
|
case ARM64::LDRQpre_isel:
|
|
case ARM64::LDRDpre_isel:
|
|
case ARM64::LDRSpre_isel:
|
|
case ARM64::LDRSBWpre_isel:
|
|
case ARM64::LDRSBXpre_isel:
|
|
case ARM64::LDRSHWpre_isel:
|
|
case ARM64::LDRSHXpre_isel:
|
|
case ARM64::LDRSWpre_isel:
|
|
case ARM64::LDRQpost_isel:
|
|
case ARM64::LDRDpost_isel:
|
|
case ARM64::LDRSpost_isel:
|
|
case ARM64::LDRXpost_isel:
|
|
case ARM64::LDRWpost_isel:
|
|
case ARM64::LDRHHpost_isel:
|
|
case ARM64::LDRBBpost_isel:
|
|
case ARM64::LDRSWpost_isel:
|
|
case ARM64::LDRSHWpost_isel:
|
|
case ARM64::LDRSHXpost_isel:
|
|
case ARM64::LDRSBWpost_isel:
|
|
case ARM64::LDRSBXpost_isel: {
|
|
MCInst TmpInst;
|
|
// For loads, the writeback operand to be skipped is the second.
|
|
TmpInst.setOpcode(getRealIndexedOpcode(MI->getOpcode()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(2).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
|
|
EmitToStreamer(OutStreamer, TmpInst);
|
|
return;
|
|
}
|
|
case ARM64::STRXpre_isel:
|
|
case ARM64::STRWpre_isel:
|
|
case ARM64::STRHHpre_isel:
|
|
case ARM64::STRBBpre_isel:
|
|
case ARM64::STRQpre_isel:
|
|
case ARM64::STRDpre_isel:
|
|
case ARM64::STRSpre_isel: {
|
|
MCInst TmpInst;
|
|
// For loads, the writeback operand to be skipped is the first.
|
|
TmpInst.setOpcode(getRealIndexedOpcode(MI->getOpcode()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(2).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
|
|
EmitToStreamer(OutStreamer, TmpInst);
|
|
return;
|
|
}
|
|
|
|
// Tail calls use pseudo instructions so they have the proper code-gen
|
|
// attributes (isCall, isReturn, etc.). We lower them to the real
|
|
// instruction here.
|
|
case ARM64::TCRETURNri: {
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM64::BR);
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
EmitToStreamer(OutStreamer, TmpInst);
|
|
return;
|
|
}
|
|
case ARM64::TCRETURNdi: {
|
|
MCOperand Dest;
|
|
MCInstLowering.lowerOperand(MI->getOperand(0), Dest);
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM64::B);
|
|
TmpInst.addOperand(Dest);
|
|
EmitToStreamer(OutStreamer, TmpInst);
|
|
return;
|
|
}
|
|
case ARM64::TLSDESC_BLR: {
|
|
MCOperand Callee, Sym;
|
|
MCInstLowering.lowerOperand(MI->getOperand(0), Callee);
|
|
MCInstLowering.lowerOperand(MI->getOperand(1), Sym);
|
|
|
|
// First emit a relocation-annotation. This expands to no code, but requests
|
|
// the following instruction gets an R_AARCH64_TLSDESC_CALL.
|
|
MCInst TLSDescCall;
|
|
TLSDescCall.setOpcode(ARM64::TLSDESCCALL);
|
|
TLSDescCall.addOperand(Sym);
|
|
EmitToStreamer(OutStreamer, TLSDescCall);
|
|
|
|
// Other than that it's just a normal indirect call to the function loaded
|
|
// from the descriptor.
|
|
MCInst BLR;
|
|
BLR.setOpcode(ARM64::BLR);
|
|
BLR.addOperand(Callee);
|
|
EmitToStreamer(OutStreamer, BLR);
|
|
|
|
return;
|
|
}
|
|
|
|
case TargetOpcode::STACKMAP:
|
|
return LowerSTACKMAP(OutStreamer, SM, *MI);
|
|
|
|
case TargetOpcode::PATCHPOINT:
|
|
return LowerPATCHPOINT(OutStreamer, SM, *MI);
|
|
}
|
|
|
|
// Finally, do the automated lowerings for everything else.
|
|
MCInst TmpInst;
|
|
MCInstLowering.Lower(MI, TmpInst);
|
|
EmitToStreamer(OutStreamer, TmpInst);
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeARM64AsmPrinter() {
|
|
RegisterAsmPrinter<ARM64AsmPrinter> X(TheARM64leTarget);
|
|
RegisterAsmPrinter<ARM64AsmPrinter> Y(TheARM64beTarget);
|
|
}
|