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/Module.h"
22 #include "llvm/SlotCalculator.h"
23 #include "llvm/Pass.h"
24 #include "llvm/Assembly/Writer.h"
25 #include "Support/StringExtras.h"
31 class GlobalIdTable: public Annotation {
32 static AnnotationID AnnotId;
33 friend class AsmPrinter; // give access to AnnotId
35 typedef hash_map<const Value*, int> ValIdMap;
36 typedef ValIdMap::const_iterator ValIdMapConstIterator;
37 typedef ValIdMap:: iterator ValIdMapIterator;
39 SlotCalculator Table; // map anonymous values to unique integer IDs
40 ValIdMap valToIdMap; // used for values not handled by SlotCalculator
42 GlobalIdTable(Module* M) : Annotation(AnnotId), Table(M, true) {}
45 AnnotationID GlobalIdTable::AnnotId =
46 AnnotationManager::getID("ASM PRINTER GLOBAL TABLE ANNOT");
48 //===---------------------------------------------------------------------===//
49 // Code Shared By the two printer passes, as a mixin
50 //===---------------------------------------------------------------------===//
53 GlobalIdTable* idTable;
56 const TargetMachine &Target;
66 AsmPrinter(std::ostream &os, const TargetMachine &T)
67 : idTable(0), toAsm(os), Target(T), CurSection(Unknown) {}
69 // (start|end)(Module|Function) - Callback methods to be invoked by subclasses
70 void startModule(Module &M) {
71 // Create the global id table if it does not already exist
72 idTable = (GlobalIdTable*)M.getAnnotation(GlobalIdTable::AnnotId);
73 if (idTable == NULL) {
74 idTable = new GlobalIdTable(&M);
75 M.addAnnotation(idTable);
78 void startFunction(Function &F) {
79 // Make sure the slot table has information about this function...
80 idTable->Table.incorporateFunction(&F);
82 void endFunction(Function &) {
83 idTable->Table.purgeFunction(); // Forget all about F
88 // Check if a value is external or accessible from external code.
89 bool isExternal(const Value* V) {
90 const GlobalValue *GV = dyn_cast<GlobalValue>(V);
91 return GV && GV->hasExternalLinkage();
94 // enterSection - Use this method to enter a different section of the output
95 // executable. This is used to only output neccesary section transitions.
97 void enterSection(enum Sections S) {
98 if (S == CurSection) return; // Only switch section if neccesary
101 toAsm << "\n\t.section ";
104 default: assert(0 && "Bad section name!");
105 case Text: toAsm << "\".text\""; break;
106 case ReadOnlyData: toAsm << "\".rodata\",#alloc"; break;
107 case InitRWData: toAsm << "\".data\",#alloc,#write"; break;
108 case ZeroInitRWData: toAsm << "\".bss\",#alloc,#write"; break;
113 static std::string getValidSymbolName(const string &S) {
116 // Symbol names in Sparc assembly language have these rules:
117 // (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
118 // (b) A name beginning in "." is treated as a local name.
119 // (c) Names beginning with "_" are reserved by ANSI C and shd not be used.
121 if (S[0] == '_' || isdigit(S[0]))
124 for (unsigned i = 0; i < S.size(); ++i)
127 if (C == '_' || C == '.' || C == '$' || isalpha(C) || isdigit(C))
132 Result += char('0' + ((unsigned char)C >> 4));
133 Result += char('0' + (C & 0xF));
139 // getID - Return a valid identifier for the specified value. Base it on
140 // the name of the identifier if possible (qualified by the type), and
141 // use a numbered value based on prefix otherwise.
142 // FPrefix is always prepended to the output identifier.
144 string getID(const Value *V, const char *Prefix, const char *FPrefix = 0) {
145 string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
147 Result += V->hasName() ? V->getName() : string(Prefix);
149 // Qualify all internal names with a unique id.
150 if (!isExternal(V)) {
151 int valId = idTable->Table.getValSlot(V);
153 GlobalIdTable::ValIdMapConstIterator I = idTable->valToIdMap.find(V);
154 if (I == idTable->valToIdMap.end())
155 valId = idTable->valToIdMap[V] = idTable->valToIdMap.size();
159 Result = Result + "_" + itostr(valId);
162 return getValidSymbolName(Result);
165 // getID Wrappers - Ensure consistent usage...
166 string getID(const Function *F) {
167 return getID(F, "LLVMFunction_");
169 string getID(const BasicBlock *BB) {
170 return getID(BB, "LL", (".L_"+getID(BB->getParent())+"_").c_str());
172 string getID(const GlobalVariable *GV) {
173 return getID(GV, "LLVMGlobal_");
175 string getID(const Constant *CV) {
176 return getID(CV, "LLVMConst_", ".C_");
178 string getID(const GlobalValue *GV) {
179 if (const GlobalVariable *V = dyn_cast<GlobalVariable>(GV))
181 else if (const Function *F = dyn_cast<Function>(GV))
183 assert(0 && "Unexpected type of GlobalValue!");
187 // ConstantExprToString() - Convert a ConstantExpr to an asm expression
188 // and return this as a string.
189 std::string ConstantExprToString(const ConstantExpr* CE,
190 const TargetMachine& target) {
193 switch(CE->getOpcode()) {
194 case Instruction::GetElementPtr:
195 { // generate a symbolic expression for the byte address
196 const Value* ptrVal = CE->getOperand(0);
197 std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
198 S += "(" + valToExprString(ptrVal, target) + ") + ("
199 + utostr(target.DataLayout.getIndexedOffset(ptrVal->getType(),idxVec))
204 case Instruction::Cast:
205 // Support only non-converting casts for now, i.e., a no-op.
206 // This assertion is not a complete check.
207 assert(target.DataLayout.getTypeSize(CE->getType()) ==
208 target.DataLayout.getTypeSize(CE->getOperand(0)->getType()));
209 S += "(" + valToExprString(CE->getOperand(0), target) + ")";
212 case Instruction::Add:
213 S += "(" + valToExprString(CE->getOperand(0), target) + ") + ("
214 + valToExprString(CE->getOperand(1), target) + ")";
218 assert(0 && "Unsupported operator in ConstantExprToString()");
225 // valToExprString - Helper function for ConstantExprToString().
226 // Appends result to argument string S.
228 std::string valToExprString(const Value* V, const TargetMachine& target) {
231 if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
233 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
234 S += std::string(CB == ConstantBool::True ? "1" : "0");
235 else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
236 S += itostr(CI->getValue());
237 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
238 S += utostr(CI->getValue());
239 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
240 S += ftostr(CFP->getValue());
241 else if (isa<ConstantPointerNull>(CV))
243 else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
244 S += valToExprString(CPR->getValue(), target);
245 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
246 S += ConstantExprToString(CE, target);
250 } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
257 assert(0 && "Cannot convert value to string");
258 S += "<illegal-value>";
267 //===----------------------------------------------------------------------===//
268 // SparcFunctionAsmPrinter Code
269 //===----------------------------------------------------------------------===//
271 struct SparcFunctionAsmPrinter : public FunctionPass, public AsmPrinter {
272 inline SparcFunctionAsmPrinter(std::ostream &os, const TargetMachine &t)
273 : AsmPrinter(os, t) {}
275 const char *getPassName() const {
276 return "Output Sparc Assembly for Functions";
279 virtual bool doInitialization(Module &M) {
284 virtual bool runOnFunction(Function &F) {
291 virtual bool doFinalization(Module &M) {
296 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
297 AU.setPreservesAll();
300 void emitFunction(const Function &F);
302 void emitBasicBlock(const BasicBlock *BB);
303 void emitMachineInst(const MachineInstr *MI);
305 unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
306 void printOneOperand(const MachineOperand &Op);
308 bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
309 bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
311 unsigned getOperandMask(unsigned Opcode) {
313 case SUBcc: return 1 << 3; // Remove CC argument
314 //case BA: return 1 << 0; // Remove Arg #0, which is always null or xcc
315 default: return 0; // By default, don't hack operands...
321 SparcFunctionAsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
322 unsigned int opNum) {
323 switch (MI->getOpCode()) {
325 case JMPLRET: return (opNum == 0);
326 default: return false;
332 SparcFunctionAsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
333 unsigned int opNum) {
334 if (Target.getInstrInfo().isLoad(MI->getOpCode()))
336 else if (Target.getInstrInfo().isStore(MI->getOpCode()))
343 #define PrintOp1PlusOp2(mop1, mop2) \
344 printOneOperand(mop1); \
346 printOneOperand(mop2);
349 SparcFunctionAsmPrinter::printOperands(const MachineInstr *MI,
352 const MachineOperand& mop = MI->getOperand(opNum);
354 if (OpIsBranchTargetLabel(MI, opNum))
356 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
359 else if (OpIsMemoryAddressBase(MI, opNum))
362 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
368 printOneOperand(mop);
375 SparcFunctionAsmPrinter::printOneOperand(const MachineOperand &mop)
377 bool needBitsFlag = true;
379 if (mop.opHiBits32())
381 else if (mop.opLoBits32())
383 else if (mop.opHiBits64())
385 else if (mop.opLoBits64())
388 needBitsFlag = false;
390 switch (mop.getOperandType())
392 case MachineOperand::MO_VirtualRegister:
393 case MachineOperand::MO_CCRegister:
394 case MachineOperand::MO_MachineRegister:
396 int RegNum = (int)mop.getAllocatedRegNum();
398 // better to print code with NULL registers than to die
399 if (RegNum == Target.getRegInfo().getInvalidRegNum()) {
400 toAsm << "<NULL VALUE>";
402 toAsm << "%" << Target.getRegInfo().getUnifiedRegName(RegNum);
407 case MachineOperand::MO_PCRelativeDisp:
409 const Value *Val = mop.getVRegValue();
410 assert(Val && "\tNULL Value in SparcFunctionAsmPrinter");
412 if (const BasicBlock *BB = dyn_cast<const BasicBlock>(Val))
414 else if (const Function *M = dyn_cast<Function>(Val))
416 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
418 else if (const Constant *CV = dyn_cast<Constant>(Val))
421 assert(0 && "Unrecognized value in SparcFunctionAsmPrinter");
425 case MachineOperand::MO_SignExtendedImmed:
426 toAsm << mop.getImmedValue();
429 case MachineOperand::MO_UnextendedImmed:
430 toAsm << (uint64_t) mop.getImmedValue();
434 toAsm << mop; // use dump field
444 SparcFunctionAsmPrinter::emitMachineInst(const MachineInstr *MI)
446 unsigned Opcode = MI->getOpCode();
448 if (TargetInstrDescriptors[Opcode].iclass & M_DUMMY_PHI_FLAG)
449 return; // IGNORE PHI NODES
451 toAsm << "\t" << TargetInstrDescriptors[Opcode].opCodeString << "\t";
453 unsigned Mask = getOperandMask(Opcode);
455 bool NeedComma = false;
457 for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
458 if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
459 if (NeedComma) toAsm << ", "; // Handle comma outputing
461 N = printOperands(MI, OpNum);
470 SparcFunctionAsmPrinter::emitBasicBlock(const BasicBlock *BB)
472 // Emit a label for the basic block
473 toAsm << getID(BB) << ":\n";
475 // Get the vector of machine instructions corresponding to this bb.
476 const MachineCodeForBasicBlock &MIs = MachineCodeForBasicBlock::get(BB);
477 MachineCodeForBasicBlock::const_iterator MII = MIs.begin(), MIE = MIs.end();
479 // Loop over all of the instructions in the basic block...
480 for (; MII != MIE; ++MII)
481 emitMachineInst(*MII);
482 toAsm << "\n"; // Seperate BB's with newlines
486 SparcFunctionAsmPrinter::emitFunction(const Function &F)
488 string methName = getID(&F);
489 toAsm << "!****** Outputing Function: " << methName << " ******\n";
490 enterSection(AsmPrinter::Text);
491 toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
492 //toAsm << "\t.type\t" << methName << ",#function\n";
493 toAsm << "\t.type\t" << methName << ", 2\n";
494 toAsm << methName << ":\n";
496 // Output code for all of the basic blocks in the function...
497 for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I)
500 // Output a .size directive so the debugger knows the extents of the function
501 toAsm << ".EndOf_" << methName << ":\n\t.size "
502 << methName << ", .EndOf_"
503 << methName << "-" << methName << "\n";
505 // Put some spaces between the functions
509 } // End anonymous namespace
511 Pass *UltraSparc::getFunctionAsmPrinterPass(std::ostream &Out) {
512 return new SparcFunctionAsmPrinter(Out, *this);
519 //===----------------------------------------------------------------------===//
520 // SparcFunctionAsmPrinter Code
521 //===----------------------------------------------------------------------===//
525 class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
527 SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
528 : AsmPrinter(os, t) {}
530 const char *getPassName() const { return "Output Sparc Assembly for Module"; }
532 virtual bool run(Module &M) {
534 emitGlobalsAndConstants(M);
539 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
540 AU.setPreservesAll();
544 void emitGlobalsAndConstants (const Module &M);
546 void printGlobalVariable (const GlobalVariable *GV);
547 void PrintZeroBytesToPad (int numBytes);
548 void printSingleConstantValue (const Constant* CV);
549 void printConstantValueOnly (const Constant* CV, int numPadBytes = 0);
550 void printConstant (const Constant* CV, std::string valID = "");
552 static void FoldConstants (const Module &M,
553 hash_set<const Constant*> &moduleConstants);
557 // Can we treat the specified array as a string? Only if it is an array of
558 // ubytes or non-negative sbytes.
560 static bool isStringCompatible(const ConstantArray *CVA) {
561 const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
562 if (ETy == Type::UByteTy) return true;
563 if (ETy != Type::SByteTy) return false;
565 for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
566 if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
572 // toOctal - Convert the low order bits of X into an octal letter
573 static inline char toOctal(int X) {
577 // getAsCString - Return the specified array as a C compatible string, only if
578 // the predicate isStringCompatible is true.
580 static string getAsCString(const ConstantArray *CVA) {
581 assert(isStringCompatible(CVA) && "Array is not string compatible!");
584 const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
586 for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
587 unsigned char C = (ETy == Type::SByteTy) ?
588 (unsigned char)cast<ConstantSInt>(CVA->getOperand(i))->getValue() :
589 (unsigned char)cast<ConstantUInt>(CVA->getOperand(i))->getValue();
593 } else if (isprint(C)) {
597 case '\a': Result += "\\a"; break;
598 case '\b': Result += "\\b"; break;
599 case '\f': Result += "\\f"; break;
600 case '\n': Result += "\\n"; break;
601 case '\r': Result += "\\r"; break;
602 case '\t': Result += "\\t"; break;
603 case '\v': Result += "\\v"; break;
606 Result += toOctal(C >> 6);
607 Result += toOctal(C >> 3);
608 Result += toOctal(C >> 0);
619 ArrayTypeIsString(const ArrayType* arrayType)
621 return (arrayType->getElementType() == Type::UByteTy ||
622 arrayType->getElementType() == Type::SByteTy);
627 TypeToDataDirective(const Type* type)
629 switch(type->getPrimitiveID())
631 case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
633 case Type::UShortTyID: case Type::ShortTyID:
635 case Type::UIntTyID: case Type::IntTyID:
637 case Type::ULongTyID: case Type::LongTyID: case Type::PointerTyID:
639 case Type::FloatTyID:
641 case Type::DoubleTyID:
643 case Type::ArrayTyID:
644 if (ArrayTypeIsString((ArrayType*) type))
647 return "<InvaliDataTypeForPrinting>";
649 return "<InvaliDataTypeForPrinting>";
653 // Get the size of the type
656 TypeToSize(const Type* type, const TargetMachine& target)
658 return target.findOptimalStorageSize(type);
661 // Get the size of the constant for the given target.
662 // If this is an unsized array, return 0.
665 ConstantToSize(const Constant* CV, const TargetMachine& target)
667 if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
669 const ArrayType *aty = cast<ArrayType>(CVA->getType());
670 if (ArrayTypeIsString(aty))
671 return 1 + CVA->getNumOperands();
674 return TypeToSize(CV->getType(), target);
677 // Align data larger than one L1 cache line on L1 cache line boundaries.
678 // Align all smaller data on the next higher 2^x boundary (4, 8, ...).
681 SizeToAlignment(unsigned int size, const TargetMachine& target)
683 unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
684 if (size > (unsigned) cacheLineSize / 2)
685 return cacheLineSize;
687 for (unsigned sz=1; /*no condition*/; sz *= 2)
692 // Get the size of the type and then use SizeToAlignment.
695 TypeToAlignment(const Type* type, const TargetMachine& target)
697 return SizeToAlignment(TypeToSize(type, target), target);
700 // Get the size of the constant and then use SizeToAlignment.
701 // Handles strings as a special case;
703 ConstantToAlignment(const Constant* CV, const TargetMachine& target)
705 if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
706 if (ArrayTypeIsString(cast<ArrayType>(CVA->getType())))
707 return SizeToAlignment(1 + CVA->getNumOperands(), target);
709 return TypeToAlignment(CV->getType(), target);
713 // Print a single constant value.
715 SparcModuleAsmPrinter::printSingleConstantValue(const Constant* CV)
717 assert(CV->getType() != Type::VoidTy &&
718 CV->getType() != Type::TypeTy &&
719 CV->getType() != Type::LabelTy &&
720 "Unexpected type for Constant");
722 assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
723 && "Aggregate types should be handled outside this function");
725 toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
727 if (CV->getType()->isPrimitiveType())
729 if (CV->getType()->isFloatingPoint()) {
730 // FP Constants are printed as integer constants to avoid losing
732 double Val = cast<ConstantFP>(CV)->getValue();
733 if (CV->getType() == Type::FloatTy) {
734 float FVal = (float)Val;
735 char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
736 toAsm << *(unsigned int*)ProxyPtr;
737 } else if (CV->getType() == Type::DoubleTy) {
738 char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
739 toAsm << *(uint64_t*)ProxyPtr;
741 assert(0 && "Unknown floating point type!");
744 toAsm << "\t! " << CV->getType()->getDescription()
745 << " value: " << Val << "\n";
747 WriteAsOperand(toAsm, CV, false, false) << "\n";
750 else if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV))
751 { // This is a constant address for a global variable or method.
752 // Use the name of the variable or method as the address value.
753 toAsm << getID(CPR->getValue()) << "\n";
755 else if (isa<ConstantPointerNull>(CV))
756 { // Null pointer value
759 else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV))
760 { // Constant expression built from operators, constants, and symbolic addrs
761 toAsm << ConstantExprToString(CE, Target) << "\n";
765 assert(0 && "Unknown elementary type for constant");
770 SparcModuleAsmPrinter::PrintZeroBytesToPad(int numBytes)
772 for ( ; numBytes >= 8; numBytes -= 8)
773 printSingleConstantValue(Constant::getNullValue(Type::ULongTy));
777 printSingleConstantValue(Constant::getNullValue(Type::UIntTy));
782 printSingleConstantValue(Constant::getNullValue(Type::UByteTy));
785 // Print a constant value or values (it may be an aggregate).
786 // Uses printSingleConstantValue() to print each individual value.
788 SparcModuleAsmPrinter::printConstantValueOnly(const Constant* CV,
789 int numPadBytes /* = 0*/)
791 const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
794 PrintZeroBytesToPad(numPadBytes);
796 if (CVA && isStringCompatible(CVA))
797 { // print the string alone and return
798 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
801 { // Not a string. Print the values in successive locations
802 const std::vector<Use> &constValues = CVA->getValues();
803 for (unsigned i=0; i < constValues.size(); i++)
804 printConstantValueOnly(cast<Constant>(constValues[i].get()));
806 else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
807 { // Print the fields in successive locations. Pad to align if needed!
808 const StructLayout *cvsLayout =
809 Target.DataLayout.getStructLayout(CVS->getType());
810 const std::vector<Use>& constValues = CVS->getValues();
811 unsigned sizeSoFar = 0;
812 for (unsigned i=0, N = constValues.size(); i < N; i++)
814 const Constant* field = cast<Constant>(constValues[i].get());
816 // Check if padding is needed and insert one or more 0s.
817 unsigned fieldSize = Target.DataLayout.getTypeSize(field->getType());
818 int padSize = ((i == N-1? cvsLayout->StructSize
819 : cvsLayout->MemberOffsets[i+1])
820 - cvsLayout->MemberOffsets[i]) - fieldSize;
821 sizeSoFar += (fieldSize + padSize);
823 // Now print the actual field value
824 printConstantValueOnly(field, padSize);
826 assert(sizeSoFar == cvsLayout->StructSize &&
827 "Layout of constant struct may be incorrect!");
830 printSingleConstantValue(CV);
833 // Print a constant (which may be an aggregate) prefixed by all the
834 // appropriate directives. Uses printConstantValueOnly() to print the
837 SparcModuleAsmPrinter::printConstant(const Constant* CV, string valID)
839 if (valID.length() == 0)
842 toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
844 // Print .size and .type only if it is not a string.
845 const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
846 if (CVA && isStringCompatible(CVA))
847 { // print it as a string and return
848 toAsm << valID << ":\n";
849 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
853 toAsm << "\t.type" << "\t" << valID << ",#object\n";
855 unsigned int constSize = ConstantToSize(CV, Target);
857 toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
859 toAsm << valID << ":\n";
861 printConstantValueOnly(CV);
865 void SparcModuleAsmPrinter::FoldConstants(const Module &M,
866 hash_set<const Constant*> &MC) {
867 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
868 if (!I->isExternal()) {
869 const hash_set<const Constant*> &pool =
870 MachineCodeForMethod::get(I).getConstantPoolValues();
871 MC.insert(pool.begin(), pool.end());
875 void SparcModuleAsmPrinter::printGlobalVariable(const GlobalVariable* GV)
877 if (GV->hasExternalLinkage())
878 toAsm << "\t.global\t" << getID(GV) << "\n";
880 if (GV->hasInitializer() && ! GV->getInitializer()->isNullValue())
881 printConstant(GV->getInitializer(), getID(GV));
883 toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
885 toAsm << "\t.type\t" << getID(GV) << ",#object\n";
886 toAsm << "\t.reserve\t" << getID(GV) << ","
887 << TypeToSize(GV->getType()->getElementType(), Target)
893 void SparcModuleAsmPrinter::emitGlobalsAndConstants(const Module &M) {
894 // First, get the constants there were marked by the code generator for
895 // inclusion in the assembly code data area and fold them all into a
896 // single constant pool since there may be lots of duplicates. Also,
897 // lets force these constants into the slot table so that we can get
898 // unique names for unnamed constants also.
900 hash_set<const Constant*> moduleConstants;
901 FoldConstants(M, moduleConstants);
903 // Output constants spilled to memory
904 enterSection(AsmPrinter::ReadOnlyData);
905 for (hash_set<const Constant*>::const_iterator I = moduleConstants.begin(),
906 E = moduleConstants.end(); I != E; ++I)
909 // Output global variables...
910 for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI)
911 if (! GI->isExternal()) {
912 assert(GI->hasInitializer());
913 if (GI->isConstant())
914 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
915 else if (GI->getInitializer()->isNullValue())
916 enterSection(AsmPrinter::ZeroInitRWData); // read-write zero data
918 enterSection(AsmPrinter::InitRWData); // read-write non-zero data
920 printGlobalVariable(GI);
926 } // End anonymous namespace
928 Pass *UltraSparc::getModuleAsmPrinterPass(std::ostream &Out) {
929 return new SparcModuleAsmPrinter(Out, *this);