1 //===-- EmitAssembly.cpp - Emit Sparc Specific .s File ---------------------==//
3 // This file implements all of the stuff neccesary to output a .s file from
4 // LLVM. The code in this file assumes that the specified module has already
5 // been compiled into the internal data structures of the Module.
7 // This code largely consists of two LLVM Pass's: a FunctionPass and a Pass.
8 // The FunctionPass is pipelined together with all of the rest of the code
9 // generation stages, and the Pass runs at the end to emit code for global
10 // variables and such.
12 //===----------------------------------------------------------------------===//
14 #include "SparcInternals.h"
15 #include "llvm/CodeGen/MachineInstr.h"
16 #include "llvm/CodeGen/MachineCodeForBasicBlock.h"
17 #include "llvm/CodeGen/MachineCodeForMethod.h"
18 #include "llvm/GlobalVariable.h"
19 #include "llvm/Constants.h"
20 #include "llvm/DerivedTypes.h"
21 #include "llvm/BasicBlock.h"
22 #include "llvm/Function.h"
23 #include "llvm/Module.h"
24 #include "llvm/SlotCalculator.h"
25 #include "llvm/Pass.h"
26 #include "llvm/Assembly/Writer.h"
27 #include "Support/StringExtras.h"
33 class GlobalIdTable: public Annotation {
34 static AnnotationID AnnotId;
35 friend class AsmPrinter; // give access to AnnotId
37 typedef hash_map<const Value*, int> ValIdMap;
38 typedef ValIdMap::const_iterator ValIdMapConstIterator;
39 typedef ValIdMap:: iterator ValIdMapIterator;
41 SlotCalculator Table; // map anonymous values to unique integer IDs
42 ValIdMap valToIdMap; // used for values not handled by SlotCalculator
44 GlobalIdTable(Module* M) : Annotation(AnnotId), Table(M, true) {}
47 AnnotationID GlobalIdTable::AnnotId =
48 AnnotationManager::getID("ASM PRINTER GLOBAL TABLE ANNOT");
50 //===---------------------------------------------------------------------===//
51 // Code Shared By the two printer passes, as a mixin
52 //===---------------------------------------------------------------------===//
55 GlobalIdTable* idTable;
58 const TargetMachine &Target;
68 AsmPrinter(std::ostream &os, const TargetMachine &T)
69 : idTable(0), toAsm(os), Target(T), CurSection(Unknown) {}
71 // (start|end)(Module|Function) - Callback methods to be invoked by subclasses
72 void startModule(Module &M) {
73 // Create the global id table if it does not already exist
74 idTable = (GlobalIdTable*)M.getAnnotation(GlobalIdTable::AnnotId);
75 if (idTable == NULL) {
76 idTable = new GlobalIdTable(&M);
77 M.addAnnotation(idTable);
80 void startFunction(Function &F) {
81 // Make sure the slot table has information about this function...
82 idTable->Table.incorporateFunction(&F);
84 void endFunction(Function &) {
85 idTable->Table.purgeFunction(); // Forget all about F
90 // Check if a value is external or accessible from external code.
91 bool isExternal(const Value* V) {
92 const GlobalValue *GV = dyn_cast<GlobalValue>(V);
93 return GV && GV->hasExternalLinkage();
96 // enterSection - Use this method to enter a different section of the output
97 // executable. This is used to only output neccesary section transitions.
99 void enterSection(enum Sections S) {
100 if (S == CurSection) return; // Only switch section if neccesary
103 toAsm << "\n\t.section ";
106 default: assert(0 && "Bad section name!");
107 case Text: toAsm << "\".text\""; break;
108 case ReadOnlyData: toAsm << "\".rodata\",#alloc"; break;
109 case InitRWData: toAsm << "\".data\",#alloc,#write"; break;
110 case UninitRWData: toAsm << "\".bss\",#alloc,#write\nBbss.bss:"; break;
115 static std::string getValidSymbolName(const string &S) {
118 // Symbol names in Sparc assembly language have these rules:
119 // (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
120 // (b) A name beginning in "." is treated as a local name.
121 // (c) Names beginning with "_" are reserved by ANSI C and shd not be used.
123 if (S[0] == '_' || isdigit(S[0]))
126 for (unsigned i = 0; i < S.size(); ++i)
129 if (C == '_' || C == '.' || C == '$' || isalpha(C) || isdigit(C))
134 Result += char('0' + ((unsigned char)C >> 4));
135 Result += char('0' + (C & 0xF));
141 // getID - Return a valid identifier for the specified value. Base it on
142 // the name of the identifier if possible (qualified by the type), and
143 // use a numbered value based on prefix otherwise.
144 // FPrefix is always prepended to the output identifier.
146 string getID(const Value *V, const char *Prefix, const char *FPrefix = 0) {
147 string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
149 Result += V->hasName() ? V->getName() : string(Prefix);
151 // Qualify all internal names with a unique id.
152 if (!isExternal(V)) {
153 int valId = idTable->Table.getValSlot(V);
155 GlobalIdTable::ValIdMapConstIterator I = idTable->valToIdMap.find(V);
156 if (I == idTable->valToIdMap.end())
157 valId = idTable->valToIdMap[V] = idTable->valToIdMap.size();
161 Result = Result + "_" + itostr(valId);
164 return getValidSymbolName(Result);
167 // getID Wrappers - Ensure consistent usage...
168 string getID(const Function *F) {
169 return getID(F, "LLVMFunction_");
171 string getID(const BasicBlock *BB) {
172 return getID(BB, "LL", (".L_"+getID(BB->getParent())+"_").c_str());
174 string getID(const GlobalVariable *GV) {
175 return getID(GV, "LLVMGlobal_");
177 string getID(const Constant *CV) {
178 return getID(CV, "LLVMConst_", ".C_");
180 string getID(const GlobalValue *GV) {
181 if (const GlobalVariable *V = dyn_cast<GlobalVariable>(GV))
183 else if (const Function *F = dyn_cast<Function>(GV))
185 assert(0 && "Unexpected type of GlobalValue!");
189 // ConstantExprToString() - Convert a ConstantExpr to a C expression, and
190 // return this as a string.
192 std::string ConstantExprToString(const ConstantExpr* CE,
193 const TargetMachine& target) {
196 switch(CE->getOpcode()) {
197 case Instruction::GetElementPtr:
199 const Value* ptrVal = CE->getOperand(0);
200 valToExprString(ptrVal, target, S);
201 std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
202 uint64_t byteOffset =
203 target.DataLayout.getIndexedOffset(ptrVal->getType(), idxVec);
205 const Type *PtrElTy =
206 cast<PointerType>(ptrVal->getType())->getElementType();
207 uint64_t eltSize = target.DataLayout.getTypeSize(PtrElTy);
209 S += " + " + utostr(byteOffset / eltSize);
214 assert(0 && "Unsupported operator in ConstantExprToString()");
221 // valToExprString - Helper function for ConstantExprToString().
222 // Appends result to argument string S.
224 void valToExprString(const Value* V, const TargetMachine& target,
227 if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
229 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
230 S += std::string(CB == ConstantBool::True ? "1" : "0");
231 else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
232 S += itostr(CI->getValue());
233 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
234 S += utostr(CI->getValue());
235 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
236 S += ftostr(CFP->getValue());
237 else if (isa<ConstantPointerNull>(CV))
239 else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
240 valToExprString(CPR->getValue(), target, S);
241 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
242 S += ConstantExprToString(CE, target);
246 } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
253 assert(0 && "Cannot convert value to string");
254 S += "<illegal-value>";
262 //===----------------------------------------------------------------------===//
263 // SparcFunctionAsmPrinter Code
264 //===----------------------------------------------------------------------===//
266 struct SparcFunctionAsmPrinter : public FunctionPass, public AsmPrinter {
267 inline SparcFunctionAsmPrinter(std::ostream &os, const TargetMachine &t)
268 : AsmPrinter(os, t) {}
270 const char *getPassName() const {
271 return "Output Sparc Assembly for Functions";
274 virtual bool doInitialization(Module &M) {
279 virtual bool runOnFunction(Function &F) {
286 virtual bool doFinalization(Module &M) {
291 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
292 AU.setPreservesAll();
295 void emitFunction(const Function &F);
297 void emitBasicBlock(const BasicBlock *BB);
298 void emitMachineInst(const MachineInstr *MI);
300 unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
301 void printOneOperand(const MachineOperand &Op);
303 bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
304 bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
306 unsigned getOperandMask(unsigned Opcode) {
308 case SUBcc: return 1 << 3; // Remove CC argument
309 //case BA: return 1 << 0; // Remove Arg #0, which is always null or xcc
310 default: return 0; // By default, don't hack operands...
316 SparcFunctionAsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
317 unsigned int opNum) {
318 switch (MI->getOpCode()) {
320 case JMPLRET: return (opNum == 0);
321 default: return false;
327 SparcFunctionAsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
328 unsigned int opNum) {
329 if (Target.getInstrInfo().isLoad(MI->getOpCode()))
331 else if (Target.getInstrInfo().isStore(MI->getOpCode()))
338 #define PrintOp1PlusOp2(mop1, mop2) \
339 printOneOperand(mop1); \
341 printOneOperand(mop2);
344 SparcFunctionAsmPrinter::printOperands(const MachineInstr *MI,
347 const MachineOperand& mop = MI->getOperand(opNum);
349 if (OpIsBranchTargetLabel(MI, opNum))
351 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
354 else if (OpIsMemoryAddressBase(MI, opNum))
357 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
363 printOneOperand(mop);
370 SparcFunctionAsmPrinter::printOneOperand(const MachineOperand &mop)
372 bool needBitsFlag = true;
374 if (mop.opHiBits32())
376 else if (mop.opLoBits32())
378 else if (mop.opHiBits64())
380 else if (mop.opLoBits64())
383 needBitsFlag = false;
385 switch (mop.getOperandType())
387 case MachineOperand::MO_VirtualRegister:
388 case MachineOperand::MO_CCRegister:
389 case MachineOperand::MO_MachineRegister:
391 int RegNum = (int)mop.getAllocatedRegNum();
393 // better to print code with NULL registers than to die
394 if (RegNum == Target.getRegInfo().getInvalidRegNum()) {
395 toAsm << "<NULL VALUE>";
397 toAsm << "%" << Target.getRegInfo().getUnifiedRegName(RegNum);
402 case MachineOperand::MO_PCRelativeDisp:
404 const Value *Val = mop.getVRegValue();
405 assert(Val && "\tNULL Value in SparcFunctionAsmPrinter");
407 if (const BasicBlock *BB = dyn_cast<const BasicBlock>(Val))
409 else if (const Function *M = dyn_cast<Function>(Val))
411 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
413 else if (const Constant *CV = dyn_cast<Constant>(Val))
416 assert(0 && "Unrecognized value in SparcFunctionAsmPrinter");
420 case MachineOperand::MO_SignExtendedImmed:
421 toAsm << mop.getImmedValue();
424 case MachineOperand::MO_UnextendedImmed:
425 toAsm << (uint64_t) mop.getImmedValue();
429 toAsm << mop; // use dump field
439 SparcFunctionAsmPrinter::emitMachineInst(const MachineInstr *MI)
441 unsigned Opcode = MI->getOpCode();
443 if (TargetInstrDescriptors[Opcode].iclass & M_DUMMY_PHI_FLAG)
444 return; // IGNORE PHI NODES
446 toAsm << "\t" << TargetInstrDescriptors[Opcode].opCodeString << "\t";
448 unsigned Mask = getOperandMask(Opcode);
450 bool NeedComma = false;
452 for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
453 if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
454 if (NeedComma) toAsm << ", "; // Handle comma outputing
456 N = printOperands(MI, OpNum);
465 SparcFunctionAsmPrinter::emitBasicBlock(const BasicBlock *BB)
467 // Emit a label for the basic block
468 toAsm << getID(BB) << ":\n";
470 // Get the vector of machine instructions corresponding to this bb.
471 const MachineCodeForBasicBlock &MIs = MachineCodeForBasicBlock::get(BB);
472 MachineCodeForBasicBlock::const_iterator MII = MIs.begin(), MIE = MIs.end();
474 // Loop over all of the instructions in the basic block...
475 for (; MII != MIE; ++MII)
476 emitMachineInst(*MII);
477 toAsm << "\n"; // Seperate BB's with newlines
481 SparcFunctionAsmPrinter::emitFunction(const Function &F)
483 string methName = getID(&F);
484 toAsm << "!****** Outputing Function: " << methName << " ******\n";
485 enterSection(AsmPrinter::Text);
486 toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
487 //toAsm << "\t.type\t" << methName << ",#function\n";
488 toAsm << "\t.type\t" << methName << ", 2\n";
489 toAsm << methName << ":\n";
491 // Output code for all of the basic blocks in the function...
492 for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I)
495 // Output a .size directive so the debugger knows the extents of the function
496 toAsm << ".EndOf_" << methName << ":\n\t.size "
497 << methName << ", .EndOf_"
498 << methName << "-" << methName << "\n";
500 // Put some spaces between the functions
504 } // End anonymous namespace
506 Pass *UltraSparc::getFunctionAsmPrinterPass(PassManager &PM, std::ostream &Out){
507 return new SparcFunctionAsmPrinter(Out, *this);
514 //===----------------------------------------------------------------------===//
515 // SparcFunctionAsmPrinter Code
516 //===----------------------------------------------------------------------===//
520 class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
522 SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
523 : AsmPrinter(os, t) {}
525 const char *getPassName() const { return "Output Sparc Assembly for Module"; }
527 virtual bool run(Module &M) {
529 emitGlobalsAndConstants(M);
534 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
535 AU.setPreservesAll();
539 void emitGlobalsAndConstants(const Module &M);
541 void printGlobalVariable(const GlobalVariable *GV);
542 void printSingleConstant( const Constant* CV);
543 void printConstantValueOnly(const Constant* CV);
544 void printConstant( const Constant* CV, std::string valID = "");
546 static void FoldConstants(const Module &M,
547 hash_set<const Constant*> &moduleConstants);
551 // Can we treat the specified array as a string? Only if it is an array of
552 // ubytes or non-negative sbytes.
554 static bool isStringCompatible(const ConstantArray *CPA) {
555 const Type *ETy = cast<ArrayType>(CPA->getType())->getElementType();
556 if (ETy == Type::UByteTy) return true;
557 if (ETy != Type::SByteTy) return false;
559 for (unsigned i = 0; i < CPA->getNumOperands(); ++i)
560 if (cast<ConstantSInt>(CPA->getOperand(i))->getValue() < 0)
566 // toOctal - Convert the low order bits of X into an octal letter
567 static inline char toOctal(int X) {
571 // getAsCString - Return the specified array as a C compatible string, only if
572 // the predicate isStringCompatible is true.
574 static string getAsCString(const ConstantArray *CPA) {
575 assert(isStringCompatible(CPA) && "Array is not string compatible!");
578 const Type *ETy = cast<ArrayType>(CPA->getType())->getElementType();
580 for (unsigned i = 0; i < CPA->getNumOperands(); ++i) {
581 unsigned char C = (ETy == Type::SByteTy) ?
582 (unsigned char)cast<ConstantSInt>(CPA->getOperand(i))->getValue() :
583 (unsigned char)cast<ConstantUInt>(CPA->getOperand(i))->getValue();
587 } else if (isprint(C)) {
591 case '\a': Result += "\\a"; break;
592 case '\b': Result += "\\b"; break;
593 case '\f': Result += "\\f"; break;
594 case '\n': Result += "\\n"; break;
595 case '\r': Result += "\\r"; break;
596 case '\t': Result += "\\t"; break;
597 case '\v': Result += "\\v"; break;
600 Result += toOctal(C >> 6);
601 Result += toOctal(C >> 3);
602 Result += toOctal(C >> 0);
613 ArrayTypeIsString(const ArrayType* arrayType)
615 return (arrayType->getElementType() == Type::UByteTy ||
616 arrayType->getElementType() == Type::SByteTy);
621 TypeToDataDirective(const Type* type)
623 switch(type->getPrimitiveID())
625 case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
627 case Type::UShortTyID: case Type::ShortTyID:
629 case Type::UIntTyID: case Type::IntTyID:
631 case Type::ULongTyID: case Type::LongTyID: case Type::PointerTyID:
633 case Type::FloatTyID:
635 case Type::DoubleTyID:
637 case Type::ArrayTyID:
638 if (ArrayTypeIsString((ArrayType*) type))
641 return "<InvaliDataTypeForPrinting>";
643 return "<InvaliDataTypeForPrinting>";
647 // Get the size of the constant for the given target.
648 // If this is an unsized array, return 0.
651 ConstantToSize(const Constant* CV, const TargetMachine& target)
653 if (const ConstantArray* CPA = dyn_cast<ConstantArray>(CV))
655 const ArrayType *aty = cast<ArrayType>(CPA->getType());
656 if (ArrayTypeIsString(aty))
657 return 1 + CPA->getNumOperands();
660 return target.findOptimalStorageSize(CV->getType());
665 // Align data larger than one L1 cache line on L1 cache line boundaries.
666 // Align all smaller data on the next higher 2^x boundary (4, 8, ...).
669 SizeToAlignment(unsigned int size, const TargetMachine& target)
671 unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
672 if (size > (unsigned) cacheLineSize / 2)
673 return cacheLineSize;
675 for (unsigned sz=1; /*no condition*/; sz *= 2)
680 // Get the size of the type and then use SizeToAlignment.
683 TypeToAlignment(const Type* type, const TargetMachine& target)
685 return SizeToAlignment(target.findOptimalStorageSize(type), target);
688 // Get the size of the constant and then use SizeToAlignment.
689 // Handles strings as a special case;
691 ConstantToAlignment(const Constant* CV, const TargetMachine& target)
693 if (const ConstantArray* CPA = dyn_cast<ConstantArray>(CV))
694 if (ArrayTypeIsString(cast<ArrayType>(CPA->getType())))
695 return SizeToAlignment(1 + CPA->getNumOperands(), target);
697 return TypeToAlignment(CV->getType(), target);
701 // Print a single constant value.
703 SparcModuleAsmPrinter::printSingleConstant(const Constant* CV)
705 assert(CV->getType() != Type::VoidTy &&
706 CV->getType() != Type::TypeTy &&
707 CV->getType() != Type::LabelTy &&
708 "Unexpected type for Constant");
710 assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
711 && "Aggregate types should be handled outside this function");
713 toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
715 if (CV->getType()->isPrimitiveType())
717 if (CV->getType()->isFloatingPoint()) {
718 // FP Constants are printed as integer constants to avoid losing
720 double Val = cast<ConstantFP>(CV)->getValue();
721 if (CV->getType() == Type::FloatTy) {
722 float FVal = (float)Val;
723 char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
724 toAsm << *(unsigned int*)ProxyPtr;
725 } else if (CV->getType() == Type::DoubleTy) {
726 char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
727 toAsm << *(uint64_t*)ProxyPtr;
729 assert(0 && "Unknown floating point type!");
732 toAsm << "\t! " << CV->getType()->getDescription()
733 << " value: " << Val << "\n";
735 WriteAsOperand(toAsm, CV, false, false) << "\n";
738 else if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV))
739 { // This is a constant address for a global variable or method.
740 // Use the name of the variable or method as the address value.
741 toAsm << getID(CPR->getValue()) << "\n";
743 else if (isa<ConstantPointerNull>(CV))
744 { // Null pointer value
747 else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV))
748 { // Constant expression built from operators, constants, and symbolic addrs
749 toAsm << ConstantExprToString(CE, Target) << "\n";
753 assert(0 && "Unknown elementary type for constant");
757 // Print a constant value or values (it may be an aggregate).
758 // Uses printSingleConstant() to print each individual value.
760 SparcModuleAsmPrinter::printConstantValueOnly(const Constant* CV)
762 const ConstantArray *CPA = dyn_cast<ConstantArray>(CV);
764 if (CPA && isStringCompatible(CPA))
765 { // print the string alone and return
766 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CPA) << "\n";
769 { // Not a string. Print the values in successive locations
770 const std::vector<Use> &constValues = CPA->getValues();
771 for (unsigned i=0; i < constValues.size(); i++)
772 printConstantValueOnly(cast<Constant>(constValues[i].get()));
774 else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(CV))
775 { // Print the fields in successive locations
776 const std::vector<Use>& constValues = CPS->getValues();
777 for (unsigned i=0; i < constValues.size(); i++)
778 printConstantValueOnly(cast<Constant>(constValues[i].get()));
781 printSingleConstant(CV);
784 // Print a constant (which may be an aggregate) prefixed by all the
785 // appropriate directives. Uses printConstantValueOnly() to print the
788 SparcModuleAsmPrinter::printConstant(const Constant* CV, string valID)
790 if (valID.length() == 0)
793 toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
795 // Print .size and .type only if it is not a string.
796 const ConstantArray *CPA = dyn_cast<ConstantArray>(CV);
797 if (CPA && isStringCompatible(CPA))
798 { // print it as a string and return
799 toAsm << valID << ":\n";
800 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CPA) << "\n";
804 toAsm << "\t.type" << "\t" << valID << ",#object\n";
806 unsigned int constSize = ConstantToSize(CV, Target);
808 toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
810 toAsm << valID << ":\n";
812 printConstantValueOnly(CV);
816 void SparcModuleAsmPrinter::FoldConstants(const Module &M,
817 hash_set<const Constant*> &MC) {
818 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
819 if (!I->isExternal()) {
820 const hash_set<const Constant*> &pool =
821 MachineCodeForMethod::get(I).getConstantPoolValues();
822 MC.insert(pool.begin(), pool.end());
826 void SparcModuleAsmPrinter::printGlobalVariable(const GlobalVariable* GV)
828 toAsm << "\t.global\t" << getID(GV) << "\n";
830 if (GV->hasInitializer())
831 printConstant(GV->getInitializer(), getID(GV));
833 toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
835 toAsm << "\t.type\t" << getID(GV) << ",#object\n";
836 toAsm << "\t.reserve\t" << getID(GV) << ","
837 << Target.findOptimalStorageSize(GV->getType()->getElementType())
843 void SparcModuleAsmPrinter::emitGlobalsAndConstants(const Module &M) {
844 // First, get the constants there were marked by the code generator for
845 // inclusion in the assembly code data area and fold them all into a
846 // single constant pool since there may be lots of duplicates. Also,
847 // lets force these constants into the slot table so that we can get
848 // unique names for unnamed constants also.
850 hash_set<const Constant*> moduleConstants;
851 FoldConstants(M, moduleConstants);
853 // Output constants spilled to memory
854 enterSection(AsmPrinter::ReadOnlyData);
855 for (hash_set<const Constant*>::const_iterator I = moduleConstants.begin(),
856 E = moduleConstants.end(); I != E; ++I)
859 // Output global variables...
860 for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI) {
861 if (GI->hasInitializer() && GI->isConstant()) {
862 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
863 } else if (GI->hasInitializer() && !GI->isConstant()) { // read-write data
864 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
865 } else if (GI->hasInitializer() && !GI->isConstant()) { // read-write data
866 enterSection(AsmPrinter::InitRWData);
868 assert (!GI->hasInitializer() && "Unexpected global variable type found");
869 enterSection(AsmPrinter::UninitRWData); // Uninitialized data
871 printGlobalVariable(GI);
877 } // End anonymous namespace
879 Pass *UltraSparc::getModuleAsmPrinterPass(PassManager &PM, std::ostream &Out) {
880 return new SparcModuleAsmPrinter(Out, *this);