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) {
123 if (C == '_' || C == '.' || C == '$' || isalpha(C) || isdigit(C))
127 Result += char('0' + ((unsigned char)C >> 4));
128 Result += char('0' + (C & 0xF));
134 // getID - Return a valid identifier for the specified value. Base it on
135 // the name of the identifier if possible (qualified by the type), and
136 // use a numbered value based on prefix otherwise.
137 // FPrefix is always prepended to the output identifier.
139 string getID(const Value *V, const char *Prefix, const char *FPrefix = 0) {
140 string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
142 Result += V->hasName() ? V->getName() : string(Prefix);
144 // Qualify all internal names with a unique id.
145 if (!isExternal(V)) {
146 int valId = idTable->Table.getValSlot(V);
148 GlobalIdTable::ValIdMapConstIterator I = idTable->valToIdMap.find(V);
149 if (I == idTable->valToIdMap.end())
150 valId = idTable->valToIdMap[V] = idTable->valToIdMap.size();
154 Result = Result + "_" + itostr(valId);
156 // Replace or prefix problem characters in the name
157 Result = getValidSymbolName(Result);
163 // getID Wrappers - Ensure consistent usage...
164 string getID(const Function *F) {
165 return getID(F, "LLVMFunction_");
167 string getID(const BasicBlock *BB) {
168 return getID(BB, "LL", (".L_"+getID(BB->getParent())+"_").c_str());
170 string getID(const GlobalVariable *GV) {
171 return getID(GV, "LLVMGlobal_");
173 string getID(const Constant *CV) {
174 return getID(CV, "LLVMConst_", ".C_");
176 string getID(const GlobalValue *GV) {
177 if (const GlobalVariable *V = dyn_cast<GlobalVariable>(GV))
179 else if (const Function *F = dyn_cast<Function>(GV))
181 assert(0 && "Unexpected type of GlobalValue!");
185 // ConstantExprToString() - Convert a ConstantExpr to an asm expression
186 // and return this as a string.
187 string ConstantExprToString(const ConstantExpr* CE,
188 const TargetMachine& target) {
190 switch(CE->getOpcode()) {
191 case Instruction::GetElementPtr: {
192 // generate a symbolic expression for the byte address
193 const Value* ptrVal = CE->getOperand(0);
194 std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
195 const TargetData &TD = target.getTargetData();
196 S += "(" + valToExprString(ptrVal, target) + ") + ("
197 + utostr(TD.getIndexedOffset(ptrVal->getType(),idxVec)) + ")";
201 case Instruction::Cast:
202 // Support only non-converting casts for now, i.e., a no-op.
203 // This assertion is not a complete check.
204 assert(target.getTargetData().getTypeSize(CE->getType()) ==
205 target.getTargetData().getTypeSize(CE->getOperand(0)->getType()));
206 S += "(" + valToExprString(CE->getOperand(0), target) + ")";
209 case Instruction::Add:
210 S += "(" + valToExprString(CE->getOperand(0), target) + ") + ("
211 + valToExprString(CE->getOperand(1), target) + ")";
215 assert(0 && "Unsupported operator in ConstantExprToString()");
222 // valToExprString - Helper function for ConstantExprToString().
223 // Appends result to argument string S.
225 string valToExprString(const Value* V, const TargetMachine& target) {
228 if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
230 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
231 S += string(CB == ConstantBool::True ? "1" : "0");
232 else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
233 S += itostr(CI->getValue());
234 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
235 S += utostr(CI->getValue());
236 else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
237 S += ftostr(CFP->getValue());
238 else if (isa<ConstantPointerNull>(CV))
240 else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
241 S += valToExprString(CPR->getValue(), target);
242 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
243 S += ConstantExprToString(CE, target);
247 } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
254 assert(0 && "Cannot convert value to string");
255 S += "<illegal-value>";
264 //===----------------------------------------------------------------------===//
265 // SparcFunctionAsmPrinter Code
266 //===----------------------------------------------------------------------===//
268 struct SparcFunctionAsmPrinter : public FunctionPass, public AsmPrinter {
269 inline SparcFunctionAsmPrinter(std::ostream &os, const TargetMachine &t)
270 : AsmPrinter(os, t) {}
272 const char *getPassName() const {
273 return "Output Sparc Assembly for Functions";
276 virtual bool doInitialization(Module &M) {
281 virtual bool runOnFunction(Function &F) {
288 virtual bool doFinalization(Module &M) {
293 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
294 AU.setPreservesAll();
297 void emitFunction(const Function &F);
299 void emitBasicBlock(const MachineBasicBlock &MBB);
300 void emitMachineInst(const MachineInstr *MI);
302 unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
303 void printOneOperand(const MachineOperand &Op, MachineOpCode opCode);
305 bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
306 bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
308 unsigned getOperandMask(unsigned Opcode) {
311 case V9::SUBcci: return 1 << 3; // Remove CC argument
312 //case BA: return 1 << 0; // Remove Arg #0, which is always null or xcc
313 default: return 0; // By default, don't hack operands...
319 SparcFunctionAsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
320 unsigned int opNum) {
321 switch (MI->getOpCode()) {
334 SparcFunctionAsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
335 unsigned int opNum) {
336 if (Target.getInstrInfo().isLoad(MI->getOpCode()))
338 else if (Target.getInstrInfo().isStore(MI->getOpCode()))
345 #define PrintOp1PlusOp2(mop1, mop2, opCode) \
346 printOneOperand(mop1, opCode); \
348 printOneOperand(mop2, opCode);
351 SparcFunctionAsmPrinter::printOperands(const MachineInstr *MI,
354 const MachineOperand& mop = MI->getOperand(opNum);
356 if (OpIsBranchTargetLabel(MI, opNum)) {
357 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpCode());
359 } else if (OpIsMemoryAddressBase(MI, opNum)) {
361 PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpCode());
365 printOneOperand(mop, MI->getOpCode());
371 SparcFunctionAsmPrinter::printOneOperand(const MachineOperand &mop,
372 MachineOpCode opCode)
374 bool needBitsFlag = true;
376 if (mop.opHiBits32())
378 else if (mop.opLoBits32())
380 else if (mop.opHiBits64())
382 else if (mop.opLoBits64())
385 needBitsFlag = false;
387 switch (mop.getType())
389 case MachineOperand::MO_VirtualRegister:
390 case MachineOperand::MO_CCRegister:
391 case MachineOperand::MO_MachineRegister: {
392 int regNum = (int)mop.getAllocatedRegNum();
394 if (regNum == Target.getRegInfo().getInvalidRegNum()) {
395 // better to print code with NULL registers than to die
396 toAsm << "<NULL VALUE>";
398 toAsm << "%" << Target.getRegInfo().getUnifiedRegName(regNum);
403 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 (Target.getInstrInfo().isDummyPhiInstr(Opcode))
444 return; // Ignore Phi nodes
446 toAsm << "\t" << Target.getInstrInfo().getName(Opcode) << "\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);
464 SparcFunctionAsmPrinter::emitBasicBlock(const MachineBasicBlock &MBB)
466 // Emit a label for the basic block
467 toAsm << getID(MBB.getBasicBlock()) << ":\n";
469 // Loop over all of the instructions in the basic block...
470 for (MachineBasicBlock::const_iterator MII = MBB.begin(), MIE = MBB.end();
472 emitMachineInst(*MII);
473 toAsm << "\n"; // Seperate BB's with newlines
477 SparcFunctionAsmPrinter::emitFunction(const Function &F)
479 string methName = getID(&F);
480 toAsm << "!****** Outputing Function: " << methName << " ******\n";
481 enterSection(AsmPrinter::Text);
482 toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
483 //toAsm << "\t.type\t" << methName << ",#function\n";
484 toAsm << "\t.type\t" << methName << ", 2\n";
485 toAsm << methName << ":\n";
487 // Output code for all of the basic blocks in the function...
488 MachineFunction &MF = MachineFunction::get(&F);
489 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); I != E;++I)
492 // Output a .size directive so the debugger knows the extents of the function
493 toAsm << ".EndOf_" << methName << ":\n\t.size "
494 << methName << ", .EndOf_"
495 << methName << "-" << methName << "\n";
497 // Put some spaces between the functions
501 } // End anonymous namespace
503 Pass *UltraSparc::getFunctionAsmPrinterPass(std::ostream &Out) {
504 return new SparcFunctionAsmPrinter(Out, *this);
511 //===----------------------------------------------------------------------===//
512 // SparcFunctionAsmPrinter Code
513 //===----------------------------------------------------------------------===//
517 class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
519 SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
520 : AsmPrinter(os, t) {}
522 const char *getPassName() const { return "Output Sparc Assembly for Module"; }
524 virtual bool run(Module &M) {
526 emitGlobalsAndConstants(M);
531 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
532 AU.setPreservesAll();
536 void emitGlobalsAndConstants (const Module &M);
538 void printGlobalVariable (const GlobalVariable *GV);
539 void PrintZeroBytesToPad (int numBytes);
540 void printSingleConstantValue (const Constant* CV);
541 void printConstantValueOnly (const Constant* CV, int numPadBytesAfter = 0);
542 void printConstant (const Constant* CV, 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 *CVA) {
553 const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
554 if (ETy == Type::UByteTy) return true;
555 if (ETy != Type::SByteTy) return false;
557 for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
558 if (cast<ConstantSInt>(CVA->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 *CVA) {
573 assert(isStringCompatible(CVA) && "Array is not string compatible!");
576 const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
578 for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
579 unsigned char C = (ETy == Type::SByteTy) ?
580 (unsigned char)cast<ConstantSInt>(CVA->getOperand(i))->getValue() :
581 (unsigned char)cast<ConstantUInt>(CVA->getOperand(i))->getValue();
585 } else if (C == '\\') {
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 type
650 TypeToSize(const Type* type, const TargetMachine& target)
652 return target.findOptimalStorageSize(type);
655 // Get the size of the constant for the given target.
656 // If this is an unsized array, return 0.
659 ConstantToSize(const Constant* CV, const TargetMachine& target)
661 if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV)) {
662 const ArrayType *aty = cast<ArrayType>(CVA->getType());
663 if (ArrayTypeIsString(aty))
664 return 1 + CVA->getNumOperands();
667 return TypeToSize(CV->getType(), target);
670 // Align data larger than one L1 cache line on L1 cache line boundaries.
671 // Align all smaller data on the next higher 2^x boundary (4, 8, ...).
674 SizeToAlignment(unsigned int size, const TargetMachine& target)
676 unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
677 if (size > (unsigned) cacheLineSize / 2)
678 return cacheLineSize;
680 for (unsigned sz=1; /*no condition*/; sz *= 2)
685 // Get the size of the type and then use SizeToAlignment.
688 TypeToAlignment(const Type* type, const TargetMachine& target)
690 return SizeToAlignment(TypeToSize(type, target), target);
693 // Get the size of the constant and then use SizeToAlignment.
694 // Handles strings as a special case;
696 ConstantToAlignment(const Constant* CV, const TargetMachine& target)
698 if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
699 if (ArrayTypeIsString(cast<ArrayType>(CVA->getType())))
700 return SizeToAlignment(1 + CVA->getNumOperands(), target);
702 return TypeToAlignment(CV->getType(), target);
706 // Print a single constant value.
708 SparcModuleAsmPrinter::printSingleConstantValue(const Constant* CV)
710 assert(CV->getType() != Type::VoidTy &&
711 CV->getType() != Type::TypeTy &&
712 CV->getType() != Type::LabelTy &&
713 "Unexpected type for Constant");
715 assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
716 && "Aggregate types should be handled outside this function");
718 toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
720 if (CV->getType()->isPrimitiveType()) {
721 if (CV->getType()->isFloatingPoint()) {
722 // FP Constants are printed as integer constants to avoid losing
724 double Val = cast<ConstantFP>(CV)->getValue();
725 if (CV->getType() == Type::FloatTy) {
726 float FVal = (float)Val;
727 char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
728 toAsm << *(unsigned int*)ProxyPtr;
729 } else if (CV->getType() == Type::DoubleTy) {
730 char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
731 toAsm << *(uint64_t*)ProxyPtr;
733 assert(0 && "Unknown floating point type!");
736 toAsm << "\t! " << CV->getType()->getDescription()
737 << " value: " << Val << "\n";
739 WriteAsOperand(toAsm, CV, false, false) << "\n";
741 } else if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV)) {
742 // This is a constant address for a global variable or method.
743 // Use the name of the variable or method as the address value.
744 toAsm << getID(CPR->getValue()) << "\n";
745 } else if (isa<ConstantPointerNull>(CV)) {
746 // Null pointer value
748 } else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV)) {
749 // Constant expression built from operators, constants, and symbolic addrs
750 toAsm << ConstantExprToString(CE, Target) << "\n";
752 assert(0 && "Unknown elementary type for constant");
757 SparcModuleAsmPrinter::PrintZeroBytesToPad(int numBytes)
759 for ( ; numBytes >= 8; numBytes -= 8)
760 printSingleConstantValue(Constant::getNullValue(Type::ULongTy));
763 printSingleConstantValue(Constant::getNullValue(Type::UIntTy));
768 printSingleConstantValue(Constant::getNullValue(Type::UByteTy));
771 // Print a constant value or values (it may be an aggregate).
772 // Uses printSingleConstantValue() to print each individual value.
774 SparcModuleAsmPrinter::printConstantValueOnly(const Constant* CV,
775 int numPadBytesAfter /* = 0*/)
777 const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
779 if (CVA && isStringCompatible(CVA)) {
780 // print the string alone and return
781 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
783 // Not a string. Print the values in successive locations
784 const std::vector<Use> &constValues = CVA->getValues();
785 for (unsigned i=0; i < constValues.size(); i++)
786 printConstantValueOnly(cast<Constant>(constValues[i].get()));
787 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
788 // Print the fields in successive locations. Pad to align if needed!
789 const StructLayout *cvsLayout =
790 Target.getTargetData().getStructLayout(CVS->getType());
791 const std::vector<Use>& constValues = CVS->getValues();
792 unsigned sizeSoFar = 0;
793 for (unsigned i=0, N = constValues.size(); i < N; i++) {
794 const Constant* field = cast<Constant>(constValues[i].get());
796 // Check if padding is needed and insert one or more 0s.
798 Target.getTargetData().getTypeSize(field->getType());
799 int padSize = ((i == N-1? cvsLayout->StructSize
800 : cvsLayout->MemberOffsets[i+1])
801 - cvsLayout->MemberOffsets[i]) - fieldSize;
802 sizeSoFar += (fieldSize + padSize);
804 // Now print the actual field value
805 printConstantValueOnly(field, padSize);
807 assert(sizeSoFar == cvsLayout->StructSize &&
808 "Layout of constant struct may be incorrect!");
810 printSingleConstantValue(CV);
812 if (numPadBytesAfter)
813 PrintZeroBytesToPad(numPadBytesAfter);
816 // Print a constant (which may be an aggregate) prefixed by all the
817 // appropriate directives. Uses printConstantValueOnly() to print the
820 SparcModuleAsmPrinter::printConstant(const Constant* CV, string valID)
822 if (valID.length() == 0)
825 toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
827 // Print .size and .type only if it is not a string.
828 const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
829 if (CVA && isStringCompatible(CVA)) {
830 // print it as a string and return
831 toAsm << valID << ":\n";
832 toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
836 toAsm << "\t.type" << "\t" << valID << ",#object\n";
838 unsigned int constSize = ConstantToSize(CV, Target);
840 toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
842 toAsm << valID << ":\n";
844 printConstantValueOnly(CV);
848 void SparcModuleAsmPrinter::FoldConstants(const Module &M,
849 hash_set<const Constant*> &MC) {
850 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
851 if (!I->isExternal()) {
852 const hash_set<const Constant*> &pool =
853 MachineFunction::get(I).getInfo()->getConstantPoolValues();
854 MC.insert(pool.begin(), pool.end());
858 void SparcModuleAsmPrinter::printGlobalVariable(const GlobalVariable* GV)
860 if (GV->hasExternalLinkage())
861 toAsm << "\t.global\t" << getID(GV) << "\n";
863 if (GV->hasInitializer() && ! GV->getInitializer()->isNullValue())
864 printConstant(GV->getInitializer(), getID(GV));
866 toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
868 toAsm << "\t.type\t" << getID(GV) << ",#object\n";
869 toAsm << "\t.reserve\t" << getID(GV) << ","
870 << TypeToSize(GV->getType()->getElementType(), Target)
876 void SparcModuleAsmPrinter::emitGlobalsAndConstants(const Module &M) {
877 // First, get the constants there were marked by the code generator for
878 // inclusion in the assembly code data area and fold them all into a
879 // single constant pool since there may be lots of duplicates. Also,
880 // lets force these constants into the slot table so that we can get
881 // unique names for unnamed constants also.
883 hash_set<const Constant*> moduleConstants;
884 FoldConstants(M, moduleConstants);
886 // Output constants spilled to memory
887 enterSection(AsmPrinter::ReadOnlyData);
888 for (hash_set<const Constant*>::const_iterator I = moduleConstants.begin(),
889 E = moduleConstants.end(); I != E; ++I)
892 // Output global variables...
893 for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI)
894 if (! GI->isExternal()) {
895 assert(GI->hasInitializer());
896 if (GI->isConstant())
897 enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
898 else if (GI->getInitializer()->isNullValue())
899 enterSection(AsmPrinter::ZeroInitRWData); // read-write zero data
901 enterSection(AsmPrinter::InitRWData); // read-write non-zero data
903 printGlobalVariable(GI);
909 } // End anonymous namespace
911 Pass *UltraSparc::getModuleAsmPrinterPass(std::ostream &Out) {
912 return new SparcModuleAsmPrinter(Out, *this);