X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FARM%2FARMAsmPrinter.cpp;h=41f4d82113442cab130665fc6f5e4734e6afb899;hb=0e9c68e6bc8768143308b0162e900ba8bd10dc01;hp=45118978670193772fc272109ba4433490634da8;hpb=8ea9566feeb85172f1c9120e2f3b7866304004da;p=oota-llvm.git diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp index 45118978670..41f4d821134 100644 --- a/lib/Target/ARM/ARMAsmPrinter.cpp +++ b/lib/Target/ARM/ARMAsmPrinter.cpp @@ -44,6 +44,7 @@ #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/Support/ARMBuildAttributes.h" +#include "llvm/Support/COFF.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ELF.h" @@ -75,13 +76,15 @@ void ARMAsmPrinter::EmitFunctionEntryLabel() { } void ARMAsmPrinter::EmitXXStructor(const Constant *CV) { - uint64_t Size = TM.getDataLayout()->getTypeAllocSize(CV->getType()); + uint64_t Size = + TM.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(CV->getType()); assert(Size && "C++ constructor pointer had zero size!"); const GlobalValue *GV = dyn_cast(CV->stripPointerCasts()); assert(GV && "C++ constructor pointer was not a GlobalValue!"); - const MCExpr *E = MCSymbolRefExpr::Create(getSymbol(GV), + const MCExpr *E = MCSymbolRefExpr::Create(GetARMGVSymbol(GV, + ARMII::MO_NO_FLAG), (Subtarget->isTargetELF() ? MCSymbolRefExpr::VK_ARM_TARGET1 : MCSymbolRefExpr::VK_None), @@ -97,7 +100,28 @@ bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) { AFI = MF.getInfo(); MCP = MF.getConstantPool(); - return AsmPrinter::runOnMachineFunction(MF); + SetupMachineFunction(MF); + + if (Subtarget->isTargetCOFF()) { + bool Internal = MF.getFunction()->hasInternalLinkage(); + COFF::SymbolStorageClass Scl = Internal ? COFF::IMAGE_SYM_CLASS_STATIC + : COFF::IMAGE_SYM_CLASS_EXTERNAL; + int Type = COFF::IMAGE_SYM_DTYPE_FUNCTION << COFF::SCT_COMPLEX_TYPE_SHIFT; + + OutStreamer.BeginCOFFSymbolDef(CurrentFnSym); + OutStreamer.EmitCOFFSymbolStorageClass(Scl); + OutStreamer.EmitCOFFSymbolType(Type); + OutStreamer.EndCOFFSymbolDef(); + } + + // Have common code print out the function header with linkage info etc. + EmitFunctionHeader(); + + // Emit the rest of the function body. + EmitFunctionBody(); + + // We didn't modify anything. + return false; } void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum, @@ -113,7 +137,7 @@ void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum, assert(!MO.getSubReg() && "Subregs should be eliminated!"); if(ARM::GPRPairRegClass.contains(Reg)) { const MachineFunction &MF = *MI->getParent()->getParent(); - const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo(); + const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo(); Reg = TRI->getSubReg(Reg, ARM::gsub_0); } O << ARMInstPrinter::getRegisterName(Reg); @@ -142,7 +166,7 @@ void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum, else if ((Modifier && strcmp(Modifier, "hi16") == 0) || (TF & ARMII::MO_HI16)) O << ":upper16:"; - O << *getSymbol(GV); + O << *GetARMGVSymbol(GV, TF); printOffset(MO.getOffset(), O); if (TF == ARMII::MO_PLT) @@ -159,7 +183,7 @@ void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum, MCSymbol *ARMAsmPrinter:: GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const { - const DataLayout *DL = TM.getDataLayout(); + const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout(); SmallString<60> Name; raw_svector_ostream(Name) << DL->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_' << uid << '_' << uid2; @@ -168,7 +192,7 @@ GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const { MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel() const { - const DataLayout *DL = TM.getDataLayout(); + const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout(); SmallString<60> Name; raw_svector_ostream(Name) << DL->getPrivateGlobalPrefix() << "SJLJEH" << getFunctionNumber(); @@ -206,7 +230,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, case 'y': // Print a VFP single precision register as indexed double. if (MI->getOperand(OpNum).isReg()) { unsigned Reg = MI->getOperand(OpNum).getReg(); - const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo(); + const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo(); // Find the 'd' register that has this 's' register as a sub-register, // and determine the lane number. for (MCSuperRegIterator SR(Reg, TRI); SR.isValid(); ++SR) { @@ -238,7 +262,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, // inline asm statement. O << "{"; if (ARM::GPRPairRegClass.contains(RegBegin)) { - const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo(); + const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo(); unsigned Reg0 = TRI->getSubReg(RegBegin, ARM::gsub_0); O << ARMInstPrinter::getRegisterName(Reg0) << ", "; RegBegin = TRI->getSubReg(RegBegin, ARM::gsub_1); @@ -294,7 +318,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, const MachineOperand &MO = MI->getOperand(OpNum); if (!MO.isReg()) return true; - const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo(); + const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo(); unsigned Reg = TRI->getSubReg(MO.getReg(), ExtraCode[0] == 'Q' ? ARM::gsub_0 : ARM::gsub_1); O << ARMInstPrinter::getRegisterName(Reg); @@ -320,7 +344,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, unsigned Reg = MI->getOperand(OpNum).getReg(); if (!ARM::QPRRegClass.contains(Reg)) return true; - const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo(); + const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo(); unsigned SubReg = TRI->getSubReg(Reg, ExtraCode[0] == 'e' ? ARM::dsub_0 : ARM::dsub_1); O << ARMInstPrinter::getRegisterName(SubReg); @@ -335,7 +359,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, if (!MO.isReg()) return true; const MachineFunction &MF = *MI->getParent()->getParent(); - const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo(); + const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo(); unsigned Reg = MO.getReg(); if(!ARM::GPRPairRegClass.contains(Reg)) return false; @@ -455,6 +479,9 @@ void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) { // Emit ARM Build Attributes if (Subtarget->isTargetELF()) emitAttributes(); + + if (!M.getModuleInlineAsm().empty() && Subtarget->isThumb()) + OutStreamer.EmitAssemblerFlag(MCAF_Code16); } static void @@ -523,6 +550,28 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) { // generates code that does this, it is always safe to set. OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols); } + + // Emit a .data.rel section containing any stubs that were created. + if (Subtarget->isTargetELF()) { + const TargetLoweringObjectFileELF &TLOFELF = + static_cast(getObjFileLowering()); + + MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo(); + + // Output stubs for external and common global variables. + MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList(); + if (!Stubs.empty()) { + OutStreamer.SwitchSection(TLOFELF.getDataRelSection()); + const DataLayout *TD = TM.getSubtargetImpl()->getDataLayout(); + + for (auto &stub: Stubs) { + OutStreamer.EmitLabel(stub.first); + OutStreamer.EmitSymbolValue(stub.second.getPointer(), + TD->getPointerSize(0)); + } + Stubs.clear(); + } + } } //===----------------------------------------------------------------------===// @@ -627,6 +676,20 @@ void ARMAsmPrinter::emitAttributes() { ATS.emitFPU(ARM::VFPV2); } + if (TM.getRelocationModel() == Reloc::PIC_) { + // PIC specific attributes. + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RW_data, + ARMBuildAttrs::AddressRWPCRel); + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RO_data, + ARMBuildAttrs::AddressROPCRel); + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use, + ARMBuildAttrs::AddressGOT); + } else { + // Allow direct addressing of imported data for all other relocation models. + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use, + ARMBuildAttrs::AddressDirect); + } + // Signal various FP modes. if (!TM.Options.UnsafeFPMath) { ATS.emitAttribute(ARMBuildAttrs::ABI_FP_denormal, ARMBuildAttrs::Allowed); @@ -672,6 +735,43 @@ void ARMAsmPrinter::emitAttributes() { if (Subtarget->hasDivideInARMMode() && !Subtarget->hasV8Ops()) ATS.emitAttribute(ARMBuildAttrs::DIV_use, ARMBuildAttrs::AllowDIVExt); + if (MMI) { + if (const Module *SourceModule = MMI->getModule()) { + // ABI_PCS_wchar_t to indicate wchar_t width + // FIXME: There is no way to emit value 0 (wchar_t prohibited). + if (auto WCharWidthValue = cast_or_null( + SourceModule->getModuleFlag("wchar_size"))) { + int WCharWidth = WCharWidthValue->getZExtValue(); + assert((WCharWidth == 2 || WCharWidth == 4) && + "wchar_t width must be 2 or 4 bytes"); + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_wchar_t, WCharWidth); + } + + // ABI_enum_size to indicate enum width + // FIXME: There is no way to emit value 0 (enums prohibited) or value 3 + // (all enums contain a value needing 32 bits to encode). + if (auto EnumWidthValue = cast_or_null( + SourceModule->getModuleFlag("min_enum_size"))) { + int EnumWidth = EnumWidthValue->getZExtValue(); + assert((EnumWidth == 1 || EnumWidth == 4) && + "Minimum enum width must be 1 or 4 bytes"); + int EnumBuildAttr = EnumWidth == 1 ? 1 : 2; + ATS.emitAttribute(ARMBuildAttrs::ABI_enum_size, EnumBuildAttr); + } + } + } + + // TODO: We currently only support either reserving the register, or treating + // it as another callee-saved register, but not as SB or a TLS pointer; It + // would instead be nicer to push this from the frontend as metadata, as we do + // for the wchar and enum size tags + if (Subtarget->isR9Reserved()) + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_R9_use, + ARMBuildAttrs::R9Reserved); + else + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_R9_use, + ARMBuildAttrs::R9IsGPR); + if (Subtarget->hasTrustZone() && Subtarget->hasVirtualization()) ATS.emitAttribute(ARMBuildAttrs::Virtualization_use, ARMBuildAttrs::AllowTZVirtualization); @@ -710,29 +810,48 @@ getModifierVariantKind(ARMCP::ARMCPModifier Modifier) { MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags) { - bool isIndirect = Subtarget->isTargetMachO() && - (TargetFlags & ARMII::MO_NONLAZY) && - Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel()); - if (!isIndirect) - return getSymbol(GV); + if (Subtarget->isTargetMachO()) { + bool IsIndirect = (TargetFlags & ARMII::MO_NONLAZY) && + Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel()); + + if (!IsIndirect) + return getSymbol(GV); - // FIXME: Remove this when Darwin transition to @GOT like syntax. - MCSymbol *MCSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); - MachineModuleInfoMachO &MMIMachO = - MMI->getObjFileInfo(); - MachineModuleInfoImpl::StubValueTy &StubSym = - GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) : - MMIMachO.getGVStubEntry(MCSym); - if (!StubSym.getPointer()) - StubSym = MachineModuleInfoImpl:: - StubValueTy(getSymbol(GV), !GV->hasInternalLinkage()); - return MCSym; + // FIXME: Remove this when Darwin transition to @GOT like syntax. + MCSymbol *MCSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); + MachineModuleInfoMachO &MMIMachO = + MMI->getObjFileInfo(); + MachineModuleInfoImpl::StubValueTy &StubSym = + GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) + : MMIMachO.getGVStubEntry(MCSym); + if (!StubSym.getPointer()) + StubSym = MachineModuleInfoImpl::StubValueTy(getSymbol(GV), + !GV->hasInternalLinkage()); + return MCSym; + } else if (Subtarget->isTargetCOFF()) { + assert(Subtarget->isTargetWindows() && + "Windows is the only supported COFF target"); + + bool IsIndirect = (TargetFlags & ARMII::MO_DLLIMPORT); + if (!IsIndirect) + return getSymbol(GV); + + SmallString<128> Name; + Name = "__imp_"; + getNameWithPrefix(Name, GV); + + return OutContext.GetOrCreateSymbol(Name); + } else if (Subtarget->isTargetELF()) { + return getSymbol(GV); + } + llvm_unreachable("unexpected target"); } void ARMAsmPrinter:: EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) { - const DataLayout *DL = TM.getDataLayout(); - int Size = TM.getDataLayout()->getTypeAllocSize(MCPV->getType()); + const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout(); + int Size = + TM.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(MCPV->getType()); ARMConstantPoolValue *ACPV = static_cast(MCPV); @@ -870,7 +989,7 @@ void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) { for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) { MachineBasicBlock *MBB = JTBBs[i]; const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(), - OutContext); + OutContext); // If this isn't a TBB or TBH, the entries are direct branch instructions. if (OffsetWidth == 4) { EmitToStreamer(OutStreamer, MCInstBuilder(ARM::t2B) @@ -910,7 +1029,7 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) { MCTargetStreamer &TS = *OutStreamer.getTargetStreamer(); ARMTargetStreamer &ATS = static_cast(TS); const MachineFunction &MF = *MI->getParent()->getParent(); - const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo(); + const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo(); const ARMFunctionInfo &AFI = *MF.getInfo(); unsigned FramePtr = RegInfo->getFrameRegister(MF); @@ -971,7 +1090,8 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) { RegList.push_back(SrcReg); break; } - ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD); + if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM) + ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD); } else { // Changes of stack / frame pointer. if (SrcReg == ARM::SP) { @@ -1016,18 +1136,20 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) { } } - if (DstReg == FramePtr && FramePtr != ARM::SP) - // Set-up of the frame pointer. Positive values correspond to "add" - // instruction. - ATS.emitSetFP(FramePtr, ARM::SP, -Offset); - else if (DstReg == ARM::SP) { - // Change of SP by an offset. Positive values correspond to "sub" - // instruction. - ATS.emitPad(Offset); - } else { - // Move of SP to a register. Positive values correspond to an "add" - // instruction. - ATS.emitMovSP(DstReg, -Offset); + if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM) { + if (DstReg == FramePtr && FramePtr != ARM::SP) + // Set-up of the frame pointer. Positive values correspond to "add" + // instruction. + ATS.emitSetFP(FramePtr, ARM::SP, -Offset); + else if (DstReg == ARM::SP) { + // Change of SP by an offset. Positive values correspond to "sub" + // instruction. + ATS.emitPad(Offset); + } else { + // Move of SP to a register. Positive values correspond to an "add" + // instruction. + ATS.emitMovSP(DstReg, -Offset); + } } } else if (DstReg == ARM::SP) { MI->dump(); @@ -1045,7 +1167,7 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) { #include "ARMGenMCPseudoLowering.inc" void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) { - const DataLayout *DL = TM.getDataLayout(); + const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout(); // If we just ended a constant pool, mark it as such. if (InConstantPool && MI->getOpcode() != ARM::CONSTPOOL_ENTRY) { @@ -1164,8 +1286,10 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) { // Add 's' bit operand (always reg0 for this) .addReg(0)); - const GlobalValue *GV = MI->getOperand(0).getGlobal(); - MCSymbol *GVSym = getSymbol(GV); + const MachineOperand &Op = MI->getOperand(0); + const GlobalValue *GV = Op.getGlobal(); + const unsigned TF = Op.getTargetFlags(); + MCSymbol *GVSym = GetARMGVSymbol(GV, TF); const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext); EmitToStreamer(OutStreamer, MCInstBuilder(ARM::Bcc) .addExpr(GVSymExpr)