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/MachineFunction.h"
17 #include "llvm/CodeGen/MachineFunctionInfo.h"
18 #include "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/Module.h"
21 #include "llvm/SlotCalculator.h"
22 #include "llvm/Pass.h"
23 #include "llvm/Assembly/Writer.h"
24 #include "Support/StringExtras.h"
29 class GlobalIdTable: public Annotation {
30 static AnnotationID AnnotId;
31 friend class AsmPrinter; // give access to AnnotId
33 typedef hash_map<const Value*, int> ValIdMap;
34 typedef ValIdMap::const_iterator ValIdMapConstIterator;
35 typedef ValIdMap:: iterator ValIdMapIterator;
37 SlotCalculator Table; // map anonymous values to unique integer IDs
38 ValIdMap valToIdMap; // used for values not handled by SlotCalculator
40 GlobalIdTable(Module* M) : Annotation(AnnotId), Table(M, true) {}
43 AnnotationID GlobalIdTable::AnnotId =
44 AnnotationManager::getID("ASM PRINTER GLOBAL TABLE ANNOT");
46 //===---------------------------------------------------------------------===//
47 // Code Shared By the two printer passes, as a mixin
48 //===---------------------------------------------------------------------===//
51 GlobalIdTable* idTable;
54 const TargetMachine &Target;
64 AsmPrinter(std::ostream &os, const TargetMachine &T)
65 : idTable(0), toAsm(os), Target(T), CurSection(Unknown) {}
67 // (start|end)(Module|Function) - Callback methods to be invoked by subclasses
68 void startModule(Module &M) {
69 // Create the global id table if it does not already exist
70 idTable = (GlobalIdTable*)M.getAnnotation(GlobalIdTable::AnnotId);
71 if (idTable == NULL) {
72 idTable = new GlobalIdTable(&M);
73 M.addAnnotation(idTable);
76 void startFunction(Function &F) {
77 // Make sure the slot table has information about this function...
78 idTable->Table.incorporateFunction(&F);
80 void endFunction(Function &) {
81 idTable->Table.purgeFunction(); // Forget all about F
86 // Check if a value is external or accessible from external code.
87 bool isExternal(const Value* V) {
88 const GlobalValue *GV = dyn_cast<GlobalValue>(V);
89 return GV && GV->hasExternalLinkage();
92 // enterSection - Use this method to enter a different section of the output
93 // executable. This is used to only output neccesary section transitions.
95 void enterSection(enum Sections S) {
96 if (S == CurSection) return; // Only switch section if neccesary
99 toAsm << "\n\t.section ";
102 default: assert(0 && "Bad section name!");
103 case Text: toAsm << "\".text\""; break;
104 case ReadOnlyData: toAsm << "\".rodata\",#alloc"; break;
105 case InitRWData: toAsm << "\".data\",#alloc,#write"; break;
106 case ZeroInitRWData: toAsm << "\".bss\",#alloc,#write"; break;
111 static string getValidSymbolName(const string &S) {
114 // Symbol names in Sparc assembly language have these rules:
115 // (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
116 // (b) A name beginning in "." is treated as a local name.
121 for (unsigned i = 0; i < S.size(); ++i)
124 if (C == '_' || C == '.' || C == '$' || isalpha(C) || isdigit(C))
129 Result += char('0' + ((unsigned char)C >> 4));
130 Result += char('0' + (C & 0xF));
136 // getID - Return a valid identifier for the specified value. Base it on
137 // the name of the identifier if possible (qualified by the type), and
138 // use a numbered value based on prefix otherwise.
139 // FPrefix is always prepended to the output identifier.
141 string getID(const Value *V, const char *Prefix, const char *FPrefix = 0) {
142 string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
144 Result += V->hasName() ? V->getName() : string(Prefix);
146 // Qualify all internal names with a unique id.
147 if (!isExternal(V)) {
148 int valId = idTable->Table.getValSlot(V);
150 GlobalIdTable::ValIdMapConstIterator I = idTable->valToIdMap.find(V);
151 if (I == idTable->valToIdMap.end())
152 valId = idTable->valToIdMap[V] = idTable->valToIdMap.size();
156 Result = Result + "_" + itostr(valId);
158 // Replace or prefix problem characters in the name
159 Result = 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 string ConstantExprToString(const ConstantExpr* CE,
190 const TargetMachine& target) {
192 switch(CE->getOpcode()) {
193 case Instruction::GetElementPtr:
194 { // generate a symbolic expression for the byte address
195 const Value* ptrVal = CE->getOperand(0);
196 std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
197 const TargetData &TD = target.getTargetData();
198 S += "(" + valToExprString(ptrVal, target) + ") + ("
199 + utostr(TD.getIndexedOffset(ptrVal->getType(),idxVec)) + ")";
203 case Instruction::Cast:
204 // Support only non-converting casts for now, i.e., a no-op.
205 // This assertion is not a complete check.
206 assert(target.getTargetData().getTypeSize(CE->getType()) ==
207 target.getTargetData().getTypeSize(CE->getOperand(0)->getType()));
208 S += "(" + valToExprString(CE->getOperand(0), target) + ")";
211 case Instruction::Add:
212 S += "(" + valToExprString(CE->getOperand(0), target) + ") + ("
213 + valToExprString(CE->getOperand(1), target) + ")";
217 assert(0 && "Unsupported operator in ConstantExprToString()");
224 // valToExprString - Helper function for ConstantExprToString().
225 // Appends result to argument string S.
227 string valToExprString(const Value* V, const TargetMachine& target) {
230 if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
232 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
233 S += string(CB == ConstantBool::True ? "1" : "0");
234 else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
235 S += itostr(CI->getValue());
236 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
237 S += utostr(CI->getValue());
238 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
239 S += ftostr(CFP->getValue());
240 else if (isa<ConstantPointerNull>(CV))
242 else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
243 S += valToExprString(CPR->getValue(), target);
244 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
245 S += ConstantExprToString(CE, target);
249 } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
256 assert(0 && "Cannot convert value to string");
257 S += "<illegal-value>";
266 //===----------------------------------------------------------------------===//
267 // SparcFunctionAsmPrinter Code
268 //===----------------------------------------------------------------------===//
270 struct SparcFunctionAsmPrinter : public FunctionPass, public AsmPrinter {
271 inline SparcFunctionAsmPrinter(std::ostream &os, const TargetMachine &t)
272 : AsmPrinter(os, t) {}
274 const char *getPassName() const {
275 return "Output Sparc Assembly for Functions";
278 virtual bool doInitialization(Module &M) {
283 virtual bool runOnFunction(Function &F) {
290 virtual bool doFinalization(Module &M) {
295 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
296 AU.setPreservesAll();
299 void emitFunction(const Function &F);
301 void emitBasicBlock(const MachineBasicBlock &MBB);
302 void emitMachineInst(const MachineInstr *MI);
304 unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
305 void printOneOperand(const MachineOperand &Op, MachineOpCode opCode);
307 bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
308 bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
310 unsigned getOperandMask(unsigned Opcode) {
312 case V9::SUBcc: return 1 << 3; // Remove CC argument
313 //case BA: return 1 << 0; // Remove Arg #0, which is always null or xcc
314 default: return 0; // By default, don't hack operands...
320 SparcFunctionAsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
321 unsigned int opNum) {
322 switch (MI->getOpCode()) {
333 SparcFunctionAsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
334 unsigned int opNum) {
335 if (Target.getInstrInfo().isLoad(MI->getOpCode()))
337 else if (Target.getInstrInfo().isStore(MI->getOpCode()))
344 #define PrintOp1PlusOp2(mop1, mop2, opCode) \
345 printOneOperand(mop1, opCode); \
347 printOneOperand(mop2, opCode);
350 SparcFunctionAsmPrinter::printOperands(const MachineInstr *MI,
353 const MachineOperand& mop = MI->getOperand(opNum);
355 if (OpIsBranchTargetLabel(MI, opNum))
357 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpCode());
360 else if (OpIsMemoryAddressBase(MI, opNum))
363 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpCode());
369 printOneOperand(mop, MI->getOpCode());
375 SparcFunctionAsmPrinter::printOneOperand(const MachineOperand &mop,
376 MachineOpCode opCode)
378 bool needBitsFlag = true;
380 if (mop.opHiBits32())
382 else if (mop.opLoBits32())
384 else if (mop.opHiBits64())
386 else if (mop.opLoBits64())
389 needBitsFlag = false;
391 switch (mop.getType())
393 case MachineOperand::MO_VirtualRegister:
394 case MachineOperand::MO_CCRegister:
395 case MachineOperand::MO_MachineRegister:
397 int regNum = (int)mop.getAllocatedRegNum();
399 if (regNum == Target.getRegInfo().getInvalidRegNum()) {
400 // better to print code with NULL registers than to die
401 toAsm << "<NULL VALUE>";
403 toAsm << "%" << Target.getRegInfo().getUnifiedRegName(regNum);
408 case MachineOperand::MO_PCRelativeDisp:
410 const Value *Val = mop.getVRegValue();
411 assert(Val && "\tNULL Value in SparcFunctionAsmPrinter");
413 if (const BasicBlock *BB = dyn_cast<const BasicBlock>(Val))
415 else if (const Function *M = dyn_cast<Function>(Val))
417 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
419 else if (const Constant *CV = dyn_cast<Constant>(Val))
422 assert(0 && "Unrecognized value in SparcFunctionAsmPrinter");
426 case MachineOperand::MO_SignExtendedImmed:
427 toAsm << mop.getImmedValue();
430 case MachineOperand::MO_UnextendedImmed:
431 toAsm << (uint64_t) mop.getImmedValue();
435 toAsm << mop; // use dump field
445 SparcFunctionAsmPrinter::emitMachineInst(const MachineInstr *MI)
447 unsigned Opcode = MI->getOpCode();
449 if (Target.getInstrInfo().isDummyPhiInstr(Opcode))
450 return; // IGNORE PHI NODES
452 toAsm << "\t" << Target.getInstrInfo().getName(Opcode) << "\t";
454 unsigned Mask = getOperandMask(Opcode);
456 bool NeedComma = false;
458 for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
459 if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
460 if (NeedComma) toAsm << ", "; // Handle comma outputing
462 N = printOperands(MI, OpNum);
470 SparcFunctionAsmPrinter::emitBasicBlock(const MachineBasicBlock &MBB)
472 // Emit a label for the basic block
473 toAsm << getID(MBB.getBasicBlock()) << ":\n";
475 // Loop over all of the instructions in the basic block...
476 for (MachineBasicBlock::const_iterator MII = MBB.begin(), MIE = MBB.end();
478 emitMachineInst(*MII);
479 toAsm << "\n"; // Seperate BB's with newlines
483 SparcFunctionAsmPrinter::emitFunction(const Function &F)
485 string methName = getID(&F);
486 toAsm << "!****** Outputing Function: " << methName << " ******\n";
487 enterSection(AsmPrinter::Text);
488 toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
489 //toAsm << "\t.type\t" << methName << ",#function\n";
490 toAsm << "\t.type\t" << methName << ", 2\n";
491 toAsm << methName << ":\n";
493 // Output code for all of the basic blocks in the function...
494 MachineFunction &MF = MachineFunction::get(&F);
495 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); I != E;++I)
498 // Output a .size directive so the debugger knows the extents of the function
499 toAsm << ".EndOf_" << methName << ":\n\t.size "
500 << methName << ", .EndOf_"
501 << methName << "-" << methName << "\n";
503 // Put some spaces between the functions
507 } // End anonymous namespace
509 Pass *UltraSparc::getFunctionAsmPrinterPass(std::ostream &Out) {
510 return new SparcFunctionAsmPrinter(Out, *this);
517 //===----------------------------------------------------------------------===//
518 // SparcFunctionAsmPrinter Code
519 //===----------------------------------------------------------------------===//
523 class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
525 SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
526 : AsmPrinter(os, t) {}
528 const char *getPassName() const { return "Output Sparc Assembly for Module"; }
530 virtual bool run(Module &M) {
532 emitGlobalsAndConstants(M);
537 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
538 AU.setPreservesAll();
542 void emitGlobalsAndConstants (const Module &M);
544 void printGlobalVariable (const GlobalVariable *GV);
545 void PrintZeroBytesToPad (int numBytes);
546 void printSingleConstantValue (const Constant* CV);
547 void printConstantValueOnly (const Constant* CV, int numPadBytesAfter = 0);
548 void printConstant (const Constant* CV, string valID = "");
550 static void FoldConstants (const Module &M,
551 hash_set<const Constant*> &moduleConstants);
555 // Can we treat the specified array as a string? Only if it is an array of
556 // ubytes or non-negative sbytes.
558 static bool isStringCompatible(const ConstantArray *CVA) {
559 const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
560 if (ETy == Type::UByteTy) return true;
561 if (ETy != Type::SByteTy) return false;
563 for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
564 if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
570 // toOctal - Convert the low order bits of X into an octal letter
571 static inline char toOctal(int X) {
575 // getAsCString - Return the specified array as a C compatible string, only if
576 // the predicate isStringCompatible is true.
578 static string getAsCString(const ConstantArray *CVA) {
579 assert(isStringCompatible(CVA) && "Array is not string compatible!");
582 const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
584 for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
585 unsigned char C = (ETy == Type::SByteTy) ?
586 (unsigned char)cast<ConstantSInt>(CVA->getOperand(i))->getValue() :
587 (unsigned char)cast<ConstantUInt>(CVA->getOperand(i))->getValue();
591 } else if (C == '\\') {
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 numPadBytesAfter /* = 0*/)
791 const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
793 if (CVA && isStringCompatible(CVA))
794 { // print the string alone and return
795 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
798 { // Not a string. Print the values in successive locations
799 const std::vector<Use> &constValues = CVA->getValues();
800 for (unsigned i=0; i < constValues.size(); i++)
801 printConstantValueOnly(cast<Constant>(constValues[i].get()));
803 else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
804 { // Print the fields in successive locations. Pad to align if needed!
805 const StructLayout *cvsLayout =
806 Target.getTargetData().getStructLayout(CVS->getType());
807 const std::vector<Use>& constValues = CVS->getValues();
808 unsigned sizeSoFar = 0;
809 for (unsigned i=0, N = constValues.size(); i < N; i++)
811 const Constant* field = cast<Constant>(constValues[i].get());
813 // Check if padding is needed and insert one or more 0s.
815 Target.getTargetData().getTypeSize(field->getType());
816 int padSize = ((i == N-1? cvsLayout->StructSize
817 : cvsLayout->MemberOffsets[i+1])
818 - cvsLayout->MemberOffsets[i]) - fieldSize;
819 sizeSoFar += (fieldSize + padSize);
821 // Now print the actual field value
822 printConstantValueOnly(field, padSize);
824 assert(sizeSoFar == cvsLayout->StructSize &&
825 "Layout of constant struct may be incorrect!");
828 printSingleConstantValue(CV);
830 if (numPadBytesAfter)
831 PrintZeroBytesToPad(numPadBytesAfter);
834 // Print a constant (which may be an aggregate) prefixed by all the
835 // appropriate directives. Uses printConstantValueOnly() to print the
838 SparcModuleAsmPrinter::printConstant(const Constant* CV, string valID)
840 if (valID.length() == 0)
843 toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
845 // Print .size and .type only if it is not a string.
846 const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
847 if (CVA && isStringCompatible(CVA))
848 { // print it as a string and return
849 toAsm << valID << ":\n";
850 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
854 toAsm << "\t.type" << "\t" << valID << ",#object\n";
856 unsigned int constSize = ConstantToSize(CV, Target);
858 toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
860 toAsm << valID << ":\n";
862 printConstantValueOnly(CV);
866 void SparcModuleAsmPrinter::FoldConstants(const Module &M,
867 hash_set<const Constant*> &MC) {
868 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
869 if (!I->isExternal()) {
870 const hash_set<const Constant*> &pool =
871 MachineFunction::get(I).getInfo()->getConstantPoolValues();
872 MC.insert(pool.begin(), pool.end());
876 void SparcModuleAsmPrinter::printGlobalVariable(const GlobalVariable* GV)
878 if (GV->hasExternalLinkage())
879 toAsm << "\t.global\t" << getID(GV) << "\n";
881 if (GV->hasInitializer() && ! GV->getInitializer()->isNullValue())
882 printConstant(GV->getInitializer(), getID(GV));
884 toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
886 toAsm << "\t.type\t" << getID(GV) << ",#object\n";
887 toAsm << "\t.reserve\t" << getID(GV) << ","
888 << TypeToSize(GV->getType()->getElementType(), Target)
894 void SparcModuleAsmPrinter::emitGlobalsAndConstants(const Module &M) {
895 // First, get the constants there were marked by the code generator for
896 // inclusion in the assembly code data area and fold them all into a
897 // single constant pool since there may be lots of duplicates. Also,
898 // lets force these constants into the slot table so that we can get
899 // unique names for unnamed constants also.
901 hash_set<const Constant*> moduleConstants;
902 FoldConstants(M, moduleConstants);
904 // Output constants spilled to memory
905 enterSection(AsmPrinter::ReadOnlyData);
906 for (hash_set<const Constant*>::const_iterator I = moduleConstants.begin(),
907 E = moduleConstants.end(); I != E; ++I)
910 // Output global variables...
911 for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI)
912 if (! GI->isExternal()) {
913 assert(GI->hasInitializer());
914 if (GI->isConstant())
915 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
916 else if (GI->getInitializer()->isNullValue())
917 enterSection(AsmPrinter::ZeroInitRWData); // read-write zero data
919 enterSection(AsmPrinter::InitRWData); // read-write non-zero data
921 printGlobalVariable(GI);
927 } // End anonymous namespace
929 Pass *UltraSparc::getModuleAsmPrinterPass(std::ostream &Out) {
930 return new SparcModuleAsmPrinter(Out, *this);