#define DEBUG_TYPE "asm-printer"
#include "ARM.h"
-#include "ARMBuildAttrs.h"
+#include "ARMAsmPrinter.h"
#include "ARMAddressingModes.h"
+#include "ARMBuildAttrs.h"
+#include "ARMBaseRegisterInfo.h"
#include "ARMConstantPoolValue.h"
-#include "InstPrinter/ARMInstPrinter.h"
#include "ARMMachineFunctionInfo.h"
-#include "ARMMCInstLower.h"
+#include "ARMMCExpr.h"
#include "ARMTargetMachine.h"
+#include "ARMTargetObjectFile.h"
+#include "InstPrinter/ARMInstPrinter.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
-#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
-#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include <cctype>
using namespace llvm;
-namespace llvm {
- namespace ARM {
- enum DW_ISA {
- DW_ISA_ARM_thumb = 1,
- DW_ISA_ARM_arm = 2
- };
- }
-}
-
namespace {
- class ARMAsmPrinter : public AsmPrinter {
-
- /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
- /// make the right decision when printing asm code for different targets.
- const ARMSubtarget *Subtarget;
- /// AFI - Keep a pointer to ARMFunctionInfo for the current
- /// MachineFunction.
- ARMFunctionInfo *AFI;
+ // Per section and per symbol attributes are not supported.
+ // To implement them we would need the ability to delay this emission
+ // until the assembly file is fully parsed/generated as only then do we
+ // know the symbol and section numbers.
+ class AttributeEmitter {
+ public:
+ virtual void MaybeSwitchVendor(StringRef Vendor) = 0;
+ virtual void EmitAttribute(unsigned Attribute, unsigned Value) = 0;
+ virtual void EmitTextAttribute(unsigned Attribute, StringRef String) = 0;
+ virtual void Finish() = 0;
+ virtual ~AttributeEmitter() {}
+ };
- /// MCP - Keep a pointer to constantpool entries of the current
- /// MachineFunction.
- const MachineConstantPool *MCP;
+ class AsmAttributeEmitter : public AttributeEmitter {
+ MCStreamer &Streamer;
public:
- explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
- : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL) {
- Subtarget = &TM.getSubtarget<ARMSubtarget>();
+ AsmAttributeEmitter(MCStreamer &Streamer_) : Streamer(Streamer_) {}
+ void MaybeSwitchVendor(StringRef Vendor) { }
+
+ void EmitAttribute(unsigned Attribute, unsigned Value) {
+ Streamer.EmitRawText("\t.eabi_attribute " +
+ Twine(Attribute) + ", " + Twine(Value));
}
- virtual const char *getPassName() const {
- return "ARM Assembly Printer";
+ void EmitTextAttribute(unsigned Attribute, StringRef String) {
+ switch (Attribute) {
+ case ARMBuildAttrs::CPU_name:
+ Streamer.EmitRawText(StringRef("\t.cpu ") + LowercaseString(String));
+ break;
+ /* GAS requires .fpu to be emitted regardless of EABI attribute */
+ case ARMBuildAttrs::Advanced_SIMD_arch:
+ case ARMBuildAttrs::VFP_arch:
+ Streamer.EmitRawText(StringRef("\t.fpu ") + LowercaseString(String));
+ break;
+ default: assert(0 && "Unsupported Text attribute in ASM Mode"); break;
+ }
}
+ void Finish() { }
+ };
- void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
- const char *Modifier = 0);
+ class ObjectAttributeEmitter : public AttributeEmitter {
+ MCObjectStreamer &Streamer;
+ StringRef CurrentVendor;
+ SmallString<64> Contents;
- virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
- unsigned AsmVariant, const char *ExtraCode,
- raw_ostream &O);
- virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
- unsigned AsmVariant,
- const char *ExtraCode, raw_ostream &O);
+ public:
+ ObjectAttributeEmitter(MCObjectStreamer &Streamer_) :
+ Streamer(Streamer_), CurrentVendor("") { }
- void EmitJumpTable(const MachineInstr *MI);
- void EmitJump2Table(const MachineInstr *MI);
- virtual void EmitInstruction(const MachineInstr *MI);
- bool runOnMachineFunction(MachineFunction &F);
+ void MaybeSwitchVendor(StringRef Vendor) {
+ assert(!Vendor.empty() && "Vendor cannot be empty.");
- virtual void EmitConstantPool() {} // we emit constant pools customly!
- virtual void EmitFunctionEntryLabel();
- void EmitStartOfAsmFile(Module &M);
- void EmitEndOfAsmFile(Module &M);
+ if (CurrentVendor.empty())
+ CurrentVendor = Vendor;
+ else if (CurrentVendor == Vendor)
+ return;
+ else
+ Finish();
- private:
- // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
- void emitAttributes();
- void emitAttribute(ARMBuildAttrs::AttrType attr, int v);
+ CurrentVendor = Vendor;
- public:
- void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
-
- MachineLocation 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;
+ assert(Contents.size() == 0);
}
- virtual unsigned getISAEncoding() {
- // ARM/Darwin adds ISA to the DWARF info for each function.
- if (!Subtarget->isTargetDarwin())
- return 0;
- return Subtarget->isThumb() ?
- llvm::ARM::DW_ISA_ARM_thumb : llvm::ARM::DW_ISA_ARM_arm;
+ void EmitAttribute(unsigned Attribute, unsigned Value) {
+ // FIXME: should be ULEB
+ Contents += Attribute;
+ Contents += Value;
}
- MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
- const MachineBasicBlock *MBB) const;
- MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
+ void EmitTextAttribute(unsigned Attribute, StringRef String) {
+ Contents += Attribute;
+ Contents += UppercaseString(String);
+ Contents += 0;
+ }
- MCSymbol *GetARMSJLJEHLabel(void) const;
+ void Finish() {
+ const size_t ContentsSize = Contents.size();
- /// EmitMachineConstantPoolValue - Print a machine constantpool value to
- /// the .s file.
- virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
- SmallString<128> Str;
- raw_svector_ostream OS(Str);
- EmitMachineConstantPoolValue(MCPV, OS);
- OutStreamer.EmitRawText(OS.str());
- }
+ // Vendor size + Vendor name + '\0'
+ const size_t VendorHeaderSize = 4 + CurrentVendor.size() + 1;
- void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV,
- raw_ostream &O) {
- switch (TM.getTargetData()->getTypeAllocSize(MCPV->getType())) {
- case 1: O << MAI->getData8bitsDirective(0); break;
- case 2: O << MAI->getData16bitsDirective(0); break;
- case 4: O << MAI->getData32bitsDirective(0); break;
- default: assert(0 && "Unknown CPV size");
- }
+ // Tag + Tag Size
+ const size_t TagHeaderSize = 1 + 4;
- ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
-
- if (ACPV->isLSDA()) {
- O << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
- } else if (ACPV->isBlockAddress()) {
- O << *GetBlockAddressSymbol(ACPV->getBlockAddress());
- } else if (ACPV->isGlobalValue()) {
- const GlobalValue *GV = ACPV->getGV();
- bool isIndirect = Subtarget->isTargetDarwin() &&
- Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
- if (!isIndirect)
- O << *Mang->getSymbol(GV);
- else {
- // FIXME: Remove this when Darwin transition to @GOT like syntax.
- MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
- O << *Sym;
-
- MachineModuleInfoMachO &MMIMachO =
- MMI->getObjFileInfo<MachineModuleInfoMachO>();
- MachineModuleInfoImpl::StubValueTy &StubSym =
- GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(Sym) :
- MMIMachO.getGVStubEntry(Sym);
- if (StubSym.getPointer() == 0)
- StubSym = MachineModuleInfoImpl::
- StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
- }
- } else {
- assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
- O << *GetExternalSymbolSymbol(ACPV->getSymbol());
- }
+ Streamer.EmitIntValue(VendorHeaderSize + TagHeaderSize + ContentsSize, 4);
+ Streamer.EmitBytes(CurrentVendor, 0);
+ Streamer.EmitIntValue(0, 1); // '\0'
- if (ACPV->hasModifier()) O << "(" << ACPV->getModifier() << ")";
- if (ACPV->getPCAdjustment() != 0) {
- O << "-(" << MAI->getPrivateGlobalPrefix() << "PC"
- << getFunctionNumber() << "_" << ACPV->getLabelId()
- << "+" << (unsigned)ACPV->getPCAdjustment();
- if (ACPV->mustAddCurrentAddress())
- O << "-.";
- O << ')';
- }
+ Streamer.EmitIntValue(ARMBuildAttrs::File, 1);
+ Streamer.EmitIntValue(TagHeaderSize + ContentsSize, 4);
+
+ Streamer.EmitBytes(Contents, 0);
+
+ Contents.clear();
}
};
+
} // end of anonymous namespace
+MachineLocation ARMAsmPrinter::
+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 ARMAsmPrinter::EmitFunctionEntryLabel() {
if (AFI->isThumbFunction()) {
- OutStreamer.EmitRawText(StringRef("\t.code\t16"));
- if (!Subtarget->isTargetDarwin())
- OutStreamer.EmitRawText(StringRef("\t.thumb_func"));
- else {
- // This needs to emit to a temporary string to get properly quoted
- // MCSymbols when they have spaces in them.
- SmallString<128> Tmp;
- raw_svector_ostream OS(Tmp);
- OS << "\t.thumb_func\t" << *CurrentFnSym;
- OutStreamer.EmitRawText(OS.str());
- }
+ OutStreamer.EmitAssemblerFlag(MCAF_Code16);
+ OutStreamer.EmitThumbFunc(Subtarget->isTargetDarwin()? CurrentFnSym : 0);
}
OutStreamer.EmitLabel(CurrentFnSym);
case 'Q':
case 'R':
case 'H':
- report_fatal_error("llvm does not support 'Q', 'R', and 'H' modifiers!");
+ // These modifiers are not yet supported.
return true;
}
}
// Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
// FIXME:
// The following seem like one-off assembler flags, but they actually need
-// to appear in the .ARM.attributes section in ELF.
+// to appear in the .ARM.attributes section in ELF.
// Instead of subclassing the MCELFStreamer, we do the work here.
void ARMAsmPrinter::emitAttributes() {
- // FIXME: Add in ELF specific section handling here.
-
- // FIXME: unify this: .cpu and CPUString with enum attributes
+
+ emitARMAttributeSection();
+
+ /* GAS expect .fpu to be emitted, regardless of VFP build attribute */
+ bool emitFPU = false;
+ AttributeEmitter *AttrEmitter;
+ if (OutStreamer.hasRawTextSupport()) {
+ AttrEmitter = new AsmAttributeEmitter(OutStreamer);
+ emitFPU = true;
+ } else {
+ MCObjectStreamer &O = static_cast<MCObjectStreamer&>(OutStreamer);
+ AttrEmitter = new ObjectAttributeEmitter(O);
+ }
+
+ AttrEmitter->MaybeSwitchVendor("aeabi");
+
std::string CPUString = Subtarget->getCPUString();
- if (CPUString != "generic")
- OutStreamer.EmitRawText("\t.cpu " + Twine(CPUString));
- // FIXME: Emit FPU type
- if (Subtarget->hasVFP2())
- emitAttribute(ARMBuildAttrs::VFP_arch, 2);
+ if (CPUString == "cortex-a8" ||
+ Subtarget->isCortexA8()) {
+ 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) {
- emitAttribute(ARMBuildAttrs::ABI_FP_denormal, 1);
- emitAttribute(ARMBuildAttrs::ABI_FP_exceptions, 1);
+ AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_denormal,
+ ARMBuildAttrs::Allowed);
+ AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
+ ARMBuildAttrs::Allowed);
}
if (NoInfsFPMath && NoNaNsFPMath)
- emitAttribute(ARMBuildAttrs::ABI_FP_number_model, 1);
+ AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
+ ARMBuildAttrs::Allowed);
else
- emitAttribute(ARMBuildAttrs::ABI_FP_number_model, 3);
+ AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
+ ARMBuildAttrs::AllowIEE754);
+ // FIXME: add more flags to ARMBuildAttrs.h
// 8-bytes alignment stuff.
- emitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
- emitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
+ 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) {
- emitAttribute(ARMBuildAttrs::ABI_HardFP_use, 3);
- emitAttribute(ARMBuildAttrs::ABI_VFP_args, 1);
+ 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::emitAttribute(ARMBuildAttrs::AttrType attr, int v) {
- if (OutStreamer.hasRawTextSupport()) {
- OutStreamer.EmitRawText("\t.eabi_attribute " +
- Twine(attr) + ", " + Twine(v));
-
- } else {
- assert(0 && "ELF .ARM.attributes unimplemented");
- }
+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);
}
//===----------------------------------------------------------------------===//
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;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
unsigned OffsetWidth = 4;
- if (MI->getOpcode() == ARM::t2TBB)
+ if (MI->getOpcode() == ARM::t2TBB_JT)
OffsetWidth = 1;
- else if (MI->getOpcode() == ARM::t2TBH)
+ else if (MI->getOpcode() == ARM::t2TBH_JT)
OffsetWidth = 2;
for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
OutContext);
OutStreamer.EmitValue(Expr, OffsetWidth);
}
-
- // Make sure the instruction that follows TBB is 2-byte aligned.
- // FIXME: Constant island pass should insert an "ALIGN" instruction instead.
- if (MI->getOpcode() == ARM::t2TBB)
- EmitAlignment(1);
}
void ARMAsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
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) {
- ARMMCInstLower MCInstLowering(OutContext, *Mang, *this);
- switch (MI->getOpcode()) {
- case ARM::t2MOVi32imm:
- assert(0 && "Should be lowered by thumb2it pass");
+ 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;
}
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:
switch (MI->getOpcode()) {
default:
llvm_unreachable("Unexpected opcode!");
- case ARM::PICSTR: Opcode = ARM::STR; break;
- case ARM::PICSTRB: Opcode = ARM::STRB; break;
+ 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::LDR; break;
- case ARM::PICLDRB: Opcode = ARM::LDRB; 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;
return;
}
- case ARM::MOVi2pieces: {
- // FIXME: We'd like to remove the asm string in the .td file, but the
- // This is a hack that lowers as a two instruction sequence.
- unsigned DstReg = MI->getOperand(0).getReg();
- unsigned ImmVal = (unsigned)MI->getOperand(1).getImm();
-
- unsigned SOImmValV1 = ARM_AM::getSOImmTwoPartFirst(ImmVal);
- unsigned SOImmValV2 = ARM_AM::getSOImmTwoPartSecond(ImmVal);
-
- {
- MCInst TmpInst;
- TmpInst.setOpcode(ARM::MOVi);
- TmpInst.addOperand(MCOperand::CreateReg(DstReg));
- TmpInst.addOperand(MCOperand::CreateImm(SOImmValV1));
-
- // Predicate.
- TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
- TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(3).getReg()));
-
- TmpInst.addOperand(MCOperand::CreateReg(0)); // cc_out
- OutStreamer.EmitInstruction(TmpInst);
- }
-
- {
- MCInst TmpInst;
- TmpInst.setOpcode(ARM::ORRri);
- TmpInst.addOperand(MCOperand::CreateReg(DstReg)); // dstreg
- TmpInst.addOperand(MCOperand::CreateReg(DstReg)); // inreg
- TmpInst.addOperand(MCOperand::CreateImm(SOImmValV2)); // so_imm
- // Predicate.
- TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
- TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(3).getReg()));
-
- TmpInst.addOperand(MCOperand::CreateReg(0)); // cc_out
- OutStreamer.EmitInstruction(TmpInst);
- }
+ 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::MOVi32imm: {
- // FIXME: We'd like to remove the asm string in the .td file, but the
- // This is a hack that lowers as a two instruction sequence.
- unsigned DstReg = MI->getOperand(0).getReg();
- const MachineOperand &MO = MI->getOperand(1);
- MCOperand V1, V2;
- if (MO.isImm()) {
- unsigned ImmVal = (unsigned)MI->getOperand(1).getImm();
- V1 = MCOperand::CreateImm(ImmVal & 65535);
- V2 = MCOperand::CreateImm(ImmVal >> 16);
- } else if (MO.isGlobal()) {
- MCSymbol *Symbol = MCInstLowering.GetGlobalAddressSymbol(MO.getGlobal());
- const MCSymbolRefExpr *SymRef1 =
- MCSymbolRefExpr::Create(Symbol,
- MCSymbolRefExpr::VK_ARM_LO16, OutContext);
- const MCSymbolRefExpr *SymRef2 =
- MCSymbolRefExpr::Create(Symbol,
- MCSymbolRefExpr::VK_ARM_HI16, OutContext);
- V1 = MCOperand::CreateExpr(SymRef1);
- V2 = MCOperand::CreateExpr(SymRef2);
- } else {
- // FIXME: External symbol?
- MI->dump();
- llvm_unreachable("cannot handle this operand");
- }
-
- {
- MCInst TmpInst;
- TmpInst.setOpcode(ARM::MOVi16);
- TmpInst.addOperand(MCOperand::CreateReg(DstReg)); // dstreg
- TmpInst.addOperand(V1); // lower16(imm)
-
- // Predicate.
- TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
- TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(3).getReg()));
-
- OutStreamer.EmitInstruction(TmpInst);
- }
+ case ARM::t2TBB_JT: {
+ // Lower and emit the instruction itself, then the jump table following it.
+ MCInst TmpInst;
- {
- MCInst TmpInst;
- TmpInst.setOpcode(ARM::MOVTi16);
- TmpInst.addOperand(MCOperand::CreateReg(DstReg)); // dstreg
- TmpInst.addOperand(MCOperand::CreateReg(DstReg)); // srcreg
- TmpInst.addOperand(V2); // upper16(imm)
+ 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;
- // Predicate.
- TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
- TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(3).getReg()));
+ 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);
- 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::t2TBB:
- case ARM::t2TBH:
- case ARM::t2BR_JT: {
+ case ARM::BR_JTm: {
// Lower and emit the instruction itself, then the jump table following it.
+ // ldr pc, target
MCInst TmpInst;
- MCInstLowering.Lower(MI, 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);
- EmitJump2Table(MI);
+
+ // Output the data for the jump table itself
+ EmitJumpTable(MI);
return;
}
- case ARM::tBR_JTr:
- case ARM::BR_JTr:
- case ARM::BR_JTm:
case ARM::BR_JTadd: {
// Lower and emit the instruction itself, then the jump table following it.
+ // add pc, target, idx
MCInst TmpInst;
- MCInstLowering.Lower(MI, 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;
}
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::tSTR);
+ 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));
- TmpInst.addOperand(MCOperand::CreateReg(0));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
TmpInst.addOperand(MCOperand::CreateReg(0));
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::STR);
+ TmpInst.setOpcode(ARM::STRi12);
TmpInst.addOperand(MCOperand::CreateReg(ValReg));
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
- TmpInst.addOperand(MCOperand::CreateReg(0));
TmpInst.addOperand(MCOperand::CreateImm(4));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
unsigned ScratchReg = MI->getOperand(1).getReg();
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::LDR);
+ TmpInst.setOpcode(ARM::LDRi12);
TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
- TmpInst.addOperand(MCOperand::CreateReg(0));
TmpInst.addOperand(MCOperand::CreateImm(8));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::LDR);
+ TmpInst.setOpcode(ARM::LDRi12);
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
- TmpInst.addOperand(MCOperand::CreateReg(0));
TmpInst.addOperand(MCOperand::CreateImm(4));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::LDR);
+ TmpInst.setOpcode(ARM::LDRi12);
TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
- TmpInst.addOperand(MCOperand::CreateReg(0));
TmpInst.addOperand(MCOperand::CreateImm(0));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::BRIND);
+ TmpInst.setOpcode(ARM::BX);
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
unsigned ScratchReg = MI->getOperand(1).getReg();
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::tLDR);
+ 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
- // tSTR instruction.
+ // tLDR instruction.
TmpInst.addOperand(MCOperand::CreateImm(2));
- TmpInst.addOperand(MCOperand::CreateReg(0));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
TmpInst.addOperand(MCOperand::CreateReg(0));
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::tLDR);
+ TmpInst.setOpcode(ARM::tLDRi);
TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
TmpInst.addOperand(MCOperand::CreateImm(1));
- TmpInst.addOperand(MCOperand::CreateReg(0));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
TmpInst.addOperand(MCOperand::CreateReg(0));
}
{
MCInst TmpInst;
- TmpInst.setOpcode(ARM::tLDR);
+ TmpInst.setOpcode(ARM::tLDRr);
TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
- TmpInst.addOperand(MCOperand::CreateImm(0));
TmpInst.addOperand(MCOperand::CreateReg(0));
// Predicate.
TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
}
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;
- MCInstLowering.Lower(MI, TmpInst);
+ LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
+
+ // Emit unwinding stuff for frame-related instructions
+ if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
+ EmitUnwindingInstruction(MI);
+
OutStreamer.EmitInstruction(TmpInst);
}
//===----------------------------------------------------------------------===//
static MCInstPrinter *createARMMCInstPrinter(const Target &T,
+ TargetMachine &TM,
unsigned SyntaxVariant,
const MCAsmInfo &MAI) {
if (SyntaxVariant == 0)
- return new ARMInstPrinter(MAI);
+ return new ARMInstPrinter(TM, MAI);
return 0;
}
projects / oota-llvm.git / blobdiff