1 //===-- EmitAssembly.cpp - Emit SparcV9 Specific .s File -------------------==//
3 // The LLVM Compiler Infrastructure
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.
8 //===----------------------------------------------------------------------===//
10 // This file implements all of the stuff necessary to output a .s file from
11 // LLVM. The code in this file assumes that the specified module has already
12 // been compiled into the internal data structures of the Module.
14 // This code largely consists of two LLVM Pass's: a FunctionPass and a Pass.
15 // The FunctionPass is pipelined together with all of the rest of the code
16 // generation stages, and the Pass runs at the end to emit code for global
17 // variables and such.
19 //===----------------------------------------------------------------------===//
21 #include "llvm/Constants.h"
22 #include "llvm/DerivedTypes.h"
23 #include "llvm/Module.h"
24 #include "llvm/Pass.h"
25 #include "llvm/Assembly/Writer.h"
26 #include "llvm/CodeGen/MachineConstantPool.h"
27 #include "llvm/CodeGen/MachineFunction.h"
28 #include "llvm/CodeGen/MachineFunctionInfo.h"
29 #include "llvm/CodeGen/MachineInstr.h"
30 #include "llvm/Support/Mangler.h"
31 #include "Support/StringExtras.h"
32 #include "Support/Statistic.h"
33 #include "SparcV9Internals.h"
38 Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
40 //===--------------------------------------------------------------------===//
43 /// getAsCString - Return the specified array as a C compatible string, only
44 /// if the predicate isString() is true.
46 std::string getAsCString(const ConstantArray *CVA) {
47 assert(CVA->isString() && "Array is not string compatible!");
49 std::string Result = "\"";
50 for (unsigned i = 0; i != CVA->getNumOperands(); ++i) {
51 unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
55 } else if (C == '\\') {
57 } else if (isprint(C)) {
60 Result += '\\'; // print all other chars as octal value
61 // Convert C to octal representation
62 Result += ((C >> 6) & 7) + '0';
63 Result += ((C >> 3) & 7) + '0';
64 Result += ((C >> 0) & 7) + '0';
72 inline bool ArrayTypeIsString(const ArrayType* arrayType) {
73 return (arrayType->getElementType() == Type::UByteTy ||
74 arrayType->getElementType() == Type::SByteTy);
77 unsigned findOptimalStorageSize(const TargetMachine &TM, const Type *Ty) {
78 // All integer types smaller than ints promote to 4 byte integers.
79 if (Ty->isIntegral() && Ty->getPrimitiveSize() < 4)
82 return TM.getTargetData().getTypeSize(Ty);
86 inline const std::string
87 TypeToDataDirective(const Type* type) {
88 switch(type->getTypeID()) {
89 case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
91 case Type::UShortTyID: case Type::ShortTyID:
93 case Type::UIntTyID: case Type::IntTyID:
95 case Type::ULongTyID: case Type::LongTyID: case Type::PointerTyID:
99 case Type::DoubleTyID:
101 case Type::ArrayTyID:
102 if (ArrayTypeIsString((ArrayType*) type))
105 return "<InvaliDataTypeForPrinting>";
107 return "<InvaliDataTypeForPrinting>";
111 /// Get the size of the constant for the given target.
112 /// If this is an unsized array, return 0.
115 ConstantToSize(const Constant* CV, const TargetMachine& target) {
116 if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV)) {
117 const ArrayType *aty = cast<ArrayType>(CVA->getType());
118 if (ArrayTypeIsString(aty))
119 return 1 + CVA->getNumOperands();
122 return findOptimalStorageSize(target, CV->getType());
125 /// Align data larger than one L1 cache line on L1 cache line boundaries.
126 /// Align all smaller data on the next higher 2^x boundary (4, 8, ...).
129 SizeToAlignment(unsigned int size, const TargetMachine& target) {
130 const unsigned short cacheLineSize = 16;
131 if (size > (unsigned) cacheLineSize / 2)
132 return cacheLineSize;
134 for (unsigned sz=1; /*no condition*/; sz *= 2)
139 /// Get the size of the type and then use SizeToAlignment.
142 TypeToAlignment(const Type* type, const TargetMachine& target) {
143 return SizeToAlignment(findOptimalStorageSize(target, type), target);
146 /// Get the size of the constant and then use SizeToAlignment.
147 /// Handles strings as a special case;
149 ConstantToAlignment(const Constant* CV, const TargetMachine& target) {
150 if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
151 if (ArrayTypeIsString(cast<ArrayType>(CVA->getType())))
152 return SizeToAlignment(1 + CVA->getNumOperands(), target);
154 return TypeToAlignment(CV->getType(), target);
157 } // End anonymous namespace
161 //===---------------------------------------------------------------------===//
162 // Code abstracted away from the AsmPrinter
163 //===---------------------------------------------------------------------===//
167 // Mangle symbol names appropriately
172 const TargetMachine &Target;
182 AsmPrinter(std::ostream &os, const TargetMachine &T)
183 : /* idTable(0), */ toAsm(os), Target(T), CurSection(Unknown) {}
189 // (start|end)(Module|Function) - Callback methods invoked by subclasses
190 void startModule(Module &M) {
191 Mang = new Mangler(M);
194 void PrintZeroBytesToPad(int numBytes) {
196 // Always use single unsigned bytes for padding. We don't know upon
197 // what data size the beginning address is aligned, so using anything
198 // other than a byte may cause alignment errors in the assembler.
201 printSingleConstantValue(Constant::getNullValue(Type::UByteTy));
204 /// Print a single constant value.
206 void printSingleConstantValue(const Constant* CV);
208 /// Print a constant value or values (it may be an aggregate).
209 /// Uses printSingleConstantValue() to print each individual value.
211 void printConstantValueOnly(const Constant* CV, int numPadBytesAfter = 0);
213 // Print a constant (which may be an aggregate) prefixed by all the
214 // appropriate directives. Uses printConstantValueOnly() to print the
216 void printConstant(const Constant* CV, std::string valID = "") {
217 if (valID.length() == 0)
220 toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
222 // Print .size and .type only if it is not a string.
223 if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
224 if (CVA->isString()) {
225 // print it as a string and return
226 toAsm << valID << ":\n";
227 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
231 toAsm << "\t.type" << "\t" << valID << ",#object\n";
233 unsigned int constSize = ConstantToSize(CV, Target);
235 toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
237 toAsm << valID << ":\n";
239 printConstantValueOnly(CV);
242 // enterSection - Use this method to enter a different section of the output
243 // executable. This is used to only output necessary section transitions.
245 void enterSection(enum Sections S) {
246 if (S == CurSection) return; // Only switch section if necessary
249 toAsm << "\n\t.section ";
252 default: assert(0 && "Bad section name!");
253 case Text: toAsm << "\".text\""; break;
254 case ReadOnlyData: toAsm << "\".rodata\",#alloc"; break;
255 case InitRWData: toAsm << "\".data\",#alloc,#write"; break;
256 case ZeroInitRWData: toAsm << "\".bss\",#alloc,#write"; break;
261 // getID Wrappers - Ensure consistent usage
262 // Symbol names in SparcV9 assembly language have these rules:
263 // (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
264 // (b) A name beginning in "." is treated as a local name.
265 std::string getID(const Function *F) {
266 return Mang->getValueName(F);
268 std::string getID(const BasicBlock *BB) {
269 return ".L_" + getID(BB->getParent()) + "_" + Mang->getValueName(BB);
271 std::string getID(const GlobalVariable *GV) {
272 return Mang->getValueName(GV);
274 std::string getID(const Constant *CV) {
275 return ".C_" + Mang->getValueName(CV);
277 std::string getID(const GlobalValue *GV) {
278 if (const GlobalVariable *V = dyn_cast<GlobalVariable>(GV))
280 else if (const Function *F = dyn_cast<Function>(GV))
282 assert(0 && "Unexpected type of GlobalValue!");
286 // Combines expressions
287 inline std::string ConstantArithExprToString(const ConstantExpr* CE,
288 const TargetMachine &TM,
289 const std::string &op) {
290 return "(" + valToExprString(CE->getOperand(0), TM) + op
291 + valToExprString(CE->getOperand(1), TM) + ")";
294 /// ConstantExprToString() - Convert a ConstantExpr to an asm expression
295 /// and return this as a string.
297 std::string ConstantExprToString(const ConstantExpr* CE,
298 const TargetMachine& target);
300 /// valToExprString - Helper function for ConstantExprToString().
301 /// Appends result to argument string S.
303 std::string valToExprString(const Value* V, const TargetMachine& target);
305 } // End anonymous namespace
308 /// Print a single constant value.
310 void AsmPrinter::printSingleConstantValue(const Constant* CV) {
311 assert(CV->getType() != Type::VoidTy &&
312 CV->getType() != Type::LabelTy &&
313 "Unexpected type for Constant");
315 assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
316 && "Aggregate types should be handled outside this function");
318 toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
320 if (const GlobalValue* GV = dyn_cast<GlobalValue>(CV)) {
321 toAsm << getID(GV) << "\n";
322 } else if (isa<ConstantPointerNull>(CV)) {
323 // Null pointer value
325 } else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV)) {
326 // Constant expression built from operators, constants, and symbolic addrs
327 toAsm << ConstantExprToString(CE, Target) << "\n";
328 } else if (CV->getType()->isPrimitiveType()) {
329 // Check primitive types last
330 if (CV->getType()->isFloatingPoint()) {
331 // FP Constants are printed as integer constants to avoid losing
333 double Val = cast<ConstantFP>(CV)->getValue();
334 if (CV->getType() == Type::FloatTy) {
335 float FVal = (float)Val;
336 char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
337 toAsm << *(unsigned int*)ProxyPtr;
338 } else if (CV->getType() == Type::DoubleTy) {
339 char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
340 toAsm << *(uint64_t*)ProxyPtr;
342 assert(0 && "Unknown floating point type!");
345 toAsm << "\t! " << CV->getType()->getDescription()
346 << " value: " << Val << "\n";
347 } else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
348 toAsm << (int)CB->getValue() << "\n";
350 WriteAsOperand(toAsm, CV, false, false) << "\n";
353 assert(0 && "Unknown elementary type for constant");
357 /// Print a constant value or values (it may be an aggregate).
358 /// Uses printSingleConstantValue() to print each individual value.
360 void AsmPrinter::printConstantValueOnly(const Constant* CV,
361 int numPadBytesAfter) {
362 if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
363 if (CVA->isString()) {
364 // print the string alone and return
365 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
367 // Not a string. Print the values in successive locations
368 const std::vector<Use> &constValues = CVA->getValues();
369 for (unsigned i=0; i < constValues.size(); i++)
370 printConstantValueOnly(cast<Constant>(constValues[i].get()));
372 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
373 // Print the fields in successive locations. Pad to align if needed!
374 const StructLayout *cvsLayout =
375 Target.getTargetData().getStructLayout(CVS->getType());
376 const std::vector<Use>& constValues = CVS->getValues();
377 unsigned sizeSoFar = 0;
378 for (unsigned i=0, N = constValues.size(); i < N; i++) {
379 const Constant* field = cast<Constant>(constValues[i].get());
381 // Check if padding is needed and insert one or more 0s.
383 Target.getTargetData().getTypeSize(field->getType());
384 int padSize = ((i == N-1? cvsLayout->StructSize
385 : cvsLayout->MemberOffsets[i+1])
386 - cvsLayout->MemberOffsets[i]) - fieldSize;
387 sizeSoFar += (fieldSize + padSize);
389 // Now print the actual field value
390 printConstantValueOnly(field, padSize);
392 assert(sizeSoFar == cvsLayout->StructSize &&
393 "Layout of constant struct may be incorrect!");
394 } else if (isa<ConstantAggregateZero>(CV)) {
395 PrintZeroBytesToPad(Target.getTargetData().getTypeSize(CV->getType()));
397 printSingleConstantValue(CV);
399 if (numPadBytesAfter)
400 PrintZeroBytesToPad(numPadBytesAfter);
403 /// ConstantExprToString() - Convert a ConstantExpr to an asm expression
404 /// and return this as a string.
406 std::string AsmPrinter::ConstantExprToString(const ConstantExpr* CE,
407 const TargetMachine& target) {
409 switch(CE->getOpcode()) {
410 case Instruction::GetElementPtr:
411 { // generate a symbolic expression for the byte address
412 const Value* ptrVal = CE->getOperand(0);
413 std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
414 const TargetData &TD = target.getTargetData();
415 S += "(" + valToExprString(ptrVal, target) + ") + ("
416 + utostr(TD.getIndexedOffset(ptrVal->getType(),idxVec)) + ")";
420 case Instruction::Cast:
421 // Support only non-converting casts for now, i.e., a no-op.
422 // This assertion is not a complete check.
423 assert(target.getTargetData().getTypeSize(CE->getType()) ==
424 target.getTargetData().getTypeSize(CE->getOperand(0)->getType()));
425 S += "(" + valToExprString(CE->getOperand(0), target) + ")";
428 case Instruction::Add:
429 S += ConstantArithExprToString(CE, target, ") + (");
432 case Instruction::Sub:
433 S += ConstantArithExprToString(CE, target, ") - (");
436 case Instruction::Mul:
437 S += ConstantArithExprToString(CE, target, ") * (");
440 case Instruction::Div:
441 S += ConstantArithExprToString(CE, target, ") / (");
444 case Instruction::Rem:
445 S += ConstantArithExprToString(CE, target, ") % (");
448 case Instruction::And:
449 // Logical && for booleans; bitwise & otherwise
450 S += ConstantArithExprToString(CE, target,
451 ((CE->getType() == Type::BoolTy)? ") && (" : ") & ("));
454 case Instruction::Or:
455 // Logical || for booleans; bitwise | otherwise
456 S += ConstantArithExprToString(CE, target,
457 ((CE->getType() == Type::BoolTy)? ") || (" : ") | ("));
460 case Instruction::Xor:
461 // Bitwise ^ for all types
462 S += ConstantArithExprToString(CE, target, ") ^ (");
466 assert(0 && "Unsupported operator in ConstantExprToString()");
473 /// valToExprString - Helper function for ConstantExprToString().
474 /// Appends result to argument string S.
476 std::string AsmPrinter::valToExprString(const Value* V,
477 const TargetMachine& target) {
480 if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
482 } else if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
483 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
484 S += std::string(CB == ConstantBool::True ? "1" : "0");
485 else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
486 S += itostr(CI->getValue());
487 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
488 S += utostr(CI->getValue());
489 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
490 S += ftostr(CFP->getValue());
491 else if (isa<ConstantPointerNull>(CV))
493 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
494 S += ConstantExprToString(CE, target);
501 assert(0 && "Cannot convert value to string");
502 S += "<illegal-value>";
508 //===----------------------------------------------------------------------===//
509 // SparcV9AsmPrinter Code
510 //===----------------------------------------------------------------------===//
514 struct SparcV9AsmPrinter : public FunctionPass, public AsmPrinter {
515 inline SparcV9AsmPrinter(std::ostream &os, const TargetMachine &t)
516 : AsmPrinter(os, t) {}
518 const Function *currFunction;
520 const char *getPassName() const {
521 return "Output SparcV9 Assembly for Functions";
524 virtual bool doInitialization(Module &M) {
529 virtual bool runOnFunction(Function &F) {
535 virtual bool doFinalization(Module &M) {
540 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
541 AU.setPreservesAll();
544 void emitFunction(const Function &F);
546 void emitBasicBlock(const MachineBasicBlock &MBB);
547 void emitMachineInst(const MachineInstr *MI);
549 unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
550 void printOneOperand(const MachineOperand &Op, MachineOpCode opCode);
552 bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
553 bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
555 unsigned getOperandMask(unsigned Opcode) {
558 case V9::SUBcci: return 1 << 3; // Remove CC argument
559 default: return 0; // By default, don't hack operands...
563 void emitGlobals(const Module &M);
564 void printGlobalVariable(const GlobalVariable *GV);
567 } // End anonymous namespace
570 SparcV9AsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
571 unsigned int opNum) {
572 switch (MI->getOpcode()) {
584 SparcV9AsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
585 unsigned int opNum) {
586 if (Target.getInstrInfo()->isLoad(MI->getOpcode()))
588 else if (Target.getInstrInfo()->isStore(MI->getOpcode()))
595 #define PrintOp1PlusOp2(mop1, mop2, opCode) \
596 printOneOperand(mop1, opCode); \
598 printOneOperand(mop2, opCode);
601 SparcV9AsmPrinter::printOperands(const MachineInstr *MI,
604 const MachineOperand& mop = MI->getOperand(opNum);
606 if (OpIsBranchTargetLabel(MI, opNum)) {
607 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpcode());
609 } else if (OpIsMemoryAddressBase(MI, opNum)) {
611 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpcode());
615 printOneOperand(mop, MI->getOpcode());
621 SparcV9AsmPrinter::printOneOperand(const MachineOperand &mop,
622 MachineOpCode opCode)
624 bool needBitsFlag = true;
626 if (mop.isHiBits32())
628 else if (mop.isLoBits32())
630 else if (mop.isHiBits64())
632 else if (mop.isLoBits64())
635 needBitsFlag = false;
637 switch (mop.getType())
639 case MachineOperand::MO_VirtualRegister:
640 case MachineOperand::MO_CCRegister:
641 case MachineOperand::MO_MachineRegister:
643 int regNum = (int)mop.getReg();
645 if (regNum == Target.getRegInfo()->getInvalidRegNum()) {
646 // better to print code with NULL registers than to die
647 toAsm << "<NULL VALUE>";
649 toAsm << "%" << Target.getRegInfo()->getUnifiedRegName(regNum);
654 case MachineOperand::MO_ConstantPoolIndex:
656 toAsm << ".CPI_" << getID(currFunction)
657 << "_" << mop.getConstantPoolIndex();
661 case MachineOperand::MO_PCRelativeDisp:
663 const Value *Val = mop.getVRegValue();
664 assert(Val && "\tNULL Value in SparcV9AsmPrinter");
666 if (const BasicBlock *BB = dyn_cast<BasicBlock>(Val))
668 else if (const Function *F = dyn_cast<Function>(Val))
670 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
672 else if (const Constant *CV = dyn_cast<Constant>(Val))
675 assert(0 && "Unrecognized value in SparcV9AsmPrinter");
679 case MachineOperand::MO_SignExtendedImmed:
680 toAsm << mop.getImmedValue();
683 case MachineOperand::MO_UnextendedImmed:
684 toAsm << (uint64_t) mop.getImmedValue();
688 toAsm << mop; // use dump field
696 void SparcV9AsmPrinter::emitMachineInst(const MachineInstr *MI) {
697 unsigned Opcode = MI->getOpcode();
699 if (Target.getInstrInfo()->isDummyPhiInstr(Opcode))
700 return; // IGNORE PHI NODES
702 toAsm << "\t" << Target.getInstrInfo()->getName(Opcode) << "\t";
704 unsigned Mask = getOperandMask(Opcode);
706 bool NeedComma = false;
708 for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
709 if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
710 if (NeedComma) toAsm << ", "; // Handle comma outputting
712 N = printOperands(MI, OpNum);
720 void SparcV9AsmPrinter::emitBasicBlock(const MachineBasicBlock &MBB) {
721 // Emit a label for the basic block
722 toAsm << getID(MBB.getBasicBlock()) << ":\n";
724 // Loop over all of the instructions in the basic block...
725 for (MachineBasicBlock::const_iterator MII = MBB.begin(), MIE = MBB.end();
727 emitMachineInst(MII);
728 toAsm << "\n"; // Separate BB's with newlines
731 void SparcV9AsmPrinter::emitFunction(const Function &F) {
732 std::string methName = getID(&F);
733 toAsm << "!****** Outputing Function: " << methName << " ******\n";
735 // Emit constant pool for this function
736 const MachineConstantPool *MCP = MachineFunction::get(&F).getConstantPool();
737 const std::vector<Constant*> &CP = MCP->getConstants();
739 enterSection(AsmPrinter::ReadOnlyData);
740 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
741 std::string cpiName = ".CPI_" + methName + "_" + utostr(i);
742 printConstant(CP[i], cpiName);
745 enterSection(AsmPrinter::Text);
746 toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
747 //toAsm << "\t.type\t" << methName << ",#function\n";
748 toAsm << "\t.type\t" << methName << ", 2\n";
749 toAsm << methName << ":\n";
751 // Output code for all of the basic blocks in the function...
752 MachineFunction &MF = MachineFunction::get(&F);
753 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); I != E;++I)
756 // Output a .size directive so the debugger knows the extents of the function
757 toAsm << ".EndOf_" << methName << ":\n\t.size "
758 << methName << ", .EndOf_"
759 << methName << "-" << methName << "\n";
761 // Put some spaces between the functions
765 void SparcV9AsmPrinter::printGlobalVariable(const GlobalVariable* GV) {
766 if (GV->hasExternalLinkage())
767 toAsm << "\t.global\t" << getID(GV) << "\n";
769 if (GV->hasInitializer() && ! GV->getInitializer()->isNullValue()) {
770 printConstant(GV->getInitializer(), getID(GV));
772 toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
774 toAsm << "\t.type\t" << getID(GV) << ",#object\n";
775 toAsm << "\t.reserve\t" << getID(GV) << ","
776 << findOptimalStorageSize(Target, GV->getType()->getElementType())
781 void SparcV9AsmPrinter::emitGlobals(const Module &M) {
782 // Output global variables...
783 for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI)
784 if (! GI->isExternal()) {
785 assert(GI->hasInitializer());
786 if (GI->isConstant())
787 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
788 else if (GI->getInitializer()->isNullValue())
789 enterSection(AsmPrinter::ZeroInitRWData); // read-write zero data
791 enterSection(AsmPrinter::InitRWData); // read-write non-zero data
793 printGlobalVariable(GI);
799 FunctionPass *llvm::createAsmPrinterPass(std::ostream &Out,
800 const TargetMachine &TM) {
801 return new SparcV9AsmPrinter(Out, TM);