#include "llvm/iPHINode.h"
#include "llvm/iOther.h"
#include "llvm/iOperators.h"
+#include "llvm/Pass.h"
#include "llvm/SymbolTable.h"
#include "llvm/SlotCalculator.h"
+#include "llvm/Analysis/FindUsedTypes.h"
#include "llvm/Support/InstVisitor.h"
#include "llvm/Support/InstIterator.h"
#include "Support/StringExtras.h"
using std::map;
using std::ostream;
-
-
-// Pass the Type* variable and and the variable name and this prints out the
-// variable declaration.
-//
-static string calcTypeNameVar(const Type *Ty,
- map<const Type *, string> &TypeNames,
- const string &NameSoFar, bool ignoreName = false){
- if (Ty->isPrimitiveType())
- switch (Ty->getPrimitiveID()) {
- case Type::VoidTyID: return "void " + NameSoFar;
- case Type::BoolTyID: return "bool " + NameSoFar;
- case Type::UByteTyID: return "unsigned char " + NameSoFar;
- case Type::SByteTyID: return "signed char " + NameSoFar;
- case Type::UShortTyID: return "unsigned short " + NameSoFar;
- case Type::ShortTyID: return "short " + NameSoFar;
- case Type::UIntTyID: return "unsigned " + NameSoFar;
- case Type::IntTyID: return "int " + NameSoFar;
- case Type::ULongTyID: return "unsigned long long " + NameSoFar;
- case Type::LongTyID: return "signed long long " + NameSoFar;
- case Type::FloatTyID: return "float " + NameSoFar;
- case Type::DoubleTyID: return "double " + NameSoFar;
- default :
- std::cerr << "Unknown primitive type: " << Ty << "\n";
- abort();
- }
-
- // Check to see if the type is named.
- if (!ignoreName) {
- map<const Type *, string>::iterator I = TypeNames.find(Ty);
- if (I != TypeNames.end())
- return I->second + " " + NameSoFar;
- }
-
- string Result;
- switch (Ty->getPrimitiveID()) {
- case Type::FunctionTyID: {
- const FunctionType *MTy = cast<FunctionType>(Ty);
- Result += calcTypeNameVar(MTy->getReturnType(), TypeNames, "");
- Result += " " + NameSoFar + " (";
- for (FunctionType::ParamTypes::const_iterator
- I = MTy->getParamTypes().begin(),
- E = MTy->getParamTypes().end(); I != E; ++I) {
- if (I != MTy->getParamTypes().begin())
- Result += ", ";
- Result += calcTypeNameVar(*I, TypeNames, "");
- }
- if (MTy->isVarArg()) {
- if (!MTy->getParamTypes().empty())
- Result += ", ";
- Result += "...";
- }
- return Result + ")";
- }
- case Type::StructTyID: {
- const StructType *STy = cast<const StructType>(Ty);
- Result = NameSoFar + " {\n";
- unsigned indx = 0;
- for (StructType::ElementTypes::const_iterator
- I = STy->getElementTypes().begin(),
- E = STy->getElementTypes().end(); I != E; ++I) {
- Result += " " +calcTypeNameVar(*I, TypeNames, "field" + utostr(indx++));
- Result += ";\n";
- }
- return Result + "}";
- }
-
- case Type::PointerTyID:
- return calcTypeNameVar(cast<const PointerType>(Ty)->getElementType(),
- TypeNames, "*" + NameSoFar);
-
- case Type::ArrayTyID: {
- const ArrayType *ATy = cast<const ArrayType>(Ty);
- int NumElements = ATy->getNumElements();
- return calcTypeNameVar(ATy->getElementType(), TypeNames,
- NameSoFar + "[" + itostr(NumElements) + "]");
- }
- default:
- assert(0 && "Unhandled case in getTypeProps!");
- abort();
- }
-
- return Result;
-}
-
namespace {
- class CWriter : public InstVisitor<CWriter> {
- ostream& Out;
- SlotCalculator &Table;
+ class CWriter : public Pass, public InstVisitor<CWriter> {
+ ostream &Out;
+ SlotCalculator *Table;
const Module *TheModule;
map<const Type *, string> TypeNames;
std::set<const Value*> MangledGlobals;
public:
- inline CWriter(ostream &o, SlotCalculator &Tab, const Module *M)
- : Out(o), Table(Tab), TheModule(M) {
+ CWriter(ostream &o) : Out(o) {}
+
+ void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ AU.addRequired<FindUsedTypes>();
}
-
- inline void write(Module *M) { printModule(M); }
- ostream& printType(const Type *Ty, const string &VariableName = "") {
- return Out << calcTypeNameVar(Ty, TypeNames, VariableName);
+ virtual bool run(Module &M) {
+ // Initialize
+ Table = new SlotCalculator(&M, false);
+ TheModule = &M;
+
+ // Ensure that all structure types have names...
+ bool Changed = nameAllUsedStructureTypes(M);
+
+ // Run...
+ printModule(&M);
+
+ // Free memory...
+ delete Table;
+ TypeNames.clear();
+ MangledGlobals.clear();
+ return false;
}
+ ostream &printType(const Type *Ty, const string &VariableName = "",
+ bool IgnoreName = false, bool namedContext = true);
+
void writeOperand(Value *Operand);
void writeOperandInternal(Value *Operand);
string getValueName(const Value *V);
private :
+ bool nameAllUsedStructureTypes(Module &M);
void printModule(Module *M);
void printSymbolTable(const SymbolTable &ST);
void printGlobal(const GlobalVariable *GV);
- void printFunctionSignature(const Function *F);
- void printFunctionDecl(const Function *F); // Print just the forward decl
-
+ void printFunctionSignature(const Function *F, bool Prototype);
+
void printFunction(Function *);
void printConstant(Constant *CPV);
}
void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
unsigned Indent);
- void printIndexingExpr(MemAccessInst &MAI);
+ void printIndexingExpression(Value *Ptr, User::op_iterator I,
+ User::op_iterator E);
};
}
makeNameProper(V->getName());
}
- int Slot = Table.getValSlot(V);
+ int Slot = Table->getValSlot(V);
assert(Slot >= 0 && "Invalid value!");
return "ltmp_" + itostr(Slot) + "_" + utostr(V->getType()->getUniqueID());
}
+// A pointer type should not use parens around *'s alone, e.g., (**)
+inline bool ptrTypeNameNeedsParens(const string &NameSoFar) {
+ return (NameSoFar.find_last_not_of('*') != std::string::npos);
+}
+
+// Pass the Type* and the variable name and this prints out the variable
+// declaration.
+//
+ostream &CWriter::printType(const Type *Ty, const string &NameSoFar,
+ bool IgnoreName, bool namedContext) {
+ if (Ty->isPrimitiveType())
+ switch (Ty->getPrimitiveID()) {
+ case Type::VoidTyID: return Out << "void " << NameSoFar;
+ case Type::BoolTyID: return Out << "bool " << NameSoFar;
+ case Type::UByteTyID: return Out << "unsigned char " << NameSoFar;
+ case Type::SByteTyID: return Out << "signed char " << NameSoFar;
+ case Type::UShortTyID: return Out << "unsigned short " << NameSoFar;
+ case Type::ShortTyID: return Out << "short " << NameSoFar;
+ case Type::UIntTyID: return Out << "unsigned " << NameSoFar;
+ case Type::IntTyID: return Out << "int " << NameSoFar;
+ case Type::ULongTyID: return Out << "unsigned long long " << NameSoFar;
+ case Type::LongTyID: return Out << "signed long long " << NameSoFar;
+ case Type::FloatTyID: return Out << "float " << NameSoFar;
+ case Type::DoubleTyID: return Out << "double " << NameSoFar;
+ default :
+ std::cerr << "Unknown primitive type: " << Ty << "\n";
+ abort();
+ }
+
+ // Check to see if the type is named.
+ if (!IgnoreName) {
+ map<const Type *, string>::iterator I = TypeNames.find(Ty);
+ if (I != TypeNames.end()) {
+ return Out << I->second << " " << NameSoFar;
+ }
+ }
+
+ switch (Ty->getPrimitiveID()) {
+ case Type::FunctionTyID: {
+ const FunctionType *MTy = cast<FunctionType>(Ty);
+ printType(MTy->getReturnType(), "");
+ Out << " " << NameSoFar << " (";
+
+ for (FunctionType::ParamTypes::const_iterator
+ I = MTy->getParamTypes().begin(),
+ E = MTy->getParamTypes().end(); I != E; ++I) {
+ if (I != MTy->getParamTypes().begin())
+ Out << ", ";
+ printType(*I, "");
+ }
+ if (MTy->isVarArg()) {
+ if (!MTy->getParamTypes().empty())
+ Out << ", ";
+ Out << "...";
+ }
+ return Out << ")";
+ }
+ case Type::StructTyID: {
+ const StructType *STy = cast<StructType>(Ty);
+ Out << NameSoFar + " {\n";
+ unsigned Idx = 0;
+ for (StructType::ElementTypes::const_iterator
+ I = STy->getElementTypes().begin(),
+ E = STy->getElementTypes().end(); I != E; ++I) {
+ Out << " ";
+ printType(*I, "field" + utostr(Idx++));
+ Out << ";\n";
+ }
+ return Out << "}";
+ }
+
+ case Type::PointerTyID: {
+ const PointerType *PTy = cast<PointerType>(Ty);
+ std::string ptrName = "*" + NameSoFar;
+
+ // Do not need parens around "* NameSoFar" if NameSoFar consists only
+ // of zero or more '*' chars *and* this is not an unnamed pointer type
+ // such as the result type in a cast statement. Otherwise, enclose in ( ).
+ if (ptrTypeNameNeedsParens(NameSoFar) || !namedContext)
+ ptrName = "(" + ptrName + ")"; //
+
+ return printType(PTy->getElementType(), ptrName);
+ }
+
+ case Type::ArrayTyID: {
+ const ArrayType *ATy = cast<ArrayType>(Ty);
+ unsigned NumElements = ATy->getNumElements();
+ return printType(ATy->getElementType(),
+ NameSoFar + "[" + utostr(NumElements) + "]");
+ }
+ default:
+ assert(0 && "Unhandled case in getTypeProps!");
+ abort();
+ }
+
+ return Out;
+}
+
void CWriter::printConstantArray(ConstantArray *CPA) {
// As a special case, print the array as a string if it is an array of
void CWriter::printConstant(Constant *CPV) {
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
switch (CE->getOpcode()) {
+ case Instruction::Cast:
+ Out << "((";
+ printType(CPV->getType());
+ Out << ")";
+ printConstant(cast<Constant>(CPV->getOperand(0)));
+ Out << ")";
+ return;
+
+ case Instruction::GetElementPtr:
+ Out << "&(";
+ printIndexingExpression(CPV->getOperand(0),
+ CPV->op_begin()+1, CPV->op_end());
+ Out << ")";
+ return;
+ case Instruction::Add:
+ Out << "(";
+ printConstant(cast<Constant>(CPV->getOperand(0)));
+ Out << " + ";
+ printConstant(cast<Constant>(CPV->getOperand(1)));
+ Out << ")";
+ return;
+ case Instruction::Sub:
+ Out << "(";
+ printConstant(cast<Constant>(CPV->getOperand(0)));
+ Out << " - ";
+ printConstant(cast<Constant>(CPV->getOperand(1)));
+ Out << ")";
+ return;
+
default:
std::cerr << "CWriter Error: Unhandled constant expression: "
<< CE << "\n";
}
void CWriter::writeOperandInternal(Value *Operand) {
+ if (Instruction *I = dyn_cast<Instruction>(Operand))
+ if (isInlinableInst(*I)) {
+ // Should we inline this instruction to build a tree?
+ Out << "(";
+ visit(*I);
+ Out << ")";
+ return;
+ }
+
if (Operand->hasName()) {
Out << getValueName(Operand);
} else if (Constant *CPV = dyn_cast<Constant>(Operand)) {
printConstant(CPV);
} else {
- int Slot = Table.getValSlot(Operand);
+ int Slot = Table->getValSlot(Operand);
assert(Slot >= 0 && "Malformed LLVM!");
Out << "ltmp_" << Slot << "_" << Operand->getType()->getUniqueID();
}
}
void CWriter::writeOperand(Value *Operand) {
- if (Instruction *I = dyn_cast<Instruction>(Operand))
- if (isInlinableInst(*I)) {
- // Should we inline this instruction to build a tree?
- Out << "(";
- visit(*I);
- Out << ")";
- return;
- }
-
if (isa<GlobalVariable>(Operand))
Out << "(&"; // Global variables are references as their addresses by llvm
Out << ")";
}
+// nameAllUsedStructureTypes - If there are structure types in the module that
+// are used but do not have names assigned to them in the symbol table yet then
+// we assign them names now.
+//
+bool CWriter::nameAllUsedStructureTypes(Module &M) {
+ // Get a set of types that are used by the program...
+ std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
+
+ // Loop over the module symbol table, removing types from UT that are already
+ // named.
+ //
+ SymbolTable *MST = M.getSymbolTableSure();
+ if (MST->find(Type::TypeTy) != MST->end())
+ for (SymbolTable::type_iterator I = MST->type_begin(Type::TypeTy),
+ E = MST->type_end(Type::TypeTy); I != E; ++I)
+ UT.erase(cast<Type>(I->second));
+
+ // UT now contains types that are not named. Loop over it, naming structure
+ // types.
+ //
+ bool Changed = false;
+ for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
+ I != E; ++I)
+ if (const StructType *ST = dyn_cast<StructType>(*I)) {
+ ((Value*)ST)->setName("unnamed", MST);
+ Changed = true;
+ }
+ return Changed;
+}
+
void CWriter::printModule(Module *M) {
// Calculate which global values have names that will collide when we throw
// away type information.
FoundNames.insert(I->getName()); // Otherwise, keep track of name
}
-
// printing stdlib inclusion
// Out << "#include <stdlib.h>\n";
<< "#include <malloc.h>\n"
<< "#include <alloca.h>\n\n"
- // Provide a definition for null if one does not already exist.
+ // Provide a definition for null if one does not already exist,
+ // and for `bool' if not compiling with a C++ compiler.
<< "#ifndef NULL\n#define NULL 0\n#endif\n\n"
- << "typedef unsigned char bool;\n"
+ << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
+
+ << "\n\n/* Global Declarations */\n";
- << "\n\n/* Global Symbols */\n";
+ // First output all the declarations for the program, because C requires
+ // Functions & globals to be declared before they are used.
+ //
// Loop over the symbol table, emitting all named constants...
if (M->hasSymbolTable())
printSymbolTable(*M->getSymbolTable());
- Out << "\n\n/* Global Data */\n";
- for (Module::giterator I = M->gbegin(), E = M->gend(); I != E; ++I) {
- if (I->hasInternalLinkage()) Out << "static ";
- printType(I->getType()->getElementType(), getValueName(I));
+ // Global variable declarations...
+ if (!M->gempty()) {
+ Out << "\n/* Global Variable Declarations */\n";
+ for (Module::giterator I = M->gbegin(), E = M->gend(); I != E; ++I) {
+ Out << (I->hasExternalLinkage() ? "extern " : "static ");
+ printType(I->getType()->getElementType(), getValueName(I));
+ Out << ";\n";
+ }
+ }
- if (I->hasInitializer()) {
- Out << " = " ;
- writeOperand(I->getInitializer());
+ // Function declarations
+ if (!M->empty()) {
+ Out << "\n/* Function Declarations */\n";
+ for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I) {
+ printFunctionSignature(I, true);
+ Out << ";\n";
+ }
+ }
+
+ // Output the global variable contents...
+ if (!M->gempty()) {
+ Out << "\n\n/* Global Data */\n";
+ for (Module::giterator I = M->gbegin(), E = M->gend(); I != E; ++I) {
+ if (I->hasInternalLinkage()) Out << "static ";
+ printType(I->getType()->getElementType(), getValueName(I));
+
+ if (I->hasInitializer()) {
+ Out << " = " ;
+ writeOperand(I->getInitializer());
+ }
+ Out << ";\n";
}
- Out << ";\n";
}
- // First output all the declarations of the functions as C requires Functions
- // be declared before they are used.
- //
- Out << "\n\n/* Function Declarations */\n";
- for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
- printFunctionDecl(I);
-
// Output all of the functions...
- Out << "\n\n/* Function Bodies */\n";
- for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
- printFunction(I);
+ if (!M->empty()) {
+ Out << "\n\n/* Function Bodies */\n";
+ for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
+ printFunction(I);
+ }
}
for (; I != End; ++I)
if (const Type *Ty = dyn_cast<StructType>(I->second)) {
- string Name = "struct l_" + makeNameProper(I->first);
+ string Name = "struct l_" + makeNameProper(I->first);
Out << Name << ";\n";
-
TypeNames.insert(std::make_pair(Ty, Name));
}
}
else
Out << "typedef ";
- Out << calcTypeNameVar(Ty, TypeNames, Name, true) << ";\n";
+ printType(Ty, Name, true);
+ Out << ";\n";
}
}
}
}
-// printFunctionDecl - Print function declaration
-//
-void CWriter::printFunctionDecl(const Function *F) {
- printFunctionSignature(F);
- Out << ";\n";
-}
-
-void CWriter::printFunctionSignature(const Function *F) {
+void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
if (F->hasInternalLinkage()) Out << "static ";
// Loop over the arguments, printing them...
if (!F->isExternal()) {
if (!F->aempty()) {
- printType(F->afront().getType(), getValueName(F->abegin()));
+ string ArgName;
+ if (F->abegin()->hasName() || !Prototype)
+ ArgName = getValueName(F->abegin());
+
+ printType(F->afront().getType(), ArgName);
for (Function::const_aiterator I = ++F->abegin(), E = F->aend();
I != E; ++I) {
Out << ", ";
- printType(I->getType(), getValueName(I));
+ if (I->hasName() || !Prototype)
+ ArgName = getValueName(I);
+ else
+ ArgName = "";
+ printType(I->getType(), ArgName);
}
}
} else {
void CWriter::printFunction(Function *F) {
if (F->isExternal()) return;
- Table.incorporateFunction(F);
+ Table->incorporateFunction(F);
- printFunctionSignature(F);
+ printFunctionSignature(F, false);
Out << " {\n";
// print local variable information for the function
}
Out << "}\n\n";
- Table.purgeFunction();
+ Table->purgeFunction();
}
// Specific Instruction type classes... note that all of the casts are
void CWriter::visitCastInst(CastInst &I) {
Out << "(";
- printType(I.getType());
+ printType(I.getType(), string(""),/*ignoreName*/false, /*namedContext*/false);
Out << ")";
writeOperand(I.getOperand(0));
}
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
const Type *RetTy = FTy->getReturnType();
- Out << getValueName(I.getOperand(0)) << "(";
+ writeOperand(I.getOperand(0));
+ Out << "(";
if (I.getNumOperands() > 1) {
writeOperand(I.getOperand(1));
Out << ")";
}
-void CWriter::printIndexingExpr(MemAccessInst &MAI) {
- MemAccessInst::op_iterator I = MAI.idx_begin(), E = MAI.idx_end();
+void CWriter::printIndexingExpression(Value *Ptr, User::op_iterator I,
+ User::op_iterator E) {
+ bool HasImplicitAddress = false;
+ // If accessing a global value with no indexing, avoid *(&GV) syndrome
+ if (GlobalValue *V = dyn_cast<GlobalValue>(Ptr)) {
+ HasImplicitAddress = true;
+ } else if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(Ptr)) {
+ HasImplicitAddress = true;
+ Ptr = CPR->getValue(); // Get to the global...
+ }
+
if (I == E) {
- // If accessing a global value with no indexing, avoid *(&GV) syndrome
- if (GlobalValue *V = dyn_cast<GlobalValue>(MAI.getPointerOperand())) {
- writeOperandInternal(V);
- return;
- }
+ if (!HasImplicitAddress)
+ Out << "*"; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
- Out << "*"; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
+ writeOperandInternal(Ptr);
+ return;
}
- writeOperand(MAI.getPointerOperand());
+ const Constant *CI = dyn_cast<Constant>(I->get());
+ if (HasImplicitAddress && (!CI || !CI->isNullValue()))
+ Out << "(&";
+
+ writeOperandInternal(Ptr);
- if (I == E) return;
+ if (HasImplicitAddress && (!CI || !CI->isNullValue()))
+ Out << ")";
// Print out the -> operator if possible...
- const Constant *CI = dyn_cast<Constant>(I->get());
- if (CI && CI->isNullValue() && I+1 != E &&
- (*(I+1))->getType() == Type::UByteTy) {
- Out << "->field" << cast<ConstantUInt>(*(I+1))->getValue();
- I += 2;
+ if (CI && CI->isNullValue() && I+1 != E) {
+ if ((*(I+1))->getType() == Type::UByteTy) {
+ Out << (HasImplicitAddress ? "." : "->");
+ Out << "field" << cast<ConstantUInt>(*(I+1))->getValue();
+ I += 2;
+ } else { // First array index of 0: Just skip it
+ ++I;
+ }
}
-
+
for (; I != E; ++I)
- if ((*I)->getType() == Type::UIntTy) {
- Out << "[";
+ if ((*I)->getType() == Type::LongTy) {
+ Out << "[((int) ("; // sign-extend from 32 (to 64) bits
writeOperand(*I);
- Out << "]";
+ Out << " * sizeof(";
+ printType(cast<PointerType>(Ptr->getType())->getElementType());
+ Out << "))) / sizeof(";
+ printType(cast<PointerType>(Ptr->getType())->getElementType());
+ Out << ")]";
} else {
Out << ".field" << cast<ConstantUInt>(*I)->getValue();
}
}
void CWriter::visitLoadInst(LoadInst &I) {
- printIndexingExpr(I);
+ Out << "*";
+ writeOperand(I.getOperand(0));
}
void CWriter::visitStoreInst(StoreInst &I) {
- printIndexingExpr(I);
+ Out << "*";
+ writeOperand(I.getPointerOperand());
Out << " = ";
writeOperand(I.getOperand(0));
}
void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
Out << "&";
- printIndexingExpr(I);
+ printIndexingExpression(I.getPointerOperand(), I.idx_begin(), I.idx_end());
}
//===----------------------------------------------------------------------===//
// External Interface declaration
//===----------------------------------------------------------------------===//
-void WriteToC(const Module *M, ostream &Out) {
- assert(M && "You can't write a null module!!");
- SlotCalculator SlotTable(M, false);
- CWriter W(Out, SlotTable, M);
- W.write((Module*)M);
- Out.flush();
-}
+Pass *createWriteToCPass(std::ostream &o) { return new CWriter(o); }
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