RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-02-02 18:31:54 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
llvm-mirror/lib/Target/Sparc/EmitAssembly.cpp
Alkis Evlogimenos 29127b8825 Change interface of MachineOperand as follows: 
a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse()
    b) add isUse(), isDef()
    c) rename opHiBits32() to isHiBits32(),
              opLoBits32() to isLoBits32(),
              opHiBits64() to isHiBits64(),
              opLoBits64() to isLoBits64().

This results to much more readable code, for example compare
"op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used
very often in the code.

llvm-svn: 10461
2003-12-14 13:24:17 +00:00

916 lines
30 KiB
C++
Raw Blame History

//===-- EmitAssembly.cpp - Emit Sparc 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/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionInfo.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/SlotCalculator.h"
#include "llvm/Pass.h"
#include "llvm/Assembly/Writer.h"
#include "Support/StringExtras.h"
#include "Support/Statistic.h"
#include "SparcInternals.h"
#include <string>
using namespace llvm;
namespace llvm {
namespace {
Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
class GlobalIdTable: public Annotation {
static AnnotationID AnnotId;
friend class AsmPrinter; // give access to AnnotId
typedef hash_map<const Value*, int> ValIdMap;
typedef ValIdMap::const_iterator ValIdMapConstIterator;
typedef ValIdMap:: iterator ValIdMapIterator;
public:
SlotCalculator Table; // map anonymous values to unique integer IDs
ValIdMap valToIdMap; // used for values not handled by SlotCalculator
GlobalIdTable(Module* M) : Annotation(AnnotId), Table(M, true) {}
};
AnnotationID GlobalIdTable::AnnotId =
AnnotationManager::getID("ASM PRINTER GLOBAL TABLE ANNOT");
//===--------------------------------------------------------------------===//
// Utility functions
/// Can we treat the specified array as a string? Only if it is an array of
/// ubytes or non-negative sbytes.
///
bool isStringCompatible(const ConstantArray *CVA) {
const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
if (ETy == Type::UByteTy) return true;
if (ETy != Type::SByteTy) return false;
for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
return false;
return true;
}
/// getAsCString - Return the specified array as a C compatible string, only
/// if the predicate isStringCompatible is true.
///
std::string getAsCString(const ConstantArray *CVA) {
assert(isStringCompatible(CVA) && "Array is not string compatible!");
std::string Result;
const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
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) {
unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
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
} // End namespace llvm
//===---------------------------------------------------------------------===//
// Code abstracted away from the AsmPrinter
//===---------------------------------------------------------------------===//
namespace llvm {
namespace {
class AsmPrinter {
GlobalIdTable* idTable;
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) {}
// (start|end)(Module|Function) - Callback methods invoked by subclasses
void startModule(Module &M) {
// Create the global id table if it does not already exist
idTable = (GlobalIdTable*)M.getAnnotation(GlobalIdTable::AnnotId);
if (idTable == NULL) {
idTable = new GlobalIdTable(&M);
M.addAnnotation(idTable);
}
}
void PrintZeroBytesToPad(int numBytes) {
for (/* no init */; numBytes >= 8; numBytes -= 8)
printSingleConstantValue(Constant::getNullValue(Type::ULongTy));
if (numBytes >= 4) {
printSingleConstantValue(Constant::getNullValue(Type::UIntTy));
numBytes -= 4;
}
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.
const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
if (CVA && isStringCompatible(CVA)) {
// 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);
}
void startFunction(Function &F) {
// Make sure the slot table has information about this function...
idTable->Table.incorporateFunction(&F);
}
void endFunction(Function &) {
idTable->Table.purgeFunction(); // Forget all about F
}
// Check if a value is external or accessible from external code.
bool isExternal(const Value* V) {
const GlobalValue *GV = dyn_cast<GlobalValue>(V);
return GV && GV->hasExternalLinkage();
}
// 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";
}
static std::string getValidSymbolName(const std::string &S) {
std::string Result;
// Symbol names in Sparc assembly language have these rules:
// (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
// (b) A name beginning in "." is treated as a local name.
//
if (isdigit(S[0]))
Result = "ll";
for (unsigned i = 0; i < S.size(); ++i) {
char C = S[i];
if (C == '_' || C == '.' || C == '$' || isalpha(C) || isdigit(C))
Result += C;
else {
Result += '_';
Result += char('0' + ((unsigned char)C >> 4));
Result += char('0' + (C & 0xF));
}
}
return Result;
}
// getID - Return a valid identifier for the specified value. Base it on
// the name of the identifier if possible (qualified by the type), and
// use a numbered value based on prefix otherwise.
// FPrefix is always prepended to the output identifier.
//
std::string getID(const Value *V, const char *Prefix,
const char *FPrefix = 0)
{
std::string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
Result += V->hasName() ? V->getName() : std::string(Prefix);
// Qualify all internal names with a unique id.
if (!isExternal(V)) {
int valId = idTable->Table.getSlot(V);
if (valId == -1) {
GlobalIdTable::ValIdMapConstIterator I = idTable->valToIdMap.find(V);
if (I == idTable->valToIdMap.end())
valId = idTable->valToIdMap[V] = idTable->valToIdMap.size();
else
valId = I->second;
}
Result = Result + "_" + itostr(valId);
// Replace or prefix problem characters in the name
Result = getValidSymbolName(Result);
}
return Result;
}
// getID Wrappers - Ensure consistent usage...
std::string getID(const Function *F) {
return getID(F, "LLVMFunction_");
}
std::string getID(const BasicBlock *BB) {
return getID(BB, "LL", (".L_"+getID(BB->getParent())+"_").c_str());
}
std::string getID(const GlobalVariable *GV) {
return getID(GV, "LLVMGlobal_");
}
std::string getID(const Constant *CV) {
return getID(CV, "LLVMConst_", ".C_");
}
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
} // End namespace llvm
/// 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 {
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)
{
const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
if (CVA && isStringCompatible(CVA)) {
// print the string alone and return
toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
} else if (CVA) {
// 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
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;
}
//===----------------------------------------------------------------------===//
// SparcAsmPrinter Code
//===----------------------------------------------------------------------===//
namespace llvm {
namespace {
struct SparcAsmPrinter : public FunctionPass, public AsmPrinter {
inline SparcAsmPrinter(std::ostream &os, const TargetMachine &t)
: AsmPrinter(os, t) {}
const Function *currFunction;
const char *getPassName() const {
return "Output Sparc Assembly for Functions";
}
virtual bool doInitialization(Module &M) {
startModule(M);
return false;
}
virtual bool runOnFunction(Function &F) {
currFunction = &F;
startFunction(F);
emitFunction(F);
endFunction(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
SparcAsmPrinter::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
SparcAsmPrinter::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
SparcAsmPrinter::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
SparcAsmPrinter::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.getAllocatedRegNum();
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 SparcAsmPrinter");
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 SparcAsmPrinter");
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 SparcAsmPrinter::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 SparcAsmPrinter::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 SparcAsmPrinter::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 SparcAsmPrinter::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 SparcAsmPrinter::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 *createAsmPrinterPass(std::ostream &Out, const TargetMachine &TM) {
return new SparcAsmPrinter(Out, TM);
}
} // End llvm namespace
Reference in New Issue View Git Blame Copy Permalink