PPCAsmPrinter.cpp revision cec26fc3bf1f9d177a4befabd278410f0cb7d2b8
1//===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --------=// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file was developed by the LLVM research group and is distributed under 6// the University of Illinois Open Source License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains a printer that converts from our internal representation 11// of machine-dependent LLVM code to PowerPC assembly language. This printer is 12// the output mechanism used by `llc'. 13// 14// Documentation at http://developer.apple.com/documentation/DeveloperTools/ 15// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html 16// 17//===----------------------------------------------------------------------===// 18 19#define DEBUG_TYPE "asmprinter" 20#include "PPC.h" 21#include "PPCTargetMachine.h" 22#include "PPCSubtarget.h" 23#include "llvm/Constants.h" 24#include "llvm/DerivedTypes.h" 25#include "llvm/Module.h" 26#include "llvm/Assembly/Writer.h" 27#include "llvm/CodeGen/AsmPrinter.h" 28#include "llvm/CodeGen/MachineDebugInfo.h" 29#include "llvm/CodeGen/MachineFunctionPass.h" 30#include "llvm/CodeGen/MachineInstr.h" 31#include "llvm/Support/Mangler.h" 32#include "llvm/Support/MathExtras.h" 33#include "llvm/Support/CommandLine.h" 34#include "llvm/Support/Debug.h" 35#include "llvm/Target/MRegisterInfo.h" 36#include "llvm/Target/TargetInstrInfo.h" 37#include "llvm/ADT/Statistic.h" 38#include "llvm/ADT/StringExtras.h" 39#include <set> 40using namespace llvm; 41 42namespace { 43 Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed"); 44 45 class PPCAsmPrinter : public AsmPrinter { 46 public: 47 std::set<std::string> FnStubs, GVStubs; 48 49 PPCAsmPrinter(std::ostream &O, TargetMachine &TM) 50 : AsmPrinter(O, TM) {} 51 52 virtual const char *getPassName() const { 53 return "PowerPC Assembly Printer"; 54 } 55 56 PPCTargetMachine &getTM() { 57 return static_cast<PPCTargetMachine&>(TM); 58 } 59 60 unsigned enumRegToMachineReg(unsigned enumReg) { 61 switch (enumReg) { 62 default: assert(0 && "Unhandled register!"); break; 63 case PPC::CR0: return 0; 64 case PPC::CR1: return 1; 65 case PPC::CR2: return 2; 66 case PPC::CR3: return 3; 67 case PPC::CR4: return 4; 68 case PPC::CR5: return 5; 69 case PPC::CR6: return 6; 70 case PPC::CR7: return 7; 71 } 72 abort(); 73 } 74 75 /// printInstruction - This method is automatically generated by tablegen 76 /// from the instruction set description. This method returns true if the 77 /// machine instruction was sufficiently described to print it, otherwise it 78 /// returns false. 79 bool printInstruction(const MachineInstr *MI); 80 81 void printMachineInstruction(const MachineInstr *MI); 82 void printOp(const MachineOperand &MO); 83 84 void printOperand(const MachineInstr *MI, unsigned OpNo){ 85 const MachineOperand &MO = MI->getOperand(OpNo); 86 if (MO.getType() == MachineOperand::MO_MachineRegister) { 87 assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??"); 88 O << TM.getRegisterInfo()->get(MO.getReg()).Name; 89 } else if (MO.isImmediate()) { 90 O << MO.getImmedValue(); 91 } else { 92 printOp(MO); 93 } 94 } 95 96 void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo) { 97 unsigned char value = MI->getOperand(OpNo).getImmedValue(); 98 assert(value <= 31 && "Invalid u5imm argument!"); 99 O << (unsigned int)value; 100 } 101 void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo) { 102 unsigned char value = MI->getOperand(OpNo).getImmedValue(); 103 assert(value <= 63 && "Invalid u6imm argument!"); 104 O << (unsigned int)value; 105 } 106 void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo) { 107 O << (short)MI->getOperand(OpNo).getImmedValue(); 108 } 109 void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo) { 110 O << (unsigned short)MI->getOperand(OpNo).getImmedValue(); 111 } 112 void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo) { 113 O << (short)MI->getOperand(OpNo).getImmedValue()*4; 114 } 115 void printBranchOperand(const MachineInstr *MI, unsigned OpNo) { 116 // Branches can take an immediate operand. This is used by the branch 117 // selection pass to print $+8, an eight byte displacement from the PC. 118 if (MI->getOperand(OpNo).isImmediate()) { 119 O << "$+" << MI->getOperand(OpNo).getImmedValue(); 120 } else { 121 printOp(MI->getOperand(OpNo)); 122 } 123 } 124 void printCallOperand(const MachineInstr *MI, unsigned OpNo) { 125 const MachineOperand &MO = MI->getOperand(OpNo); 126 if (!PPCGenerateStaticCode) { 127 if (MO.getType() == MachineOperand::MO_GlobalAddress) { 128 GlobalValue *GV = MO.getGlobal(); 129 if (((GV->isExternal() || GV->hasWeakLinkage() || 130 GV->hasLinkOnceLinkage()))) { 131 // Dynamically-resolved functions need a stub for the function. 132 std::string Name = Mang->getValueName(GV); 133 FnStubs.insert(Name); 134 O << "L" << Name << "$stub"; 135 return; 136 } 137 } 138 if (MO.getType() == MachineOperand::MO_ExternalSymbol) { 139 std::string Name(GlobalPrefix); Name += MO.getSymbolName(); 140 FnStubs.insert(Name); 141 O << "L" << Name << "$stub"; 142 return; 143 } 144 } 145 146 printOp(MI->getOperand(OpNo)); 147 } 148 void printAbsAddrOperand(const MachineInstr *MI, unsigned OpNo) { 149 O << (int)MI->getOperand(OpNo).getImmedValue()*4; 150 } 151 void printPICLabel(const MachineInstr *MI, unsigned OpNo) { 152 O << "\"L" << getFunctionNumber() << "$pb\"\n"; 153 O << "\"L" << getFunctionNumber() << "$pb\":"; 154 } 155 void printSymbolHi(const MachineInstr *MI, unsigned OpNo) { 156 if (MI->getOperand(OpNo).isImmediate()) { 157 printS16ImmOperand(MI, OpNo); 158 } else { 159 O << "ha16("; 160 printOp(MI->getOperand(OpNo)); 161 if (PICEnabled) 162 O << "-\"L" << getFunctionNumber() << "$pb\")"; 163 else 164 O << ')'; 165 } 166 } 167 void printSymbolLo(const MachineInstr *MI, unsigned OpNo) { 168 if (MI->getOperand(OpNo).isImmediate()) { 169 printS16ImmOperand(MI, OpNo); 170 } else { 171 O << "lo16("; 172 printOp(MI->getOperand(OpNo)); 173 if (PICEnabled) 174 O << "-\"L" << getFunctionNumber() << "$pb\")"; 175 else 176 O << ')'; 177 } 178 } 179 void printcrbitm(const MachineInstr *MI, unsigned OpNo) { 180 unsigned CCReg = MI->getOperand(OpNo).getReg(); 181 unsigned RegNo = enumRegToMachineReg(CCReg); 182 O << (0x80 >> RegNo); 183 } 184 // The new addressing mode printers, currently empty 185 void printMemRegImm(const MachineInstr *MI, unsigned OpNo) { 186 printSymbolLo(MI, OpNo); 187 O << '('; 188 printOperand(MI, OpNo+1); 189 O << ')'; 190 } 191 void printMemRegReg(const MachineInstr *MI, unsigned OpNo) { 192 // When used as the base register, r0 reads constant zero rather than 193 // the value contained in the register. For this reason, the darwin 194 // assembler requires that we print r0 as 0 (no r) when used as the base. 195 const MachineOperand &MO = MI->getOperand(OpNo); 196 if (MO.getReg() == PPC::R0) 197 O << '0'; 198 else 199 O << TM.getRegisterInfo()->get(MO.getReg()).Name; 200 O << ", "; 201 printOperand(MI, OpNo+1); 202 } 203 204 virtual bool runOnMachineFunction(MachineFunction &F) = 0; 205 virtual bool doFinalization(Module &M) = 0; 206 }; 207 208 /// DarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac OS 209 /// X 210 /// 211 struct DarwinAsmPrinter : public PPCAsmPrinter { 212 213 DarwinAsmPrinter(std::ostream &O, TargetMachine &TM) 214 : PPCAsmPrinter(O, TM) { 215 CommentString = ";"; 216 GlobalPrefix = "_"; 217 PrivateGlobalPrefix = "L"; // Marker for constant pool idxs 218 ZeroDirective = "\t.space\t"; // ".space N" emits N zeros. 219 Data64bitsDirective = 0; // we can't emit a 64-bit unit 220 AlignmentIsInBytes = false; // Alignment is by power of 2. 221 ConstantPoolSection = "\t.const\t"; 222 LCOMMDirective = "\t.lcomm\t"; 223 StaticCtorsSection = ".mod_init_func"; 224 StaticDtorsSection = ".mod_term_func"; 225 } 226 227 virtual const char *getPassName() const { 228 return "Darwin PPC Assembly Printer"; 229 } 230 231 bool runOnMachineFunction(MachineFunction &F); 232 bool doInitialization(Module &M); 233 bool doFinalization(Module &M); 234 }; 235 236 /// AIXAsmPrinter - PowerPC assembly printer, customized for AIX 237 /// 238 struct AIXAsmPrinter : public PPCAsmPrinter { 239 /// Map for labels corresponding to global variables 240 /// 241 std::map<const GlobalVariable*,std::string> GVToLabelMap; 242 243 AIXAsmPrinter(std::ostream &O, TargetMachine &TM) 244 : PPCAsmPrinter(O, TM) { 245 CommentString = "#"; 246 GlobalPrefix = "."; 247 ZeroDirective = "\t.space\t"; // ".space N" emits N zeros. 248 Data64bitsDirective = 0; // we can't emit a 64-bit unit 249 AlignmentIsInBytes = false; // Alignment is by power of 2. 250 ConstantPoolSection = "\t.const\t"; 251 } 252 253 virtual const char *getPassName() const { 254 return "AIX PPC Assembly Printer"; 255 } 256 257 bool runOnMachineFunction(MachineFunction &F); 258 bool doInitialization(Module &M); 259 bool doFinalization(Module &M); 260 }; 261} // end of anonymous namespace 262 263/// createDarwinAsmPrinterPass - Returns a pass that prints the PPC assembly 264/// code for a MachineFunction to the given output stream, in a format that the 265/// Darwin assembler can deal with. 266/// 267FunctionPass *llvm::createDarwinAsmPrinter(std::ostream &o, TargetMachine &tm) { 268 return new DarwinAsmPrinter(o, tm); 269} 270 271/// createAIXAsmPrinterPass - Returns a pass that prints the PPC assembly code 272/// for a MachineFunction to the given output stream, in a format that the 273/// AIX 5L assembler can deal with. 274/// 275FunctionPass *llvm::createAIXAsmPrinter(std::ostream &o, TargetMachine &tm) { 276 return new AIXAsmPrinter(o, tm); 277} 278 279// Include the auto-generated portion of the assembly writer 280#include "PPCGenAsmWriter.inc" 281 282void PPCAsmPrinter::printOp(const MachineOperand &MO) { 283 const MRegisterInfo &RI = *TM.getRegisterInfo(); 284 int new_symbol; 285 286 switch (MO.getType()) { 287 case MachineOperand::MO_VirtualRegister: 288 if (Value *V = MO.getVRegValueOrNull()) { 289 O << "<" << V->getName() << ">"; 290 return; 291 } 292 // FALLTHROUGH 293 case MachineOperand::MO_MachineRegister: 294 case MachineOperand::MO_CCRegister: 295 O << RI.get(MO.getReg()).Name; 296 return; 297 298 case MachineOperand::MO_SignExtendedImmed: 299 case MachineOperand::MO_UnextendedImmed: 300 std::cerr << "printOp() does not handle immediate values\n"; 301 abort(); 302 return; 303 304 case MachineOperand::MO_PCRelativeDisp: 305 std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs"; 306 abort(); 307 return; 308 309 case MachineOperand::MO_MachineBasicBlock: { 310 MachineBasicBlock *MBBOp = MO.getMachineBasicBlock(); 311 O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << "_" 312 << MBBOp->getNumber() << "\t; " << MBBOp->getBasicBlock()->getName(); 313 return; 314 } 315 316 case MachineOperand::MO_ConstantPoolIndex: 317 O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() 318 << '_' << MO.getConstantPoolIndex(); 319 return; 320 case MachineOperand::MO_ExternalSymbol: 321 // Computing the address of an external symbol, not calling it. 322 if (!PPCGenerateStaticCode) { 323 std::string Name(GlobalPrefix); Name += MO.getSymbolName(); 324 GVStubs.insert(Name); 325 O << "L" << Name << "$non_lazy_ptr"; 326 return; 327 } 328 O << GlobalPrefix << MO.getSymbolName(); 329 return; 330 case MachineOperand::MO_GlobalAddress: { 331 // Computing the address of a global symbol, not calling it. 332 GlobalValue *GV = MO.getGlobal(); 333 std::string Name = Mang->getValueName(GV); 334 335 // External or weakly linked global variables need non-lazily-resolved stubs 336 if (!PPCGenerateStaticCode) { 337 if (((GV->isExternal() || GV->hasWeakLinkage() || 338 GV->hasLinkOnceLinkage()))) { 339 GVStubs.insert(Name); 340 O << "L" << Name << "$non_lazy_ptr"; 341 return; 342 } 343 } 344 345 O << Name; 346 return; 347 } 348 349 default: 350 O << "<unknown operand type: " << MO.getType() << ">"; 351 return; 352 } 353} 354 355/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to 356/// the current output stream. 357/// 358void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) { 359 ++EmittedInsts; 360 361 // Check for slwi/srwi mnemonics. 362 if (MI->getOpcode() == PPC::RLWINM) { 363 bool FoundMnemonic = false; 364 unsigned char SH = MI->getOperand(2).getImmedValue(); 365 unsigned char MB = MI->getOperand(3).getImmedValue(); 366 unsigned char ME = MI->getOperand(4).getImmedValue(); 367 if (SH <= 31 && MB == 0 && ME == (31-SH)) { 368 O << "slwi "; FoundMnemonic = true; 369 } 370 if (SH <= 31 && MB == (32-SH) && ME == 31) { 371 O << "srwi "; FoundMnemonic = true; 372 SH = 32-SH; 373 } 374 if (FoundMnemonic) { 375 printOperand(MI, 0); 376 O << ", "; 377 printOperand(MI, 1); 378 O << ", " << (unsigned int)SH << "\n"; 379 return; 380 } 381 } 382 383 if (printInstruction(MI)) 384 return; // Printer was automatically generated 385 386 assert(0 && "Unhandled instruction in asm writer!"); 387 abort(); 388 return; 389} 390 391 392/// runOnMachineFunction - This uses the printMachineInstruction() 393/// method to print assembly for each instruction. 394/// 395bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) { 396 SetupMachineFunction(MF); 397 O << "\n\n"; 398 399 // Print out dwarf file info 400 MachineDebugInfo &DebugInfo = MF.getDebugInfo(); 401 std::vector<std::string> Sources = DebugInfo.getSourceFiles(); 402 for (unsigned i = 0, N = Sources.size(); i < N; i++) { 403 O << "\t; .file\t" << (i + 1) << "," << "\"" << Sources[i] << "\"" << "\n"; 404 } 405 406 // Print out constants referenced by the function 407 EmitConstantPool(MF.getConstantPool()); 408 409 // Print out labels for the function. 410 const Function *F = MF.getFunction(); 411 switch (F->getLinkage()) { 412 default: assert(0 && "Unknown linkage type!"); 413 case Function::InternalLinkage: // Symbols default to internal. 414 SwitchSection(".text", F); 415 EmitAlignment(4, F); 416 break; 417 case Function::ExternalLinkage: 418 SwitchSection(".text", F); 419 EmitAlignment(4, F); 420 O << "\t.globl\t" << CurrentFnName << "\n"; 421 break; 422 case Function::WeakLinkage: 423 case Function::LinkOnceLinkage: 424 SwitchSection(".section __TEXT,__textcoal_nt,coalesced,pure_instructions", 425 F); 426 O << "\t.globl\t" << CurrentFnName << "\n"; 427 O << "\t.weak_definition\t" << CurrentFnName << "\n"; 428 break; 429 } 430 O << CurrentFnName << ":\n"; 431 432 // Print out code for the function. 433 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); 434 I != E; ++I) { 435 // Print a label for the basic block. 436 if (I != MF.begin()) { 437 O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << '_' 438 << I->getNumber() << ":\t"; 439 if (!I->getBasicBlock()->getName().empty()) 440 O << CommentString << " " << I->getBasicBlock()->getName(); 441 O << "\n"; 442 } 443 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); 444 II != E; ++II) { 445 // Print the assembly for the instruction. 446 O << "\t"; 447 printMachineInstruction(II); 448 } 449 } 450 451 // We didn't modify anything. 452 return false; 453} 454 455 456bool DarwinAsmPrinter::doInitialization(Module &M) { 457 if (TM.getSubtarget<PPCSubtarget>().isGigaProcessor()) 458 O << "\t.machine ppc970\n"; 459 AsmPrinter::doInitialization(M); 460 461 // Darwin wants symbols to be quoted if they have complex names. 462 Mang->setUseQuotes(true); 463 return false; 464} 465 466bool DarwinAsmPrinter::doFinalization(Module &M) { 467 const TargetData &TD = TM.getTargetData(); 468 469 // Print out module-level global variables here. 470 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 471 I != E; ++I) { 472 if (!I->hasInitializer()) continue; // External global require no code 473 474 // Check to see if this is a special global used by LLVM, if so, emit it. 475 if (I->hasAppendingLinkage() && EmitSpecialLLVMGlobal(I)) 476 continue; 477 478 O << '\n'; 479 std::string name = Mang->getValueName(I); 480 Constant *C = I->getInitializer(); 481 unsigned Size = TD.getTypeSize(C->getType()); 482 unsigned Align = TD.getTypeAlignmentShift(C->getType()); 483 484 if (C->isNullValue() && /* FIXME: Verify correct */ 485 (I->hasInternalLinkage() || I->hasWeakLinkage() || 486 I->hasLinkOnceLinkage())) { 487 SwitchSection(".data", I); 488 if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. 489 if (I->hasInternalLinkage()) 490 O << LCOMMDirective << name << "," << Size << "," << Align; 491 else 492 O << ".comm " << name << "," << Size; 493 O << "\t\t; '" << I->getName() << "'\n"; 494 } else { 495 switch (I->getLinkage()) { 496 case GlobalValue::LinkOnceLinkage: 497 case GlobalValue::WeakLinkage: 498 O << "\t.globl " << name << '\n' 499 << "\t.weak_definition " << name << '\n'; 500 SwitchSection(".section __DATA,__datacoal_nt,coalesced", I); 501 break; 502 case GlobalValue::AppendingLinkage: 503 // FIXME: appending linkage variables should go into a section of 504 // their name or something. For now, just emit them as external. 505 case GlobalValue::ExternalLinkage: 506 // If external or appending, declare as a global symbol 507 O << "\t.globl " << name << "\n"; 508 // FALL THROUGH 509 case GlobalValue::InternalLinkage: 510 SwitchSection(".data", I); 511 break; 512 default: 513 std::cerr << "Unknown linkage type!"; 514 abort(); 515 } 516 517 EmitAlignment(Align, I); 518 O << name << ":\t\t\t\t; '" << I->getName() << "'\n"; 519 EmitGlobalConstant(C); 520 } 521 } 522 523 // Output stubs for dynamically-linked functions 524 if (PICEnabled) { 525 for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end(); 526 i != e; ++i) { 527 SwitchSection(".section __TEXT,__picsymbolstub1,symbol_stubs," 528 "pure_instructions,32", 0); 529 EmitAlignment(2); 530 O << "L" << *i << "$stub:\n"; 531 O << "\t.indirect_symbol " << *i << "\n"; 532 O << "\tmflr r0\n"; 533 O << "\tbcl 20,31,L0$" << *i << "\n"; 534 O << "L0$" << *i << ":\n"; 535 O << "\tmflr r11\n"; 536 O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n"; 537 O << "\tmtlr r0\n"; 538 O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n"; 539 O << "\tmtctr r12\n"; 540 O << "\tbctr\n"; 541 SwitchSection(".lazy_symbol_pointer", 0); 542 O << "L" << *i << "$lazy_ptr:\n"; 543 O << "\t.indirect_symbol " << *i << "\n"; 544 O << "\t.long dyld_stub_binding_helper\n"; 545 } 546 } else { 547 for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end(); 548 i != e; ++i) { 549 SwitchSection(".section __TEXT,__symbol_stub1,symbol_stubs," 550 "pure_instructions,16", 0); 551 EmitAlignment(4); 552 O << "L" << *i << "$stub:\n"; 553 O << "\t.indirect_symbol " << *i << "\n"; 554 O << "\tlis r11,ha16(L" << *i << "$lazy_ptr)\n"; 555 O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr)(r11)\n"; 556 O << "\tmtctr r12\n"; 557 O << "\tbctr\n"; 558 SwitchSection(".lazy_symbol_pointer", 0); 559 O << "L" << *i << "$lazy_ptr:\n"; 560 O << "\t.indirect_symbol " << *i << "\n"; 561 O << "\t.long dyld_stub_binding_helper\n"; 562 } 563 } 564 565 O << "\n"; 566 567 // Output stubs for external and common global variables. 568 if (GVStubs.begin() != GVStubs.end()) { 569 SwitchSection(".non_lazy_symbol_pointer", 0); 570 for (std::set<std::string>::iterator I = GVStubs.begin(), 571 E = GVStubs.end(); I != E; ++I) { 572 O << "L" << *I << "$non_lazy_ptr:\n"; 573 O << "\t.indirect_symbol " << *I << "\n"; 574 O << "\t.long\t0\n"; 575 } 576 } 577 578 // Funny Darwin hack: This flag tells the linker that no global symbols 579 // contain code that falls through to other global symbols (e.g. the obvious 580 // implementation of multiple entry points). If this doesn't occur, the 581 // linker can safely perform dead code stripping. Since LLVM never generates 582 // code that does this, it is always safe to set. 583 O << "\t.subsections_via_symbols\n"; 584 585 AsmPrinter::doFinalization(M); 586 return false; // success 587} 588 589/// runOnMachineFunction - This uses the printMachineInstruction() 590/// method to print assembly for each instruction. 591/// 592bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) { 593 SetupMachineFunction(MF); 594 595 // Print out constants referenced by the function 596 EmitConstantPool(MF.getConstantPool()); 597 598 // Print out header for the function. 599 O << "\t.csect .text[PR]\n" 600 << "\t.align 2\n" 601 << "\t.globl " << CurrentFnName << '\n' 602 << "\t.globl ." << CurrentFnName << '\n' 603 << "\t.csect " << CurrentFnName << "[DS],3\n" 604 << CurrentFnName << ":\n" 605 << "\t.llong ." << CurrentFnName << ", TOC[tc0], 0\n" 606 << "\t.csect .text[PR]\n" 607 << '.' << CurrentFnName << ":\n"; 608 609 // Print out code for the function. 610 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); 611 I != E; ++I) { 612 // Print a label for the basic block. 613 O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << '_' 614 << I->getNumber() 615 << ":\t" << CommentString << I->getBasicBlock()->getName() << '\n'; 616 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); 617 II != E; ++II) { 618 // Print the assembly for the instruction. 619 O << "\t"; 620 printMachineInstruction(II); 621 } 622 } 623 624 O << "LT.." << CurrentFnName << ":\n" 625 << "\t.long 0\n" 626 << "\t.byte 0,0,32,65,128,0,0,0\n" 627 << "\t.long LT.." << CurrentFnName << "-." << CurrentFnName << '\n' 628 << "\t.short 3\n" 629 << "\t.byte \"" << CurrentFnName << "\"\n" 630 << "\t.align 2\n"; 631 632 // We didn't modify anything. 633 return false; 634} 635 636bool AIXAsmPrinter::doInitialization(Module &M) { 637 SwitchSection("", 0); 638 const TargetData &TD = TM.getTargetData(); 639 640 O << "\t.machine \"ppc64\"\n" 641 << "\t.toc\n" 642 << "\t.csect .text[PR]\n"; 643 644 // Print out module-level global variables 645 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 646 I != E; ++I) { 647 if (!I->hasInitializer()) 648 continue; 649 650 std::string Name = I->getName(); 651 Constant *C = I->getInitializer(); 652 // N.B.: We are defaulting to writable strings 653 if (I->hasExternalLinkage()) { 654 O << "\t.globl " << Name << '\n' 655 << "\t.csect .data[RW],3\n"; 656 } else { 657 O << "\t.csect _global.rw_c[RW],3\n"; 658 } 659 O << Name << ":\n"; 660 EmitGlobalConstant(C); 661 } 662 663 // Output labels for globals 664 if (M.global_begin() != M.global_end()) O << "\t.toc\n"; 665 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 666 I != E; ++I) { 667 const GlobalVariable *GV = I; 668 // Do not output labels for unused variables 669 if (GV->isExternal() && GV->use_begin() == GV->use_end()) 670 continue; 671 672 IncrementFunctionNumber(); 673 std::string Name = GV->getName(); 674 std::string Label = "LC.." + utostr(getFunctionNumber()); 675 GVToLabelMap[GV] = Label; 676 O << Label << ":\n" 677 << "\t.tc " << Name << "[TC]," << Name; 678 if (GV->isExternal()) O << "[RW]"; 679 O << '\n'; 680 } 681 682 AsmPrinter::doInitialization(M); 683 return false; // success 684} 685 686bool AIXAsmPrinter::doFinalization(Module &M) { 687 const TargetData &TD = TM.getTargetData(); 688 // Print out module-level global variables 689 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 690 I != E; ++I) { 691 if (I->hasInitializer() || I->hasExternalLinkage()) 692 continue; 693 694 std::string Name = I->getName(); 695 if (I->hasInternalLinkage()) { 696 O << "\t.lcomm " << Name << ",16,_global.bss_c"; 697 } else { 698 O << "\t.comm " << Name << "," << TD.getTypeSize(I->getType()) 699 << "," << Log2_32((unsigned)TD.getTypeAlignment(I->getType())); 700 } 701 O << "\t\t" << CommentString << " "; 702 WriteAsOperand(O, I, false, true, &M); 703 O << "\n"; 704 } 705 706 O << "_section_.text:\n" 707 << "\t.csect .data[RW],3\n" 708 << "\t.llong _section_.text\n"; 709 AsmPrinter::doFinalization(M); 710 return false; // success 711} 712