PPCAsmPrinter.cpp revision 841d12d9ac489ec33d933af96d77dd4fc2a4cee2
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/MachineConstantPool.h" 29#include "llvm/CodeGen/MachineFunctionPass.h" 30#include "llvm/CodeGen/MachineInstr.h" 31#include "llvm/CodeGen/ValueTypes.h" 32#include "llvm/Support/Mangler.h" 33#include "llvm/Support/MathExtras.h" 34#include "llvm/Support/CommandLine.h" 35#include "llvm/Support/Debug.h" 36#include "llvm/Target/MRegisterInfo.h" 37#include "llvm/Target/TargetInstrInfo.h" 38#include "llvm/ADT/Statistic.h" 39#include "llvm/ADT/StringExtras.h" 40#include <set> 41using namespace llvm; 42 43namespace { 44 Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed"); 45 46 struct PPCAsmPrinter : public AsmPrinter { 47 std::set<std::string> FnStubs, GVStubs, LinkOnceStubs; 48 49 PPCAsmPrinter(std::ostream &O, TargetMachine &TM) 50 : AsmPrinter(O, TM), LabelNumber(0) {} 51 52 /// Unique incrementer for label values for referencing Global values. 53 /// 54 unsigned LabelNumber; 55 56 virtual const char *getPassName() const { 57 return "PowerPC Assembly Printer"; 58 } 59 60 PPCTargetMachine &getTM() { 61 return static_cast<PPCTargetMachine&>(TM); 62 } 63 64 unsigned enumRegToMachineReg(unsigned enumReg) { 65 switch (enumReg) { 66 default: assert(0 && "Unhandled register!"); break; 67 case PPC::CR0: return 0; 68 case PPC::CR1: return 1; 69 case PPC::CR2: return 2; 70 case PPC::CR3: return 3; 71 case PPC::CR4: return 4; 72 case PPC::CR5: return 5; 73 case PPC::CR6: return 6; 74 case PPC::CR7: return 7; 75 } 76 abort(); 77 } 78 79 /// printInstruction - This method is automatically generated by tablegen 80 /// from the instruction set description. This method returns true if the 81 /// machine instruction was sufficiently described to print it, otherwise it 82 /// returns false. 83 bool printInstruction(const MachineInstr *MI); 84 85 void printMachineInstruction(const MachineInstr *MI); 86 void printOp(const MachineOperand &MO, bool IsCallOp = false); 87 88 void printOperand(const MachineInstr *MI, unsigned OpNo, MVT::ValueType VT){ 89 const MachineOperand &MO = MI->getOperand(OpNo); 90 if (MO.getType() == MachineOperand::MO_MachineRegister) { 91 assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??"); 92 O << TM.getRegisterInfo()->get(MO.getReg()).Name; 93 } else if (MO.isImmediate()) { 94 O << MO.getImmedValue(); 95 } else { 96 printOp(MO); 97 } 98 } 99 100 void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo, 101 MVT::ValueType VT) { 102 unsigned char value = MI->getOperand(OpNo).getImmedValue(); 103 assert(value <= 31 && "Invalid u5imm argument!"); 104 O << (unsigned int)value; 105 } 106 void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo, 107 MVT::ValueType VT) { 108 unsigned char value = MI->getOperand(OpNo).getImmedValue(); 109 assert(value <= 63 && "Invalid u6imm argument!"); 110 O << (unsigned int)value; 111 } 112 void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo, 113 MVT::ValueType VT) { 114 O << (short)MI->getOperand(OpNo).getImmedValue(); 115 } 116 void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo, 117 MVT::ValueType VT) { 118 O << (unsigned short)MI->getOperand(OpNo).getImmedValue(); 119 } 120 void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo, 121 MVT::ValueType VT) { 122 O << (short)MI->getOperand(OpNo).getImmedValue()*4; 123 } 124 void printBranchOperand(const MachineInstr *MI, unsigned OpNo, 125 MVT::ValueType VT) { 126 // Branches can take an immediate operand. This is used by the branch 127 // selection pass to print $+8, an eight byte displacement from the PC. 128 if (MI->getOperand(OpNo).isImmediate()) { 129 O << "$+" << MI->getOperand(OpNo).getImmedValue(); 130 } else { 131 printOp(MI->getOperand(OpNo), 132 TM.getInstrInfo()->isCall(MI->getOpcode())); 133 } 134 } 135 void printPICLabel(const MachineInstr *MI, unsigned OpNo, 136 MVT::ValueType VT) { 137 // FIXME: should probably be converted to cout.width and cout.fill 138 O << "\"L0000" << LabelNumber << "$pb\"\n"; 139 O << "\"L0000" << LabelNumber << "$pb\":"; 140 } 141 void printSymbolHi(const MachineInstr *MI, unsigned OpNo, 142 MVT::ValueType VT) { 143 if (MI->getOperand(OpNo).isImmediate()) { 144 printS16ImmOperand(MI, OpNo, VT); 145 } else { 146 O << "ha16("; 147 printOp(MI->getOperand(OpNo)); 148 if (PICEnabled) 149 O << "-\"L0000" << LabelNumber << "$pb\")"; 150 else 151 O << ')'; 152 } 153 } 154 void printSymbolLo(const MachineInstr *MI, unsigned OpNo, 155 MVT::ValueType VT) { 156 if (MI->getOperand(OpNo).isImmediate()) { 157 printS16ImmOperand(MI, OpNo, VT); 158 } else { 159 O << "lo16("; 160 printOp(MI->getOperand(OpNo)); 161 if (PICEnabled) 162 O << "-\"L0000" << LabelNumber << "$pb\")"; 163 else 164 O << ')'; 165 } 166 } 167 void printcrbitm(const MachineInstr *MI, unsigned OpNo, 168 MVT::ValueType VT) { 169 unsigned CCReg = MI->getOperand(OpNo).getReg(); 170 unsigned RegNo = enumRegToMachineReg(CCReg); 171 O << (0x80 >> RegNo); 172 } 173 174 virtual void printConstantPool(MachineConstantPool *MCP) = 0; 175 virtual bool runOnMachineFunction(MachineFunction &F) = 0; 176 virtual bool doFinalization(Module &M) = 0; 177 }; 178 179 /// DarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac OS 180 /// X 181 /// 182 struct DarwinAsmPrinter : public PPCAsmPrinter { 183 184 DarwinAsmPrinter(std::ostream &O, TargetMachine &TM) 185 : PPCAsmPrinter(O, TM) { 186 CommentString = ";"; 187 GlobalPrefix = "_"; 188 ZeroDirective = "\t.space\t"; // ".space N" emits N zeros. 189 Data64bitsDirective = 0; // we can't emit a 64-bit unit 190 AlignmentIsInBytes = false; // Alignment is by power of 2. 191 } 192 193 virtual const char *getPassName() const { 194 return "Darwin PPC Assembly Printer"; 195 } 196 197 void printConstantPool(MachineConstantPool *MCP); 198 bool runOnMachineFunction(MachineFunction &F); 199 bool doInitialization(Module &M); 200 bool doFinalization(Module &M); 201 }; 202 203 /// AIXAsmPrinter - PowerPC assembly printer, customized for AIX 204 /// 205 struct AIXAsmPrinter : public PPCAsmPrinter { 206 /// Map for labels corresponding to global variables 207 /// 208 std::map<const GlobalVariable*,std::string> GVToLabelMap; 209 210 AIXAsmPrinter(std::ostream &O, TargetMachine &TM) 211 : PPCAsmPrinter(O, TM) { 212 CommentString = "#"; 213 GlobalPrefix = "_"; 214 ZeroDirective = "\t.space\t"; // ".space N" emits N zeros. 215 Data64bitsDirective = 0; // we can't emit a 64-bit unit 216 AlignmentIsInBytes = false; // Alignment is by power of 2. 217 } 218 219 virtual const char *getPassName() const { 220 return "AIX PPC Assembly Printer"; 221 } 222 223 void printConstantPool(MachineConstantPool *MCP); 224 bool runOnMachineFunction(MachineFunction &F); 225 bool doInitialization(Module &M); 226 bool doFinalization(Module &M); 227 }; 228} // end of anonymous namespace 229 230// SwitchSection - Switch to the specified section of the executable if we are 231// not already in it! 232// 233static void SwitchSection(std::ostream &OS, std::string &CurSection, 234 const char *NewSection) { 235 if (CurSection != NewSection) { 236 CurSection = NewSection; 237 if (!CurSection.empty()) 238 OS << "\t" << NewSection << "\n"; 239 } 240} 241 242/// createDarwinAsmPrinterPass - Returns a pass that prints the PPC assembly 243/// code for a MachineFunction to the given output stream, in a format that the 244/// Darwin assembler can deal with. 245/// 246FunctionPass *llvm::createDarwinAsmPrinter(std::ostream &o, TargetMachine &tm) { 247 return new DarwinAsmPrinter(o, tm); 248} 249 250/// createAIXAsmPrinterPass - Returns a pass that prints the PPC assembly code 251/// for a MachineFunction to the given output stream, in a format that the 252/// AIX 5L assembler can deal with. 253/// 254FunctionPass *llvm::createAIXAsmPrinter(std::ostream &o, TargetMachine &tm) { 255 return new AIXAsmPrinter(o, tm); 256} 257 258// Include the auto-generated portion of the assembly writer 259#include "PPCGenAsmWriter.inc" 260 261void PPCAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) { 262 const MRegisterInfo &RI = *TM.getRegisterInfo(); 263 int new_symbol; 264 265 switch (MO.getType()) { 266 case MachineOperand::MO_VirtualRegister: 267 if (Value *V = MO.getVRegValueOrNull()) { 268 O << "<" << V->getName() << ">"; 269 return; 270 } 271 // FALLTHROUGH 272 case MachineOperand::MO_MachineRegister: 273 case MachineOperand::MO_CCRegister: 274 O << RI.get(MO.getReg()).Name; 275 return; 276 277 case MachineOperand::MO_SignExtendedImmed: 278 case MachineOperand::MO_UnextendedImmed: 279 std::cerr << "printOp() does not handle immediate values\n"; 280 abort(); 281 return; 282 283 case MachineOperand::MO_PCRelativeDisp: 284 std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs"; 285 abort(); 286 return; 287 288 case MachineOperand::MO_MachineBasicBlock: { 289 MachineBasicBlock *MBBOp = MO.getMachineBasicBlock(); 290 O << "LBB" << Mang->getValueName(MBBOp->getParent()->getFunction()) 291 << "_" << MBBOp->getNumber() << "\t; " 292 << MBBOp->getBasicBlock()->getName(); 293 return; 294 } 295 296 case MachineOperand::MO_ConstantPoolIndex: 297 O << ".CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex(); 298 return; 299 300 case MachineOperand::MO_ExternalSymbol: 301 if (IsCallOp) { 302 std::string Name(GlobalPrefix); Name += MO.getSymbolName(); 303 FnStubs.insert(Name); 304 O << "L" << Name << "$stub"; 305 return; 306 } 307 O << GlobalPrefix << MO.getSymbolName(); 308 return; 309 310 case MachineOperand::MO_GlobalAddress: { 311 GlobalValue *GV = MO.getGlobal(); 312 std::string Name = Mang->getValueName(GV); 313 314 // Dynamically-resolved functions need a stub for the function. Be 315 // wary however not to output $stub for external functions whose addresses 316 // are taken. Those should be emitted as $non_lazy_ptr below. 317 Function *F = dyn_cast<Function>(GV); 318 if (F && IsCallOp && F->isExternal()) { 319 FnStubs.insert(Name); 320 O << "L" << Name << "$stub"; 321 return; 322 } 323 324 // External or weakly linked global variables need non-lazily-resolved stubs 325 if ((GV->isExternal() || GV->hasWeakLinkage() || GV->hasLinkOnceLinkage())){ 326 if (GV->hasLinkOnceLinkage()) 327 LinkOnceStubs.insert(Name); 328 else 329 GVStubs.insert(Name); 330 O << "L" << Name << "$non_lazy_ptr"; 331 return; 332 } 333 334 O << Mang->getValueName(GV); 335 return; 336 } 337 338 default: 339 O << "<unknown operand type: " << MO.getType() << ">"; 340 return; 341 } 342} 343 344/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to 345/// the current output stream. 346/// 347void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) { 348 ++EmittedInsts; 349 350 // Check for slwi/srwi mnemonics. 351 if (MI->getOpcode() == PPC::RLWINM) { 352 bool FoundMnemonic = false; 353 unsigned char SH = MI->getOperand(2).getImmedValue(); 354 unsigned char MB = MI->getOperand(3).getImmedValue(); 355 unsigned char ME = MI->getOperand(4).getImmedValue(); 356 if (SH <= 31 && MB == 0 && ME == (31-SH)) { 357 O << "slwi "; FoundMnemonic = true; 358 } 359 if (SH <= 31 && MB == (32-SH) && ME == 31) { 360 O << "srwi "; FoundMnemonic = true; 361 SH = 32-SH; 362 } 363 if (FoundMnemonic) { 364 printOperand(MI, 0, MVT::i64); 365 O << ", "; 366 printOperand(MI, 1, MVT::i64); 367 O << ", " << (unsigned int)SH << "\n"; 368 return; 369 } 370 } 371 372 if (printInstruction(MI)) 373 return; // Printer was automatically generated 374 375 assert(0 && "Unhandled instruction in asm writer!"); 376 abort(); 377 return; 378} 379 380/// runOnMachineFunction - This uses the printMachineInstruction() 381/// method to print assembly for each instruction. 382/// 383bool DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) { 384 setupMachineFunction(MF); 385 O << "\n\n"; 386 387 // Print out constants referenced by the function 388 printConstantPool(MF.getConstantPool()); 389 390 // Print out labels for the function. 391 O << "\t.text\n"; 392 emitAlignment(4); 393 O << "\t.globl\t" << CurrentFnName << "\n"; 394 O << CurrentFnName << ":\n"; 395 396 // Print out code for the function. 397 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); 398 I != E; ++I) { 399 // Print a label for the basic block. 400 if (I != MF.begin()) { 401 O << "LBB" << CurrentFnName << "_" << I->getNumber() << ":\t"; 402 if (!I->getBasicBlock()->getName().empty()) 403 O << CommentString << " " << I->getBasicBlock()->getName(); 404 O << "\n"; 405 } 406 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); 407 II != E; ++II) { 408 // Print the assembly for the instruction. 409 O << "\t"; 410 printMachineInstruction(II); 411 } 412 } 413 ++LabelNumber; 414 415 // We didn't modify anything. 416 return false; 417} 418 419/// printConstantPool - Print to the current output stream assembly 420/// representations of the constants in the constant pool MCP. This is 421/// used to print out constants which have been "spilled to memory" by 422/// the code generator. 423/// 424void DarwinAsmPrinter::printConstantPool(MachineConstantPool *MCP) { 425 const std::vector<Constant*> &CP = MCP->getConstants(); 426 const TargetData &TD = TM.getTargetData(); 427 428 if (CP.empty()) return; 429 430 for (unsigned i = 0, e = CP.size(); i != e; ++i) { 431 O << "\t.const\n"; 432 // FIXME: force doubles to be naturally aligned. We should handle this 433 // more correctly in the future. 434 if (Type::DoubleTy == CP[i]->getType()) 435 emitAlignment(3); 436 else 437 emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType())); 438 O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString 439 << *CP[i] << "\n"; 440 emitGlobalConstant(CP[i]); 441 } 442} 443 444bool DarwinAsmPrinter::doInitialization(Module &M) { 445 if (TM.getSubtarget<PPCSubtarget>().isGigaProcessor()) 446 O << "\t.machine ppc970\n"; 447 AsmPrinter::doInitialization(M); 448 return false; 449} 450 451bool DarwinAsmPrinter::doFinalization(Module &M) { 452 const TargetData &TD = TM.getTargetData(); 453 std::string CurSection; 454 455 // Print out module-level global variables here. 456 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I) 457 if (I->hasInitializer()) { // External global require no code 458 O << '\n'; 459 std::string name = Mang->getValueName(I); 460 Constant *C = I->getInitializer(); 461 unsigned Size = TD.getTypeSize(C->getType()); 462 unsigned Align = TD.getTypeAlignmentShift(C->getType()); 463 464 if (C->isNullValue() && /* FIXME: Verify correct */ 465 (I->hasInternalLinkage() || I->hasWeakLinkage() || 466 I->hasLinkOnceLinkage())) { 467 SwitchSection(O, CurSection, ".data"); 468 if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. 469 if (I->hasInternalLinkage()) 470 O << ".lcomm " << name << "," << Size << "," << Align; 471 else 472 O << ".comm " << name << "," << Size; 473 O << "\t\t; '" << I->getName() << "'\n"; 474 } else { 475 switch (I->getLinkage()) { 476 case GlobalValue::LinkOnceLinkage: 477 O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n" 478 << ".weak_definition " << name << '\n' 479 << ".private_extern " << name << '\n' 480 << ".section __DATA,__datacoal_nt,coalesced,no_toc\n"; 481 LinkOnceStubs.insert(name); 482 break; 483 case GlobalValue::WeakLinkage: 484 O << ".weak_definition " << name << '\n' 485 << ".private_extern " << name << '\n'; 486 break; 487 case GlobalValue::AppendingLinkage: 488 // FIXME: appending linkage variables should go into a section of 489 // their name or something. For now, just emit them as external. 490 case GlobalValue::ExternalLinkage: 491 // If external or appending, declare as a global symbol 492 O << "\t.globl " << name << "\n"; 493 // FALL THROUGH 494 case GlobalValue::InternalLinkage: 495 SwitchSection(O, CurSection, ".data"); 496 break; 497 case GlobalValue::GhostLinkage: 498 std::cerr << "Error: unmaterialized (GhostLinkage) function in asm!"; 499 abort(); 500 } 501 502 emitAlignment(Align); 503 O << name << ":\t\t\t\t; '" << I->getName() << "'\n"; 504 emitGlobalConstant(C); 505 } 506 } 507 508 // Output stubs for dynamically-linked functions 509 for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end(); 510 i != e; ++i) 511 { 512 if (PICEnabled) { 513 O << ".data\n"; 514 O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n"; 515 emitAlignment(2); 516 O << "L" << *i << "$stub:\n"; 517 O << "\t.indirect_symbol " << *i << "\n"; 518 O << "\tmflr r0\n"; 519 O << "\tbcl 20,31,L0$" << *i << "\n"; 520 O << "L0$" << *i << ":\n"; 521 O << "\tmflr r11\n"; 522 O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n"; 523 O << "\tmtlr r0\n"; 524 O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n"; 525 O << "\tmtctr r12\n"; 526 O << "\tbctr\n"; 527 O << ".data\n"; 528 O << ".lazy_symbol_pointer\n"; 529 O << "L" << *i << "$lazy_ptr:\n"; 530 O << "\t.indirect_symbol " << *i << "\n"; 531 O << "\t.long dyld_stub_binding_helper\n"; 532 } else { 533 O << "\t.section __TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16\n"; 534 emitAlignment(4); 535 O << "L" << *i << "$stub:\n"; 536 O << "\t.indirect_symbol " << *i << "\n"; 537 O << "\tlis r11,ha16(L" << *i << "$lazy_ptr)\n"; 538 O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr)(r11)\n"; 539 O << "\tmtctr r12\n"; 540 O << "\tbctr\n"; 541 O << "\t.lazy_symbol_pointer\n"; 542 O << "L" << *i << "$lazy_ptr:\n"; 543 O << "\t.indirect_symbol " << *i << "\n"; 544 O << "\t.long dyld_stub_binding_helper\n"; 545 } 546 } 547 548 O << "\n"; 549 550 // Output stubs for external global variables 551 if (GVStubs.begin() != GVStubs.end()) 552 O << ".data\n.non_lazy_symbol_pointer\n"; 553 for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end(); 554 i != e; ++i) { 555 O << "L" << *i << "$non_lazy_ptr:\n"; 556 O << "\t.indirect_symbol " << *i << "\n"; 557 O << "\t.long\t0\n"; 558 } 559 560 // Output stubs for link-once variables 561 if (LinkOnceStubs.begin() != LinkOnceStubs.end()) 562 O << ".data\n.align 2\n"; 563 for (std::set<std::string>::iterator i = LinkOnceStubs.begin(), 564 e = LinkOnceStubs.end(); i != e; ++i) { 565 O << "L" << *i << "$non_lazy_ptr:\n" 566 << "\t.long\t" << *i << '\n'; 567 } 568 569 AsmPrinter::doFinalization(M); 570 return false; // success 571} 572 573/// runOnMachineFunction - This uses the printMachineInstruction() 574/// method to print assembly for each instruction. 575/// 576bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) { 577 CurrentFnName = MF.getFunction()->getName(); 578 579 // Print out constants referenced by the function 580 printConstantPool(MF.getConstantPool()); 581 582 // Print out header for the function. 583 O << "\t.csect .text[PR]\n" 584 << "\t.align 2\n" 585 << "\t.globl " << CurrentFnName << '\n' 586 << "\t.globl ." << CurrentFnName << '\n' 587 << "\t.csect " << CurrentFnName << "[DS],3\n" 588 << CurrentFnName << ":\n" 589 << "\t.llong ." << CurrentFnName << ", TOC[tc0], 0\n" 590 << "\t.csect .text[PR]\n" 591 << '.' << CurrentFnName << ":\n"; 592 593 // Print out code for the function. 594 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); 595 I != E; ++I) { 596 // Print a label for the basic block. 597 O << "LBB" << CurrentFnName << "_" << I->getNumber() << ":\t# " 598 << I->getBasicBlock()->getName() << "\n"; 599 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); 600 II != E; ++II) { 601 // Print the assembly for the instruction. 602 O << "\t"; 603 printMachineInstruction(II); 604 } 605 } 606 ++LabelNumber; 607 608 O << "LT.." << CurrentFnName << ":\n" 609 << "\t.long 0\n" 610 << "\t.byte 0,0,32,65,128,0,0,0\n" 611 << "\t.long LT.." << CurrentFnName << "-." << CurrentFnName << '\n' 612 << "\t.short 3\n" 613 << "\t.byte \"" << CurrentFnName << "\"\n" 614 << "\t.align 2\n"; 615 616 // We didn't modify anything. 617 return false; 618} 619 620/// printConstantPool - Print to the current output stream assembly 621/// representations of the constants in the constant pool MCP. This is 622/// used to print out constants which have been "spilled to memory" by 623/// the code generator. 624/// 625void AIXAsmPrinter::printConstantPool(MachineConstantPool *MCP) { 626 const std::vector<Constant*> &CP = MCP->getConstants(); 627 const TargetData &TD = TM.getTargetData(); 628 629 if (CP.empty()) return; 630 631 for (unsigned i = 0, e = CP.size(); i != e; ++i) { 632 O << "\t.const\n"; 633 O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType()) 634 << "\n"; 635 O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t;" 636 << *CP[i] << "\n"; 637 emitGlobalConstant(CP[i]); 638 } 639} 640 641bool AIXAsmPrinter::doInitialization(Module &M) { 642 const TargetData &TD = TM.getTargetData(); 643 std::string CurSection; 644 645 O << "\t.machine \"ppc64\"\n" 646 << "\t.toc\n" 647 << "\t.csect .text[PR]\n"; 648 649 // Print out module-level global variables 650 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 651 I != E; ++I) { 652 if (!I->hasInitializer()) 653 continue; 654 655 std::string Name = I->getName(); 656 Constant *C = I->getInitializer(); 657 // N.B.: We are defaulting to writable strings 658 if (I->hasExternalLinkage()) { 659 O << "\t.globl " << Name << '\n' 660 << "\t.csect .data[RW],3\n"; 661 } else { 662 O << "\t.csect _global.rw_c[RW],3\n"; 663 } 664 O << Name << ":\n"; 665 emitGlobalConstant(C); 666 } 667 668 // Output labels for globals 669 if (M.global_begin() != M.global_end()) O << "\t.toc\n"; 670 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 671 I != E; ++I) { 672 const GlobalVariable *GV = I; 673 // Do not output labels for unused variables 674 if (GV->isExternal() && GV->use_begin() == GV->use_end()) 675 continue; 676 677 std::string Name = GV->getName(); 678 std::string Label = "LC.." + utostr(LabelNumber++); 679 GVToLabelMap[GV] = Label; 680 O << Label << ":\n" 681 << "\t.tc " << Name << "[TC]," << Name; 682 if (GV->isExternal()) O << "[RW]"; 683 O << '\n'; 684 } 685 686 Mang = new Mangler(M, "."); 687 return false; // success 688} 689 690bool AIXAsmPrinter::doFinalization(Module &M) { 691 const TargetData &TD = TM.getTargetData(); 692 // Print out module-level global variables 693 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); 694 I != E; ++I) { 695 if (I->hasInitializer() || I->hasExternalLinkage()) 696 continue; 697 698 std::string Name = I->getName(); 699 if (I->hasInternalLinkage()) { 700 O << "\t.lcomm " << Name << ",16,_global.bss_c"; 701 } else { 702 O << "\t.comm " << Name << "," << TD.getTypeSize(I->getType()) 703 << "," << Log2_32((unsigned)TD.getTypeAlignment(I->getType())); 704 } 705 O << "\t\t# "; 706 WriteAsOperand(O, I, false, true, &M); 707 O << "\n"; 708 } 709 710 O << "_section_.text:\n" 711 << "\t.csect .data[RW],3\n" 712 << "\t.llong _section_.text\n"; 713 714 delete Mang; 715 return false; // success 716} 717