mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 02:32:08 +00:00
7a2bdde0a0
Luis Felipe Strano Moraes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
1811 lines
65 KiB
C++
1811 lines
65 KiB
C++
//===-- ARMAsmPrinter.cpp - Print machine code to an ARM .s file ----------===//
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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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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to GAS-format ARM assembly language.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "asm-printer"
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#include "ARM.h"
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#include "ARMAsmPrinter.h"
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#include "ARMAddressingModes.h"
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#include "ARMBuildAttrs.h"
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#include "ARMBaseRegisterInfo.h"
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#include "ARMConstantPoolValue.h"
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#include "ARMMachineFunctionInfo.h"
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#include "ARMMCExpr.h"
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#include "ARMTargetMachine.h"
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#include "ARMTargetObjectFile.h"
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#include "InstPrinter/ARMInstPrinter.h"
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Constants.h"
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#include "llvm/Module.h"
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#include "llvm/Type.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCAssembler.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/MC/MCSectionMachO.h"
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#include "llvm/MC/MCObjectStreamer.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Target/Mangler.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Target/TargetRegistry.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cctype>
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using namespace llvm;
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namespace {
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// Per section and per symbol attributes are not supported.
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// To implement them we would need the ability to delay this emission
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// until the assembly file is fully parsed/generated as only then do we
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// know the symbol and section numbers.
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class AttributeEmitter {
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public:
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virtual void MaybeSwitchVendor(StringRef Vendor) = 0;
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virtual void EmitAttribute(unsigned Attribute, unsigned Value) = 0;
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virtual void EmitTextAttribute(unsigned Attribute, StringRef String) = 0;
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virtual void Finish() = 0;
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virtual ~AttributeEmitter() {}
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};
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class AsmAttributeEmitter : public AttributeEmitter {
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MCStreamer &Streamer;
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public:
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AsmAttributeEmitter(MCStreamer &Streamer_) : Streamer(Streamer_) {}
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void MaybeSwitchVendor(StringRef Vendor) { }
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void EmitAttribute(unsigned Attribute, unsigned Value) {
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Streamer.EmitRawText("\t.eabi_attribute " +
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Twine(Attribute) + ", " + Twine(Value));
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}
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void EmitTextAttribute(unsigned Attribute, StringRef String) {
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switch (Attribute) {
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case ARMBuildAttrs::CPU_name:
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Streamer.EmitRawText(StringRef("\t.cpu ") + LowercaseString(String));
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break;
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/* GAS requires .fpu to be emitted regardless of EABI attribute */
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case ARMBuildAttrs::Advanced_SIMD_arch:
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case ARMBuildAttrs::VFP_arch:
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Streamer.EmitRawText(StringRef("\t.fpu ") + LowercaseString(String));
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break;
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default: assert(0 && "Unsupported Text attribute in ASM Mode"); break;
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}
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}
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void Finish() { }
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};
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class ObjectAttributeEmitter : public AttributeEmitter {
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MCObjectStreamer &Streamer;
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StringRef CurrentVendor;
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SmallString<64> Contents;
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public:
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ObjectAttributeEmitter(MCObjectStreamer &Streamer_) :
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Streamer(Streamer_), CurrentVendor("") { }
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void MaybeSwitchVendor(StringRef Vendor) {
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assert(!Vendor.empty() && "Vendor cannot be empty.");
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if (CurrentVendor.empty())
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CurrentVendor = Vendor;
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else if (CurrentVendor == Vendor)
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return;
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else
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Finish();
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CurrentVendor = Vendor;
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assert(Contents.size() == 0);
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}
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void EmitAttribute(unsigned Attribute, unsigned Value) {
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// FIXME: should be ULEB
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Contents += Attribute;
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Contents += Value;
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}
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void EmitTextAttribute(unsigned Attribute, StringRef String) {
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Contents += Attribute;
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Contents += UppercaseString(String);
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Contents += 0;
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}
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void Finish() {
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const size_t ContentsSize = Contents.size();
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// Vendor size + Vendor name + '\0'
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const size_t VendorHeaderSize = 4 + CurrentVendor.size() + 1;
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// Tag + Tag Size
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const size_t TagHeaderSize = 1 + 4;
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Streamer.EmitIntValue(VendorHeaderSize + TagHeaderSize + ContentsSize, 4);
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Streamer.EmitBytes(CurrentVendor, 0);
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Streamer.EmitIntValue(0, 1); // '\0'
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Streamer.EmitIntValue(ARMBuildAttrs::File, 1);
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Streamer.EmitIntValue(TagHeaderSize + ContentsSize, 4);
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Streamer.EmitBytes(Contents, 0);
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Contents.clear();
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}
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};
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} // end of anonymous namespace
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MachineLocation ARMAsmPrinter::
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getDebugValueLocation(const MachineInstr *MI) const {
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MachineLocation Location;
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assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
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// Frame address. Currently handles register +- offset only.
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if (MI->getOperand(0).isReg() && MI->getOperand(1).isImm())
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Location.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
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else {
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DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
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}
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return Location;
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}
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void ARMAsmPrinter::EmitFunctionEntryLabel() {
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if (AFI->isThumbFunction()) {
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OutStreamer.EmitAssemblerFlag(MCAF_Code16);
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OutStreamer.EmitThumbFunc(Subtarget->isTargetDarwin()? CurrentFnSym : 0);
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}
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OutStreamer.EmitLabel(CurrentFnSym);
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}
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/// runOnMachineFunction - This uses the EmitInstruction()
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/// method to print assembly for each instruction.
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///
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bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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AFI = MF.getInfo<ARMFunctionInfo>();
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MCP = MF.getConstantPool();
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return AsmPrinter::runOnMachineFunction(MF);
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}
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void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
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raw_ostream &O, const char *Modifier) {
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const MachineOperand &MO = MI->getOperand(OpNum);
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unsigned TF = MO.getTargetFlags();
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switch (MO.getType()) {
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default:
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assert(0 && "<unknown operand type>");
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case MachineOperand::MO_Register: {
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unsigned Reg = MO.getReg();
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assert(TargetRegisterInfo::isPhysicalRegister(Reg));
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assert(!MO.getSubReg() && "Subregs should be eliminated!");
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O << ARMInstPrinter::getRegisterName(Reg);
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break;
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}
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case MachineOperand::MO_Immediate: {
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int64_t Imm = MO.getImm();
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O << '#';
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if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
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(TF == ARMII::MO_LO16))
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O << ":lower16:";
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else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
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(TF == ARMII::MO_HI16))
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O << ":upper16:";
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O << Imm;
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break;
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}
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case MachineOperand::MO_MachineBasicBlock:
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O << *MO.getMBB()->getSymbol();
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return;
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case MachineOperand::MO_GlobalAddress: {
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const GlobalValue *GV = MO.getGlobal();
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if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
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(TF & ARMII::MO_LO16))
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O << ":lower16:";
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else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
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(TF & ARMII::MO_HI16))
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O << ":upper16:";
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O << *Mang->getSymbol(GV);
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printOffset(MO.getOffset(), O);
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if (TF == ARMII::MO_PLT)
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O << "(PLT)";
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break;
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}
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case MachineOperand::MO_ExternalSymbol: {
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O << *GetExternalSymbolSymbol(MO.getSymbolName());
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if (TF == ARMII::MO_PLT)
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O << "(PLT)";
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break;
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}
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case MachineOperand::MO_ConstantPoolIndex:
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O << *GetCPISymbol(MO.getIndex());
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break;
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case MachineOperand::MO_JumpTableIndex:
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O << *GetJTISymbol(MO.getIndex());
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break;
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}
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}
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//===--------------------------------------------------------------------===//
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MCSymbol *ARMAsmPrinter::
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GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
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const MachineBasicBlock *MBB) const {
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SmallString<60> Name;
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raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
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<< getFunctionNumber() << '_' << uid << '_' << uid2
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<< "_set_" << MBB->getNumber();
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return OutContext.GetOrCreateSymbol(Name.str());
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}
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MCSymbol *ARMAsmPrinter::
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GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const {
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SmallString<60> Name;
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raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "JTI"
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<< getFunctionNumber() << '_' << uid << '_' << uid2;
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return OutContext.GetOrCreateSymbol(Name.str());
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}
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MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel(void) const {
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SmallString<60> Name;
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raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "SJLJEH"
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<< getFunctionNumber();
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return OutContext.GetOrCreateSymbol(Name.str());
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}
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bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
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unsigned AsmVariant, const char *ExtraCode,
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raw_ostream &O) {
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// Does this asm operand have a single letter operand modifier?
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if (ExtraCode && ExtraCode[0]) {
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if (ExtraCode[1] != 0) return true; // Unknown modifier.
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switch (ExtraCode[0]) {
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default: return true; // Unknown modifier.
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case 'a': // Print as a memory address.
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if (MI->getOperand(OpNum).isReg()) {
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O << "["
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<< ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg())
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<< "]";
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return false;
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}
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// Fallthrough
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case 'c': // Don't print "#" before an immediate operand.
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if (!MI->getOperand(OpNum).isImm())
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return true;
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O << MI->getOperand(OpNum).getImm();
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return false;
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case 'P': // Print a VFP double precision register.
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case 'q': // Print a NEON quad precision register.
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printOperand(MI, OpNum, O);
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return false;
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case 'Q':
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case 'R':
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case 'H':
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// These modifiers are not yet supported.
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return true;
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}
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}
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printOperand(MI, OpNum, O);
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return false;
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}
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bool ARMAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
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unsigned OpNum, unsigned AsmVariant,
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const char *ExtraCode,
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raw_ostream &O) {
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if (ExtraCode && ExtraCode[0])
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return true; // Unknown modifier.
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const MachineOperand &MO = MI->getOperand(OpNum);
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assert(MO.isReg() && "unexpected inline asm memory operand");
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O << "[" << ARMInstPrinter::getRegisterName(MO.getReg()) << "]";
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return false;
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}
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void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
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if (Subtarget->isTargetDarwin()) {
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Reloc::Model RelocM = TM.getRelocationModel();
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if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) {
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// Declare all the text sections up front (before the DWARF sections
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// emitted by AsmPrinter::doInitialization) so the assembler will keep
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// them together at the beginning of the object file. This helps
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// avoid out-of-range branches that are due a fundamental limitation of
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// the way symbol offsets are encoded with the current Darwin ARM
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// relocations.
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const TargetLoweringObjectFileMachO &TLOFMacho =
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static_cast<const TargetLoweringObjectFileMachO &>(
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getObjFileLowering());
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OutStreamer.SwitchSection(TLOFMacho.getTextSection());
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OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
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OutStreamer.SwitchSection(TLOFMacho.getConstTextCoalSection());
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if (RelocM == Reloc::DynamicNoPIC) {
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const MCSection *sect =
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OutContext.getMachOSection("__TEXT", "__symbol_stub4",
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MCSectionMachO::S_SYMBOL_STUBS,
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12, SectionKind::getText());
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OutStreamer.SwitchSection(sect);
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} else {
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const MCSection *sect =
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OutContext.getMachOSection("__TEXT", "__picsymbolstub4",
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MCSectionMachO::S_SYMBOL_STUBS,
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16, SectionKind::getText());
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OutStreamer.SwitchSection(sect);
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}
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const MCSection *StaticInitSect =
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OutContext.getMachOSection("__TEXT", "__StaticInit",
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MCSectionMachO::S_REGULAR |
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MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
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SectionKind::getText());
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OutStreamer.SwitchSection(StaticInitSect);
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}
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}
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// Use unified assembler syntax.
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OutStreamer.EmitAssemblerFlag(MCAF_SyntaxUnified);
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// Emit ARM Build Attributes
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if (Subtarget->isTargetELF()) {
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emitAttributes();
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}
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}
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void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
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if (Subtarget->isTargetDarwin()) {
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// All darwin targets use mach-o.
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const TargetLoweringObjectFileMachO &TLOFMacho =
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static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
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MachineModuleInfoMachO &MMIMacho =
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MMI->getObjFileInfo<MachineModuleInfoMachO>();
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// Output non-lazy-pointers for external and common global variables.
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MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
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if (!Stubs.empty()) {
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// Switch with ".non_lazy_symbol_pointer" directive.
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OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
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EmitAlignment(2);
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for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
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// L_foo$stub:
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OutStreamer.EmitLabel(Stubs[i].first);
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// .indirect_symbol _foo
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MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
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OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol);
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if (MCSym.getInt())
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// External to current translation unit.
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OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
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else
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// Internal to current translation unit.
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//
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// When we place the LSDA into the TEXT section, the type info
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// pointers need to be indirect and pc-rel. We accomplish this by
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// using NLPs; however, sometimes the types are local to the file.
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// We need to fill in the value for the NLP in those cases.
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OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
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OutContext),
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4/*size*/, 0/*addrspace*/);
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}
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Stubs.clear();
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OutStreamer.AddBlankLine();
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}
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Stubs = MMIMacho.GetHiddenGVStubList();
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if (!Stubs.empty()) {
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OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
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EmitAlignment(2);
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for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
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// L_foo$stub:
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OutStreamer.EmitLabel(Stubs[i].first);
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// .long _foo
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OutStreamer.EmitValue(MCSymbolRefExpr::
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Create(Stubs[i].second.getPointer(),
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OutContext),
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4/*size*/, 0/*addrspace*/);
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}
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Stubs.clear();
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OutStreamer.AddBlankLine();
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}
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// Funny Darwin hack: This flag tells the linker that no global symbols
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// contain code that falls through to other global symbols (e.g. the obvious
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// implementation of multiple entry points). If this doesn't occur, the
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// linker can safely perform dead code stripping. Since LLVM never
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// generates code that does this, it is always safe to set.
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OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
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}
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}
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//===----------------------------------------------------------------------===//
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// Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
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// FIXME:
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// The following seem like one-off assembler flags, but they actually need
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// to appear in the .ARM.attributes section in ELF.
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// Instead of subclassing the MCELFStreamer, we do the work here.
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void ARMAsmPrinter::emitAttributes() {
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emitARMAttributeSection();
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/* GAS expect .fpu to be emitted, regardless of VFP build attribute */
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bool emitFPU = false;
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AttributeEmitter *AttrEmitter;
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if (OutStreamer.hasRawTextSupport()) {
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AttrEmitter = new AsmAttributeEmitter(OutStreamer);
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emitFPU = true;
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} else {
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MCObjectStreamer &O = static_cast<MCObjectStreamer&>(OutStreamer);
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AttrEmitter = new ObjectAttributeEmitter(O);
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}
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AttrEmitter->MaybeSwitchVendor("aeabi");
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std::string CPUString = Subtarget->getCPUString();
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if (CPUString == "cortex-a8" ||
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Subtarget->isCortexA8()) {
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AttrEmitter->EmitTextAttribute(ARMBuildAttrs::CPU_name, "cortex-a8");
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v7);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch_profile,
|
|
ARMBuildAttrs::ApplicationProfile);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
|
|
ARMBuildAttrs::Allowed);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
|
|
ARMBuildAttrs::AllowThumb32);
|
|
// Fixme: figure out when this is emitted.
|
|
//AttrEmitter->EmitAttribute(ARMBuildAttrs::WMMX_arch,
|
|
// ARMBuildAttrs::AllowWMMXv1);
|
|
//
|
|
|
|
/// ADD additional Else-cases here!
|
|
} else if (CPUString == "generic") {
|
|
// FIXME: Why these defaults?
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v4T);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
|
|
ARMBuildAttrs::Allowed);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
|
|
ARMBuildAttrs::Allowed);
|
|
}
|
|
|
|
if (Subtarget->hasNEON() && emitFPU) {
|
|
/* NEON is not exactly a VFP architecture, but GAS emit one of
|
|
* neon/vfpv3/vfpv2 for .fpu parameters */
|
|
AttrEmitter->EmitTextAttribute(ARMBuildAttrs::Advanced_SIMD_arch, "neon");
|
|
/* If emitted for NEON, omit from VFP below, since you can have both
|
|
* NEON and VFP in build attributes but only one .fpu */
|
|
emitFPU = false;
|
|
}
|
|
|
|
/* VFPv3 + .fpu */
|
|
if (Subtarget->hasVFP3()) {
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
|
|
ARMBuildAttrs::AllowFPv3A);
|
|
if (emitFPU)
|
|
AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv3");
|
|
|
|
/* VFPv2 + .fpu */
|
|
} else if (Subtarget->hasVFP2()) {
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
|
|
ARMBuildAttrs::AllowFPv2);
|
|
if (emitFPU)
|
|
AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv2");
|
|
}
|
|
|
|
/* TODO: ARMBuildAttrs::Allowed is not completely accurate,
|
|
* since NEON can have 1 (allowed) or 2 (fused MAC operations) */
|
|
if (Subtarget->hasNEON()) {
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
|
|
ARMBuildAttrs::Allowed);
|
|
}
|
|
|
|
// Signal various FP modes.
|
|
if (!UnsafeFPMath) {
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_denormal,
|
|
ARMBuildAttrs::Allowed);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
|
|
ARMBuildAttrs::Allowed);
|
|
}
|
|
|
|
if (NoInfsFPMath && NoNaNsFPMath)
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
|
|
ARMBuildAttrs::Allowed);
|
|
else
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
|
|
ARMBuildAttrs::AllowIEE754);
|
|
|
|
// FIXME: add more flags to ARMBuildAttrs.h
|
|
// 8-bytes alignment stuff.
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
|
|
|
|
// Hard float. Use both S and D registers and conform to AAPCS-VFP.
|
|
if (Subtarget->isAAPCS_ABI() && FloatABIType == FloatABI::Hard) {
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_HardFP_use, 3);
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_VFP_args, 1);
|
|
}
|
|
// FIXME: Should we signal R9 usage?
|
|
|
|
if (Subtarget->hasDivide())
|
|
AttrEmitter->EmitAttribute(ARMBuildAttrs::DIV_use, 1);
|
|
|
|
AttrEmitter->Finish();
|
|
delete AttrEmitter;
|
|
}
|
|
|
|
void ARMAsmPrinter::emitARMAttributeSection() {
|
|
// <format-version>
|
|
// [ <section-length> "vendor-name"
|
|
// [ <file-tag> <size> <attribute>*
|
|
// | <section-tag> <size> <section-number>* 0 <attribute>*
|
|
// | <symbol-tag> <size> <symbol-number>* 0 <attribute>*
|
|
// ]+
|
|
// ]*
|
|
|
|
if (OutStreamer.hasRawTextSupport())
|
|
return;
|
|
|
|
const ARMElfTargetObjectFile &TLOFELF =
|
|
static_cast<const ARMElfTargetObjectFile &>
|
|
(getObjFileLowering());
|
|
|
|
OutStreamer.SwitchSection(TLOFELF.getAttributesSection());
|
|
|
|
// Format version
|
|
OutStreamer.EmitIntValue(0x41, 1);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
|
|
unsigned LabelId, MCContext &Ctx) {
|
|
|
|
MCSymbol *Label = Ctx.GetOrCreateSymbol(Twine(Prefix)
|
|
+ "PC" + Twine(FunctionNumber) + "_" + Twine(LabelId));
|
|
return Label;
|
|
}
|
|
|
|
static MCSymbolRefExpr::VariantKind
|
|
getModifierVariantKind(ARMCP::ARMCPModifier Modifier) {
|
|
switch (Modifier) {
|
|
default: llvm_unreachable("Unknown modifier!");
|
|
case ARMCP::no_modifier: return MCSymbolRefExpr::VK_None;
|
|
case ARMCP::TLSGD: return MCSymbolRefExpr::VK_ARM_TLSGD;
|
|
case ARMCP::TPOFF: return MCSymbolRefExpr::VK_ARM_TPOFF;
|
|
case ARMCP::GOTTPOFF: return MCSymbolRefExpr::VK_ARM_GOTTPOFF;
|
|
case ARMCP::GOT: return MCSymbolRefExpr::VK_ARM_GOT;
|
|
case ARMCP::GOTOFF: return MCSymbolRefExpr::VK_ARM_GOTOFF;
|
|
}
|
|
return MCSymbolRefExpr::VK_None;
|
|
}
|
|
|
|
MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV) {
|
|
bool isIndirect = Subtarget->isTargetDarwin() &&
|
|
Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
|
|
if (!isIndirect)
|
|
return Mang->getSymbol(GV);
|
|
|
|
// FIXME: Remove this when Darwin transition to @GOT like syntax.
|
|
MCSymbol *MCSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
|
|
MachineModuleInfoMachO &MMIMachO =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>();
|
|
MachineModuleInfoImpl::StubValueTy &StubSym =
|
|
GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) :
|
|
MMIMachO.getGVStubEntry(MCSym);
|
|
if (StubSym.getPointer() == 0)
|
|
StubSym = MachineModuleInfoImpl::
|
|
StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
|
|
return MCSym;
|
|
}
|
|
|
|
void ARMAsmPrinter::
|
|
EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
|
|
int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
|
|
|
|
ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
|
|
|
|
MCSymbol *MCSym;
|
|
if (ACPV->isLSDA()) {
|
|
SmallString<128> Str;
|
|
raw_svector_ostream OS(Str);
|
|
OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
|
|
MCSym = OutContext.GetOrCreateSymbol(OS.str());
|
|
} else if (ACPV->isBlockAddress()) {
|
|
MCSym = GetBlockAddressSymbol(ACPV->getBlockAddress());
|
|
} else if (ACPV->isGlobalValue()) {
|
|
const GlobalValue *GV = ACPV->getGV();
|
|
MCSym = GetARMGVSymbol(GV);
|
|
} else {
|
|
assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
|
|
MCSym = GetExternalSymbolSymbol(ACPV->getSymbol());
|
|
}
|
|
|
|
// Create an MCSymbol for the reference.
|
|
const MCExpr *Expr =
|
|
MCSymbolRefExpr::Create(MCSym, getModifierVariantKind(ACPV->getModifier()),
|
|
OutContext);
|
|
|
|
if (ACPV->getPCAdjustment()) {
|
|
MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
|
|
getFunctionNumber(),
|
|
ACPV->getLabelId(),
|
|
OutContext);
|
|
const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
|
|
PCRelExpr =
|
|
MCBinaryExpr::CreateAdd(PCRelExpr,
|
|
MCConstantExpr::Create(ACPV->getPCAdjustment(),
|
|
OutContext),
|
|
OutContext);
|
|
if (ACPV->mustAddCurrentAddress()) {
|
|
// We want "(<expr> - .)", but MC doesn't have a concept of the '.'
|
|
// label, so just emit a local label end reference that instead.
|
|
MCSymbol *DotSym = OutContext.CreateTempSymbol();
|
|
OutStreamer.EmitLabel(DotSym);
|
|
const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
|
|
PCRelExpr = MCBinaryExpr::CreateSub(PCRelExpr, DotExpr, OutContext);
|
|
}
|
|
Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
|
|
}
|
|
OutStreamer.EmitValue(Expr, Size);
|
|
}
|
|
|
|
void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
|
|
unsigned Opcode = MI->getOpcode();
|
|
int OpNum = 1;
|
|
if (Opcode == ARM::BR_JTadd)
|
|
OpNum = 2;
|
|
else if (Opcode == ARM::BR_JTm)
|
|
OpNum = 3;
|
|
|
|
const MachineOperand &MO1 = MI->getOperand(OpNum);
|
|
const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
|
|
unsigned JTI = MO1.getIndex();
|
|
|
|
// Emit a label for the jump table.
|
|
MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
|
|
OutStreamer.EmitLabel(JTISymbol);
|
|
|
|
// Emit each entry of the table.
|
|
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
|
|
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
|
|
const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
|
|
|
|
for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
|
|
MachineBasicBlock *MBB = JTBBs[i];
|
|
// Construct an MCExpr for the entry. We want a value of the form:
|
|
// (BasicBlockAddr - TableBeginAddr)
|
|
//
|
|
// For example, a table with entries jumping to basic blocks BB0 and BB1
|
|
// would look like:
|
|
// LJTI_0_0:
|
|
// .word (LBB0 - LJTI_0_0)
|
|
// .word (LBB1 - LJTI_0_0)
|
|
const MCExpr *Expr = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
|
|
|
|
if (TM.getRelocationModel() == Reloc::PIC_)
|
|
Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
|
|
OutContext),
|
|
OutContext);
|
|
OutStreamer.EmitValue(Expr, 4);
|
|
}
|
|
}
|
|
|
|
void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
|
|
unsigned Opcode = MI->getOpcode();
|
|
int OpNum = (Opcode == ARM::t2BR_JT) ? 2 : 1;
|
|
const MachineOperand &MO1 = MI->getOperand(OpNum);
|
|
const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
|
|
unsigned JTI = MO1.getIndex();
|
|
|
|
// Emit a label for the jump table.
|
|
MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
|
|
OutStreamer.EmitLabel(JTISymbol);
|
|
|
|
// Emit each entry of the table.
|
|
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
|
|
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
|
|
const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
|
|
unsigned OffsetWidth = 4;
|
|
if (MI->getOpcode() == ARM::t2TBB_JT)
|
|
OffsetWidth = 1;
|
|
else if (MI->getOpcode() == ARM::t2TBH_JT)
|
|
OffsetWidth = 2;
|
|
|
|
for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
|
|
MachineBasicBlock *MBB = JTBBs[i];
|
|
const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(),
|
|
OutContext);
|
|
// If this isn't a TBB or TBH, the entries are direct branch instructions.
|
|
if (OffsetWidth == 4) {
|
|
MCInst BrInst;
|
|
BrInst.setOpcode(ARM::t2B);
|
|
BrInst.addOperand(MCOperand::CreateExpr(MBBSymbolExpr));
|
|
OutStreamer.EmitInstruction(BrInst);
|
|
continue;
|
|
}
|
|
// Otherwise it's an offset from the dispatch instruction. Construct an
|
|
// MCExpr for the entry. We want a value of the form:
|
|
// (BasicBlockAddr - TableBeginAddr) / 2
|
|
//
|
|
// For example, a TBB table with entries jumping to basic blocks BB0 and BB1
|
|
// would look like:
|
|
// LJTI_0_0:
|
|
// .byte (LBB0 - LJTI_0_0) / 2
|
|
// .byte (LBB1 - LJTI_0_0) / 2
|
|
const MCExpr *Expr =
|
|
MCBinaryExpr::CreateSub(MBBSymbolExpr,
|
|
MCSymbolRefExpr::Create(JTISymbol, OutContext),
|
|
OutContext);
|
|
Expr = MCBinaryExpr::CreateDiv(Expr, MCConstantExpr::Create(2, OutContext),
|
|
OutContext);
|
|
OutStreamer.EmitValue(Expr, OffsetWidth);
|
|
}
|
|
}
|
|
|
|
void ARMAsmPrinter::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);
|
|
}
|
|
|
|
static void populateADROperands(MCInst &Inst, unsigned Dest,
|
|
const MCSymbol *Label,
|
|
unsigned pred, unsigned ccreg,
|
|
MCContext &Ctx) {
|
|
const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, Ctx);
|
|
Inst.addOperand(MCOperand::CreateReg(Dest));
|
|
Inst.addOperand(MCOperand::CreateExpr(SymbolExpr));
|
|
// Add predicate operands.
|
|
Inst.addOperand(MCOperand::CreateImm(pred));
|
|
Inst.addOperand(MCOperand::CreateReg(ccreg));
|
|
}
|
|
|
|
void ARMAsmPrinter::EmitPatchedInstruction(const MachineInstr *MI,
|
|
unsigned Opcode) {
|
|
MCInst TmpInst;
|
|
|
|
// Emit the instruction as usual, just patch the opcode.
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
|
|
TmpInst.setOpcode(Opcode);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
|
|
void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
|
|
assert(MI->getFlag(MachineInstr::FrameSetup) &&
|
|
"Only instruction which are involved into frame setup code are allowed");
|
|
|
|
const MachineFunction &MF = *MI->getParent()->getParent();
|
|
const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
|
|
const ARMFunctionInfo &AFI = *MF.getInfo<ARMFunctionInfo>();
|
|
|
|
unsigned FramePtr = RegInfo->getFrameRegister(MF);
|
|
unsigned Opc = MI->getOpcode();
|
|
unsigned SrcReg, DstReg;
|
|
|
|
if (Opc == ARM::tPUSH || Opc == ARM::tLDRpci) {
|
|
// Two special cases:
|
|
// 1) tPUSH does not have src/dst regs.
|
|
// 2) for Thumb1 code we sometimes materialize the constant via constpool
|
|
// load. Yes, this is pretty fragile, but for now I don't see better
|
|
// way... :(
|
|
SrcReg = DstReg = ARM::SP;
|
|
} else {
|
|
SrcReg = MI->getOperand(1).getReg();
|
|
DstReg = MI->getOperand(0).getReg();
|
|
}
|
|
|
|
// Try to figure out the unwinding opcode out of src / dst regs.
|
|
if (MI->getDesc().mayStore()) {
|
|
// Register saves.
|
|
assert(DstReg == ARM::SP &&
|
|
"Only stack pointer as a destination reg is supported");
|
|
|
|
SmallVector<unsigned, 4> RegList;
|
|
// Skip src & dst reg, and pred ops.
|
|
unsigned StartOp = 2 + 2;
|
|
// Use all the operands.
|
|
unsigned NumOffset = 0;
|
|
|
|
switch (Opc) {
|
|
default:
|
|
MI->dump();
|
|
assert(0 && "Unsupported opcode for unwinding information");
|
|
case ARM::tPUSH:
|
|
// Special case here: no src & dst reg, but two extra imp ops.
|
|
StartOp = 2; NumOffset = 2;
|
|
case ARM::STMDB_UPD:
|
|
case ARM::t2STMDB_UPD:
|
|
case ARM::VSTMDDB_UPD:
|
|
assert(SrcReg == ARM::SP &&
|
|
"Only stack pointer as a source reg is supported");
|
|
for (unsigned i = StartOp, NumOps = MI->getNumOperands() - NumOffset;
|
|
i != NumOps; ++i)
|
|
RegList.push_back(MI->getOperand(i).getReg());
|
|
break;
|
|
case ARM::STR_PRE:
|
|
assert(MI->getOperand(2).getReg() == ARM::SP &&
|
|
"Only stack pointer as a source reg is supported");
|
|
RegList.push_back(SrcReg);
|
|
break;
|
|
}
|
|
OutStreamer.EmitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
|
|
} else {
|
|
// Changes of stack / frame pointer.
|
|
if (SrcReg == ARM::SP) {
|
|
int64_t Offset = 0;
|
|
switch (Opc) {
|
|
default:
|
|
MI->dump();
|
|
assert(0 && "Unsupported opcode for unwinding information");
|
|
case ARM::MOVr:
|
|
case ARM::tMOVgpr2gpr:
|
|
case ARM::tMOVgpr2tgpr:
|
|
Offset = 0;
|
|
break;
|
|
case ARM::ADDri:
|
|
Offset = -MI->getOperand(2).getImm();
|
|
break;
|
|
case ARM::SUBri:
|
|
case ARM::t2SUBrSPi:
|
|
Offset = MI->getOperand(2).getImm();
|
|
break;
|
|
case ARM::tSUBspi:
|
|
Offset = MI->getOperand(2).getImm()*4;
|
|
break;
|
|
case ARM::tADDspi:
|
|
case ARM::tADDrSPi:
|
|
Offset = -MI->getOperand(2).getImm()*4;
|
|
break;
|
|
case ARM::tLDRpci: {
|
|
// Grab the constpool index and check, whether it corresponds to
|
|
// original or cloned constpool entry.
|
|
unsigned CPI = MI->getOperand(1).getIndex();
|
|
const MachineConstantPool *MCP = MF.getConstantPool();
|
|
if (CPI >= MCP->getConstants().size())
|
|
CPI = AFI.getOriginalCPIdx(CPI);
|
|
assert(CPI != -1U && "Invalid constpool index");
|
|
|
|
// Derive the actual offset.
|
|
const MachineConstantPoolEntry &CPE = MCP->getConstants()[CPI];
|
|
assert(!CPE.isMachineConstantPoolEntry() && "Invalid constpool entry");
|
|
// FIXME: Check for user, it should be "add" instruction!
|
|
Offset = -cast<ConstantInt>(CPE.Val.ConstVal)->getSExtValue();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (DstReg == FramePtr && FramePtr != ARM::SP)
|
|
// Set-up of the frame pointer. Positive values correspond to "add"
|
|
// instruction.
|
|
OutStreamer.EmitSetFP(FramePtr, ARM::SP, -Offset);
|
|
else if (DstReg == ARM::SP) {
|
|
// Change of SP by an offset. Positive values correspond to "sub"
|
|
// instruction.
|
|
OutStreamer.EmitPad(Offset);
|
|
} else {
|
|
MI->dump();
|
|
assert(0 && "Unsupported opcode for unwinding information");
|
|
}
|
|
} else if (DstReg == ARM::SP) {
|
|
// FIXME: .movsp goes here
|
|
MI->dump();
|
|
assert(0 && "Unsupported opcode for unwinding information");
|
|
}
|
|
else {
|
|
MI->dump();
|
|
assert(0 && "Unsupported opcode for unwinding information");
|
|
}
|
|
}
|
|
}
|
|
|
|
extern cl::opt<bool> EnableARMEHABI;
|
|
|
|
void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
|
|
unsigned Opc = MI->getOpcode();
|
|
switch (Opc) {
|
|
default: break;
|
|
case ARM::B: {
|
|
// B is just a Bcc with an 'always' predicate.
|
|
MCInst TmpInst;
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
|
|
TmpInst.setOpcode(ARM::Bcc);
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::LDMIA_RET: {
|
|
// LDMIA_RET is just a normal LDMIA_UPD instruction that targets PC and as
|
|
// such has additional code-gen properties and scheduling information.
|
|
// To emit it, we just construct as normal and set the opcode to LDMIA_UPD.
|
|
MCInst TmpInst;
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
|
|
TmpInst.setOpcode(ARM::LDMIA_UPD);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::t2ADDrSPi:
|
|
case ARM::t2ADDrSPi12:
|
|
case ARM::t2SUBrSPi:
|
|
case ARM::t2SUBrSPi12:
|
|
assert ((MI->getOperand(1).getReg() == ARM::SP) &&
|
|
"Unexpected source register!");
|
|
break;
|
|
|
|
case ARM::t2MOVi32imm: assert(0 && "Should be lowered by thumb2it pass");
|
|
case ARM::DBG_VALUE: {
|
|
if (isVerbose() && OutStreamer.hasRawTextSupport()) {
|
|
SmallString<128> TmpStr;
|
|
raw_svector_ostream OS(TmpStr);
|
|
PrintDebugValueComment(MI, OS);
|
|
OutStreamer.EmitRawText(StringRef(OS.str()));
|
|
}
|
|
return;
|
|
}
|
|
case ARM::tBfar: {
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tBL);
|
|
TmpInst.addOperand(MCOperand::CreateExpr(MCSymbolRefExpr::Create(
|
|
MI->getOperand(0).getMBB()->getSymbol(), OutContext)));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::LEApcrel:
|
|
case ARM::tLEApcrel:
|
|
case ARM::t2LEApcrel: {
|
|
// FIXME: Need to also handle globals and externals
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrel ? ARM::t2ADR
|
|
: (MI->getOpcode() == ARM::tLEApcrel ? ARM::tADR
|
|
: ARM::ADR));
|
|
populateADROperands(TmpInst, MI->getOperand(0).getReg(),
|
|
GetCPISymbol(MI->getOperand(1).getIndex()),
|
|
MI->getOperand(2).getImm(), MI->getOperand(3).getReg(),
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::LEApcrelJT:
|
|
case ARM::tLEApcrelJT:
|
|
case ARM::t2LEApcrelJT: {
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrelJT ? ARM::t2ADR
|
|
: (MI->getOpcode() == ARM::tLEApcrelJT ? ARM::tADR
|
|
: ARM::ADR));
|
|
populateADROperands(TmpInst, MI->getOperand(0).getReg(),
|
|
GetARMJTIPICJumpTableLabel2(MI->getOperand(1).getIndex(),
|
|
MI->getOperand(2).getImm()),
|
|
MI->getOperand(3).getImm(), MI->getOperand(4).getReg(),
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::MOVPCRX: {
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::MOVr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
// Darwin call instructions are just normal call instructions with different
|
|
// clobber semantics (they clobber R9).
|
|
case ARM::BLr9:
|
|
case ARM::BLr9_pred:
|
|
case ARM::BLXr9:
|
|
case ARM::BLXr9_pred: {
|
|
unsigned newOpc;
|
|
switch (Opc) {
|
|
default: assert(0);
|
|
case ARM::BLr9: newOpc = ARM::BL; break;
|
|
case ARM::BLr9_pred: newOpc = ARM::BL_pred; break;
|
|
case ARM::BLXr9: newOpc = ARM::BLX; break;
|
|
case ARM::BLXr9_pred: newOpc = ARM::BLX_pred; break;
|
|
}
|
|
MCInst TmpInst;
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
|
|
TmpInst.setOpcode(newOpc);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::BXr9_CALL:
|
|
case ARM::BX_CALL: {
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::MOVr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::BX);
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
return;
|
|
}
|
|
case ARM::BMOVPCRXr9_CALL:
|
|
case ARM::BMOVPCRX_CALL: {
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::MOVr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::MOVr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
return;
|
|
}
|
|
case ARM::MOVi16_ga_pcrel:
|
|
case ARM::t2MOVi16_ga_pcrel: {
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(Opc == ARM::MOVi16_ga_pcrel? ARM::MOVi16 : ARM::t2MOVi16);
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
|
|
unsigned TF = MI->getOperand(1).getTargetFlags();
|
|
bool isPIC = TF == ARMII::MO_LO16_NONLAZY_PIC;
|
|
const GlobalValue *GV = MI->getOperand(1).getGlobal();
|
|
MCSymbol *GVSym = GetARMGVSymbol(GV);
|
|
const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
|
|
if (isPIC) {
|
|
MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
|
|
getFunctionNumber(),
|
|
MI->getOperand(2).getImm(), OutContext);
|
|
const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
|
|
unsigned PCAdj = (Opc == ARM::MOVi16_ga_pcrel) ? 8 : 4;
|
|
const MCExpr *PCRelExpr =
|
|
ARMMCExpr::CreateLower16(MCBinaryExpr::CreateSub(GVSymExpr,
|
|
MCBinaryExpr::CreateAdd(LabelSymExpr,
|
|
MCConstantExpr::Create(PCAdj, OutContext),
|
|
OutContext), OutContext), OutContext);
|
|
TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
|
|
} else {
|
|
const MCExpr *RefExpr= ARMMCExpr::CreateLower16(GVSymExpr, OutContext);
|
|
TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
|
|
}
|
|
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::MOVTi16_ga_pcrel:
|
|
case ARM::t2MOVTi16_ga_pcrel: {
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(Opc == ARM::MOVTi16_ga_pcrel
|
|
? ARM::MOVTi16 : ARM::t2MOVTi16);
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
|
|
|
|
unsigned TF = MI->getOperand(2).getTargetFlags();
|
|
bool isPIC = TF == ARMII::MO_HI16_NONLAZY_PIC;
|
|
const GlobalValue *GV = MI->getOperand(2).getGlobal();
|
|
MCSymbol *GVSym = GetARMGVSymbol(GV);
|
|
const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
|
|
if (isPIC) {
|
|
MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
|
|
getFunctionNumber(),
|
|
MI->getOperand(3).getImm(), OutContext);
|
|
const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
|
|
unsigned PCAdj = (Opc == ARM::MOVTi16_ga_pcrel) ? 8 : 4;
|
|
const MCExpr *PCRelExpr =
|
|
ARMMCExpr::CreateUpper16(MCBinaryExpr::CreateSub(GVSymExpr,
|
|
MCBinaryExpr::CreateAdd(LabelSymExpr,
|
|
MCConstantExpr::Create(PCAdj, OutContext),
|
|
OutContext), OutContext), OutContext);
|
|
TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
|
|
} else {
|
|
const MCExpr *RefExpr= ARMMCExpr::CreateUpper16(GVSymExpr, OutContext);
|
|
TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
|
|
}
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::tPICADD: {
|
|
// This is a pseudo op for a label + instruction sequence, which looks like:
|
|
// LPC0:
|
|
// add r0, pc
|
|
// This adds the address of LPC0 to r0.
|
|
|
|
// Emit the label.
|
|
OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
|
|
getFunctionNumber(), MI->getOperand(2).getImm(),
|
|
OutContext));
|
|
|
|
// Form and emit the add.
|
|
MCInst AddInst;
|
|
AddInst.setOpcode(ARM::tADDhirr);
|
|
AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
// Add predicate operands.
|
|
AddInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
AddInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(AddInst);
|
|
return;
|
|
}
|
|
case ARM::PICADD: {
|
|
// This is a pseudo op for a label + instruction sequence, which looks like:
|
|
// LPC0:
|
|
// add r0, pc, r0
|
|
// This adds the address of LPC0 to r0.
|
|
|
|
// Emit the label.
|
|
OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
|
|
getFunctionNumber(), MI->getOperand(2).getImm(),
|
|
OutContext));
|
|
|
|
// Form and emit the add.
|
|
MCInst AddInst;
|
|
AddInst.setOpcode(ARM::ADDrr);
|
|
AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
|
|
// Add predicate operands.
|
|
AddInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
|
|
AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
AddInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(AddInst);
|
|
return;
|
|
}
|
|
case ARM::PICSTR:
|
|
case ARM::PICSTRB:
|
|
case ARM::PICSTRH:
|
|
case ARM::PICLDR:
|
|
case ARM::PICLDRB:
|
|
case ARM::PICLDRH:
|
|
case ARM::PICLDRSB:
|
|
case ARM::PICLDRSH: {
|
|
// This is a pseudo op for a label + instruction sequence, which looks like:
|
|
// LPC0:
|
|
// OP r0, [pc, r0]
|
|
// The LCP0 label is referenced by a constant pool entry in order to get
|
|
// a PC-relative address at the ldr instruction.
|
|
|
|
// Emit the label.
|
|
OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
|
|
getFunctionNumber(), MI->getOperand(2).getImm(),
|
|
OutContext));
|
|
|
|
// Form and emit the load
|
|
unsigned Opcode;
|
|
switch (MI->getOpcode()) {
|
|
default:
|
|
llvm_unreachable("Unexpected opcode!");
|
|
case ARM::PICSTR: Opcode = ARM::STRrs; break;
|
|
case ARM::PICSTRB: Opcode = ARM::STRBrs; break;
|
|
case ARM::PICSTRH: Opcode = ARM::STRH; break;
|
|
case ARM::PICLDR: Opcode = ARM::LDRrs; break;
|
|
case ARM::PICLDRB: Opcode = ARM::LDRBrs; break;
|
|
case ARM::PICLDRH: Opcode = ARM::LDRH; break;
|
|
case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
|
|
case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
|
|
}
|
|
MCInst LdStInst;
|
|
LdStInst.setOpcode(Opcode);
|
|
LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
LdStInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
|
|
LdStInst.addOperand(MCOperand::CreateImm(0));
|
|
// Add predicate operands.
|
|
LdStInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
|
|
LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
|
|
OutStreamer.EmitInstruction(LdStInst);
|
|
|
|
return;
|
|
}
|
|
case ARM::CONSTPOOL_ENTRY: {
|
|
/// CONSTPOOL_ENTRY - This instruction represents a floating constant pool
|
|
/// in the function. The first operand is the ID# for this instruction, the
|
|
/// second is the index into the MachineConstantPool that this is, the third
|
|
/// is the size in bytes of this constant pool entry.
|
|
unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
|
|
unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
|
|
|
|
EmitAlignment(2);
|
|
OutStreamer.EmitLabel(GetCPISymbol(LabelId));
|
|
|
|
const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
|
|
if (MCPE.isMachineConstantPoolEntry())
|
|
EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
|
|
else
|
|
EmitGlobalConstant(MCPE.Val.ConstVal);
|
|
|
|
return;
|
|
}
|
|
case ARM::t2BR_JT: {
|
|
// Lower and emit the instruction itself, then the jump table following it.
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tMOVgpr2gpr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
// Output the data for the jump table itself
|
|
EmitJump2Table(MI);
|
|
return;
|
|
}
|
|
case ARM::t2TBB_JT: {
|
|
// Lower and emit the instruction itself, then the jump table following it.
|
|
MCInst TmpInst;
|
|
|
|
TmpInst.setOpcode(ARM::t2TBB);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
// Output the data for the jump table itself
|
|
EmitJump2Table(MI);
|
|
// Make sure the next instruction is 2-byte aligned.
|
|
EmitAlignment(1);
|
|
return;
|
|
}
|
|
case ARM::t2TBH_JT: {
|
|
// Lower and emit the instruction itself, then the jump table following it.
|
|
MCInst TmpInst;
|
|
|
|
TmpInst.setOpcode(ARM::t2TBH);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
// Output the data for the jump table itself
|
|
EmitJump2Table(MI);
|
|
return;
|
|
}
|
|
case ARM::tBR_JTr:
|
|
case ARM::BR_JTr: {
|
|
// Lower and emit the instruction itself, then the jump table following it.
|
|
// mov pc, target
|
|
MCInst TmpInst;
|
|
unsigned Opc = MI->getOpcode() == ARM::BR_JTr ?
|
|
ARM::MOVr : ARM::tMOVgpr2gpr;
|
|
TmpInst.setOpcode(Opc);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
if (Opc == ARM::MOVr)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
|
|
// Make sure the Thumb jump table is 4-byte aligned.
|
|
if (Opc == ARM::tMOVgpr2gpr)
|
|
EmitAlignment(2);
|
|
|
|
// Output the data for the jump table itself
|
|
EmitJumpTable(MI);
|
|
return;
|
|
}
|
|
case ARM::BR_JTm: {
|
|
// Lower and emit the instruction itself, then the jump table following it.
|
|
// ldr pc, target
|
|
MCInst TmpInst;
|
|
if (MI->getOperand(1).getReg() == 0) {
|
|
// literal offset
|
|
TmpInst.setOpcode(ARM::LDRi12);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
|
|
} else {
|
|
TmpInst.setOpcode(ARM::LDRrs);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateImm(0));
|
|
}
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
|
|
// Output the data for the jump table itself
|
|
EmitJumpTable(MI);
|
|
return;
|
|
}
|
|
case ARM::BR_JTadd: {
|
|
// Lower and emit the instruction itself, then the jump table following it.
|
|
// add pc, target, idx
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::ADDrr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Add 's' bit operand (always reg0 for this)
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
|
|
// Output the data for the jump table itself
|
|
EmitJumpTable(MI);
|
|
return;
|
|
}
|
|
case ARM::TRAP: {
|
|
// Non-Darwin binutils don't yet support the "trap" mnemonic.
|
|
// FIXME: Remove this special case when they do.
|
|
if (!Subtarget->isTargetDarwin()) {
|
|
//.long 0xe7ffdefe @ trap
|
|
uint32_t Val = 0xe7ffdefeUL;
|
|
OutStreamer.AddComment("trap");
|
|
OutStreamer.EmitIntValue(Val, 4);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
case ARM::tTRAP: {
|
|
// Non-Darwin binutils don't yet support the "trap" mnemonic.
|
|
// FIXME: Remove this special case when they do.
|
|
if (!Subtarget->isTargetDarwin()) {
|
|
//.short 57086 @ trap
|
|
uint16_t Val = 0xdefe;
|
|
OutStreamer.AddComment("trap");
|
|
OutStreamer.EmitIntValue(Val, 2);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
case ARM::t2Int_eh_sjlj_setjmp:
|
|
case ARM::t2Int_eh_sjlj_setjmp_nofp:
|
|
case ARM::tInt_eh_sjlj_setjmp: {
|
|
// Two incoming args: GPR:$src, GPR:$val
|
|
// mov $val, pc
|
|
// adds $val, #7
|
|
// str $val, [$src, #4]
|
|
// movs r0, #0
|
|
// b 1f
|
|
// movs r0, #1
|
|
// 1:
|
|
unsigned SrcReg = MI->getOperand(0).getReg();
|
|
unsigned ValReg = MI->getOperand(1).getReg();
|
|
MCSymbol *Label = GetARMSJLJEHLabel();
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tMOVgpr2tgpr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
// 's' bit operand
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
|
|
OutStreamer.AddComment("eh_setjmp begin");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tADDi3);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
|
|
// 's' bit operand
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
|
|
TmpInst.addOperand(MCOperand::CreateImm(7));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tSTRi);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
// The offset immediate is #4. The operand value is scaled by 4 for the
|
|
// tSTR instruction.
|
|
TmpInst.addOperand(MCOperand::CreateImm(1));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tMOVi8);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
|
|
TmpInst.addOperand(MCOperand::CreateImm(0));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, OutContext);
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tB);
|
|
TmpInst.addOperand(MCOperand::CreateExpr(SymbolExpr));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tMOVi8);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
|
|
TmpInst.addOperand(MCOperand::CreateImm(1));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.AddComment("eh_setjmp end");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
OutStreamer.EmitLabel(Label);
|
|
return;
|
|
}
|
|
|
|
case ARM::Int_eh_sjlj_setjmp_nofp:
|
|
case ARM::Int_eh_sjlj_setjmp: {
|
|
// Two incoming args: GPR:$src, GPR:$val
|
|
// add $val, pc, #8
|
|
// str $val, [$src, #+4]
|
|
// mov r0, #0
|
|
// add pc, pc, #0
|
|
// mov r0, #1
|
|
unsigned SrcReg = MI->getOperand(0).getReg();
|
|
unsigned ValReg = MI->getOperand(1).getReg();
|
|
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::ADDri);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateImm(8));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// 's' bit operand (always reg0 for this).
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.AddComment("eh_setjmp begin");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::STRi12);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
TmpInst.addOperand(MCOperand::CreateImm(4));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::MOVi);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
|
|
TmpInst.addOperand(MCOperand::CreateImm(0));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// 's' bit operand (always reg0 for this).
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::ADDri);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
|
|
TmpInst.addOperand(MCOperand::CreateImm(0));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// 's' bit operand (always reg0 for this).
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::MOVi);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
|
|
TmpInst.addOperand(MCOperand::CreateImm(1));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// 's' bit operand (always reg0 for this).
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.AddComment("eh_setjmp end");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
return;
|
|
}
|
|
case ARM::Int_eh_sjlj_longjmp: {
|
|
// ldr sp, [$src, #8]
|
|
// ldr $scratch, [$src, #4]
|
|
// ldr r7, [$src]
|
|
// bx $scratch
|
|
unsigned SrcReg = MI->getOperand(0).getReg();
|
|
unsigned ScratchReg = MI->getOperand(1).getReg();
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::LDRi12);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
TmpInst.addOperand(MCOperand::CreateImm(8));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::LDRi12);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
TmpInst.addOperand(MCOperand::CreateImm(4));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::LDRi12);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
TmpInst.addOperand(MCOperand::CreateImm(0));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::BX);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
return;
|
|
}
|
|
case ARM::tInt_eh_sjlj_longjmp: {
|
|
// ldr $scratch, [$src, #8]
|
|
// mov sp, $scratch
|
|
// ldr $scratch, [$src, #4]
|
|
// ldr r7, [$src]
|
|
// bx $scratch
|
|
unsigned SrcReg = MI->getOperand(0).getReg();
|
|
unsigned ScratchReg = MI->getOperand(1).getReg();
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tLDRi);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
// The offset immediate is #8. The operand value is scaled by 4 for the
|
|
// tLDR instruction.
|
|
TmpInst.addOperand(MCOperand::CreateImm(2));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tMOVtgpr2gpr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
|
|
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tLDRi);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
TmpInst.addOperand(MCOperand::CreateImm(1));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tLDRr);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
|
|
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
{
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(ARM::tBX_RET_vararg);
|
|
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
return;
|
|
}
|
|
// Tail jump branches are really just branch instructions with additional
|
|
// code-gen attributes. Convert them to the canonical form here.
|
|
case ARM::TAILJMPd:
|
|
case ARM::TAILJMPdND: {
|
|
MCInst TmpInst, TmpInst2;
|
|
// Lower the instruction as-is to get the operands properly converted.
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst2, *this);
|
|
TmpInst.setOpcode(ARM::Bcc);
|
|
TmpInst.addOperand(TmpInst2.getOperand(0));
|
|
// Add predicate operands.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.AddComment("TAILCALL");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::tTAILJMPd:
|
|
case ARM::tTAILJMPdND: {
|
|
MCInst TmpInst, TmpInst2;
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst2, *this);
|
|
TmpInst.setOpcode(ARM::tB);
|
|
TmpInst.addOperand(TmpInst2.getOperand(0));
|
|
OutStreamer.AddComment("TAILCALL");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case ARM::TAILJMPrND:
|
|
case ARM::tTAILJMPrND:
|
|
case ARM::TAILJMPr:
|
|
case ARM::tTAILJMPr: {
|
|
unsigned newOpc = (Opc == ARM::TAILJMPr || Opc == ARM::TAILJMPrND)
|
|
? ARM::BX : ARM::tBX;
|
|
MCInst TmpInst;
|
|
TmpInst.setOpcode(newOpc);
|
|
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
|
|
// Predicate.
|
|
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
|
|
TmpInst.addOperand(MCOperand::CreateReg(0));
|
|
OutStreamer.AddComment("TAILCALL");
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
|
|
// These are the pseudos created to comply with stricter operand restrictions
|
|
// on ARMv5. Lower them now to "normal" instructions, since all the
|
|
// restrictions are already satisfied.
|
|
case ARM::MULv5:
|
|
EmitPatchedInstruction(MI, ARM::MUL);
|
|
return;
|
|
case ARM::MLAv5:
|
|
EmitPatchedInstruction(MI, ARM::MLA);
|
|
return;
|
|
case ARM::SMULLv5:
|
|
EmitPatchedInstruction(MI, ARM::SMULL);
|
|
return;
|
|
case ARM::UMULLv5:
|
|
EmitPatchedInstruction(MI, ARM::UMULL);
|
|
return;
|
|
case ARM::SMLALv5:
|
|
EmitPatchedInstruction(MI, ARM::SMLAL);
|
|
return;
|
|
case ARM::UMLALv5:
|
|
EmitPatchedInstruction(MI, ARM::UMLAL);
|
|
return;
|
|
case ARM::UMAALv5:
|
|
EmitPatchedInstruction(MI, ARM::UMAAL);
|
|
return;
|
|
}
|
|
|
|
MCInst TmpInst;
|
|
LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
|
|
|
|
// Emit unwinding stuff for frame-related instructions
|
|
if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
|
|
EmitUnwindingInstruction(MI);
|
|
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Target Registry Stuff
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static MCInstPrinter *createARMMCInstPrinter(const Target &T,
|
|
TargetMachine &TM,
|
|
unsigned SyntaxVariant,
|
|
const MCAsmInfo &MAI) {
|
|
if (SyntaxVariant == 0)
|
|
return new ARMInstPrinter(TM, MAI);
|
|
return 0;
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeARMAsmPrinter() {
|
|
RegisterAsmPrinter<ARMAsmPrinter> X(TheARMTarget);
|
|
RegisterAsmPrinter<ARMAsmPrinter> Y(TheThumbTarget);
|
|
|
|
TargetRegistry::RegisterMCInstPrinter(TheARMTarget, createARMMCInstPrinter);
|
|
TargetRegistry::RegisterMCInstPrinter(TheThumbTarget, createARMMCInstPrinter);
|
|
}
|
|
|