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* Remove CInstPrintVisitor class, incorporating it into the CWriter class

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* Reorder code in the file to make it more logically laid out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2586 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-05-09 20:53:56 +00:00
parent 497e19aee0
commit 4fbf26d2fc
2 changed files with 610 additions and 698 deletions
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654
lib/Target/CBackend/CBackend.cpp
View File

@ -45,20 +45,10 @@ static std::string getConstArrayStrValue(const Constant* CPV) {
const Type *ETy = cast<ArrayType>(CPV->getType())->getElementType();
bool isString = (ETy == Type::SByteTy || ETy == Type::UByteTy);
if (ETy == Type::SByteTy) {
for (unsigned i = 0; i < CPV->getNumOperands(); ++i)
if (ETy == Type::SByteTy &&
cast<ConstantSInt>(CPV->getOperand(i))->getValue() < 0) {
isString = false;
break;
}
}
if (isString) {
// Make sure the last character is a null char, as automatically added by C
if (CPV->getNumOperands() == 0 ||
!cast<Constant>(*(CPV->op_end()-1))->isNullValue())
isString = false;
}
// Make sure the last character is a null char, as automatically added by C
if (CPV->getNumOperands() == 0 ||
!cast<Constant>(*(CPV->op_end()-1))->isNullValue())
isString = false;
if (isString) {
Result = "\"";
@ -101,30 +91,21 @@ static std::string getConstArrayStrValue(const Constant* CPV) {
static std::string getConstStrValue(const Constant* CPV) {
switch (CPV->getType()->getPrimitiveID()) {
case Type::BoolTyID:
return CPV == ConstantBool::False ? "0" : "1";
case Type::BoolTyID: return CPV == ConstantBool::False ? "0" : "1";
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
return itostr(cast<ConstantSInt>(CPV)->getValue());
case Type::LongTyID:
return itostr(cast<ConstantSInt>(CPV)->getValue()) + "ll";
case Type::IntTyID: return itostr(cast<ConstantSInt>(CPV)->getValue());
case Type::LongTyID: return itostr(cast<ConstantSInt>(CPV)->getValue())+"ll";
case Type::UByteTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue());
case Type::UShortTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue());
case Type::UIntTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue())+"u";
case Type::ULongTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue())+"ull";
case Type::UShortTyID:return utostr(cast<ConstantUInt>(CPV)->getValue());
case Type::UIntTyID: return utostr(cast<ConstantUInt>(CPV)->getValue())+"u";
case Type::ULongTyID:return utostr(cast<ConstantUInt>(CPV)->getValue())+"ull";
case Type::FloatTyID:
case Type::DoubleTyID:
return ftostr(cast<ConstantFP>(CPV)->getValue());
case Type::DoubleTyID: return ftostr(cast<ConstantFP>(CPV)->getValue());
case Type::ArrayTyID:
return getConstArrayStrValue(CPV);
case Type::ArrayTyID: return getConstArrayStrValue(CPV);
case Type::StructTyID: {
std::string Result = "{";
@ -192,8 +173,7 @@ static string calcTypeNameVar(const Type *Ty,
Result += ", ";
Result += "...";
}
Result += ")";
break;
return Result + ")";
}
case Type::StructTyID: {
const StructType *STy = cast<const StructType>(Ty);
@ -205,33 +185,30 @@ static string calcTypeNameVar(const Type *Ty,
Result += " " +calcTypeNameVar(*I, TypeNames, "field" + utostr(indx++));
Result += ";\n";
}
Result += "}";
break;
return Result + "}";
}
case Type::PointerTyID: {
Result = calcTypeNameVar(cast<const PointerType>(Ty)->getElementType(),
TypeNames, "*" + NameSoFar);
break;
return calcTypeNameVar(cast<const PointerType>(Ty)->getElementType(),
TypeNames, "*" + NameSoFar);
}
case Type::ArrayTyID: {
const ArrayType *ATy = cast<const ArrayType>(Ty);
int NumElements = ATy->getNumElements();
Result = calcTypeNameVar(ATy->getElementType(), TypeNames,
NameSoFar + "[" + itostr(NumElements) + "]");
break;
return calcTypeNameVar(ATy->getElementType(), TypeNames,
NameSoFar + "[" + itostr(NumElements) + "]");
}
default:
assert(0 && "Unhandled case in getTypeProps!");
Result = "<error>";
abort();
}
return Result;
}
namespace {
class CWriter {
class CWriter : public InstVisitor<CWriter> {
ostream& Out;
SlotCalculator &Table;
const Module *TheModule;
@ -254,8 +231,8 @@ namespace {
void writeOperand(const Value *Operand);
string getValueName(const Value *V);
private :
private :
void printModule(Module *M);
void printSymbolTable(const SymbolTable &ST);
void printGlobal(const GlobalVariable *GV);
@ -263,307 +240,42 @@ namespace {
void printFunctionDecl(const Function *F); // Print just the forward decl
void printFunction(Function *);
};
/* END class CWriter */
}
namespace {
/* CLASS CInstPrintVisitor */
// Instruction visitation functions
friend class InstVisitor<CWriter>;
class CInstPrintVisitor: public InstVisitor<CInstPrintVisitor> {
CWriter& CW;
SlotCalculator& Table;
ostream &Out;
void visitReturnInst(ReturnInst *I);
void visitBranchInst(BranchInst *I);
void outputLValue(Instruction *);
void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
unsigned Indent);
void printIndexingExpr(MemAccessInst *MAI);
void visitPHINode(PHINode *I) {}
void visitNot(GenericUnaryInst *I);
void visitBinaryOperator(Instruction *I);
public:
CInstPrintVisitor (CWriter &cw, SlotCalculator& table, ostream& o)
: CW(cw), Table(table), Out(o) {}
void visitCastInst(CastInst *I);
void visitCallInst(CallInst *I);
void visitShiftInst(ShiftInst *I) { visitBinaryOperator(I); }
void visitReturnInst(ReturnInst *I);
void visitBranchInst(BranchInst *I);
void visitSwitchInst(SwitchInst *I);
void visitInvokeInst(InvokeInst *I) ;
void visitMallocInst(MallocInst *I);
void visitAllocaInst(AllocaInst *I);
void visitFreeInst(FreeInst *I);
void visitLoadInst(LoadInst *I);
void visitStoreInst(StoreInst *I);
void visitGetElementPtrInst(GetElementPtrInst *I);
void visitPHINode(PHINode *I) {}
void visitNot(GenericUnaryInst *I);
void visitBinaryOperator(Instruction *I);
void visitInstruction(Instruction *I) {
cerr << "C Writer does not know about " << I;
abort();
}
void outputLValue(Instruction *I) {
Out << " " << getValueName(I) << " = ";
}
void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
unsigned Indent);
void printIndexingExpr(MemAccessInst *MAI);
};
}
void CInstPrintVisitor::outputLValue(Instruction *I) {
Out << " " << CW.getValueName(I) << " = ";
}
// Implement all "other" instructions, except for PHINode
void CInstPrintVisitor::visitCastInst(CastInst *I) {
outputLValue(I);
Out << "(";
CW.printType(I->getType());
Out << ")";
CW.writeOperand(I->getOperand(0));
Out << ";\n";
}
void CInstPrintVisitor::visitCallInst(CallInst *I) {
if (I->getType() != Type::VoidTy)
outputLValue(I);
else
Out << " ";
const PointerType *PTy = cast<PointerType>(I->getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
const Type *RetTy = FTy->getReturnType();
Out << CW.getValueName(I->getOperand(0)) << "(";
if (I->getNumOperands() > 1) {
CW.writeOperand(I->getOperand(1));
for (unsigned op = 2, Eop = I->getNumOperands(); op != Eop; ++op) {
Out << ", ";
CW.writeOperand(I->getOperand(op));
}
}
Out << ");\n";
}
// Specific Instruction type classes... note that all of the casts are
// neccesary because we use the instruction classes as opaque types...
//
void CInstPrintVisitor::visitReturnInst(ReturnInst *I) {
// Don't output a void return if this is the last basic block in the function
if (I->getNumOperands() == 0 &&
*(I->getParent()->getParent()->end()-1) == I->getParent())
return;
Out << " return";
if (I->getNumOperands()) {
Out << " ";
CW.writeOperand(I->getOperand(0));
}
Out << ";\n";
}
// Return true if BB1 immediately preceeds BB2.
static bool BBFollowsBB(BasicBlock *BB1, BasicBlock *BB2) {
Function *F = BB1->getParent();
Function::iterator I = find(F->begin(), F->end(), BB1);
assert(I != F->end() && "BB not in function!");
return *(I+1) == BB2;
}
static bool isGotoCodeNeccessary(BasicBlock *From, BasicBlock *To) {
// If PHI nodes need copies, we need the copy code...
if (isa<PHINode>(To->front()) ||
!BBFollowsBB(From, To)) // Not directly successor, need goto
return true;
// Otherwise we don't need the code.
return false;
}
void CInstPrintVisitor::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
unsigned Indent) {
for (BasicBlock::iterator I = Succ->begin();
PHINode *PN = dyn_cast<PHINode>(*I); ++I) {
// now we have to do the printing
Out << string(Indent, ' ');
outputLValue(PN);
CW.writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
Out << "; /* for PHI node */\n";
}
if (!BBFollowsBB(CurBB, Succ)) {
Out << string(Indent, ' ') << " goto ";
CW.writeOperand(Succ);
Out << ";\n";
}
}
// Brach instruction printing - Avoid printing out a brach to a basic block that
// immediately succeeds the current one.
//
void CInstPrintVisitor::visitBranchInst(BranchInst *I) {
if (I->isConditional()) {
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(0))) {
Out << " if (";
CW.writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(0), 2);
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(1))) {
Out << " } else {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
} else {
// First goto not neccesary, assume second one is...
Out << " if (!";
CW.writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
Out << " }\n";
} else {
printBranchToBlock(I->getParent(), I->getSuccessor(0), 0);
}
Out << "\n";
}
void CInstPrintVisitor::visitSwitchInst(SwitchInst *I) {
assert(0 && "Switch not implemented!");
}
void CInstPrintVisitor::visitInvokeInst(InvokeInst *I) {
assert(0 && "Invoke not implemented!");
}
void CInstPrintVisitor::visitMallocInst(MallocInst *I) {
outputLValue(I);
Out << "(";
CW.printType(I->getType());
Out << ")malloc(sizeof(";
CW.printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
CW.writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CInstPrintVisitor::visitAllocaInst(AllocaInst *I) {
outputLValue(I);
Out << "(";
CW.printType(I->getType());
Out << ") alloca(sizeof(";
CW.printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
CW.writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CInstPrintVisitor::visitFreeInst(FreeInst *I) {
Out << " free(";
CW.writeOperand(I->getOperand(0));
Out << ");\n";
}
void CInstPrintVisitor::printIndexingExpr(MemAccessInst *MAI) {
MemAccessInst::op_iterator I = MAI->idx_begin(), E = MAI->idx_end();
if (I == E)
Out << "*"; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
CW.writeOperand(MAI->getPointerOperand());
if (I == E) return;
// Print out the -> operator if possible...
Constant *CI = dyn_cast<Constant>(*I);
if (CI && CI->isNullValue() && I+1 != E &&
(*(I+1))->getType() == Type::UByteTy) {
++I;
Out << "->field" << cast<ConstantUInt>(*I)->getValue();
++I;
}
for (; I != E; ++I)
if ((*I)->getType() == Type::UIntTy) {
Out << "[";
CW.writeOperand(*I);
Out << "]";
} else {
Out << ".field" << cast<ConstantUInt>(*I)->getValue();
}
}
void CInstPrintVisitor::visitLoadInst(LoadInst *I) {
outputLValue(I);
printIndexingExpr(I);
Out << ";\n";
}
void CInstPrintVisitor::visitStoreInst(StoreInst *I) {
Out << " ";
printIndexingExpr(I);
Out << " = ";
CW.writeOperand(I->getOperand(0));
Out << ";\n";
}
void CInstPrintVisitor::visitGetElementPtrInst(GetElementPtrInst *I) {
outputLValue(I);
Out << "&";
printIndexingExpr(I);
Out << ";\n";
}
void CInstPrintVisitor::visitNot(GenericUnaryInst *I) {
outputLValue(I);
Out << "~";
CW.writeOperand(I->getOperand(0));
Out << ";\n";
}
void CInstPrintVisitor::visitBinaryOperator(Instruction *I) {
// binary instructions, shift instructions, setCond instructions.
outputLValue(I);
if (isa<PointerType>(I->getType())) {
Out << "(";
CW.printType(I->getType());
Out << ")";
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
CW.writeOperand(I->getOperand(0));
switch (I->getOpcode()) {
case Instruction::Add: Out << " + "; break;
case Instruction::Sub: Out << " - "; break;
case Instruction::Mul: Out << "*"; break;
case Instruction::Div: Out << "/"; break;
case Instruction::Rem: Out << "%"; break;
case Instruction::And: Out << " & "; break;
case Instruction::Or: Out << " | "; break;
case Instruction::Xor: Out << " ^ "; break;
case Instruction::SetEQ: Out << " == "; break;
case Instruction::SetNE: Out << " != "; break;
case Instruction::SetLE: Out << " <= "; break;
case Instruction::SetGE: Out << " >= "; break;
case Instruction::SetLT: Out << " < "; break;
case Instruction::SetGT: Out << " > "; break;
case Instruction::Shl : Out << " << "; break;
case Instruction::Shr : Out << " >> "; break;
default: cerr << "Invalid operator type!" << I; abort();
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
CW.writeOperand(I->getOperand(1));
Out << ";\n";
}
/* END : CInstPrintVisitor implementation */
// We dont want identifier names with ., space, - in them.
// So we replace them with _
static string makeNameProper(string x) {
@ -594,6 +306,29 @@ string CWriter::getValueName(const Value *V) {
return "ltmp_" + itostr(Slot) + "_" + utostr(V->getType()->getUniqueID());
}
void CWriter::writeOperand(const Value *Operand) {
if (isa<GlobalVariable>(Operand))
Out << "(&"; // Global variables are references as their addresses by llvm
if (Operand->hasName()) {
Out << getValueName(Operand);
} else if (const Constant *CPV = dyn_cast<const Constant>(Operand)) {
if (isa<ConstantPointerNull>(CPV)) {
Out << "((";
printTypeVar(CPV->getType(), "");
Out << ")NULL)";
} else
Out << getConstStrValue(CPV);
} else {
int Slot = Table.getValSlot(Operand);
assert(Slot >= 0 && "Malformed LLVM!");
Out << "ltmp_" << Slot << "_" << Operand->getType()->getUniqueID();
}
if (isa<GlobalVariable>(Operand))
Out << ")";
}
void CWriter::printModule(Module *M) {
// printing stdlib inclusion
// Out << "#include <stdlib.h>\n";
@ -762,37 +497,258 @@ void CWriter::printFunction(Function *F) {
// Output all of the instructions in the basic block...
// print the basic blocks
CInstPrintVisitor CIPV(*this, Table, Out);
CIPV.visit(BB);
visit(BB);
}
Out << "}\n\n";
Table.purgeFunction();
}
void CWriter::writeOperand(const Value *Operand) {
if (isa<GlobalVariable>(Operand))
Out << "(&"; // Global variables are references as their addresses by llvm
// Specific Instruction type classes... note that all of the casts are
// neccesary because we use the instruction classes as opaque types...
//
void CWriter::visitReturnInst(ReturnInst *I) {
// Don't output a void return if this is the last basic block in the function
if (I->getNumOperands() == 0 &&
*(I->getParent()->getParent()->end()-1) == I->getParent())
return;
if (Operand->hasName()) {
Out << getValueName(Operand);
} else if (const Constant *CPV = dyn_cast<const Constant>(Operand)) {
if (isa<ConstantPointerNull>(CPV)) {
Out << "((";
printTypeVar(CPV->getType(), "");
Out << ")NULL)";
} else
Out << getConstStrValue(CPV);
} else {
int Slot = Table.getValSlot(Operand);
assert(Slot >= 0 && "Malformed LLVM!");
Out << "ltmp_" << Slot << "_" << Operand->getType()->getUniqueID();
Out << " return";
if (I->getNumOperands()) {
Out << " ";
writeOperand(I->getOperand(0));
}
if (isa<GlobalVariable>(Operand))
Out << ")";
Out << ";\n";
}
// Return true if BB1 immediately preceeds BB2.
static bool BBFollowsBB(BasicBlock *BB1, BasicBlock *BB2) {
Function *F = BB1->getParent();
Function::iterator I = find(F->begin(), F->end(), BB1);
assert(I != F->end() && "BB not in function!");
return *(I+1) == BB2;
}
static bool isGotoCodeNeccessary(BasicBlock *From, BasicBlock *To) {
// If PHI nodes need copies, we need the copy code...
if (isa<PHINode>(To->front()) ||
!BBFollowsBB(From, To)) // Not directly successor, need goto
return true;
// Otherwise we don't need the code.
return false;
}
void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
unsigned Indent) {
for (BasicBlock::iterator I = Succ->begin();
PHINode *PN = dyn_cast<PHINode>(*I); ++I) {
// now we have to do the printing
Out << string(Indent, ' ');
outputLValue(PN);
writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
Out << "; /* for PHI node */\n";
}
if (!BBFollowsBB(CurBB, Succ)) {
Out << string(Indent, ' ') << " goto ";
writeOperand(Succ);
Out << ";\n";
}
}
// Brach instruction printing - Avoid printing out a brach to a basic block that
// immediately succeeds the current one.
//
void CWriter::visitBranchInst(BranchInst *I) {
if (I->isConditional()) {
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(0))) {
Out << " if (";
writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(0), 2);
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(1))) {
Out << " } else {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
} else {
// First goto not neccesary, assume second one is...
Out << " if (!";
writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
Out << " }\n";
} else {
printBranchToBlock(I->getParent(), I->getSuccessor(0), 0);
}
Out << "\n";
}
void CWriter::visitNot(GenericUnaryInst *I) {
outputLValue(I);
Out << "~";
writeOperand(I->getOperand(0));
Out << ";\n";
}
void CWriter::visitBinaryOperator(Instruction *I) {
// binary instructions, shift instructions, setCond instructions.
outputLValue(I);
if (isa<PointerType>(I->getType())) {
Out << "(";
printType(I->getType());
Out << ")";
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
writeOperand(I->getOperand(0));
switch (I->getOpcode()) {
case Instruction::Add: Out << " + "; break;
case Instruction::Sub: Out << " - "; break;
case Instruction::Mul: Out << "*"; break;
case Instruction::Div: Out << "/"; break;
case Instruction::Rem: Out << "%"; break;
case Instruction::And: Out << " & "; break;
case Instruction::Or: Out << " | "; break;
case Instruction::Xor: Out << " ^ "; break;
case Instruction::SetEQ: Out << " == "; break;
case Instruction::SetNE: Out << " != "; break;
case Instruction::SetLE: Out << " <= "; break;
case Instruction::SetGE: Out << " >= "; break;
case Instruction::SetLT: Out << " < "; break;
case Instruction::SetGT: Out << " > "; break;
case Instruction::Shl : Out << " << "; break;
case Instruction::Shr : Out << " >> "; break;
default: cerr << "Invalid operator type!" << I; abort();
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
writeOperand(I->getOperand(1));
Out << ";\n";
}
void CWriter::visitCastInst(CastInst *I) {
outputLValue(I);
Out << "(";
printType(I->getType());
Out << ")";
writeOperand(I->getOperand(0));
Out << ";\n";
}
void CWriter::visitCallInst(CallInst *I) {
if (I->getType() != Type::VoidTy)
outputLValue(I);
else
Out << " ";
const PointerType *PTy = cast<PointerType>(I->getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
const Type *RetTy = FTy->getReturnType();
Out << getValueName(I->getOperand(0)) << "(";
if (I->getNumOperands() > 1) {
writeOperand(I->getOperand(1));
for (unsigned op = 2, Eop = I->getNumOperands(); op != Eop; ++op) {
Out << ", ";
writeOperand(I->getOperand(op));
}
}
Out << ");\n";
}
void CWriter::visitMallocInst(MallocInst *I) {
outputLValue(I);
Out << "(";
printType(I->getType());
Out << ")malloc(sizeof(";
printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CWriter::visitAllocaInst(AllocaInst *I) {
outputLValue(I);
Out << "(";
printType(I->getType());
Out << ") alloca(sizeof(";
printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CWriter::visitFreeInst(FreeInst *I) {
Out << " free(";
writeOperand(I->getOperand(0));
Out << ");\n";
}
void CWriter::printIndexingExpr(MemAccessInst *MAI) {
MemAccessInst::op_iterator I = MAI->idx_begin(), E = MAI->idx_end();
if (I == E)
Out << "*"; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
writeOperand(MAI->getPointerOperand());
if (I == E) return;
// Print out the -> operator if possible...
Constant *CI = dyn_cast<Constant>(*I);
if (CI && CI->isNullValue() && I+1 != E &&
(*(I+1))->getType() == Type::UByteTy) {
++I;
Out << "->field" << cast<ConstantUInt>(*I)->getValue();
++I;
}
for (; I != E; ++I)
if ((*I)->getType() == Type::UIntTy) {
Out << "[";
writeOperand(*I);
Out << "]";
} else {
Out << ".field" << cast<ConstantUInt>(*I)->getValue();
}
}
void CWriter::visitLoadInst(LoadInst *I) {
outputLValue(I);
printIndexingExpr(I);
Out << ";\n";
}
void CWriter::visitStoreInst(StoreInst *I) {
Out << " ";
printIndexingExpr(I);
Out << " = ";
writeOperand(I->getOperand(0));
Out << ";\n";
}
void CWriter::visitGetElementPtrInst(GetElementPtrInst *I) {
outputLValue(I);
Out << "&";
printIndexingExpr(I);
Out << ";\n";
}
//===----------------------------------------------------------------------===//
// External Interface declaration

654
lib/Target/CBackend/Writer.cpp
View File

@ -45,20 +45,10 @@ static std::string getConstArrayStrValue(const Constant* CPV) {
const Type *ETy = cast<ArrayType>(CPV->getType())->getElementType();
bool isString = (ETy == Type::SByteTy || ETy == Type::UByteTy);
if (ETy == Type::SByteTy) {
for (unsigned i = 0; i < CPV->getNumOperands(); ++i)
if (ETy == Type::SByteTy &&
cast<ConstantSInt>(CPV->getOperand(i))->getValue() < 0) {
isString = false;
break;
}
}
if (isString) {
// Make sure the last character is a null char, as automatically added by C
if (CPV->getNumOperands() == 0 ||
!cast<Constant>(*(CPV->op_end()-1))->isNullValue())
isString = false;
}
// Make sure the last character is a null char, as automatically added by C
if (CPV->getNumOperands() == 0 ||
!cast<Constant>(*(CPV->op_end()-1))->isNullValue())
isString = false;
if (isString) {
Result = "\"";
@ -101,30 +91,21 @@ static std::string getConstArrayStrValue(const Constant* CPV) {
static std::string getConstStrValue(const Constant* CPV) {
switch (CPV->getType()->getPrimitiveID()) {
case Type::BoolTyID:
return CPV == ConstantBool::False ? "0" : "1";
case Type::BoolTyID: return CPV == ConstantBool::False ? "0" : "1";
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
return itostr(cast<ConstantSInt>(CPV)->getValue());
case Type::LongTyID:
return itostr(cast<ConstantSInt>(CPV)->getValue()) + "ll";
case Type::IntTyID: return itostr(cast<ConstantSInt>(CPV)->getValue());
case Type::LongTyID: return itostr(cast<ConstantSInt>(CPV)->getValue())+"ll";
case Type::UByteTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue());
case Type::UShortTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue());
case Type::UIntTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue())+"u";
case Type::ULongTyID:
return utostr(cast<ConstantUInt>(CPV)->getValue())+"ull";
case Type::UShortTyID:return utostr(cast<ConstantUInt>(CPV)->getValue());
case Type::UIntTyID: return utostr(cast<ConstantUInt>(CPV)->getValue())+"u";
case Type::ULongTyID:return utostr(cast<ConstantUInt>(CPV)->getValue())+"ull";
case Type::FloatTyID:
case Type::DoubleTyID:
return ftostr(cast<ConstantFP>(CPV)->getValue());
case Type::DoubleTyID: return ftostr(cast<ConstantFP>(CPV)->getValue());
case Type::ArrayTyID:
return getConstArrayStrValue(CPV);
case Type::ArrayTyID: return getConstArrayStrValue(CPV);
case Type::StructTyID: {
std::string Result = "{";
@ -192,8 +173,7 @@ static string calcTypeNameVar(const Type *Ty,
Result += ", ";
Result += "...";
}
Result += ")";
break;
return Result + ")";
}
case Type::StructTyID: {
const StructType *STy = cast<const StructType>(Ty);
@ -205,33 +185,30 @@ static string calcTypeNameVar(const Type *Ty,
Result += " " +calcTypeNameVar(*I, TypeNames, "field" + utostr(indx++));
Result += ";\n";
}
Result += "}";
break;
return Result + "}";
}
case Type::PointerTyID: {
Result = calcTypeNameVar(cast<const PointerType>(Ty)->getElementType(),
TypeNames, "*" + NameSoFar);
break;
return calcTypeNameVar(cast<const PointerType>(Ty)->getElementType(),
TypeNames, "*" + NameSoFar);
}
case Type::ArrayTyID: {
const ArrayType *ATy = cast<const ArrayType>(Ty);
int NumElements = ATy->getNumElements();
Result = calcTypeNameVar(ATy->getElementType(), TypeNames,
NameSoFar + "[" + itostr(NumElements) + "]");
break;
return calcTypeNameVar(ATy->getElementType(), TypeNames,
NameSoFar + "[" + itostr(NumElements) + "]");
}
default:
assert(0 && "Unhandled case in getTypeProps!");
Result = "<error>";
abort();
}
return Result;
}
namespace {
class CWriter {
class CWriter : public InstVisitor<CWriter> {
ostream& Out;
SlotCalculator &Table;
const Module *TheModule;
@ -254,8 +231,8 @@ namespace {
void writeOperand(const Value *Operand);
string getValueName(const Value *V);
private :
private :
void printModule(Module *M);
void printSymbolTable(const SymbolTable &ST);
void printGlobal(const GlobalVariable *GV);
@ -263,307 +240,42 @@ namespace {
void printFunctionDecl(const Function *F); // Print just the forward decl
void printFunction(Function *);
};
/* END class CWriter */
}
namespace {
/* CLASS CInstPrintVisitor */
// Instruction visitation functions
friend class InstVisitor<CWriter>;
class CInstPrintVisitor: public InstVisitor<CInstPrintVisitor> {
CWriter& CW;
SlotCalculator& Table;
ostream &Out;
void visitReturnInst(ReturnInst *I);
void visitBranchInst(BranchInst *I);
void outputLValue(Instruction *);
void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
unsigned Indent);
void printIndexingExpr(MemAccessInst *MAI);
void visitPHINode(PHINode *I) {}
void visitNot(GenericUnaryInst *I);
void visitBinaryOperator(Instruction *I);
public:
CInstPrintVisitor (CWriter &cw, SlotCalculator& table, ostream& o)
: CW(cw), Table(table), Out(o) {}
void visitCastInst(CastInst *I);
void visitCallInst(CallInst *I);
void visitShiftInst(ShiftInst *I) { visitBinaryOperator(I); }
void visitReturnInst(ReturnInst *I);
void visitBranchInst(BranchInst *I);
void visitSwitchInst(SwitchInst *I);
void visitInvokeInst(InvokeInst *I) ;
void visitMallocInst(MallocInst *I);
void visitAllocaInst(AllocaInst *I);
void visitFreeInst(FreeInst *I);
void visitLoadInst(LoadInst *I);
void visitStoreInst(StoreInst *I);
void visitGetElementPtrInst(GetElementPtrInst *I);
void visitPHINode(PHINode *I) {}
void visitNot(GenericUnaryInst *I);
void visitBinaryOperator(Instruction *I);
void visitInstruction(Instruction *I) {
cerr << "C Writer does not know about " << I;
abort();
}
void outputLValue(Instruction *I) {
Out << " " << getValueName(I) << " = ";
}
void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
unsigned Indent);
void printIndexingExpr(MemAccessInst *MAI);
};
}
void CInstPrintVisitor::outputLValue(Instruction *I) {
Out << " " << CW.getValueName(I) << " = ";
}
// Implement all "other" instructions, except for PHINode
void CInstPrintVisitor::visitCastInst(CastInst *I) {
outputLValue(I);
Out << "(";
CW.printType(I->getType());
Out << ")";
CW.writeOperand(I->getOperand(0));
Out << ";\n";
}
void CInstPrintVisitor::visitCallInst(CallInst *I) {
if (I->getType() != Type::VoidTy)
outputLValue(I);
else
Out << " ";
const PointerType *PTy = cast<PointerType>(I->getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
const Type *RetTy = FTy->getReturnType();
Out << CW.getValueName(I->getOperand(0)) << "(";
if (I->getNumOperands() > 1) {
CW.writeOperand(I->getOperand(1));
for (unsigned op = 2, Eop = I->getNumOperands(); op != Eop; ++op) {
Out << ", ";
CW.writeOperand(I->getOperand(op));
}
}
Out << ");\n";
}
// Specific Instruction type classes... note that all of the casts are
// neccesary because we use the instruction classes as opaque types...
//
void CInstPrintVisitor::visitReturnInst(ReturnInst *I) {
// Don't output a void return if this is the last basic block in the function
if (I->getNumOperands() == 0 &&
*(I->getParent()->getParent()->end()-1) == I->getParent())
return;
Out << " return";
if (I->getNumOperands()) {
Out << " ";
CW.writeOperand(I->getOperand(0));
}
Out << ";\n";
}
// Return true if BB1 immediately preceeds BB2.
static bool BBFollowsBB(BasicBlock *BB1, BasicBlock *BB2) {
Function *F = BB1->getParent();
Function::iterator I = find(F->begin(), F->end(), BB1);
assert(I != F->end() && "BB not in function!");
return *(I+1) == BB2;
}
static bool isGotoCodeNeccessary(BasicBlock *From, BasicBlock *To) {
// If PHI nodes need copies, we need the copy code...
if (isa<PHINode>(To->front()) ||
!BBFollowsBB(From, To)) // Not directly successor, need goto
return true;
// Otherwise we don't need the code.
return false;
}
void CInstPrintVisitor::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
unsigned Indent) {
for (BasicBlock::iterator I = Succ->begin();
PHINode *PN = dyn_cast<PHINode>(*I); ++I) {
// now we have to do the printing
Out << string(Indent, ' ');
outputLValue(PN);
CW.writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
Out << "; /* for PHI node */\n";
}
if (!BBFollowsBB(CurBB, Succ)) {
Out << string(Indent, ' ') << " goto ";
CW.writeOperand(Succ);
Out << ";\n";
}
}
// Brach instruction printing - Avoid printing out a brach to a basic block that
// immediately succeeds the current one.
//
void CInstPrintVisitor::visitBranchInst(BranchInst *I) {
if (I->isConditional()) {
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(0))) {
Out << " if (";
CW.writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(0), 2);
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(1))) {
Out << " } else {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
} else {
// First goto not neccesary, assume second one is...
Out << " if (!";
CW.writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
Out << " }\n";
} else {
printBranchToBlock(I->getParent(), I->getSuccessor(0), 0);
}
Out << "\n";
}
void CInstPrintVisitor::visitSwitchInst(SwitchInst *I) {
assert(0 && "Switch not implemented!");
}
void CInstPrintVisitor::visitInvokeInst(InvokeInst *I) {
assert(0 && "Invoke not implemented!");
}
void CInstPrintVisitor::visitMallocInst(MallocInst *I) {
outputLValue(I);
Out << "(";
CW.printType(I->getType());
Out << ")malloc(sizeof(";
CW.printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
CW.writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CInstPrintVisitor::visitAllocaInst(AllocaInst *I) {
outputLValue(I);
Out << "(";
CW.printType(I->getType());
Out << ") alloca(sizeof(";
CW.printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
CW.writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CInstPrintVisitor::visitFreeInst(FreeInst *I) {
Out << " free(";
CW.writeOperand(I->getOperand(0));
Out << ");\n";
}
void CInstPrintVisitor::printIndexingExpr(MemAccessInst *MAI) {
MemAccessInst::op_iterator I = MAI->idx_begin(), E = MAI->idx_end();
if (I == E)
Out << "*"; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
CW.writeOperand(MAI->getPointerOperand());
if (I == E) return;
// Print out the -> operator if possible...
Constant *CI = dyn_cast<Constant>(*I);
if (CI && CI->isNullValue() && I+1 != E &&
(*(I+1))->getType() == Type::UByteTy) {
++I;
Out << "->field" << cast<ConstantUInt>(*I)->getValue();
++I;
}
for (; I != E; ++I)
if ((*I)->getType() == Type::UIntTy) {
Out << "[";
CW.writeOperand(*I);
Out << "]";
} else {
Out << ".field" << cast<ConstantUInt>(*I)->getValue();
}
}
void CInstPrintVisitor::visitLoadInst(LoadInst *I) {
outputLValue(I);
printIndexingExpr(I);
Out << ";\n";
}
void CInstPrintVisitor::visitStoreInst(StoreInst *I) {
Out << " ";
printIndexingExpr(I);
Out << " = ";
CW.writeOperand(I->getOperand(0));
Out << ";\n";
}
void CInstPrintVisitor::visitGetElementPtrInst(GetElementPtrInst *I) {
outputLValue(I);
Out << "&";
printIndexingExpr(I);
Out << ";\n";
}
void CInstPrintVisitor::visitNot(GenericUnaryInst *I) {
outputLValue(I);
Out << "~";
CW.writeOperand(I->getOperand(0));
Out << ";\n";
}
void CInstPrintVisitor::visitBinaryOperator(Instruction *I) {
// binary instructions, shift instructions, setCond instructions.
outputLValue(I);
if (isa<PointerType>(I->getType())) {
Out << "(";
CW.printType(I->getType());
Out << ")";
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
CW.writeOperand(I->getOperand(0));
switch (I->getOpcode()) {
case Instruction::Add: Out << " + "; break;
case Instruction::Sub: Out << " - "; break;
case Instruction::Mul: Out << "*"; break;
case Instruction::Div: Out << "/"; break;
case Instruction::Rem: Out << "%"; break;
case Instruction::And: Out << " & "; break;
case Instruction::Or: Out << " | "; break;
case Instruction::Xor: Out << " ^ "; break;
case Instruction::SetEQ: Out << " == "; break;
case Instruction::SetNE: Out << " != "; break;
case Instruction::SetLE: Out << " <= "; break;
case Instruction::SetGE: Out << " >= "; break;
case Instruction::SetLT: Out << " < "; break;
case Instruction::SetGT: Out << " > "; break;
case Instruction::Shl : Out << " << "; break;
case Instruction::Shr : Out << " >> "; break;
default: cerr << "Invalid operator type!" << I; abort();
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
CW.writeOperand(I->getOperand(1));
Out << ";\n";
}
/* END : CInstPrintVisitor implementation */
// We dont want identifier names with ., space, - in them.
// So we replace them with _
static string makeNameProper(string x) {
@ -594,6 +306,29 @@ string CWriter::getValueName(const Value *V) {
return "ltmp_" + itostr(Slot) + "_" + utostr(V->getType()->getUniqueID());
}
void CWriter::writeOperand(const Value *Operand) {
if (isa<GlobalVariable>(Operand))
Out << "(&"; // Global variables are references as their addresses by llvm
if (Operand->hasName()) {
Out << getValueName(Operand);
} else if (const Constant *CPV = dyn_cast<const Constant>(Operand)) {
if (isa<ConstantPointerNull>(CPV)) {
Out << "((";
printTypeVar(CPV->getType(), "");
Out << ")NULL)";
} else
Out << getConstStrValue(CPV);
} else {
int Slot = Table.getValSlot(Operand);
assert(Slot >= 0 && "Malformed LLVM!");
Out << "ltmp_" << Slot << "_" << Operand->getType()->getUniqueID();
}
if (isa<GlobalVariable>(Operand))
Out << ")";
}
void CWriter::printModule(Module *M) {
// printing stdlib inclusion
// Out << "#include <stdlib.h>\n";
@ -762,37 +497,258 @@ void CWriter::printFunction(Function *F) {
// Output all of the instructions in the basic block...
// print the basic blocks
CInstPrintVisitor CIPV(*this, Table, Out);
CIPV.visit(BB);
visit(BB);
}
Out << "}\n\n";
Table.purgeFunction();
}
void CWriter::writeOperand(const Value *Operand) {
if (isa<GlobalVariable>(Operand))
Out << "(&"; // Global variables are references as their addresses by llvm
// Specific Instruction type classes... note that all of the casts are
// neccesary because we use the instruction classes as opaque types...
//
void CWriter::visitReturnInst(ReturnInst *I) {
// Don't output a void return if this is the last basic block in the function
if (I->getNumOperands() == 0 &&
*(I->getParent()->getParent()->end()-1) == I->getParent())
return;
if (Operand->hasName()) {
Out << getValueName(Operand);
} else if (const Constant *CPV = dyn_cast<const Constant>(Operand)) {
if (isa<ConstantPointerNull>(CPV)) {
Out << "((";
printTypeVar(CPV->getType(), "");
Out << ")NULL)";
} else
Out << getConstStrValue(CPV);
} else {
int Slot = Table.getValSlot(Operand);
assert(Slot >= 0 && "Malformed LLVM!");
Out << "ltmp_" << Slot << "_" << Operand->getType()->getUniqueID();
Out << " return";
if (I->getNumOperands()) {
Out << " ";
writeOperand(I->getOperand(0));
}
if (isa<GlobalVariable>(Operand))
Out << ")";
Out << ";\n";
}
// Return true if BB1 immediately preceeds BB2.
static bool BBFollowsBB(BasicBlock *BB1, BasicBlock *BB2) {
Function *F = BB1->getParent();
Function::iterator I = find(F->begin(), F->end(), BB1);
assert(I != F->end() && "BB not in function!");
return *(I+1) == BB2;
}
static bool isGotoCodeNeccessary(BasicBlock *From, BasicBlock *To) {
// If PHI nodes need copies, we need the copy code...
if (isa<PHINode>(To->front()) ||
!BBFollowsBB(From, To)) // Not directly successor, need goto
return true;
// Otherwise we don't need the code.
return false;
}
void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
unsigned Indent) {
for (BasicBlock::iterator I = Succ->begin();
PHINode *PN = dyn_cast<PHINode>(*I); ++I) {
// now we have to do the printing
Out << string(Indent, ' ');
outputLValue(PN);
writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
Out << "; /* for PHI node */\n";
}
if (!BBFollowsBB(CurBB, Succ)) {
Out << string(Indent, ' ') << " goto ";
writeOperand(Succ);
Out << ";\n";
}
}
// Brach instruction printing - Avoid printing out a brach to a basic block that
// immediately succeeds the current one.
//
void CWriter::visitBranchInst(BranchInst *I) {
if (I->isConditional()) {
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(0))) {
Out << " if (";
writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(0), 2);
if (isGotoCodeNeccessary(I->getParent(), I->getSuccessor(1))) {
Out << " } else {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
} else {
// First goto not neccesary, assume second one is...
Out << " if (!";
writeOperand(I->getCondition());
Out << ") {\n";
printBranchToBlock(I->getParent(), I->getSuccessor(1), 2);
}
Out << " }\n";
} else {
printBranchToBlock(I->getParent(), I->getSuccessor(0), 0);
}
Out << "\n";
}
void CWriter::visitNot(GenericUnaryInst *I) {
outputLValue(I);
Out << "~";
writeOperand(I->getOperand(0));
Out << ";\n";
}
void CWriter::visitBinaryOperator(Instruction *I) {
// binary instructions, shift instructions, setCond instructions.
outputLValue(I);
if (isa<PointerType>(I->getType())) {
Out << "(";
printType(I->getType());
Out << ")";
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
writeOperand(I->getOperand(0));
switch (I->getOpcode()) {
case Instruction::Add: Out << " + "; break;
case Instruction::Sub: Out << " - "; break;
case Instruction::Mul: Out << "*"; break;
case Instruction::Div: Out << "/"; break;
case Instruction::Rem: Out << "%"; break;
case Instruction::And: Out << " & "; break;
case Instruction::Or: Out << " | "; break;
case Instruction::Xor: Out << " ^ "; break;
case Instruction::SetEQ: Out << " == "; break;
case Instruction::SetNE: Out << " != "; break;
case Instruction::SetLE: Out << " <= "; break;
case Instruction::SetGE: Out << " >= "; break;
case Instruction::SetLT: Out << " < "; break;
case Instruction::SetGT: Out << " > "; break;
case Instruction::Shl : Out << " << "; break;
case Instruction::Shr : Out << " >> "; break;
default: cerr << "Invalid operator type!" << I; abort();
}
if (isa<PointerType>(I->getType())) Out << "(long long)";
writeOperand(I->getOperand(1));
Out << ";\n";
}
void CWriter::visitCastInst(CastInst *I) {
outputLValue(I);
Out << "(";
printType(I->getType());
Out << ")";
writeOperand(I->getOperand(0));
Out << ";\n";
}
void CWriter::visitCallInst(CallInst *I) {
if (I->getType() != Type::VoidTy)
outputLValue(I);
else
Out << " ";
const PointerType *PTy = cast<PointerType>(I->getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
const Type *RetTy = FTy->getReturnType();
Out << getValueName(I->getOperand(0)) << "(";
if (I->getNumOperands() > 1) {
writeOperand(I->getOperand(1));
for (unsigned op = 2, Eop = I->getNumOperands(); op != Eop; ++op) {
Out << ", ";
writeOperand(I->getOperand(op));
}
}
Out << ");\n";
}
void CWriter::visitMallocInst(MallocInst *I) {
outputLValue(I);
Out << "(";
printType(I->getType());
Out << ")malloc(sizeof(";
printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CWriter::visitAllocaInst(AllocaInst *I) {
outputLValue(I);
Out << "(";
printType(I->getType());
Out << ") alloca(sizeof(";
printType(I->getType()->getElementType());
Out << ")";
if (I->isArrayAllocation()) {
Out << " * " ;
writeOperand(I->getOperand(0));
}
Out << ");\n";
}
void CWriter::visitFreeInst(FreeInst *I) {
Out << " free(";
writeOperand(I->getOperand(0));
Out << ");\n";
}
void CWriter::printIndexingExpr(MemAccessInst *MAI) {
MemAccessInst::op_iterator I = MAI->idx_begin(), E = MAI->idx_end();
if (I == E)
Out << "*"; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
writeOperand(MAI->getPointerOperand());
if (I == E) return;
// Print out the -> operator if possible...
Constant *CI = dyn_cast<Constant>(*I);
if (CI && CI->isNullValue() && I+1 != E &&
(*(I+1))->getType() == Type::UByteTy) {
++I;
Out << "->field" << cast<ConstantUInt>(*I)->getValue();
++I;
}
for (; I != E; ++I)
if ((*I)->getType() == Type::UIntTy) {
Out << "[";
writeOperand(*I);
Out << "]";
} else {
Out << ".field" << cast<ConstantUInt>(*I)->getValue();
}
}
void CWriter::visitLoadInst(LoadInst *I) {
outputLValue(I);
printIndexingExpr(I);
Out << ";\n";
}
void CWriter::visitStoreInst(StoreInst *I) {
Out << " ";
printIndexingExpr(I);
Out << " = ";
writeOperand(I->getOperand(0));
Out << ";\n";
}
void CWriter::visitGetElementPtrInst(GetElementPtrInst *I) {
outputLValue(I);
Out << "&";
printIndexingExpr(I);
Out << ";\n";
}
//===----------------------------------------------------------------------===//
// External Interface declaration