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Use the AsmPrinter for global variable init printing. This eliminates a
bunch of code and causes V8 to start using the fancy .asciz directive that the sun assembler supports. llvm-svn: 24766
This commit is contained in:
Chris Lattner
parent
2b66656dd9
commit
91e36127ed
@ -39,6 +39,7 @@ namespace {
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Data16bitsDirective = "\t.half\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = "\t.xword\t";
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ZeroDirective = 0; // no .zero or .space!
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}
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/// We name each basic block in a Function with a unique number, so
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@ -52,8 +53,6 @@ namespace {
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return "SparcV8 Assembly Printer";
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}
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void emitConstantValueOnly(const Constant *CV);
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void emitGlobalConstant(const Constant *CV);
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void printOperand(const MachineInstr *MI, int opNum);
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bool printInstruction(const MachineInstr *MI); // autogenerated.
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bool runOnMachineFunction(MachineFunction &F);
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@ -74,212 +73,6 @@ FunctionPass *llvm::createSparcV8CodePrinterPass (std::ostream &o,
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return new SparcV8AsmPrinter(o, tm);
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}
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/// toOctal - Convert the low order bits of X into an octal digit.
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///
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static inline char toOctal(int X) {
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return (X&7)+'0';
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}
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/// getAsCString - Return the specified array as a C compatible
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/// string, only if the predicate isStringCompatible is true.
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///
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static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
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assert(CVA->isString() && "Array is not string compatible!");
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O << "\"";
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for (unsigned i = 0; i != CVA->getNumOperands(); ++i) {
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unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
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if (C == '"') {
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O << "\\\"";
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} else if (C == '\\') {
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O << "\\\\";
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} else if (isprint(C)) {
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O << C;
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} else {
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switch(C) {
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case '\b': O << "\\b"; break;
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case '\f': O << "\\f"; break;
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case '\n': O << "\\n"; break;
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case '\r': O << "\\r"; break;
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case '\t': O << "\\t"; break;
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default:
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O << '\\';
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O << toOctal(C >> 6);
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O << toOctal(C >> 3);
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O << toOctal(C >> 0);
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break;
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}
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}
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}
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O << "\"";
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}
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// Print out the specified constant, without a storage class. Only the
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// constants valid in constant expressions can occur here.
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void SparcV8AsmPrinter::emitConstantValueOnly(const Constant *CV) {
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if (CV->isNullValue() || isa<UndefValue> (CV))
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O << "0";
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else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
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assert(CB == ConstantBool::True);
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O << "1";
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} else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
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if (((CI->getValue() << 32) >> 32) == CI->getValue())
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O << CI->getValue();
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else
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O << (unsigned long long)CI->getValue();
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else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
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O << CI->getValue();
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else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
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// This is a constant address for a global variable or function. Use the
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// name of the variable or function as the address value.
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O << Mang->getValueName(GV);
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else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
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const TargetData &TD = TM.getTargetData();
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switch(CE->getOpcode()) {
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case Instruction::GetElementPtr: {
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// generate a symbolic expression for the byte address
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const Constant *ptrVal = CE->getOperand(0);
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std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
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if (unsigned Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
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O << "(";
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emitConstantValueOnly(ptrVal);
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O << ") + " << Offset;
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} else {
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emitConstantValueOnly(ptrVal);
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}
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break;
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}
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case Instruction::Cast: {
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// Support only non-converting or widening casts for now, that is, ones
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// that do not involve a change in value. This assertion is really gross,
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// and may not even be a complete check.
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Constant *Op = CE->getOperand(0);
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const Type *OpTy = Op->getType(), *Ty = CE->getType();
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// Pointers on ILP32 machines can be losslessly converted back and
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// forth into 32-bit or wider integers, regardless of signedness.
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assert(((isa<PointerType>(OpTy)
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&& (Ty == Type::LongTy || Ty == Type::ULongTy
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|| Ty == Type::IntTy || Ty == Type::UIntTy))
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|| (isa<PointerType>(Ty)
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&& (OpTy == Type::LongTy || OpTy == Type::ULongTy
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|| OpTy == Type::IntTy || OpTy == Type::UIntTy))
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|| (((TD.getTypeSize(Ty) >= TD.getTypeSize(OpTy))
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&& OpTy->isLosslesslyConvertibleTo(Ty))))
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&& "FIXME: Don't yet support this kind of constant cast expr");
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O << "(";
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emitConstantValueOnly(Op);
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O << ")";
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break;
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}
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case Instruction::Add:
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O << "(";
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emitConstantValueOnly(CE->getOperand(0));
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O << ") + (";
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emitConstantValueOnly(CE->getOperand(1));
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O << ")";
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break;
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default:
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assert(0 && "Unsupported operator!");
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}
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} else {
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assert(0 && "Unknown constant value!");
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}
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}
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// Print a constant value or values, with the appropriate storage class as a
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// prefix.
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void SparcV8AsmPrinter::emitGlobalConstant(const Constant *CV) {
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const TargetData &TD = TM.getTargetData();
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if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
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if (CVA->isString()) {
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O << "\t.ascii\t";
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printAsCString(O, CVA);
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O << "\n";
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} else { // Not a string. Print the values in successive locations
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for (unsigned i = 0, e = CVA->getNumOperands(); i != e; i++)
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emitGlobalConstant(CVA->getOperand(i));
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}
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return;
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} else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
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// Print the fields in successive locations. Pad to align if needed!
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const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType());
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unsigned sizeSoFar = 0;
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for (unsigned i = 0, e = CVS->getNumOperands(); i != e; i++) {
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const Constant* field = CVS->getOperand(i);
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// Check if padding is needed and insert one or more 0s.
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unsigned fieldSize = TD.getTypeSize(field->getType());
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unsigned padSize = ((i == e-1? cvsLayout->StructSize
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: cvsLayout->MemberOffsets[i+1])
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- cvsLayout->MemberOffsets[i]) - fieldSize;
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sizeSoFar += fieldSize + padSize;
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// Now print the actual field value
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emitGlobalConstant(field);
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// Insert the field padding unless it's zero bytes...
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if (padSize)
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O << "\t.skip\t " << padSize << "\n";
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}
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assert(sizeSoFar == cvsLayout->StructSize &&
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"Layout of constant struct may be incorrect!");
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return;
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} else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
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// FP Constants are printed as integer constants to avoid losing
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// precision...
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double Val = CFP->getValue();
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switch (CFP->getType()->getTypeID()) {
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default: assert(0 && "Unknown floating point type!");
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case Type::FloatTyID: {
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O << ".long\t" << FloatToBits(Val) << "\t! float " << Val << "\n";
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return;
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}
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case Type::DoubleTyID: {
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O << ".word\t0x" << std::hex << (DoubleToBits(Val) >> 32) << std::dec << "\t! double " << Val << "\n";
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O << ".word\t0x" << std::hex << (DoubleToBits(Val) & 0xffffffffUL) << std::dec << "\t! double " << Val << "\n";
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return;
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}
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}
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} else if (isa<UndefValue> (CV)) {
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unsigned size = TD.getTypeSize (CV->getType ());
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O << "\t.skip\t " << size << "\n";
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return;
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} else if (isa<ConstantAggregateZero> (CV)) {
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unsigned size = TD.getTypeSize (CV->getType ());
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for (unsigned i = 0; i < size; ++i)
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O << "\t.byte 0\n";
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return;
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}
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const Type *type = CV->getType();
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O << "\t";
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switch (type->getTypeID()) {
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case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
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O << ".byte";
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break;
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case Type::UShortTyID: case Type::ShortTyID:
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O << ".half";
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break;
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case Type::FloatTyID: case Type::PointerTyID:
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case Type::UIntTyID: case Type::IntTyID:
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O << ".word";
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break;
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case Type::DoubleTyID:
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case Type::ULongTyID: case Type::LongTyID:
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O << ".xword";
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break;
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default:
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assert (0 && "Can't handle printing this type of thing");
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break;
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}
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O << "\t";
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emitConstantValueOnly(CV);
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O << "\n";
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}
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/// runOnMachineFunction - This uses the printMachineInstruction()
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/// method to print assembly for each instruction.
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///
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@ -455,7 +248,7 @@ bool SparcV8AsmPrinter::doFinalization(Module &M) {
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O << " = ";
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WriteAsOperand(O, C, false, false, &M);
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O << "\n";
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emitGlobalConstant(C);
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EmitGlobalConstant(C);
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}
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}
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