Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 1 | //===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===// |
Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 081ce94 | 2007-12-29 20:36:04 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 10 | // This file contains a printer that converts from our internal representation |
| 11 | // of machine-dependent LLVM code to AT&T format assembly |
| 12 | // language. This printer is the output mechanism used by `llc'. |
Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 13 | // |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 16 | #define DEBUG_TYPE "asm-printer" |
| 17 | #include "X86AsmPrinter.h" |
| 18 | #include "X86ATTInstPrinter.h" |
| 19 | #include "X86IntelInstPrinter.h" |
| 20 | #include "X86MCInstLower.h" |
| 21 | #include "X86.h" |
| 22 | #include "X86COFF.h" |
| 23 | #include "X86COFFMachineModuleInfo.h" |
| 24 | #include "X86MachineFunctionInfo.h" |
| 25 | #include "X86TargetMachine.h" |
| 26 | #include "llvm/CallingConv.h" |
| 27 | #include "llvm/DerivedTypes.h" |
| 28 | #include "llvm/Module.h" |
| 29 | #include "llvm/Type.h" |
| 30 | #include "llvm/Assembly/Writer.h" |
| 31 | #include "llvm/MC/MCContext.h" |
| 32 | #include "llvm/MC/MCSectionMachO.h" |
| 33 | #include "llvm/MC/MCStreamer.h" |
| 34 | #include "llvm/MC/MCSymbol.h" |
| 35 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
| 36 | #include "llvm/CodeGen/MachineModuleInfoImpls.h" |
| 37 | #include "llvm/Support/ErrorHandling.h" |
| 38 | #include "llvm/Support/FormattedStream.h" |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 39 | #include "llvm/MC/MCAsmInfo.h" |
| 40 | #include "llvm/Target/TargetLoweringObjectFile.h" |
| 41 | #include "llvm/Target/TargetOptions.h" |
| 42 | #include "llvm/Target/TargetRegistry.h" |
| 43 | #include "llvm/ADT/SmallString.h" |
| 44 | #include "llvm/ADT/Statistic.h" |
| 45 | using namespace llvm; |
| 46 | |
| 47 | STATISTIC(EmittedInsts, "Number of machine instrs printed"); |
| 48 | |
| 49 | //===----------------------------------------------------------------------===// |
| 50 | // Primitive Helper Functions. |
| 51 | //===----------------------------------------------------------------------===// |
| 52 | |
| 53 | void X86AsmPrinter::printMCInst(const MCInst *MI) { |
| 54 | if (MAI->getAssemblerDialect() == 0) |
| 55 | X86ATTInstPrinter(O, *MAI).printInstruction(MI); |
| 56 | else |
| 57 | X86IntelInstPrinter(O, *MAI).printInstruction(MI); |
| 58 | } |
| 59 | |
| 60 | void X86AsmPrinter::PrintPICBaseSymbol() const { |
| 61 | // FIXME: Gross const cast hack. |
| 62 | X86AsmPrinter *AP = const_cast<X86AsmPrinter*>(this); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 63 | O << *X86MCInstLower(OutContext, 0, *AP).GetPICBaseSymbol(); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | void X86AsmPrinter::emitFunctionHeader(const MachineFunction &MF) { |
| 67 | unsigned FnAlign = MF.getAlignment(); |
| 68 | const Function *F = MF.getFunction(); |
| 69 | |
| 70 | if (Subtarget->isTargetCygMing()) { |
| 71 | X86COFFMachineModuleInfo &COFFMMI = |
| 72 | MMI->getObjFileInfo<X86COFFMachineModuleInfo>(); |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 73 | COFFMMI.DecorateCygMingName(CurrentFnSym, OutContext, F, |
| 74 | *TM.getTargetData()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM)); |
| 78 | EmitAlignment(FnAlign, F); |
| 79 | |
| 80 | switch (F->getLinkage()) { |
| 81 | default: llvm_unreachable("Unknown linkage type!"); |
| 82 | case Function::InternalLinkage: // Symbols default to internal. |
| 83 | case Function::PrivateLinkage: |
| 84 | break; |
| 85 | case Function::DLLExportLinkage: |
| 86 | case Function::ExternalLinkage: |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 87 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCStreamer::Global); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 88 | break; |
| 89 | case Function::LinkerPrivateLinkage: |
| 90 | case Function::LinkOnceAnyLinkage: |
| 91 | case Function::LinkOnceODRLinkage: |
| 92 | case Function::WeakAnyLinkage: |
| 93 | case Function::WeakODRLinkage: |
| 94 | if (Subtarget->isTargetDarwin()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 95 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCStreamer::Global); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 96 | O << MAI->getWeakDefDirective() << *CurrentFnSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 97 | } else if (Subtarget->isTargetCygMing()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 98 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCStreamer::Global); |
| 99 | O << "\t.linkonce discard\n"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 100 | } else { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 101 | O << "\t.weak\t" << *CurrentFnSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 102 | } |
| 103 | break; |
| 104 | } |
| 105 | |
Chris Lattner | 86ec971 | 2010-01-16 00:32:38 +0000 | [diff] [blame] | 106 | printVisibility(CurrentFnSym, F->getVisibility()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 107 | |
Chris Lattner | 86ec971 | 2010-01-16 00:32:38 +0000 | [diff] [blame] | 108 | if (Subtarget->isTargetELF()) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 109 | O << "\t.type\t" << *CurrentFnSym << ",@function\n"; |
Chris Lattner | 86ec971 | 2010-01-16 00:32:38 +0000 | [diff] [blame] | 110 | } else if (Subtarget->isTargetCygMing()) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 111 | O << "\t.def\t " << *CurrentFnSym; |
Chris Lattner | 86ec971 | 2010-01-16 00:32:38 +0000 | [diff] [blame] | 112 | O << ";\t.scl\t" << |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 113 | (F->hasInternalLinkage() ? COFF::C_STAT : COFF::C_EXT) |
| 114 | << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT) |
| 115 | << ";\t.endef\n"; |
| 116 | } |
| 117 | |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 118 | O << *CurrentFnSym << ':'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 119 | if (VerboseAsm) { |
| 120 | O.PadToColumn(MAI->getCommentColumn()); |
| 121 | O << MAI->getCommentString() << ' '; |
| 122 | WriteAsOperand(O, F, /*PrintType=*/false, F->getParent()); |
| 123 | } |
| 124 | O << '\n'; |
| 125 | |
| 126 | // Add some workaround for linkonce linkage on Cygwin\MinGW |
| 127 | if (Subtarget->isTargetCygMing() && |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 128 | (F->hasLinkOnceLinkage() || F->hasWeakLinkage())) |
| 129 | O << "Lllvm$workaround$fake$stub$" << *CurrentFnSym << ":\n"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | /// runOnMachineFunction - This uses the printMachineInstruction() |
| 133 | /// method to print assembly for each instruction. |
| 134 | /// |
| 135 | bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) { |
| 136 | const Function *F = MF.getFunction(); |
| 137 | this->MF = &MF; |
| 138 | CallingConv::ID CC = F->getCallingConv(); |
| 139 | |
| 140 | SetupMachineFunction(MF); |
| 141 | O << "\n\n"; |
| 142 | |
| 143 | if (Subtarget->isTargetCOFF()) { |
| 144 | X86COFFMachineModuleInfo &COFFMMI = |
| 145 | MMI->getObjFileInfo<X86COFFMachineModuleInfo>(); |
| 146 | |
| 147 | // Populate function information map. Don't want to populate |
| 148 | // non-stdcall or non-fastcall functions' information right now. |
| 149 | if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall) |
| 150 | COFFMMI.AddFunctionInfo(F, *MF.getInfo<X86MachineFunctionInfo>()); |
| 151 | } |
| 152 | |
| 153 | // Print out constants referenced by the function |
| 154 | EmitConstantPool(MF.getConstantPool()); |
| 155 | |
| 156 | // Print the 'header' of function |
| 157 | emitFunctionHeader(MF); |
| 158 | |
| 159 | // Emit pre-function debug and/or EH information. |
| 160 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
| 161 | DW->BeginFunction(&MF); |
| 162 | |
| 163 | // Print out code for the function. |
| 164 | bool hasAnyRealCode = false; |
| 165 | for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); |
| 166 | I != E; ++I) { |
| 167 | // Print a label for the basic block. |
Dan Gohman | 5fda434 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 168 | EmitBasicBlockStart(I); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 169 | for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); |
| 170 | II != IE; ++II) { |
| 171 | // Print the assembly for the instruction. |
| 172 | if (!II->isLabel()) |
| 173 | hasAnyRealCode = true; |
| 174 | printMachineInstruction(II); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | if (Subtarget->isTargetDarwin() && !hasAnyRealCode) { |
| 179 | // If the function is empty, then we need to emit *something*. Otherwise, |
| 180 | // the function's label might be associated with something that it wasn't |
| 181 | // meant to be associated with. We emit a noop in this situation. |
| 182 | // We are assuming inline asms are code. |
| 183 | O << "\tnop\n"; |
| 184 | } |
| 185 | |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 186 | if (MAI->hasDotTypeDotSizeDirective()) |
| 187 | O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 188 | |
| 189 | // Emit post-function debug information. |
| 190 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
| 191 | DW->EndFunction(&MF); |
| 192 | |
| 193 | // Print out jump tables referenced by the function. |
| 194 | EmitJumpTableInfo(MF.getJumpTableInfo(), MF); |
| 195 | |
| 196 | // We didn't modify anything. |
| 197 | return false; |
| 198 | } |
| 199 | |
| 200 | /// printSymbolOperand - Print a raw symbol reference operand. This handles |
| 201 | /// jump tables, constant pools, global address and external symbols, all of |
| 202 | /// which print to a label with various suffixes for relocation types etc. |
| 203 | void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO) { |
| 204 | switch (MO.getType()) { |
| 205 | default: llvm_unreachable("unknown symbol type!"); |
| 206 | case MachineOperand::MO_JumpTableIndex: |
| 207 | O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_' |
| 208 | << MO.getIndex(); |
| 209 | break; |
| 210 | case MachineOperand::MO_ConstantPoolIndex: |
| 211 | O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_' |
| 212 | << MO.getIndex(); |
| 213 | printOffset(MO.getOffset()); |
| 214 | break; |
| 215 | case MachineOperand::MO_GlobalAddress: { |
| 216 | const GlobalValue *GV = MO.getGlobal(); |
| 217 | |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 218 | MCSymbol *GVSym; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 219 | if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) |
Chris Lattner | a6f2a10 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 220 | GVSym = GetSymbolWithGlobalValueBase(GV, "$stub"); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 221 | else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY || |
| 222 | MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE || |
| 223 | MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE) |
Chris Lattner | a6f2a10 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 224 | GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 225 | else |
| 226 | GVSym = GetGlobalValueSymbol(GV); |
| 227 | |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 228 | if (Subtarget->isTargetCygMing()) { |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 229 | X86COFFMachineModuleInfo &COFFMMI = |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 230 | MMI->getObjFileInfo<X86COFFMachineModuleInfo>(); |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 231 | COFFMMI.DecorateCygMingName(GVSym, OutContext, GV, *TM.getTargetData()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | // Handle dllimport linkage. |
| 235 | if (MO.getTargetFlags() == X86II::MO_DLLIMPORT) |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 236 | GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 237 | |
| 238 | if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY || |
| 239 | MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) { |
Chris Lattner | a6f2a10 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 240 | MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 241 | |
| 242 | const MCSymbol *&StubSym = |
| 243 | MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym); |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 244 | if (StubSym == 0) |
| 245 | StubSym = GetGlobalValueSymbol(GV); |
| 246 | |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 247 | } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){ |
Chris Lattner | a6f2a10 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 248 | MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 249 | const MCSymbol *&StubSym = |
| 250 | MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym); |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 251 | if (StubSym == 0) |
| 252 | StubSym = GetGlobalValueSymbol(GV); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 253 | } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) { |
Chris Lattner | a6f2a10 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 254 | MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub"); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 255 | const MCSymbol *&StubSym = |
| 256 | MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym); |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 257 | if (StubSym == 0) |
| 258 | StubSym = GetGlobalValueSymbol(GV); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | // If the name begins with a dollar-sign, enclose it in parens. We do this |
| 262 | // to avoid having it look like an integer immediate to the assembler. |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 263 | if (GVSym->getName()[0] != '$') |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 264 | O << *GVSym; |
| 265 | else |
| 266 | O << '(' << *GVSym << ')'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 267 | printOffset(MO.getOffset()); |
| 268 | break; |
| 269 | } |
| 270 | case MachineOperand::MO_ExternalSymbol: { |
Chris Lattner | f80743e | 2010-01-13 07:56:59 +0000 | [diff] [blame] | 271 | const MCSymbol *SymToPrint; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 272 | if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) { |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 273 | SmallString<128> TempNameStr; |
| 274 | TempNameStr += StringRef(MO.getSymbolName()); |
| 275 | TempNameStr += StringRef("$stub"); |
| 276 | |
| 277 | const MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 278 | const MCSymbol *&StubSym = |
| 279 | MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym); |
| 280 | if (StubSym == 0) { |
Chris Lattner | a38b287 | 2010-01-13 06:38:18 +0000 | [diff] [blame] | 281 | TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end()); |
| 282 | StubSym = OutContext.GetOrCreateSymbol(TempNameStr.str()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 283 | } |
Chris Lattner | f80743e | 2010-01-13 07:56:59 +0000 | [diff] [blame] | 284 | SymToPrint = StubSym; |
| 285 | } else { |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 286 | SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | // If the name begins with a dollar-sign, enclose it in parens. We do this |
| 290 | // to avoid having it look like an integer immediate to the assembler. |
Chris Lattner | f80743e | 2010-01-13 07:56:59 +0000 | [diff] [blame] | 291 | if (SymToPrint->getName()[0] != '$') |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 292 | O << *SymToPrint; |
| 293 | else |
| 294 | O << '(' << *SymToPrint << '('; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 295 | break; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | switch (MO.getTargetFlags()) { |
| 300 | default: |
| 301 | llvm_unreachable("Unknown target flag on GV operand"); |
| 302 | case X86II::MO_NO_FLAG: // No flag. |
| 303 | break; |
| 304 | case X86II::MO_DARWIN_NONLAZY: |
| 305 | case X86II::MO_DLLIMPORT: |
| 306 | case X86II::MO_DARWIN_STUB: |
| 307 | // These affect the name of the symbol, not any suffix. |
| 308 | break; |
| 309 | case X86II::MO_GOT_ABSOLUTE_ADDRESS: |
| 310 | O << " + [.-"; |
| 311 | PrintPICBaseSymbol(); |
| 312 | O << ']'; |
| 313 | break; |
| 314 | case X86II::MO_PIC_BASE_OFFSET: |
| 315 | case X86II::MO_DARWIN_NONLAZY_PIC_BASE: |
| 316 | case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE: |
| 317 | O << '-'; |
| 318 | PrintPICBaseSymbol(); |
| 319 | break; |
| 320 | case X86II::MO_TLSGD: O << "@TLSGD"; break; |
| 321 | case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break; |
| 322 | case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break; |
| 323 | case X86II::MO_TPOFF: O << "@TPOFF"; break; |
| 324 | case X86II::MO_NTPOFF: O << "@NTPOFF"; break; |
| 325 | case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break; |
| 326 | case X86II::MO_GOT: O << "@GOT"; break; |
| 327 | case X86II::MO_GOTOFF: O << "@GOTOFF"; break; |
| 328 | case X86II::MO_PLT: O << "@PLT"; break; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /// print_pcrel_imm - This is used to print an immediate value that ends up |
| 333 | /// being encoded as a pc-relative value. These print slightly differently, for |
| 334 | /// example, a $ is not emitted. |
| 335 | void X86AsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) { |
| 336 | const MachineOperand &MO = MI->getOperand(OpNo); |
| 337 | switch (MO.getType()) { |
| 338 | default: llvm_unreachable("Unknown pcrel immediate operand"); |
| 339 | case MachineOperand::MO_Immediate: |
| 340 | O << MO.getImm(); |
| 341 | return; |
| 342 | case MachineOperand::MO_MachineBasicBlock: |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 343 | O << *GetMBBSymbol(MO.getMBB()->getNumber()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 344 | return; |
| 345 | case MachineOperand::MO_GlobalAddress: |
| 346 | case MachineOperand::MO_ExternalSymbol: |
| 347 | printSymbolOperand(MO); |
| 348 | return; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | |
| 353 | void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo, |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 354 | const char *Modifier) { |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 355 | const MachineOperand &MO = MI->getOperand(OpNo); |
| 356 | switch (MO.getType()) { |
| 357 | default: llvm_unreachable("unknown operand type!"); |
| 358 | case MachineOperand::MO_Register: { |
| 359 | O << '%'; |
| 360 | unsigned Reg = MO.getReg(); |
| 361 | if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) { |
| 362 | EVT VT = (strcmp(Modifier+6,"64") == 0) ? |
| 363 | MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 : |
| 364 | ((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8)); |
| 365 | Reg = getX86SubSuperRegister(Reg, VT); |
| 366 | } |
| 367 | O << X86ATTInstPrinter::getRegisterName(Reg); |
| 368 | return; |
| 369 | } |
| 370 | |
| 371 | case MachineOperand::MO_Immediate: |
| 372 | O << '$' << MO.getImm(); |
| 373 | return; |
| 374 | |
| 375 | case MachineOperand::MO_JumpTableIndex: |
| 376 | case MachineOperand::MO_ConstantPoolIndex: |
| 377 | case MachineOperand::MO_GlobalAddress: |
| 378 | case MachineOperand::MO_ExternalSymbol: { |
| 379 | O << '$'; |
| 380 | printSymbolOperand(MO); |
| 381 | break; |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) { |
| 387 | unsigned char value = MI->getOperand(Op).getImm(); |
| 388 | assert(value <= 7 && "Invalid ssecc argument!"); |
| 389 | switch (value) { |
| 390 | case 0: O << "eq"; break; |
| 391 | case 1: O << "lt"; break; |
| 392 | case 2: O << "le"; break; |
| 393 | case 3: O << "unord"; break; |
| 394 | case 4: O << "neq"; break; |
| 395 | case 5: O << "nlt"; break; |
| 396 | case 6: O << "nle"; break; |
| 397 | case 7: O << "ord"; break; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op, |
| 402 | const char *Modifier) { |
| 403 | const MachineOperand &BaseReg = MI->getOperand(Op); |
| 404 | const MachineOperand &IndexReg = MI->getOperand(Op+2); |
| 405 | const MachineOperand &DispSpec = MI->getOperand(Op+3); |
| 406 | |
| 407 | // If we really don't want to print out (rip), don't. |
| 408 | bool HasBaseReg = BaseReg.getReg() != 0; |
| 409 | if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") && |
| 410 | BaseReg.getReg() == X86::RIP) |
| 411 | HasBaseReg = false; |
| 412 | |
| 413 | // HasParenPart - True if we will print out the () part of the mem ref. |
| 414 | bool HasParenPart = IndexReg.getReg() || HasBaseReg; |
| 415 | |
| 416 | if (DispSpec.isImm()) { |
| 417 | int DispVal = DispSpec.getImm(); |
| 418 | if (DispVal || !HasParenPart) |
| 419 | O << DispVal; |
| 420 | } else { |
| 421 | assert(DispSpec.isGlobal() || DispSpec.isCPI() || |
| 422 | DispSpec.isJTI() || DispSpec.isSymbol()); |
| 423 | printSymbolOperand(MI->getOperand(Op+3)); |
| 424 | } |
| 425 | |
| 426 | if (HasParenPart) { |
| 427 | assert(IndexReg.getReg() != X86::ESP && |
| 428 | "X86 doesn't allow scaling by ESP"); |
| 429 | |
| 430 | O << '('; |
| 431 | if (HasBaseReg) |
| 432 | printOperand(MI, Op, Modifier); |
| 433 | |
| 434 | if (IndexReg.getReg()) { |
| 435 | O << ','; |
| 436 | printOperand(MI, Op+2, Modifier); |
| 437 | unsigned ScaleVal = MI->getOperand(Op+1).getImm(); |
| 438 | if (ScaleVal != 1) |
| 439 | O << ',' << ScaleVal; |
| 440 | } |
| 441 | O << ')'; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op, |
| 446 | const char *Modifier) { |
| 447 | assert(isMem(MI, Op) && "Invalid memory reference!"); |
| 448 | const MachineOperand &Segment = MI->getOperand(Op+4); |
| 449 | if (Segment.getReg()) { |
| 450 | printOperand(MI, Op+4, Modifier); |
| 451 | O << ':'; |
| 452 | } |
| 453 | printLeaMemReference(MI, Op, Modifier); |
| 454 | } |
| 455 | |
| 456 | void X86AsmPrinter::printPICJumpTableSetLabel(unsigned uid, |
| 457 | const MachineBasicBlock *MBB) const { |
| 458 | if (!MAI->getSetDirective()) |
| 459 | return; |
| 460 | |
| 461 | // We don't need .set machinery if we have GOT-style relocations |
| 462 | if (Subtarget->isPICStyleGOT()) |
| 463 | return; |
| 464 | |
| 465 | O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix() |
| 466 | << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ','; |
| 467 | |
Chris Lattner | f11b3ed | 2010-01-18 00:21:06 +0000 | [diff] [blame] | 468 | O << *GetMBBSymbol(MBB->getNumber()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 469 | |
| 470 | if (Subtarget->isPICStyleRIPRel()) |
| 471 | O << '-' << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() |
| 472 | << '_' << uid << '\n'; |
| 473 | else { |
| 474 | O << '-'; |
| 475 | PrintPICBaseSymbol(); |
| 476 | O << '\n'; |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | |
| 481 | void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) { |
| 482 | PrintPICBaseSymbol(); |
| 483 | O << '\n'; |
| 484 | PrintPICBaseSymbol(); |
| 485 | O << ':'; |
| 486 | } |
| 487 | |
| 488 | void X86AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 489 | const MachineBasicBlock *MBB, |
| 490 | unsigned uid) const { |
| 491 | const char *JTEntryDirective = MJTI->getEntrySize() == 4 ? |
| 492 | MAI->getData32bitsDirective() : MAI->getData64bitsDirective(); |
| 493 | |
| 494 | O << JTEntryDirective << ' '; |
| 495 | |
| 496 | if (Subtarget->isPICStyleRIPRel() || Subtarget->isPICStyleStubPIC()) { |
| 497 | O << MAI->getPrivateGlobalPrefix() << getFunctionNumber() |
| 498 | << '_' << uid << "_set_" << MBB->getNumber(); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 499 | } else if (Subtarget->isPICStyleGOT()) |
| 500 | O << *GetMBBSymbol(MBB->getNumber()) << "@GOTOFF"; |
| 501 | else |
| 502 | O << *GetMBBSymbol(MBB->getNumber()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode) { |
| 506 | unsigned Reg = MO.getReg(); |
| 507 | switch (Mode) { |
| 508 | default: return true; // Unknown mode. |
| 509 | case 'b': // Print QImode register |
| 510 | Reg = getX86SubSuperRegister(Reg, MVT::i8); |
| 511 | break; |
| 512 | case 'h': // Print QImode high register |
| 513 | Reg = getX86SubSuperRegister(Reg, MVT::i8, true); |
| 514 | break; |
| 515 | case 'w': // Print HImode register |
| 516 | Reg = getX86SubSuperRegister(Reg, MVT::i16); |
| 517 | break; |
| 518 | case 'k': // Print SImode register |
| 519 | Reg = getX86SubSuperRegister(Reg, MVT::i32); |
| 520 | break; |
| 521 | case 'q': // Print DImode register |
| 522 | Reg = getX86SubSuperRegister(Reg, MVT::i64); |
| 523 | break; |
| 524 | } |
| 525 | |
| 526 | O << '%' << X86ATTInstPrinter::getRegisterName(Reg); |
| 527 | return false; |
| 528 | } |
| 529 | |
| 530 | /// PrintAsmOperand - Print out an operand for an inline asm expression. |
| 531 | /// |
| 532 | bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, |
| 533 | unsigned AsmVariant, |
| 534 | const char *ExtraCode) { |
| 535 | // Does this asm operand have a single letter operand modifier? |
| 536 | if (ExtraCode && ExtraCode[0]) { |
| 537 | if (ExtraCode[1] != 0) return true; // Unknown modifier. |
| 538 | |
| 539 | const MachineOperand &MO = MI->getOperand(OpNo); |
| 540 | |
| 541 | switch (ExtraCode[0]) { |
| 542 | default: return true; // Unknown modifier. |
| 543 | case 'a': // This is an address. Currently only 'i' and 'r' are expected. |
| 544 | if (MO.isImm()) { |
| 545 | O << MO.getImm(); |
| 546 | return false; |
| 547 | } |
| 548 | if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) { |
| 549 | printSymbolOperand(MO); |
| 550 | return false; |
| 551 | } |
| 552 | if (MO.isReg()) { |
| 553 | O << '('; |
| 554 | printOperand(MI, OpNo); |
| 555 | O << ')'; |
| 556 | return false; |
| 557 | } |
| 558 | return true; |
| 559 | |
| 560 | case 'c': // Don't print "$" before a global var name or constant. |
| 561 | if (MO.isImm()) |
| 562 | O << MO.getImm(); |
| 563 | else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) |
| 564 | printSymbolOperand(MO); |
| 565 | else |
| 566 | printOperand(MI, OpNo); |
| 567 | return false; |
| 568 | |
| 569 | case 'A': // Print '*' before a register (it must be a register) |
| 570 | if (MO.isReg()) { |
| 571 | O << '*'; |
| 572 | printOperand(MI, OpNo); |
| 573 | return false; |
| 574 | } |
| 575 | return true; |
| 576 | |
| 577 | case 'b': // Print QImode register |
| 578 | case 'h': // Print QImode high register |
| 579 | case 'w': // Print HImode register |
| 580 | case 'k': // Print SImode register |
| 581 | case 'q': // Print DImode register |
| 582 | if (MO.isReg()) |
| 583 | return printAsmMRegister(MO, ExtraCode[0]); |
| 584 | printOperand(MI, OpNo); |
| 585 | return false; |
| 586 | |
| 587 | case 'P': // This is the operand of a call, treat specially. |
| 588 | print_pcrel_imm(MI, OpNo); |
| 589 | return false; |
| 590 | |
| 591 | case 'n': // Negate the immediate or print a '-' before the operand. |
| 592 | // Note: this is a temporary solution. It should be handled target |
| 593 | // independently as part of the 'MC' work. |
| 594 | if (MO.isImm()) { |
| 595 | O << -MO.getImm(); |
| 596 | return false; |
| 597 | } |
| 598 | O << '-'; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | printOperand(MI, OpNo); |
| 603 | return false; |
| 604 | } |
| 605 | |
| 606 | bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, |
| 607 | unsigned OpNo, unsigned AsmVariant, |
| 608 | const char *ExtraCode) { |
| 609 | if (ExtraCode && ExtraCode[0]) { |
| 610 | if (ExtraCode[1] != 0) return true; // Unknown modifier. |
| 611 | |
| 612 | switch (ExtraCode[0]) { |
| 613 | default: return true; // Unknown modifier. |
| 614 | case 'b': // Print QImode register |
| 615 | case 'h': // Print QImode high register |
| 616 | case 'w': // Print HImode register |
| 617 | case 'k': // Print SImode register |
| 618 | case 'q': // Print SImode register |
| 619 | // These only apply to registers, ignore on mem. |
| 620 | break; |
| 621 | case 'P': // Don't print @PLT, but do print as memory. |
| 622 | printMemReference(MI, OpNo, "no-rip"); |
| 623 | return false; |
| 624 | } |
| 625 | } |
| 626 | printMemReference(MI, OpNo); |
| 627 | return false; |
| 628 | } |
| 629 | |
| 630 | |
| 631 | |
| 632 | /// printMachineInstruction -- Print out a single X86 LLVM instruction MI in |
| 633 | /// AT&T syntax to the current output stream. |
| 634 | /// |
| 635 | void X86AsmPrinter::printMachineInstruction(const MachineInstr *MI) { |
| 636 | ++EmittedInsts; |
| 637 | |
Devang Patel | 5450fc1 | 2009-10-06 02:19:11 +0000 | [diff] [blame] | 638 | processDebugLoc(MI, true); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 639 | |
| 640 | printInstructionThroughMCStreamer(MI); |
| 641 | |
David Greene | ca9b04b | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 642 | if (VerboseAsm) |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 643 | EmitComments(*MI); |
| 644 | O << '\n'; |
Devang Patel | 5450fc1 | 2009-10-06 02:19:11 +0000 | [diff] [blame] | 645 | |
| 646 | processDebugLoc(MI, false); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | void X86AsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) { |
| 650 | if (!GVar->hasInitializer()) |
| 651 | return; // External global require no code |
| 652 | |
| 653 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 654 | if (EmitSpecialLLVMGlobal(GVar)) { |
| 655 | if (Subtarget->isTargetDarwin() && |
| 656 | TM.getRelocationModel() == Reloc::Static) { |
| 657 | if (GVar->getName() == "llvm.global_ctors") |
| 658 | O << ".reference .constructors_used\n"; |
| 659 | else if (GVar->getName() == "llvm.global_dtors") |
| 660 | O << ".reference .destructors_used\n"; |
| 661 | } |
| 662 | return; |
| 663 | } |
| 664 | |
| 665 | const TargetData *TD = TM.getTargetData(); |
| 666 | |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 667 | MCSymbol *GVSym = GetGlobalValueSymbol(GVar); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 668 | Constant *C = GVar->getInitializer(); |
| 669 | const Type *Type = C->getType(); |
| 670 | unsigned Size = TD->getTypeAllocSize(Type); |
| 671 | unsigned Align = TD->getPreferredAlignmentLog(GVar); |
| 672 | |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 673 | printVisibility(GVSym, GVar->getVisibility()); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 674 | |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 675 | if (Subtarget->isTargetELF()) |
| 676 | O << "\t.type\t" << *GVSym << ",@object\n"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 677 | |
| 678 | SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GVar, TM); |
| 679 | const MCSection *TheSection = |
| 680 | getObjFileLowering().SectionForGlobal(GVar, GVKind, Mang, TM); |
| 681 | OutStreamer.SwitchSection(TheSection); |
| 682 | |
| 683 | // FIXME: get this stuff from section kind flags. |
| 684 | if (C->isNullValue() && !GVar->hasSection() && |
| 685 | // Don't put things that should go in the cstring section into "comm". |
| 686 | !TheSection->getKind().isMergeableCString()) { |
| 687 | if (GVar->hasExternalLinkage()) { |
| 688 | if (const char *Directive = MAI->getZeroFillDirective()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 689 | OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 690 | O << Directive << "__DATA, __common, " << *GVSym; |
Chris Lattner | 178a932 | 2010-01-16 01:00:27 +0000 | [diff] [blame] | 691 | O << ", " << Size << ", " << Align << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 692 | return; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | if (!GVar->isThreadLocal() && |
| 697 | (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) { |
| 698 | if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
| 699 | |
| 700 | if (MAI->getLCOMMDirective() != NULL) { |
| 701 | if (GVar->hasLocalLinkage()) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 702 | O << MAI->getLCOMMDirective() << *GVSym << ',' << Size; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 703 | if (Subtarget->isTargetDarwin()) |
| 704 | O << ',' << Align; |
| 705 | } else if (Subtarget->isTargetDarwin() && !GVar->hasCommonLinkage()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 706 | OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 707 | O << MAI->getWeakDefDirective() << *GVSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 708 | EmitAlignment(Align, GVar); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 709 | O << *GVSym << ":"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 710 | if (VerboseAsm) { |
| 711 | O.PadToColumn(MAI->getCommentColumn()); |
| 712 | O << MAI->getCommentString() << ' '; |
| 713 | WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent()); |
| 714 | } |
| 715 | O << '\n'; |
| 716 | EmitGlobalConstant(C); |
| 717 | return; |
| 718 | } else { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 719 | O << MAI->getCOMMDirective() << *GVSym << ',' << Size; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 720 | if (MAI->getCOMMDirectiveTakesAlignment()) |
| 721 | O << ',' << (MAI->getAlignmentIsInBytes() ? (1 << Align) : Align); |
| 722 | } |
| 723 | } else { |
| 724 | if (!Subtarget->isTargetCygMing()) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 725 | if (GVar->hasLocalLinkage()) |
| 726 | O << "\t.local\t" << *GVSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 727 | } |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 728 | O << MAI->getCOMMDirective() << *GVSym << ',' << Size; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 729 | if (MAI->getCOMMDirectiveTakesAlignment()) |
| 730 | O << ',' << (MAI->getAlignmentIsInBytes() ? (1 << Align) : Align); |
| 731 | } |
| 732 | if (VerboseAsm) { |
| 733 | O.PadToColumn(MAI->getCommentColumn()); |
| 734 | O << MAI->getCommentString() << ' '; |
| 735 | WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent()); |
| 736 | } |
| 737 | O << '\n'; |
| 738 | return; |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | switch (GVar->getLinkage()) { |
| 743 | case GlobalValue::CommonLinkage: |
| 744 | case GlobalValue::LinkOnceAnyLinkage: |
| 745 | case GlobalValue::LinkOnceODRLinkage: |
| 746 | case GlobalValue::WeakAnyLinkage: |
| 747 | case GlobalValue::WeakODRLinkage: |
| 748 | case GlobalValue::LinkerPrivateLinkage: |
| 749 | if (Subtarget->isTargetDarwin()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 750 | OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 751 | O << MAI->getWeakDefDirective() << *GVSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 752 | } else if (Subtarget->isTargetCygMing()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 753 | OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global); |
| 754 | O << "\t.linkonce same_size\n"; |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 755 | } else |
| 756 | O << "\t.weak\t" << *GVSym << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 757 | break; |
| 758 | case GlobalValue::DLLExportLinkage: |
| 759 | case GlobalValue::AppendingLinkage: |
| 760 | // FIXME: appending linkage variables should go into a section of |
| 761 | // their name or something. For now, just emit them as external. |
| 762 | case GlobalValue::ExternalLinkage: |
| 763 | // If external or appending, declare as a global symbol |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 764 | OutStreamer.EmitSymbolAttribute(GVSym, MCStreamer::Global); |
| 765 | break; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 766 | case GlobalValue::PrivateLinkage: |
| 767 | case GlobalValue::InternalLinkage: |
| 768 | break; |
| 769 | default: |
| 770 | llvm_unreachable("Unknown linkage type!"); |
| 771 | } |
| 772 | |
| 773 | EmitAlignment(Align, GVar); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 774 | O << *GVSym << ":"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 775 | if (VerboseAsm){ |
| 776 | O.PadToColumn(MAI->getCommentColumn()); |
| 777 | O << MAI->getCommentString() << ' '; |
| 778 | WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent()); |
| 779 | } |
| 780 | O << '\n'; |
| 781 | |
| 782 | EmitGlobalConstant(C); |
| 783 | |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 784 | if (MAI->hasDotTypeDotSizeDirective()) |
| 785 | O << "\t.size\t" << *GVSym << ", " << Size << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 786 | } |
| 787 | |
| 788 | void X86AsmPrinter::EmitEndOfAsmFile(Module &M) { |
| 789 | if (Subtarget->isTargetDarwin()) { |
| 790 | // All darwin targets use mach-o. |
| 791 | TargetLoweringObjectFileMachO &TLOFMacho = |
| 792 | static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering()); |
| 793 | |
| 794 | MachineModuleInfoMachO &MMIMacho = |
| 795 | MMI->getObjFileInfo<MachineModuleInfoMachO>(); |
| 796 | |
| 797 | // Output stubs for dynamically-linked functions. |
| 798 | MachineModuleInfoMachO::SymbolListTy Stubs; |
| 799 | |
| 800 | Stubs = MMIMacho.GetFnStubList(); |
| 801 | if (!Stubs.empty()) { |
| 802 | const MCSection *TheSection = |
| 803 | TLOFMacho.getMachOSection("__IMPORT", "__jump_table", |
| 804 | MCSectionMachO::S_SYMBOL_STUBS | |
| 805 | MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE | |
| 806 | MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, |
| 807 | 5, SectionKind::getMetadata()); |
| 808 | OutStreamer.SwitchSection(TheSection); |
| 809 | |
| 810 | for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 811 | O << *Stubs[i].first << ":\n"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 812 | // Get the MCSymbol without the $stub suffix. |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 813 | O << "\t.indirect_symbol " << *Stubs[i].second; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 814 | O << "\n\thlt ; hlt ; hlt ; hlt ; hlt\n"; |
| 815 | } |
| 816 | O << '\n'; |
| 817 | |
| 818 | Stubs.clear(); |
| 819 | } |
| 820 | |
| 821 | // Output stubs for external and common global variables. |
| 822 | Stubs = MMIMacho.GetGVStubList(); |
| 823 | if (!Stubs.empty()) { |
| 824 | const MCSection *TheSection = |
| 825 | TLOFMacho.getMachOSection("__IMPORT", "__pointers", |
| 826 | MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS, |
| 827 | SectionKind::getMetadata()); |
| 828 | OutStreamer.SwitchSection(TheSection); |
| 829 | |
| 830 | for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 831 | O << *Stubs[i].first << ":\n\t.indirect_symbol " << *Stubs[i].second; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 832 | O << "\n\t.long\t0\n"; |
| 833 | } |
| 834 | Stubs.clear(); |
| 835 | } |
| 836 | |
| 837 | Stubs = MMIMacho.GetHiddenGVStubList(); |
| 838 | if (!Stubs.empty()) { |
| 839 | OutStreamer.SwitchSection(getObjFileLowering().getDataSection()); |
| 840 | EmitAlignment(2); |
| 841 | |
| 842 | for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 843 | O << *Stubs[i].first << ":\n" << MAI->getData32bitsDirective(); |
| 844 | O << *Stubs[i].second << '\n'; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 845 | } |
| 846 | Stubs.clear(); |
| 847 | } |
| 848 | |
| 849 | // Funny Darwin hack: This flag tells the linker that no global symbols |
| 850 | // contain code that falls through to other global symbols (e.g. the obvious |
| 851 | // implementation of multiple entry points). If this doesn't occur, the |
| 852 | // linker can safely perform dead code stripping. Since LLVM never |
| 853 | // generates code that does this, it is always safe to set. |
Chris Lattner | fe284f7 | 2009-10-19 18:03:08 +0000 | [diff] [blame] | 854 | OutStreamer.EmitAssemblerFlag(MCStreamer::SubsectionsViaSymbols); |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 855 | } |
| 856 | |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 857 | if (Subtarget->isTargetCOFF()) { |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 858 | X86COFFMachineModuleInfo &COFFMMI = |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 859 | MMI->getObjFileInfo<X86COFFMachineModuleInfo>(); |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 860 | |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 861 | // Emit type information for external functions |
| 862 | for (X86COFFMachineModuleInfo::stub_iterator I = COFFMMI.stub_begin(), |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 863 | E = COFFMMI.stub_end(); I != E; ++I) { |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 864 | O << "\t.def\t " << I->getKeyData() |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 865 | << ";\t.scl\t" << COFF::C_EXT |
| 866 | << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT) |
| 867 | << ";\t.endef\n"; |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 868 | } |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 869 | |
| 870 | if (Subtarget->isTargetCygMing()) { |
| 871 | // Necessary for dllexport support |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 872 | std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals; |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 873 | |
| 874 | TargetLoweringObjectFileCOFF &TLOFCOFF = |
| 875 | static_cast<TargetLoweringObjectFileCOFF&>(getObjFileLowering()); |
| 876 | |
| 877 | for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) |
| 878 | if (I->hasDLLExportLinkage()) { |
Chris Lattner | b6ed586 | 2010-01-18 00:59:24 +0000 | [diff] [blame^] | 879 | MCSymbol *Sym = GetGlobalValueSymbol(I); |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 880 | COFFMMI.DecorateCygMingName(Sym, OutContext, I, *TM.getTargetData()); |
| 881 | DLLExportedFns.push_back(Sym); |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 882 | } |
| 883 | |
| 884 | for (Module::const_global_iterator I = M.global_begin(), |
| 885 | E = M.global_end(); I != E; ++I) |
Chris Lattner | c53c24c | 2010-01-16 00:51:39 +0000 | [diff] [blame] | 886 | if (I->hasDLLExportLinkage()) |
| 887 | DLLExportedGlobals.push_back(GetGlobalValueSymbol(I)); |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 888 | |
| 889 | // Output linker support code for dllexported globals on windows. |
| 890 | if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) { |
| 891 | OutStreamer.SwitchSection(TLOFCOFF.getCOFFSection(".section .drectve", |
| 892 | true, |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 893 | SectionKind::getMetadata())); |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 894 | for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i) |
| 895 | O << "\t.ascii \" -export:" << *DLLExportedGlobals[i] << ",data\"\n"; |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 896 | |
Chris Lattner | ce40984 | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 897 | for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i) |
| 898 | O << "\t.ascii \" -export:" << *DLLExportedFns[i] << "\"\n"; |
Anton Korobeynikov | d5fcb1d | 2009-10-15 22:36:18 +0000 | [diff] [blame] | 899 | } |
Chris Lattner | bf4b6a8 | 2009-09-20 07:41:30 +0000 | [diff] [blame] | 900 | } |
| 901 | } |
| 902 | } |
| 903 | |
| 904 | |
| 905 | //===----------------------------------------------------------------------===// |
| 906 | // Target Registry Stuff |
| 907 | //===----------------------------------------------------------------------===// |
| 908 | |
| 909 | static MCInstPrinter *createX86MCInstPrinter(const Target &T, |
| 910 | unsigned SyntaxVariant, |
| 911 | const MCAsmInfo &MAI, |
| 912 | raw_ostream &O) { |
| 913 | if (SyntaxVariant == 0) |
| 914 | return new X86ATTInstPrinter(O, MAI); |
| 915 | if (SyntaxVariant == 1) |
| 916 | return new X86IntelInstPrinter(O, MAI); |
| 917 | return 0; |
| 918 | } |
| 919 | |
| 920 | // Force static initialization. |
| 921 | extern "C" void LLVMInitializeX86AsmPrinter() { |
| 922 | RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target); |
| 923 | RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target); |
| 924 | |
| 925 | TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,createX86MCInstPrinter); |
| 926 | TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,createX86MCInstPrinter); |
| 927 | } |