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llvm-6502/lib/Target/SparcV9/SparcV9AsmPrinter.cpp
Brian Gaeke 05b15fb075 TargetCacheInfo has been removed; its only uses were to propagate a constant 
(16) into certain areas of the SPARC V9 back-end. I'm fairly sure the US IIIi's
dcache has 32-byte lines, so I'm not sure where the 16 came from. However, in
the interest of not breaking things any more than they already are, I'm going
to leave the constant alone.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12043 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-01 06:43:29 +00:00

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//===-- EmitAssembly.cpp - Emit SparcV9 Specific .s File ---------------------==//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements all of the stuff necessary to output a .s file from
// LLVM. The code in this file assumes that the specified module has already
// been compiled into the internal data structures of the Module.
//
// This code largely consists of two LLVM Pass's: a FunctionPass and a Pass.
// The FunctionPass is pipelined together with all of the rest of the code
// generation stages, and the Pass runs at the end to emit code for global
// variables and such.
//
//===----------------------------------------------------------------------===//
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Support/Mangler.h"
#include "Support/StringExtras.h"
#include "Support/Statistic.h"
#include "SparcV9Internals.h"
#include <string>
using namespace llvm;
namespace {
Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
//===--------------------------------------------------------------------===//
// Utility functions
/// getAsCString - Return the specified array as a C compatible string, only
/// if the predicate isString() is true.
///
std::string getAsCString(const ConstantArray *CVA) {
assert(CVA->isString() && "Array is not string compatible!");
std::string Result = "\"";
for (unsigned i = 0; i != CVA->getNumOperands(); ++i) {
unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
if (C == '"') {
Result += "\\\"";
} else if (C == '\\') {
Result += "\\\\";
} else if (isprint(C)) {
Result += C;
} else {
Result += '\\'; // print all other chars as octal value
// Convert C to octal representation
Result += ((C >> 6) & 7) + '0';
Result += ((C >> 3) & 7) + '0';
Result += ((C >> 0) & 7) + '0';
}
}
Result += "\"";
return Result;
}
inline bool ArrayTypeIsString(const ArrayType* arrayType) {
return (arrayType->getElementType() == Type::UByteTy ||
arrayType->getElementType() == Type::SByteTy);
}
inline const std::string
TypeToDataDirective(const Type* type) {
switch(type->getPrimitiveID())
{
case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
return ".byte";
case Type::UShortTyID: case Type::ShortTyID:
return ".half";
case Type::UIntTyID: case Type::IntTyID:
return ".word";
case Type::ULongTyID: case Type::LongTyID: case Type::PointerTyID:
return ".xword";
case Type::FloatTyID:
return ".word";
case Type::DoubleTyID:
return ".xword";
case Type::ArrayTyID:
if (ArrayTypeIsString((ArrayType*) type))
return ".ascii";
else
return "<InvaliDataTypeForPrinting>";
default:
return "<InvaliDataTypeForPrinting>";
}
}
/// Get the size of the constant for the given target.
/// If this is an unsized array, return 0.
///
inline unsigned int
ConstantToSize(const Constant* CV, const TargetMachine& target) {
if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV)) {
const ArrayType *aty = cast<ArrayType>(CVA->getType());
if (ArrayTypeIsString(aty))
return 1 + CVA->getNumOperands();
}
return target.findOptimalStorageSize(CV->getType());
}
/// Align data larger than one L1 cache line on L1 cache line boundaries.
/// Align all smaller data on the next higher 2^x boundary (4, 8, ...).
///
inline unsigned int
SizeToAlignment(unsigned int size, const TargetMachine& target) {
const unsigned short cacheLineSize = 16;
if (size > (unsigned) cacheLineSize / 2)
return cacheLineSize;
else
for (unsigned sz=1; /*no condition*/; sz *= 2)
if (sz >= size)
return sz;
}
/// Get the size of the type and then use SizeToAlignment.
///
inline unsigned int
TypeToAlignment(const Type* type, const TargetMachine& target) {
return SizeToAlignment(target.findOptimalStorageSize(type), target);
}
/// Get the size of the constant and then use SizeToAlignment.
/// Handles strings as a special case;
inline unsigned int
ConstantToAlignment(const Constant* CV, const TargetMachine& target) {
if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
if (ArrayTypeIsString(cast<ArrayType>(CVA->getType())))
return SizeToAlignment(1 + CVA->getNumOperands(), target);
return TypeToAlignment(CV->getType(), target);
}
} // End anonymous namespace
//===---------------------------------------------------------------------===//
// Code abstracted away from the AsmPrinter
//===---------------------------------------------------------------------===//
namespace {
class AsmPrinter {
// Mangle symbol names appropriately
Mangler *Mang;
public:
std::ostream &toAsm;
const TargetMachine &Target;
enum Sections {
Unknown,
Text,
ReadOnlyData,
InitRWData,
ZeroInitRWData,
} CurSection;
AsmPrinter(std::ostream &os, const TargetMachine &T)
: /* idTable(0), */ toAsm(os), Target(T), CurSection(Unknown) {}
~AsmPrinter() {
delete Mang;
}
// (start|end)(Module|Function) - Callback methods invoked by subclasses
void startModule(Module &M) {
Mang = new Mangler(M);
}
void PrintZeroBytesToPad(int numBytes) {
//
// Always use single unsigned bytes for padding. We don't know upon
// what data size the beginning address is aligned, so using anything
// other than a byte may cause alignment errors in the assembler.
//
while (numBytes--)
printSingleConstantValue(Constant::getNullValue(Type::UByteTy));
}
/// Print a single constant value.
///
void printSingleConstantValue(const Constant* CV);
/// Print a constant value or values (it may be an aggregate).
/// Uses printSingleConstantValue() to print each individual value.
///
void printConstantValueOnly(const Constant* CV, int numPadBytesAfter = 0);
// Print a constant (which may be an aggregate) prefixed by all the
// appropriate directives. Uses printConstantValueOnly() to print the
// value or values.
void printConstant(const Constant* CV, std::string valID = "") {
if (valID.length() == 0)
valID = getID(CV);
toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
// Print .size and .type only if it is not a string.
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
if (CVA->isString()) {
// print it as a string and return
toAsm << valID << ":\n";
toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
return;
}
toAsm << "\t.type" << "\t" << valID << ",#object\n";
unsigned int constSize = ConstantToSize(CV, Target);
if (constSize)
toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
toAsm << valID << ":\n";
printConstantValueOnly(CV);
}
// enterSection - Use this method to enter a different section of the output
// executable. This is used to only output necessary section transitions.
//
void enterSection(enum Sections S) {
if (S == CurSection) return; // Only switch section if necessary
CurSection = S;
toAsm << "\n\t.section ";
switch (S)
{
default: assert(0 && "Bad section name!");
case Text: toAsm << "\".text\""; break;
case ReadOnlyData: toAsm << "\".rodata\",#alloc"; break;
case InitRWData: toAsm << "\".data\",#alloc,#write"; break;
case ZeroInitRWData: toAsm << "\".bss\",#alloc,#write"; break;
}
toAsm << "\n";
}
// getID Wrappers - Ensure consistent usage
// Symbol names in SparcV9 assembly language have these rules:
// (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
// (b) A name beginning in "." is treated as a local name.
std::string getID(const Function *F) {
return Mang->getValueName(F);
}
std::string getID(const BasicBlock *BB) {
return ".L_" + getID(BB->getParent()) + "_" + Mang->getValueName(BB);
}
std::string getID(const GlobalVariable *GV) {
return Mang->getValueName(GV);
}
std::string getID(const Constant *CV) {
return ".C_" + Mang->getValueName(CV);
}
std::string getID(const GlobalValue *GV) {
if (const GlobalVariable *V = dyn_cast<GlobalVariable>(GV))
return getID(V);
else if (const Function *F = dyn_cast<Function>(GV))
return getID(F);
assert(0 && "Unexpected type of GlobalValue!");
return "";
}
// Combines expressions
inline std::string ConstantArithExprToString(const ConstantExpr* CE,
const TargetMachine &TM,
const std::string &op) {
return "(" + valToExprString(CE->getOperand(0), TM) + op
+ valToExprString(CE->getOperand(1), TM) + ")";
}
/// ConstantExprToString() - Convert a ConstantExpr to an asm expression
/// and return this as a string.
///
std::string ConstantExprToString(const ConstantExpr* CE,
const TargetMachine& target);
/// valToExprString - Helper function for ConstantExprToString().
/// Appends result to argument string S.
///
std::string valToExprString(const Value* V, const TargetMachine& target);
};
} // End anonymous namespace
/// Print a single constant value.
///
void AsmPrinter::printSingleConstantValue(const Constant* CV) {
assert(CV->getType() != Type::VoidTy &&
CV->getType() != Type::TypeTy &&
CV->getType() != Type::LabelTy &&
"Unexpected type for Constant");
assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
&& "Aggregate types should be handled outside this function");
toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV)) {
// This is a constant address for a global variable or method.
// Use the name of the variable or method as the address value.
assert(isa<GlobalValue>(CPR->getValue()) && "Unexpected non-global");
toAsm << getID(CPR->getValue()) << "\n";
} else if (isa<ConstantPointerNull>(CV)) {
// Null pointer value
toAsm << "0\n";
} else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV)) {
// Constant expression built from operators, constants, and symbolic addrs
toAsm << ConstantExprToString(CE, Target) << "\n";
} else if (CV->getType()->isPrimitiveType()) {
// Check primitive types last
if (CV->getType()->isFloatingPoint()) {
// FP Constants are printed as integer constants to avoid losing
// precision...
double Val = cast<ConstantFP>(CV)->getValue();
if (CV->getType() == Type::FloatTy) {
float FVal = (float)Val;
char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
toAsm << *(unsigned int*)ProxyPtr;
} else if (CV->getType() == Type::DoubleTy) {
char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
toAsm << *(uint64_t*)ProxyPtr;
} else {
assert(0 && "Unknown floating point type!");
}
toAsm << "\t! " << CV->getType()->getDescription()
<< " value: " << Val << "\n";
} else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
toAsm << (int)CB->getValue() << "\n";
} else {
WriteAsOperand(toAsm, CV, false, false) << "\n";
}
} else {
assert(0 && "Unknown elementary type for constant");
}
}
/// Print a constant value or values (it may be an aggregate).
/// Uses printSingleConstantValue() to print each individual value.
///
void AsmPrinter::printConstantValueOnly(const Constant* CV,
int numPadBytesAfter) {
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
if (CVA->isString()) {
// print the string alone and return
toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
} else {
// Not a string. Print the values in successive locations
const std::vector<Use> &constValues = CVA->getValues();
for (unsigned i=0; i < constValues.size(); i++)
printConstantValueOnly(cast<Constant>(constValues[i].get()));
}
} else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
// Print the fields in successive locations. Pad to align if needed!
const StructLayout *cvsLayout =
Target.getTargetData().getStructLayout(CVS->getType());
const std::vector<Use>& constValues = CVS->getValues();
unsigned sizeSoFar = 0;
for (unsigned i=0, N = constValues.size(); i < N; i++) {
const Constant* field = cast<Constant>(constValues[i].get());
// Check if padding is needed and insert one or more 0s.
unsigned fieldSize =
Target.getTargetData().getTypeSize(field->getType());
int padSize = ((i == N-1? cvsLayout->StructSize
: cvsLayout->MemberOffsets[i+1])
- cvsLayout->MemberOffsets[i]) - fieldSize;
sizeSoFar += (fieldSize + padSize);
// Now print the actual field value
printConstantValueOnly(field, padSize);
}
assert(sizeSoFar == cvsLayout->StructSize &&
"Layout of constant struct may be incorrect!");
} else if (isa<ConstantAggregateZero>(CV)) {
PrintZeroBytesToPad(Target.getTargetData().getTypeSize(CV->getType()));
} else
printSingleConstantValue(CV);
if (numPadBytesAfter)
PrintZeroBytesToPad(numPadBytesAfter);
}
/// ConstantExprToString() - Convert a ConstantExpr to an asm expression
/// and return this as a string.
///
std::string AsmPrinter::ConstantExprToString(const ConstantExpr* CE,
const TargetMachine& target) {
std::string S;
switch(CE->getOpcode()) {
case Instruction::GetElementPtr:
{ // generate a symbolic expression for the byte address
const Value* ptrVal = CE->getOperand(0);
std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
const TargetData &TD = target.getTargetData();
S += "(" + valToExprString(ptrVal, target) + ") + ("
+ utostr(TD.getIndexedOffset(ptrVal->getType(),idxVec)) + ")";
break;
}
case Instruction::Cast:
// Support only non-converting casts for now, i.e., a no-op.
// This assertion is not a complete check.
assert(target.getTargetData().getTypeSize(CE->getType()) ==
target.getTargetData().getTypeSize(CE->getOperand(0)->getType()));
S += "(" + valToExprString(CE->getOperand(0), target) + ")";
break;
case Instruction::Add:
S += ConstantArithExprToString(CE, target, ") + (");
break;
case Instruction::Sub:
S += ConstantArithExprToString(CE, target, ") - (");
break;
case Instruction::Mul:
S += ConstantArithExprToString(CE, target, ") * (");
break;
case Instruction::Div:
S += ConstantArithExprToString(CE, target, ") / (");
break;
case Instruction::Rem:
S += ConstantArithExprToString(CE, target, ") % (");
break;
case Instruction::And:
// Logical && for booleans; bitwise & otherwise
S += ConstantArithExprToString(CE, target,
((CE->getType() == Type::BoolTy)? ") && (" : ") & ("));
break;
case Instruction::Or:
// Logical || for booleans; bitwise | otherwise
S += ConstantArithExprToString(CE, target,
((CE->getType() == Type::BoolTy)? ") || (" : ") | ("));
break;
case Instruction::Xor:
// Bitwise ^ for all types
S += ConstantArithExprToString(CE, target, ") ^ (");
break;
default:
assert(0 && "Unsupported operator in ConstantExprToString()");
break;
}
return S;
}
/// valToExprString - Helper function for ConstantExprToString().
/// Appends result to argument string S.
///
std::string AsmPrinter::valToExprString(const Value* V,
const TargetMachine& target) {
std::string S;
bool failed = false;
if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
S += std::string(CB == ConstantBool::True ? "1" : "0");
else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
S += itostr(CI->getValue());
else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
S += utostr(CI->getValue());
else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
S += ftostr(CFP->getValue());
else if (isa<ConstantPointerNull>(CV))
S += "0";
else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
S += valToExprString(CPR->getValue(), target);
else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
S += ConstantExprToString(CE, target);
else
failed = true;
} else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
S += getID(GV);
} else
failed = true;
if (failed) {
assert(0 && "Cannot convert value to string");
S += "<illegal-value>";
}
return S;
}
//===----------------------------------------------------------------------===//
// SparcV9AsmPrinter Code
//===----------------------------------------------------------------------===//
namespace {
struct SparcV9AsmPrinter : public FunctionPass, public AsmPrinter {
inline SparcV9AsmPrinter(std::ostream &os, const TargetMachine &t)
: AsmPrinter(os, t) {}
const Function *currFunction;
const char *getPassName() const {
return "Output SparcV9 Assembly for Functions";
}
virtual bool doInitialization(Module &M) {
startModule(M);
return false;
}
virtual bool runOnFunction(Function &F) {
currFunction = &F;
emitFunction(F);
return false;
}
virtual bool doFinalization(Module &M) {
emitGlobals(M);
return false;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
void emitFunction(const Function &F);
private :
void emitBasicBlock(const MachineBasicBlock &MBB);
void emitMachineInst(const MachineInstr *MI);
unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
void printOneOperand(const MachineOperand &Op, MachineOpCode opCode);
bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
unsigned getOperandMask(unsigned Opcode) {
switch (Opcode) {
case V9::SUBccr:
case V9::SUBcci: return 1 << 3; // Remove CC argument
default: return 0; // By default, don't hack operands...
}
}
void emitGlobals(const Module &M);
void printGlobalVariable(const GlobalVariable *GV);
};
} // End anonymous namespace
inline bool
SparcV9AsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
unsigned int opNum) {
switch (MI->getOpcode()) {
case V9::JMPLCALLr:
case V9::JMPLCALLi:
case V9::JMPLRETr:
case V9::JMPLRETi:
return (opNum == 0);
default:
return false;
}
}
inline bool
SparcV9AsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
unsigned int opNum) {
if (Target.getInstrInfo().isLoad(MI->getOpcode()))
return (opNum == 0);
else if (Target.getInstrInfo().isStore(MI->getOpcode()))
return (opNum == 1);
else
return false;
}
#define PrintOp1PlusOp2(mop1, mop2, opCode) \
printOneOperand(mop1, opCode); \
toAsm << "+"; \
printOneOperand(mop2, opCode);
unsigned int
SparcV9AsmPrinter::printOperands(const MachineInstr *MI,
unsigned int opNum)
{
const MachineOperand& mop = MI->getOperand(opNum);
if (OpIsBranchTargetLabel(MI, opNum)) {
PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpcode());
return 2;
} else if (OpIsMemoryAddressBase(MI, opNum)) {
toAsm << "[";
PrintOp1PlusOp2(mop, MI->getOperand(opNum+1), MI->getOpcode());
toAsm << "]";
return 2;
} else {
printOneOperand(mop, MI->getOpcode());
return 1;
}
}
void
SparcV9AsmPrinter::printOneOperand(const MachineOperand &mop,
MachineOpCode opCode)
{
bool needBitsFlag = true;
if (mop.isHiBits32())
toAsm << "%lm(";
else if (mop.isLoBits32())
toAsm << "%lo(";
else if (mop.isHiBits64())
toAsm << "%hh(";
else if (mop.isLoBits64())
toAsm << "%hm(";
else
needBitsFlag = false;
switch (mop.getType())
{
case MachineOperand::MO_VirtualRegister:
case MachineOperand::MO_CCRegister:
case MachineOperand::MO_MachineRegister:
{
int regNum = (int)mop.getReg();
if (regNum == Target.getRegInfo().getInvalidRegNum()) {
// better to print code with NULL registers than to die
toAsm << "<NULL VALUE>";
} else {
toAsm << "%" << Target.getRegInfo().getUnifiedRegName(regNum);
}
break;
}
case MachineOperand::MO_ConstantPoolIndex:
{
toAsm << ".CPI_" << currFunction->getName()
<< "_" << mop.getConstantPoolIndex();
break;
}
case MachineOperand::MO_PCRelativeDisp:
{
const Value *Val = mop.getVRegValue();
assert(Val && "\tNULL Value in SparcV9AsmPrinter");
if (const BasicBlock *BB = dyn_cast<BasicBlock>(Val))
toAsm << getID(BB);
else if (const Function *M = dyn_cast<Function>(Val))
toAsm << getID(M);
else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
toAsm << getID(GV);
else if (const Constant *CV = dyn_cast<Constant>(Val))
toAsm << getID(CV);
else
assert(0 && "Unrecognized value in SparcV9AsmPrinter");
break;
}
case MachineOperand::MO_SignExtendedImmed:
toAsm << mop.getImmedValue();
break;
case MachineOperand::MO_UnextendedImmed:
toAsm << (uint64_t) mop.getImmedValue();
break;
default:
toAsm << mop; // use dump field
break;
}
if (needBitsFlag)
toAsm << ")";
}
void SparcV9AsmPrinter::emitMachineInst(const MachineInstr *MI) {
unsigned Opcode = MI->getOpcode();
if (Target.getInstrInfo().isDummyPhiInstr(Opcode))
return; // IGNORE PHI NODES
toAsm << "\t" << Target.getInstrInfo().getName(Opcode) << "\t";
unsigned Mask = getOperandMask(Opcode);
bool NeedComma = false;
unsigned N = 1;
for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
if (NeedComma) toAsm << ", "; // Handle comma outputting
NeedComma = true;
N = printOperands(MI, OpNum);
} else
N = 1;
toAsm << "\n";
++EmittedInsts;
}
void SparcV9AsmPrinter::emitBasicBlock(const MachineBasicBlock &MBB) {
// Emit a label for the basic block
toAsm << getID(MBB.getBasicBlock()) << ":\n";
// Loop over all of the instructions in the basic block...
for (MachineBasicBlock::const_iterator MII = MBB.begin(), MIE = MBB.end();
MII != MIE; ++MII)
emitMachineInst(MII);
toAsm << "\n"; // Separate BB's with newlines
}
void SparcV9AsmPrinter::emitFunction(const Function &F) {
std::string methName = getID(&F);
toAsm << "!****** Outputing Function: " << methName << " ******\n";
// Emit constant pool for this function
const MachineConstantPool *MCP = MachineFunction::get(&F).getConstantPool();
const std::vector<Constant*> &CP = MCP->getConstants();
enterSection(AsmPrinter::ReadOnlyData);
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
std::string cpiName = ".CPI_" + F.getName() + "_" + utostr(i);
printConstant(CP[i], cpiName);
}
enterSection(AsmPrinter::Text);
toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
//toAsm << "\t.type\t" << methName << ",#function\n";
toAsm << "\t.type\t" << methName << ", 2\n";
toAsm << methName << ":\n";
// Output code for all of the basic blocks in the function...
MachineFunction &MF = MachineFunction::get(&F);
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); I != E;++I)
emitBasicBlock(*I);
// Output a .size directive so the debugger knows the extents of the function
toAsm << ".EndOf_" << methName << ":\n\t.size "
<< methName << ", .EndOf_"
<< methName << "-" << methName << "\n";
// Put some spaces between the functions
toAsm << "\n\n";
}
void SparcV9AsmPrinter::printGlobalVariable(const GlobalVariable* GV) {
if (GV->hasExternalLinkage())
toAsm << "\t.global\t" << getID(GV) << "\n";
if (GV->hasInitializer() && ! GV->getInitializer()->isNullValue()) {
printConstant(GV->getInitializer(), getID(GV));
} else {
toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
Target) << "\n";
toAsm << "\t.type\t" << getID(GV) << ",#object\n";
toAsm << "\t.reserve\t" << getID(GV) << ","
<< Target.findOptimalStorageSize(GV->getType()->getElementType())
<< "\n";
}
}
void SparcV9AsmPrinter::emitGlobals(const Module &M) {
// Output global variables...
for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI)
if (! GI->isExternal()) {
assert(GI->hasInitializer());
if (GI->isConstant())
enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
else if (GI->getInitializer()->isNullValue())
enterSection(AsmPrinter::ZeroInitRWData); // read-write zero data
else
enterSection(AsmPrinter::InitRWData); // read-write non-zero data
printGlobalVariable(GI);
}
toAsm << "\n";
}
FunctionPass *llvm::createAsmPrinterPass(std::ostream &Out,
const TargetMachine &TM) {
return new SparcV9AsmPrinter(Out, TM);
}
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