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->copyOperands();
202 idxVec.erase(idxVec.begin());
203 uint64_t byteOffset = target.DataLayout.getIndexedOffset(ptrVal->getType(),
205 uint64_t eltSize = target.DataLayout.getTypeSize(
206 cast<PointerType>(ptrVal->getType())->getElementType());
207 S += " + " + utostr(byteOffset / eltSize);
212 assert(0 && "Unsupported operator in ConstantExprToString()");
219 // valToExprString - Helper function for ConstantExprToString().
220 // Appends result to argument string S.
222 void valToExprString(const Value* V, const TargetMachine& target,
225 if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
227 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
228 S += std::string(CB == ConstantBool::True ? "1" : "0");
229 else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
230 S += itostr(CI->getValue());
231 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
232 S += utostr(CI->getValue());
233 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
234 S += ftostr(CFP->getValue());
235 else if (isa<ConstantPointerNull>(CV))
237 else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
238 valToExprString(CPR->getValue(), target, S);
239 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
240 S += ConstantExprToString(CE, target);
244 } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
251 assert(0 && "Cannot convert value to string");
252 S += "<illegal-value>";
260 //===----------------------------------------------------------------------===//
261 // SparcFunctionAsmPrinter Code
262 //===----------------------------------------------------------------------===//
264 struct SparcFunctionAsmPrinter : public FunctionPass, public AsmPrinter {
265 inline SparcFunctionAsmPrinter(std::ostream &os, const TargetMachine &t)
266 : AsmPrinter(os, t) {}
268 const char *getPassName() const {
269 return "Output Sparc Assembly for Functions";
272 virtual bool doInitialization(Module &M) {
277 virtual bool runOnFunction(Function &F) {
284 virtual bool doFinalization(Module &M) {
289 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
290 AU.setPreservesAll();
293 void emitFunction(const Function &F);
295 void emitBasicBlock(const BasicBlock *BB);
296 void emitMachineInst(const MachineInstr *MI);
298 unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
299 void printOneOperand(const MachineOperand &Op);
301 bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
302 bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
304 unsigned getOperandMask(unsigned Opcode) {
306 case SUBcc: return 1 << 3; // Remove CC argument
307 //case BA: return 1 << 0; // Remove Arg #0, which is always null or xcc
308 default: return 0; // By default, don't hack operands...
314 SparcFunctionAsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
315 unsigned int opNum) {
316 switch (MI->getOpCode()) {
318 case JMPLRET: return (opNum == 0);
319 default: return false;
325 SparcFunctionAsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
326 unsigned int opNum) {
327 if (Target.getInstrInfo().isLoad(MI->getOpCode()))
329 else if (Target.getInstrInfo().isStore(MI->getOpCode()))
336 #define PrintOp1PlusOp2(mop1, mop2) \
337 printOneOperand(mop1); \
339 printOneOperand(mop2);
342 SparcFunctionAsmPrinter::printOperands(const MachineInstr *MI,
345 const MachineOperand& mop = MI->getOperand(opNum);
347 if (OpIsBranchTargetLabel(MI, opNum))
349 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
352 else if (OpIsMemoryAddressBase(MI, opNum))
355 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
361 printOneOperand(mop);
368 SparcFunctionAsmPrinter::printOneOperand(const MachineOperand &mop)
370 bool needBitsFlag = true;
372 if (mop.opHiBits32())
374 else if (mop.opLoBits32())
376 else if (mop.opHiBits64())
378 else if (mop.opLoBits64())
381 needBitsFlag = false;
383 switch (mop.getOperandType())
385 case MachineOperand::MO_VirtualRegister:
386 case MachineOperand::MO_CCRegister:
387 case MachineOperand::MO_MachineRegister:
389 int RegNum = (int)mop.getAllocatedRegNum();
391 // better to print code with NULL registers than to die
392 if (RegNum == Target.getRegInfo().getInvalidRegNum()) {
393 toAsm << "<NULL VALUE>";
395 toAsm << "%" << Target.getRegInfo().getUnifiedRegName(RegNum);
400 case MachineOperand::MO_PCRelativeDisp:
402 const Value *Val = mop.getVRegValue();
403 assert(Val && "\tNULL Value in SparcFunctionAsmPrinter");
405 if (const BasicBlock *BB = dyn_cast<const BasicBlock>(Val))
407 else if (const Function *M = dyn_cast<Function>(Val))
409 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
411 else if (const Constant *CV = dyn_cast<Constant>(Val))
414 assert(0 && "Unrecognized value in SparcFunctionAsmPrinter");
418 case MachineOperand::MO_SignExtendedImmed:
419 toAsm << mop.getImmedValue();
422 case MachineOperand::MO_UnextendedImmed:
423 toAsm << (uint64_t) mop.getImmedValue();
427 toAsm << mop; // use dump field
437 SparcFunctionAsmPrinter::emitMachineInst(const MachineInstr *MI)
439 unsigned Opcode = MI->getOpCode();
441 if (TargetInstrDescriptors[Opcode].iclass & M_DUMMY_PHI_FLAG)
442 return; // IGNORE PHI NODES
444 toAsm << "\t" << TargetInstrDescriptors[Opcode].opCodeString << "\t";
446 unsigned Mask = getOperandMask(Opcode);
448 bool NeedComma = false;
450 for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
451 if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
452 if (NeedComma) toAsm << ", "; // Handle comma outputing
454 N = printOperands(MI, OpNum);
463 SparcFunctionAsmPrinter::emitBasicBlock(const BasicBlock *BB)
465 // Emit a label for the basic block
466 toAsm << getID(BB) << ":\n";
468 // Get the vector of machine instructions corresponding to this bb.
469 const MachineCodeForBasicBlock &MIs = MachineCodeForBasicBlock::get(BB);
470 MachineCodeForBasicBlock::const_iterator MII = MIs.begin(), MIE = MIs.end();
472 // Loop over all of the instructions in the basic block...
473 for (; MII != MIE; ++MII)
474 emitMachineInst(*MII);
475 toAsm << "\n"; // Seperate BB's with newlines
479 SparcFunctionAsmPrinter::emitFunction(const Function &F)
481 string methName = getID(&F);
482 toAsm << "!****** Outputing Function: " << methName << " ******\n";
483 enterSection(AsmPrinter::Text);
484 toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
485 //toAsm << "\t.type\t" << methName << ",#function\n";
486 toAsm << "\t.type\t" << methName << ", 2\n";
487 toAsm << methName << ":\n";
489 // Output code for all of the basic blocks in the function...
490 for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I)
493 // Output a .size directive so the debugger knows the extents of the function
494 toAsm << ".EndOf_" << methName << ":\n\t.size "
495 << methName << ", .EndOf_"
496 << methName << "-" << methName << "\n";
498 // Put some spaces between the functions
502 } // End anonymous namespace
504 Pass *UltraSparc::getFunctionAsmPrinterPass(PassManager &PM, std::ostream &Out){
505 return new SparcFunctionAsmPrinter(Out, *this);
512 //===----------------------------------------------------------------------===//
513 // SparcFunctionAsmPrinter Code
514 //===----------------------------------------------------------------------===//
518 class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
520 SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
521 : AsmPrinter(os, t) {}
523 const char *getPassName() const { return "Output Sparc Assembly for Module"; }
525 virtual bool run(Module &M) {
527 emitGlobalsAndConstants(M);
532 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
533 AU.setPreservesAll();
537 void emitGlobalsAndConstants(const Module &M);
539 void printGlobalVariable(const GlobalVariable *GV);
540 void printSingleConstant( const Constant* CV);
541 void printConstantValueOnly(const Constant* CV);
542 void printConstant( const Constant* CV, std::string valID = "");
544 static void FoldConstants(const Module &M,
545 hash_set<const Constant*> &moduleConstants);
549 // Can we treat the specified array as a string? Only if it is an array of
550 // ubytes or non-negative sbytes.
552 static bool isStringCompatible(const ConstantArray *CPA) {
553 const Type *ETy = cast<ArrayType>(CPA->getType())->getElementType();
554 if (ETy == Type::UByteTy) return true;
555 if (ETy != Type::SByteTy) return false;
557 for (unsigned i = 0; i < CPA->getNumOperands(); ++i)
558 if (cast<ConstantSInt>(CPA->getOperand(i))->getValue() < 0)
564 // toOctal - Convert the low order bits of X into an octal letter
565 static inline char toOctal(int X) {
569 // getAsCString - Return the specified array as a C compatible string, only if
570 // the predicate isStringCompatible is true.
572 static string getAsCString(const ConstantArray *CPA) {
573 assert(isStringCompatible(CPA) && "Array is not string compatible!");
576 const Type *ETy = cast<ArrayType>(CPA->getType())->getElementType();
578 for (unsigned i = 0; i < CPA->getNumOperands(); ++i) {
579 unsigned char C = (ETy == Type::SByteTy) ?
580 (unsigned char)cast<ConstantSInt>(CPA->getOperand(i))->getValue() :
581 (unsigned char)cast<ConstantUInt>(CPA->getOperand(i))->getValue();
585 } else if (isprint(C)) {
589 case '\a': Result += "\\a"; break;
590 case '\b': Result += "\\b"; break;
591 case '\f': Result += "\\f"; break;
592 case '\n': Result += "\\n"; break;
593 case '\r': Result += "\\r"; break;
594 case '\t': Result += "\\t"; break;
595 case '\v': Result += "\\v"; break;
598 Result += toOctal(C >> 6);
599 Result += toOctal(C >> 3);
600 Result += toOctal(C >> 0);
611 ArrayTypeIsString(const ArrayType* arrayType)
613 return (arrayType->getElementType() == Type::UByteTy ||
614 arrayType->getElementType() == Type::SByteTy);
619 TypeToDataDirective(const Type* type)
621 switch(type->getPrimitiveID())
623 case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
625 case Type::UShortTyID: case Type::ShortTyID:
627 case Type::UIntTyID: case Type::IntTyID:
629 case Type::ULongTyID: case Type::LongTyID: case Type::PointerTyID:
631 case Type::FloatTyID:
633 case Type::DoubleTyID:
635 case Type::ArrayTyID:
636 if (ArrayTypeIsString((ArrayType*) type))
639 return "<InvaliDataTypeForPrinting>";
641 return "<InvaliDataTypeForPrinting>";
645 // Get the size of the constant for the given target.
646 // If this is an unsized array, return 0.
649 ConstantToSize(const Constant* CV, const TargetMachine& target)
651 if (const ConstantArray* CPA = dyn_cast<ConstantArray>(CV))
653 const ArrayType *aty = cast<ArrayType>(CPA->getType());
654 if (ArrayTypeIsString(aty))
655 return 1 + CPA->getNumOperands();
658 return target.findOptimalStorageSize(CV->getType());
663 // Align data larger than one L1 cache line on L1 cache line boundaries.
664 // Align all smaller data on the next higher 2^x boundary (4, 8, ...).
667 SizeToAlignment(unsigned int size, const TargetMachine& target)
669 unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
670 if (size > (unsigned) cacheLineSize / 2)
671 return cacheLineSize;
673 for (unsigned sz=1; /*no condition*/; sz *= 2)
678 // Get the size of the type and then use SizeToAlignment.
681 TypeToAlignment(const Type* type, const TargetMachine& target)
683 return SizeToAlignment(target.findOptimalStorageSize(type), target);
686 // Get the size of the constant and then use SizeToAlignment.
687 // Handles strings as a special case;
689 ConstantToAlignment(const Constant* CV, const TargetMachine& target)
691 if (const ConstantArray* CPA = dyn_cast<ConstantArray>(CV))
692 if (ArrayTypeIsString(cast<ArrayType>(CPA->getType())))
693 return SizeToAlignment(1 + CPA->getNumOperands(), target);
695 return TypeToAlignment(CV->getType(), target);
699 // Print a single constant value.
701 SparcModuleAsmPrinter::printSingleConstant(const Constant* CV)
703 assert(CV->getType() != Type::VoidTy &&
704 CV->getType() != Type::TypeTy &&
705 CV->getType() != Type::LabelTy &&
706 "Unexpected type for Constant");
708 assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
709 && "Aggregate types should be handled outside this function");
711 toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
713 if (CV->getType()->isPrimitiveType())
715 if (CV->getType()->isFloatingPoint()) {
716 // FP Constants are printed as integer constants to avoid losing
718 double Val = cast<ConstantFP>(CV)->getValue();
719 if (CV->getType() == Type::FloatTy) {
720 float FVal = (float)Val;
721 char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
722 toAsm << *(unsigned int*)ProxyPtr;
723 } else if (CV->getType() == Type::DoubleTy) {
724 char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
725 toAsm << *(uint64_t*)ProxyPtr;
727 assert(0 && "Unknown floating point type!");
730 toAsm << "\t! " << CV->getType()->getDescription()
731 << " value: " << Val << "\n";
733 WriteAsOperand(toAsm, CV, false, false) << "\n";
736 else if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV))
737 { // This is a constant address for a global variable or method.
738 // Use the name of the variable or method as the address value.
739 toAsm << getID(CPR->getValue()) << "\n";
741 else if (isa<ConstantPointerNull>(CV))
742 { // Null pointer value
745 else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV))
746 { // Constant expression built from operators, constants, and symbolic addrs
747 toAsm << ConstantExprToString(CE, Target) << "\n";
751 assert(0 && "Unknown elementary type for constant");
755 // Print a constant value or values (it may be an aggregate).
756 // Uses printSingleConstant() to print each individual value.
758 SparcModuleAsmPrinter::printConstantValueOnly(const Constant* CV)
760 const ConstantArray *CPA = dyn_cast<ConstantArray>(CV);
762 if (CPA && isStringCompatible(CPA))
763 { // print the string alone and return
764 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CPA) << "\n";
767 { // Not a string. Print the values in successive locations
768 const std::vector<Use> &constValues = CPA->getValues();
769 for (unsigned i=0; i < constValues.size(); i++)
770 printConstantValueOnly(cast<Constant>(constValues[i].get()));
772 else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(CV))
773 { // Print the fields in successive locations
774 const std::vector<Use>& constValues = CPS->getValues();
775 for (unsigned i=0; i < constValues.size(); i++)
776 printConstantValueOnly(cast<Constant>(constValues[i].get()));
779 printSingleConstant(CV);
782 // Print a constant (which may be an aggregate) prefixed by all the
783 // appropriate directives. Uses printConstantValueOnly() to print the
786 SparcModuleAsmPrinter::printConstant(const Constant* CV, string valID)
788 if (valID.length() == 0)
791 toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
793 // Print .size and .type only if it is not a string.
794 const ConstantArray *CPA = dyn_cast<ConstantArray>(CV);
795 if (CPA && isStringCompatible(CPA))
796 { // print it as a string and return
797 toAsm << valID << ":\n";
798 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CPA) << "\n";
802 toAsm << "\t.type" << "\t" << valID << ",#object\n";
804 unsigned int constSize = ConstantToSize(CV, Target);
806 toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
808 toAsm << valID << ":\n";
810 printConstantValueOnly(CV);
814 void SparcModuleAsmPrinter::FoldConstants(const Module &M,
815 hash_set<const Constant*> &MC) {
816 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
817 if (!I->isExternal()) {
818 const hash_set<const Constant*> &pool =
819 MachineCodeForMethod::get(I).getConstantPoolValues();
820 MC.insert(pool.begin(), pool.end());
824 void SparcModuleAsmPrinter::printGlobalVariable(const GlobalVariable* GV)
826 toAsm << "\t.global\t" << getID(GV) << "\n";
828 if (GV->hasInitializer())
829 printConstant(GV->getInitializer(), getID(GV));
831 toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
833 toAsm << "\t.type\t" << getID(GV) << ",#object\n";
834 toAsm << "\t.reserve\t" << getID(GV) << ","
835 << Target.findOptimalStorageSize(GV->getType()->getElementType())
841 void SparcModuleAsmPrinter::emitGlobalsAndConstants(const Module &M) {
842 // First, get the constants there were marked by the code generator for
843 // inclusion in the assembly code data area and fold them all into a
844 // single constant pool since there may be lots of duplicates. Also,
845 // lets force these constants into the slot table so that we can get
846 // unique names for unnamed constants also.
848 hash_set<const Constant*> moduleConstants;
849 FoldConstants(M, moduleConstants);
851 // Output constants spilled to memory
852 enterSection(AsmPrinter::ReadOnlyData);
853 for (hash_set<const Constant*>::const_iterator I = moduleConstants.begin(),
854 E = moduleConstants.end(); I != E; ++I)
857 // Output global variables...
858 for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI) {
859 if (GI->hasInitializer() && GI->isConstant()) {
860 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
861 } else if (GI->hasInitializer() && !GI->isConstant()) { // read-write data
862 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
863 } else if (GI->hasInitializer() && !GI->isConstant()) { // read-write data
864 enterSection(AsmPrinter::InitRWData);
866 assert (!GI->hasInitializer() && "Unexpected global variable type found");
867 enterSection(AsmPrinter::UninitRWData); // Uninitialized data
869 printGlobalVariable(GI);
875 } // End anonymous namespace
877 Pass *UltraSparc::getModuleAsmPrinterPass(PassManager &PM, std::ostream &Out) {
878 return new SparcModuleAsmPrinter(Out, *this);