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//===-- CPPBackend.cpp - Library for converting LLVM code to C++ code -----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the writing of the LLVM IR as a set of C++ calls to the
// LLVM IR interface. The input module is assumed to be verified.
//
//===----------------------------------------------------------------------===//
#include "CPPTargetMachine.h"
#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/InlineAsm.h"
#include "llvm/Instruction.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/PassManager.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
#include <algorithm>
#include <cstdio>
#include <map>
#include <set>
using namespace llvm;
#include <Relooper.h>
static cl::opt<std::string>
FuncName("cppfname", cl::desc("Specify the name of the generated function"),
cl::value_desc("function name"));
enum WhatToGenerate {
GenProgram,
GenModule,
GenContents,
GenFunction,
GenFunctions,
GenInline,
GenVariable,
GenType
};
static cl::opt<WhatToGenerate> GenerationType("cppgen", cl::Optional,
cl::desc("Choose what kind of output to generate"),
cl::init(GenProgram),
cl::values(
clEnumValN(GenProgram, "program", "Generate a complete program"),
clEnumValN(GenModule, "module", "Generate a module definition"),
clEnumValN(GenContents, "contents", "Generate contents of a module"),
clEnumValN(GenFunction, "function", "Generate a function definition"),
clEnumValN(GenFunctions,"functions", "Generate all function definitions"),
clEnumValN(GenInline, "inline", "Generate an inline function"),
clEnumValN(GenVariable, "variable", "Generate a variable definition"),
clEnumValN(GenType, "type", "Generate a type definition"),
clEnumValEnd
)
);
static cl::opt<std::string> NameToGenerate("cppfor", cl::Optional,
cl::desc("Specify the name of the thing to generate"),
cl::init("!bad!"));
extern "C" void LLVMInitializeCppBackendTarget() {
// Register the target.
RegisterTargetMachine<CPPTargetMachine> X(TheCppBackendTarget);
}
namespace {
typedef std::vector<Type*> TypeList;
typedef std::map<Type*,std::string> TypeMap;
typedef std::map<const Value*,std::string> ValueMap;
typedef std::set<std::string> NameSet;
typedef std::set<Type*> TypeSet;
typedef std::set<const Value*> ValueSet;
typedef std::map<const Value*,std::string> ForwardRefMap;
/// CppWriter - This class is the main chunk of code that converts an LLVM
/// module to a C++ translation unit.
class CppWriter : public ModulePass {
formatted_raw_ostream &Out;
const Module *TheModule;
uint64_t uniqueNum;
TypeMap TypeNames;
ValueMap ValueNames;
NameSet UsedNames;
TypeSet DefinedTypes;
ValueSet DefinedValues;
ForwardRefMap ForwardRefs;
bool is_inline;
unsigned indent_level;
public:
static char ID;
explicit CppWriter(formatted_raw_ostream &o) :
ModulePass(ID), Out(o), uniqueNum(0), is_inline(false), indent_level(0){}
virtual const char *getPassName() const { return "C++ backend"; }
bool runOnModule(Module &M);
void printProgram(const std::string& fname, const std::string& modName );
void printModule(const std::string& fname, const std::string& modName );
void printContents(const std::string& fname, const std::string& modName );
void printFunction(const std::string& fname, const std::string& funcName );
void printFunctions();
void printInline(const std::string& fname, const std::string& funcName );
void printVariable(const std::string& fname, const std::string& varName );
void printType(const std::string& fname, const std::string& typeName );
void error(const std::string& msg);
formatted_raw_ostream& nl(formatted_raw_ostream &Out, int delta = 0);
inline void in() { indent_level++; }
inline void out() { if (indent_level >0) indent_level--; }
private:
void printLinkageType(GlobalValue::LinkageTypes LT);
void printVisibilityType(GlobalValue::VisibilityTypes VisTypes);
void printThreadLocalMode(GlobalVariable::ThreadLocalMode TLM);
void printCallingConv(CallingConv::ID cc);
void printEscapedString(const std::string& str);
void printCFP(const ConstantFP* CFP);
std::string getCppName(Type* val);
inline void printCppName(Type* val);
std::string getCppName(const Value* val);
inline void printCppName(const Value* val);
void printAttributes(const AttrListPtr &PAL, const std::string &name);
void printType(Type* Ty);
void printTypes(const Module* M);
void printConstant(const Constant *CPV);
void printConstants(const Module* M);
void printVariableUses(const GlobalVariable *GV);
void printVariableHead(const GlobalVariable *GV);
void printVariableBody(const GlobalVariable *GV);
void printFunctionUses(const Function *F);
void printFunctionHead(const Function *F);
void printFunctionBody(const Function *F);
std::string generateInstruction(const Instruction *I);
std::string getOpName(const Value*);
void printModuleBody();
unsigned stackAlign(unsigned x) {
return x + (x%4 != 0 ? 4 - x%4 : 0);
}
};
} // end anonymous namespace.
formatted_raw_ostream &CppWriter::nl(formatted_raw_ostream &Out, int delta) {
Out << '\n';
if (delta >= 0 || indent_level >= unsigned(-delta))
indent_level += delta;
Out.indent(indent_level);
return Out;
}
static inline void sanitize(std::string &str) {
for (size_t i = 0; i < str.length(); ++i)
if (!isalnum(str[i]) && str[i] != '_')
str[i] = '_';
}
static std::string getTypePrefix(Type *Ty) {
switch (Ty->getTypeID()) {
case Type::VoidTyID: return "void_";
case Type::IntegerTyID:
return "int" + utostr(cast<IntegerType>(Ty)->getBitWidth()) + "_";
case Type::FloatTyID: return "float_";
case Type::DoubleTyID: return "double_";
case Type::LabelTyID: return "label_";
case Type::FunctionTyID: return "func_";
case Type::StructTyID: return "struct_";
case Type::ArrayTyID: return "array_";
case Type::PointerTyID: return "ptr_";
case Type::VectorTyID: return "packed_";
default: return "other_";
}
}
void CppWriter::error(const std::string& msg) {
report_fatal_error(msg);
}
static inline std::string ftostr(const APFloat& V) {
std::string Buf;
if (&V.getSemantics() == &APFloat::IEEEdouble) {
raw_string_ostream(Buf) << V.convertToDouble();
return Buf;
} else if (&V.getSemantics() == &APFloat::IEEEsingle) {
raw_string_ostream(Buf) << (double)V.convertToFloat();
return Buf;
}
return "<unknown format in ftostr>"; // error
}
// printCFP - Print a floating point constant .. very carefully :)
// This makes sure that conversion to/from floating yields the same binary
// result so that we don't lose precision.
void CppWriter::printCFP(const ConstantFP *CFP) {
bool ignored;
APFloat APF = APFloat(CFP->getValueAPF()); // copy
if (CFP->getType() == Type::getFloatTy(CFP->getContext()))
APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
Out << "ConstantFP::get(mod->getContext(), ";
Out << "APFloat(";
#if HAVE_PRINTF_A
char Buffer[100];
sprintf(Buffer, "%A", APF.convertToDouble());
if ((!strncmp(Buffer, "0x", 2) ||
!strncmp(Buffer, "-0x", 3) ||
!strncmp(Buffer, "+0x", 3)) &&
APF.bitwiseIsEqual(APFloat(atof(Buffer)))) {
if (CFP->getType() == Type::getDoubleTy(CFP->getContext()))
Out << "BitsToDouble(" << Buffer << ")";
else
Out << "BitsToFloat((float)" << Buffer << ")";
Out << ")";
} else {
#endif
std::string StrVal = ftostr(CFP->getValueAPF());
while (StrVal[0] == ' ')
StrVal.erase(StrVal.begin());
// Check to make sure that the stringized number is not some string like
// "Inf" or NaN. Check that the string matches the "[-+]?[0-9]" regex.
if (((StrVal[0] >= '0' && StrVal[0] <= '9') ||
((StrVal[0] == '-' || StrVal[0] == '+') &&
(StrVal[1] >= '0' && StrVal[1] <= '9'))) &&
(CFP->isExactlyValue(atof(StrVal.c_str())))) {
if (CFP->getType() == Type::getDoubleTy(CFP->getContext()))
Out << StrVal;
else
Out << StrVal << "f";
} else if (CFP->getType() == Type::getDoubleTy(CFP->getContext()))
Out << "BitsToDouble(0x"
<< utohexstr(CFP->getValueAPF().bitcastToAPInt().getZExtValue())
<< "ULL) /* " << StrVal << " */";
else
Out << "BitsToFloat(0x"
<< utohexstr((uint32_t)CFP->getValueAPF().
bitcastToAPInt().getZExtValue())
<< "U) /* " << StrVal << " */";
Out << ")";
#if HAVE_PRINTF_A
}
#endif
Out << ")";
}
void CppWriter::printCallingConv(CallingConv::ID cc){
// Print the calling convention.
switch (cc) {
case CallingConv::C: Out << "CallingConv::C"; break;
case CallingConv::Fast: Out << "CallingConv::Fast"; break;
case CallingConv::Cold: Out << "CallingConv::Cold"; break;
case CallingConv::FirstTargetCC: Out << "CallingConv::FirstTargetCC"; break;
default: Out << cc; break;
}
}
void CppWriter::printLinkageType(GlobalValue::LinkageTypes LT) {
switch (LT) {
case GlobalValue::InternalLinkage:
Out << "GlobalValue::InternalLinkage"; break;
case GlobalValue::PrivateLinkage:
Out << "GlobalValue::PrivateLinkage"; break;
case GlobalValue::LinkerPrivateLinkage:
Out << "GlobalValue::LinkerPrivateLinkage"; break;
case GlobalValue::LinkerPrivateWeakLinkage:
Out << "GlobalValue::LinkerPrivateWeakLinkage"; break;
case GlobalValue::LinkerPrivateWeakDefAutoLinkage:
Out << "GlobalValue::LinkerPrivateWeakDefAutoLinkage"; break;
case GlobalValue::AvailableExternallyLinkage:
Out << "GlobalValue::AvailableExternallyLinkage "; break;
case GlobalValue::LinkOnceAnyLinkage:
Out << "GlobalValue::LinkOnceAnyLinkage "; break;
case GlobalValue::LinkOnceODRLinkage:
Out << "GlobalValue::LinkOnceODRLinkage "; break;
case GlobalValue::WeakAnyLinkage:
Out << "GlobalValue::WeakAnyLinkage"; break;
case GlobalValue::WeakODRLinkage:
Out << "GlobalValue::WeakODRLinkage"; break;
case GlobalValue::AppendingLinkage:
Out << "GlobalValue::AppendingLinkage"; break;
case GlobalValue::ExternalLinkage:
Out << "GlobalValue::ExternalLinkage"; break;
case GlobalValue::DLLImportLinkage:
Out << "GlobalValue::DLLImportLinkage"; break;
case GlobalValue::DLLExportLinkage:
Out << "GlobalValue::DLLExportLinkage"; break;
case GlobalValue::ExternalWeakLinkage:
Out << "GlobalValue::ExternalWeakLinkage"; break;
case GlobalValue::CommonLinkage:
Out << "GlobalValue::CommonLinkage"; break;
}
}
void CppWriter::printVisibilityType(GlobalValue::VisibilityTypes VisType) {
switch (VisType) {
case GlobalValue::DefaultVisibility:
Out << "GlobalValue::DefaultVisibility";
break;
case GlobalValue::HiddenVisibility:
Out << "GlobalValue::HiddenVisibility";
break;
case GlobalValue::ProtectedVisibility:
Out << "GlobalValue::ProtectedVisibility";
break;
}
}
void CppWriter::printThreadLocalMode(GlobalVariable::ThreadLocalMode TLM) {
switch (TLM) {
case GlobalVariable::NotThreadLocal:
Out << "GlobalVariable::NotThreadLocal";
break;
case GlobalVariable::GeneralDynamicTLSModel:
Out << "GlobalVariable::GeneralDynamicTLSModel";
break;
case GlobalVariable::LocalDynamicTLSModel:
Out << "GlobalVariable::LocalDynamicTLSModel";
break;
case GlobalVariable::InitialExecTLSModel:
Out << "GlobalVariable::InitialExecTLSModel";
break;
case GlobalVariable::LocalExecTLSModel:
Out << "GlobalVariable::LocalExecTLSModel";
break;
}
}
// printEscapedString - Print each character of the specified string, escaping
// it if it is not printable or if it is an escape char.
void CppWriter::printEscapedString(const std::string &Str) {
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
unsigned char C = Str[i];
if (isprint(C) && C != '"' && C != '\\') {
Out << C;
} else {
Out << "\\x"
<< (char) ((C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'))
<< (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
}
}
}
std::string CppWriter::getCppName(Type* Ty) {
// First, handle the primitive types .. easy
if (Ty->isPrimitiveType() || Ty->isIntegerTy()) {
switch (Ty->getTypeID()) {
case Type::VoidTyID: return "Type::getVoidTy(mod->getContext())";
case Type::IntegerTyID: {
unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
return "IntegerType::get(mod->getContext(), " + utostr(BitWidth) + ")";
}
case Type::X86_FP80TyID: return "Type::getX86_FP80Ty(mod->getContext())";
case Type::FloatTyID: return "Type::getFloatTy(mod->getContext())";
case Type::DoubleTyID: return "Type::getDoubleTy(mod->getContext())";
case Type::LabelTyID: return "Type::getLabelTy(mod->getContext())";
case Type::X86_MMXTyID: return "Type::getX86_MMXTy(mod->getContext())";
default:
error("Invalid primitive type");
break;
}
// shouldn't be returned, but make it sensible
return "Type::getVoidTy(mod->getContext())";
}
// Now, see if we've seen the type before and return that
TypeMap::iterator I = TypeNames.find(Ty);
if (I != TypeNames.end())
return I->second;
// Okay, let's build a new name for this type. Start with a prefix
const char* prefix = 0;
switch (Ty->getTypeID()) {
case Type::FunctionTyID: prefix = "FuncTy_"; break;
case Type::StructTyID: prefix = "StructTy_"; break;
case Type::ArrayTyID: prefix = "ArrayTy_"; break;
case Type::PointerTyID: prefix = "PointerTy_"; break;
case Type::VectorTyID: prefix = "VectorTy_"; break;
default: prefix = "OtherTy_"; break; // prevent breakage
}
// See if the type has a name in the symboltable and build accordingly
std::string name;
if (StructType *STy = dyn_cast<StructType>(Ty))
if (STy->hasName())
name = STy->getName();
if (name.empty())
name = utostr(uniqueNum++);
name = std::string(prefix) + name;
sanitize(name);
// Save the name
return TypeNames[Ty] = name;
}
void CppWriter::printCppName(Type* Ty) {
printEscapedString(getCppName(Ty));
}
std::string CppWriter::getCppName(const Value* val) {
std::string name;
ValueMap::iterator I = ValueNames.find(val);
if (I != ValueNames.end() && I->first == val)
return I->second;
if (val->hasName()) {
name = std::string("_") + val->getName().str();
sanitize(name);
} else {
if (const GlobalVariable* GV = dyn_cast<GlobalVariable>(val)) {
name = std::string("gvar_") +
getTypePrefix(GV->getType()->getElementType());
} else if (isa<Function>(val)) {
name = std::string("func_");
} else if (const Constant* C = dyn_cast<Constant>(val)) {
name = std::string("const_") + getTypePrefix(C->getType());
} else if (const Argument* Arg = dyn_cast<Argument>(val)) {
if (is_inline) {
unsigned argNum = std::distance(Arg->getParent()->arg_begin(),
Function::const_arg_iterator(Arg)) + 1;
name = std::string("arg_") + utostr(argNum);
NameSet::iterator NI = UsedNames.find(name);
if (NI != UsedNames.end())
name += std::string("_") + utostr(uniqueNum++);
UsedNames.insert(name);
return ValueNames[val] = name;
} else {
name = getTypePrefix(val->getType());
}
} else {
name = getTypePrefix(val->getType());
}
name += utostr(uniqueNum++);
sanitize(name);
NameSet::iterator NI = UsedNames.find(name);
if (NI != UsedNames.end())
name += std::string("_") + utostr(uniqueNum++);
UsedNames.insert(name);
}
return ValueNames[val] = name;
}
void CppWriter::printCppName(const Value* val) {
printEscapedString(getCppName(val));
}
void CppWriter::printAttributes(const AttrListPtr &PAL,
const std::string &name) {
Out << "AttrListPtr " << name << "_PAL;";
nl(Out);
if (!PAL.isEmpty()) {
Out << '{'; in(); nl(Out);
Out << "SmallVector<AttributeWithIndex, 4> Attrs;"; nl(Out);
Out << "AttributeWithIndex PAWI;"; nl(Out);
for (unsigned i = 0; i < PAL.getNumSlots(); ++i) {
unsigned index = PAL.getSlot(i).Index;
Attributes attrs = PAL.getSlot(i).Attrs;
Out << "PAWI.Index = " << index << "U; PAWI.Attrs = Attribute::None ";
#define HANDLE_ATTR(X) \
if (attrs & Attribute::X) \
Out << " | Attribute::" #X; \
attrs &= ~Attribute::X;
HANDLE_ATTR(SExt);
HANDLE_ATTR(ZExt);
HANDLE_ATTR(NoReturn);
HANDLE_ATTR(InReg);
HANDLE_ATTR(StructRet);
HANDLE_ATTR(NoUnwind);
HANDLE_ATTR(NoAlias);
HANDLE_ATTR(ByVal);
HANDLE_ATTR(Nest);
HANDLE_ATTR(ReadNone);
HANDLE_ATTR(ReadOnly);
HANDLE_ATTR(NoInline);
HANDLE_ATTR(AlwaysInline);
HANDLE_ATTR(OptimizeForSize);
HANDLE_ATTR(StackProtect);
HANDLE_ATTR(StackProtectReq);
HANDLE_ATTR(NoCapture);
HANDLE_ATTR(NoRedZone);
HANDLE_ATTR(NoImplicitFloat);
HANDLE_ATTR(Naked);
HANDLE_ATTR(InlineHint);
HANDLE_ATTR(ReturnsTwice);
HANDLE_ATTR(UWTable);
HANDLE_ATTR(NonLazyBind);
#undef HANDLE_ATTR
if (attrs & Attribute::StackAlignment)
Out << " | Attribute::constructStackAlignmentFromInt("
<< Attribute::getStackAlignmentFromAttrs(attrs)
<< ")";
attrs &= ~Attribute::StackAlignment;
assert(attrs == 0 && "Unhandled attribute!");
Out << ";";
nl(Out);
Out << "Attrs.push_back(PAWI);";
nl(Out);
}
Out << name << "_PAL = AttrListPtr::get(Attrs);";
nl(Out);
out(); nl(Out);
Out << '}'; nl(Out);
}
}
void CppWriter::printType(Type* Ty) {
// We don't print definitions for primitive types
if (Ty->isPrimitiveType() || Ty->isIntegerTy())
return;
// If we already defined this type, we don't need to define it again.
if (DefinedTypes.find(Ty) != DefinedTypes.end())
return;
// Everything below needs the name for the type so get it now.
std::string typeName(getCppName(Ty));
// Print the type definition
switch (Ty->getTypeID()) {
case Type::FunctionTyID: {
FunctionType* FT = cast<FunctionType>(Ty);
Out << "std::vector<Type*>" << typeName << "_args;";
nl(Out);
FunctionType::param_iterator PI = FT->param_begin();
FunctionType::param_iterator PE = FT->param_end();
for (; PI != PE; ++PI) {
Type* argTy = static_cast<Type*>(*PI);
printType(argTy);
std::string argName(getCppName(argTy));
Out << typeName << "_args.push_back(" << argName;
Out << ");";
nl(Out);
}
printType(FT->getReturnType());
std::string retTypeName(getCppName(FT->getReturnType()));
Out << "FunctionType* " << typeName << " = FunctionType::get(";
in(); nl(Out) << "/*Result=*/" << retTypeName;
Out << ",";
nl(Out) << "/*Params=*/" << typeName << "_args,";
nl(Out) << "/*isVarArg=*/" << (FT->isVarArg() ? "true" : "false") << ");";
out();
nl(Out);
break;
}
case Type::StructTyID: {
StructType* ST = cast<StructType>(Ty);
if (!ST->isLiteral()) {
Out << "StructType *" << typeName << " = mod->getTypeByName(\"";
printEscapedString(ST->getName());
Out << "\");";
nl(Out);
Out << "if (!" << typeName << ") {";
nl(Out);
Out << typeName << " = ";
Out << "StructType::create(mod->getContext(), \"";
printEscapedString(ST->getName());
Out << "\");";
nl(Out);
Out << "}";
nl(Out);
// Indicate that this type is now defined.
DefinedTypes.insert(Ty);
}
Out << "std::vector<Type*>" << typeName << "_fields;";
nl(Out);
StructType::element_iterator EI = ST->element_begin();
StructType::element_iterator EE = ST->element_end();
for (; EI != EE; ++EI) {
Type* fieldTy = static_cast<Type*>(*EI);
printType(fieldTy);
std::string fieldName(getCppName(fieldTy));
Out << typeName << "_fields.push_back(" << fieldName;
Out << ");";
nl(Out);
}
if (ST->isLiteral()) {
Out << "StructType *" << typeName << " = ";
Out << "StructType::get(" << "mod->getContext(), ";
} else {
Out << "if (" << typeName << "->isOpaque()) {";
nl(Out);
Out << typeName << "->setBody(";
}
Out << typeName << "_fields, /*isPacked=*/"
<< (ST->isPacked() ? "true" : "false") << ");";
nl(Out);
if (!ST->isLiteral()) {
Out << "}";
nl(Out);
}
break;
}
case Type::ArrayTyID: {
ArrayType* AT = cast<ArrayType>(Ty);
Type* ET = AT->getElementType();
printType(ET);
if (DefinedTypes.find(Ty) == DefinedTypes.end()) {
std::string elemName(getCppName(ET));
Out << "ArrayType* " << typeName << " = ArrayType::get("
<< elemName
<< ", " << utostr(AT->getNumElements()) << ");";
nl(Out);
}
break;
}
case Type::PointerTyID: {
PointerType* PT = cast<PointerType>(Ty);
Type* ET = PT->getElementType();
printType(ET);
if (DefinedTypes.find(Ty) == DefinedTypes.end()) {
std::string elemName(getCppName(ET));
Out << "PointerType* " << typeName << " = PointerType::get("
<< elemName
<< ", " << utostr(PT->getAddressSpace()) << ");";
nl(Out);
}
break;
}
case Type::VectorTyID: {
VectorType* PT = cast<VectorType>(Ty);
Type* ET = PT->getElementType();
printType(ET);
if (DefinedTypes.find(Ty) == DefinedTypes.end()) {
std::string elemName(getCppName(ET));
Out << "VectorType* " << typeName << " = VectorType::get("
<< elemName
<< ", " << utostr(PT->getNumElements()) << ");";
nl(Out);
}
break;
}
default:
error("Invalid TypeID");
}
// Indicate that this type is now defined.
DefinedTypes.insert(Ty);
// Finally, separate the type definition from other with a newline.
nl(Out);
}
void CppWriter::printTypes(const Module* M) {
// Add all of the global variables to the value table.
for (Module::const_global_iterator I = TheModule->global_begin(),
E = TheModule->global_end(); I != E; ++I) {
if (I->hasInitializer())
printType(I->getInitializer()->getType());
printType(I->getType());
}
// Add all the functions to the table
for (Module::const_iterator FI = TheModule->begin(), FE = TheModule->end();
FI != FE; ++FI) {
printType(FI->getReturnType());
printType(FI->getFunctionType());
// Add all the function arguments
for (Function::const_arg_iterator AI = FI->arg_begin(),
AE = FI->arg_end(); AI != AE; ++AI) {
printType(AI->getType());
}
// Add all of the basic blocks and instructions
for (Function::const_iterator BB = FI->begin(),
E = FI->end(); BB != E; ++BB) {
printType(BB->getType());
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E;
++I) {
printType(I->getType());
for (unsigned i = 0; i < I->getNumOperands(); ++i)
printType(I->getOperand(i)->getType());
}
}
}
}
// printConstant - Print out a constant pool entry...
void CppWriter::printConstant(const Constant *CV) {
// First, if the constant is actually a GlobalValue (variable or function)
// or its already in the constant list then we've printed it already and we
// can just return.
if (isa<GlobalValue>(CV) || ValueNames.find(CV) != ValueNames.end())
return;
std::string constName(getCppName(CV));
std::string typeName(getCppName(CV->getType()));
Out << "var " << constName << " = ";
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
std::string constValue = CI->getValue().toString(10, true);
Out << constValue << ";";
} else if (isa<ConstantAggregateZero>(CV)) {
Out << "ConstantAggregateZero::get(" << typeName << ");";
} else if (isa<ConstantPointerNull>(CV)) {
Out << "ConstantPointerNull::get(" << typeName << ");";
} else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
printCFP(CFP);
Out << ";";
} else if (const ConstantArray *CA = dyn_cast<ConstantArray>(CV)) {
Out << "std::vector<Constant*> " << constName << "_elems;";
nl(Out);
unsigned N = CA->getNumOperands();
for (unsigned i = 0; i < N; ++i) {
printConstant(CA->getOperand(i)); // recurse to print operands
Out << constName << "_elems.push_back("
<< getCppName(CA->getOperand(i)) << ");";
nl(Out);
}
Out << "Constant* " << constName << " = ConstantArray::get("
<< typeName << ", " << constName << "_elems);";
} else if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(CV)) {
Out << "std::vector<Constant*> " << constName << "_fields;";
nl(Out);
unsigned N = CS->getNumOperands();
for (unsigned i = 0; i < N; i++) {
printConstant(CS->getOperand(i));
Out << constName << "_fields.push_back("
<< getCppName(CS->getOperand(i)) << ");";
nl(Out);
}
Out << "Constant* " << constName << " = ConstantStruct::get("
<< typeName << ", " << constName << "_fields);";
} else if (const ConstantVector *CVec = dyn_cast<ConstantVector>(CV)) {
Out << "std::vector<Constant*> " << constName << "_elems;";
nl(Out);
unsigned N = CVec->getNumOperands();
for (unsigned i = 0; i < N; ++i) {
printConstant(CVec->getOperand(i));
Out << constName << "_elems.push_back("
<< getCppName(CVec->getOperand(i)) << ");";
nl(Out);
}
Out << "Constant* " << constName << " = ConstantVector::get("
<< typeName << ", " << constName << "_elems);";
} else if (isa<UndefValue>(CV)) {
Out << "UndefValue* " << constName << " = UndefValue::get("
<< typeName << ");";
} else if (const ConstantDataSequential *CDS =
dyn_cast<ConstantDataSequential>(CV)) {
if (CDS->isString()) {
Out << "allocate([";
StringRef Str = CDS->getAsString();
for (unsigned int i = 0; i < Str.size(); i++) {
Out << (unsigned int)(Str.data()[i]);
if (i < Str.size()-1) Out << ",";
}
Out << "], 'i8', ALLOC_STATIC);";
} else {
// TODO: Could generate more efficient code generating CDS calls instead.
Out << "std::vector<Constant*> " << constName << "_elems;";
nl(Out);
for (unsigned i = 0; i != CDS->getNumElements(); ++i) {
Constant *Elt = CDS->getElementAsConstant(i);
printConstant(Elt);
Out << constName << "_elems.push_back(" << getCppName(Elt) << ");";
nl(Out);
}
Out << "Constant* " << constName;
if (isa<ArrayType>(CDS->getType()))
Out << " = ConstantArray::get(";
else
Out << " = ConstantVector::get(";
Out << typeName << ", " << constName << "_elems);";
}
} else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
if (CE->getOpcode() == Instruction::GetElementPtr) {
Out << "allocate([";
for (unsigned i = 0; i < CE->getNumOperands(); ++i ) {
Out << getCppName(CE->getOperand(i));
if (i < CE->getNumOperands()-1) Out << ",";
}
Out << "], 'i32', ALLOC_STATIC);";
} else if (CE->isCast()) {
printConstant(CE->getOperand(0));
Out << "Constant* " << constName << " = ConstantExpr::getCast(";
switch (CE->getOpcode()) {
default: llvm_unreachable("Invalid cast opcode");
case Instruction::Trunc: Out << "Instruction::Trunc"; break;
case Instruction::ZExt: Out << "Instruction::ZExt"; break;
case Instruction::SExt: Out << "Instruction::SExt"; break;
case Instruction::FPTrunc: Out << "Instruction::FPTrunc"; break;
case Instruction::FPExt: Out << "Instruction::FPExt"; break;
case Instruction::FPToUI: Out << "Instruction::FPToUI"; break;
case Instruction::FPToSI: Out << "Instruction::FPToSI"; break;
case Instruction::UIToFP: Out << "Instruction::UIToFP"; break;
case Instruction::SIToFP: Out << "Instruction::SIToFP"; break;
case Instruction::PtrToInt: Out << "Instruction::PtrToInt"; break;
case Instruction::IntToPtr: Out << "Instruction::IntToPtr"; break;
case Instruction::BitCast: Out << "Instruction::BitCast"; break;
}
Out << ", " << getCppName(CE->getOperand(0)) << ", "
<< getCppName(CE->getType()) << ");";
} else {
unsigned N = CE->getNumOperands();
for (unsigned i = 0; i < N; ++i ) {
printConstant(CE->getOperand(i));
}
Out << "Constant* " << constName << " = ConstantExpr::";
switch (CE->getOpcode()) {
case Instruction::Add: Out << "getAdd("; break;
case Instruction::FAdd: Out << "getFAdd("; break;
case Instruction::Sub: Out << "getSub("; break;
case Instruction::FSub: Out << "getFSub("; break;
case Instruction::Mul: Out << "getMul("; break;
case Instruction::FMul: Out << "getFMul("; break;
case Instruction::UDiv: Out << "getUDiv("; break;
case Instruction::SDiv: Out << "getSDiv("; break;
case Instruction::FDiv: Out << "getFDiv("; break;
case Instruction::URem: Out << "getURem("; break;
case Instruction::SRem: Out << "getSRem("; break;
case Instruction::FRem: Out << "getFRem("; break;
case Instruction::And: Out << "getAnd("; break;
case Instruction::Or: Out << "getOr("; break;
case Instruction::Xor: Out << "getXor("; break;
case Instruction::ICmp:
Out << "getICmp(ICmpInst::ICMP_";
switch (CE->getPredicate()) {
case ICmpInst::ICMP_EQ: Out << "EQ"; break;
case ICmpInst::ICMP_NE: Out << "NE"; break;
case ICmpInst::ICMP_SLT: Out << "SLT"; break;
case ICmpInst::ICMP_ULT: Out << "ULT"; break;
case ICmpInst::ICMP_SGT: Out << "SGT"; break;
case ICmpInst::ICMP_UGT: Out << "UGT"; break;
case ICmpInst::ICMP_SLE: Out << "SLE"; break;
case ICmpInst::ICMP_ULE: Out << "ULE"; break;
case ICmpInst::ICMP_SGE: Out << "SGE"; break;
case ICmpInst::ICMP_UGE: Out << "UGE"; break;
default: error("Invalid ICmp Predicate");
}
break;
case Instruction::FCmp:
Out << "getFCmp(FCmpInst::FCMP_";
switch (CE->getPredicate()) {
case FCmpInst::FCMP_FALSE: Out << "FALSE"; break;
case FCmpInst::FCMP_ORD: Out << "ORD"; break;
case FCmpInst::FCMP_UNO: Out << "UNO"; break;
case FCmpInst::FCMP_OEQ: Out << "OEQ"; break;
case FCmpInst::FCMP_UEQ: Out << "UEQ"; break;
case FCmpInst::FCMP_ONE: Out << "ONE"; break;
case FCmpInst::FCMP_UNE: Out << "UNE"; break;
case FCmpInst::FCMP_OLT: Out << "OLT"; break;
case FCmpInst::FCMP_ULT: Out << "ULT"; break;
case FCmpInst::FCMP_OGT: Out << "OGT"; break;
case FCmpInst::FCMP_UGT: Out << "UGT"; break;
case FCmpInst::FCMP_OLE: Out << "OLE"; break;
case FCmpInst::FCMP_ULE: Out << "ULE"; break;
case FCmpInst::FCMP_OGE: Out << "OGE"; break;
case FCmpInst::FCMP_UGE: Out << "UGE"; break;
case FCmpInst::FCMP_TRUE: Out << "TRUE"; break;
default: error("Invalid FCmp Predicate");
}
break;
case Instruction::Shl: Out << "getShl("; break;
case Instruction::LShr: Out << "getLShr("; break;
case Instruction::AShr: Out << "getAShr("; break;
case Instruction::Select: Out << "getSelect("; break;
case Instruction::ExtractElement: Out << "getExtractElement("; break;
case Instruction::InsertElement: Out << "getInsertElement("; break;
case Instruction::ShuffleVector: Out << "getShuffleVector("; break;
default:
error("Invalid constant expression");
break;
}
Out << getCppName(CE->getOperand(0));
for (unsigned i = 1; i < CE->getNumOperands(); ++i)
Out << ", " << getCppName(CE->getOperand(i));
Out << ");";
}
} else if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) {
Out << "Constant* " << constName << " = ";
Out << "BlockAddress::get(" << getOpName(BA->getBasicBlock()) << ");";
} else {
error("Bad Constant");
Out << "Constant* " << constName << " = 0; ";
}
nl(Out);
}
void CppWriter::printConstants(const Module* M) {
// Traverse all the global variables looking for constant initializers
for (Module::const_global_iterator I = TheModule->global_begin(),
E = TheModule->global_end(); I != E; ++I)
if (I->hasInitializer())
printConstant(I->getInitializer());
// Traverse the LLVM functions looking for constants
for (Module::const_iterator FI = TheModule->begin(), FE = TheModule->end();
FI != FE; ++FI) {
// Add all of the basic blocks and instructions
for (Function::const_iterator BB = FI->begin(),
E = FI->end(); BB != E; ++BB) {
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E;
++I) {
for (unsigned i = 0; i < I->getNumOperands(); ++i) {
if (Constant* C = dyn_cast<Constant>(I->getOperand(i))) {
printConstant(C);
}
}
}
}
}
}
void CppWriter::printVariableUses(const GlobalVariable *GV) {
}
void CppWriter::printVariableHead(const GlobalVariable *GV) {
Out << "var ";
printCppName(GV);
Out << ";\n";
}
void CppWriter::printVariableBody(const GlobalVariable *GV) {
if (GV->hasInitializer()) {
printCppName(GV);
Out << " = ";
Out << getCppName(GV->getInitializer()) << ";";
nl(Out);
}
}
std::string CppWriter::getOpName(const Value* V) {
if (!isa<Instruction>(V) || DefinedValues.find(V) != DefinedValues.end())
return getCppName(V);
// See if its alread in the map of forward references, if so just return the
// name we already set up for it
ForwardRefMap::const_iterator I = ForwardRefs.find(V);
if (I != ForwardRefs.end())
return I->second;
// This is a new forward reference. Generate a unique name for it
std::string result(std::string("fwdref_") + utostr(uniqueNum++));
// Yes, this is a hack. An Argument is the smallest instantiable value that
// we can make as a placeholder for the real value. We'll replace these
// Argument instances later.
Out << "Argument* " << result << " = new Argument("
<< getCppName(V->getType()) << ");";
nl(Out);
ForwardRefs[V] = result;
return result;
}
static StringRef ConvertAtomicOrdering(AtomicOrdering Ordering) {
switch (Ordering) {
case NotAtomic: return "NotAtomic";
case Unordered: return "Unordered";
case Monotonic: return "Monotonic";
case Acquire: return "Acquire";
case Release: return "Release";
case AcquireRelease: return "AcquireRelease";
case SequentiallyConsistent: return "SequentiallyConsistent";
}
llvm_unreachable("Unknown ordering");
}
static StringRef ConvertAtomicSynchScope(SynchronizationScope SynchScope) {
switch (SynchScope) {
case SingleThread: return "SingleThread";
case CrossThread: return "CrossThread";
}
llvm_unreachable("Unknown synch scope");
}
// generateInstruction - This member is called for each Instruction in a function.
std::string CppWriter::generateInstruction(const Instruction *I) {
std::string text = "UNKNOWN_INSTRUCTION";
std::string bbname = "NO_BBNAME";
std::string iName(getCppName(I));
// Before we emit this instruction, we need to take care of generating any
// forward references. So, we get the names of all the operands in advance
const unsigned Ops(I->getNumOperands());
std::string* opNames = new std::string[Ops];
for (unsigned i = 0; i < Ops; i++)
opNames[i] = getOpName(I->getOperand(i));
switch (I->getOpcode()) {
default:
error("Invalid instruction");
break;
case Instruction::Ret: {
const ReturnInst* ret = cast<ReturnInst>(I);
text = std::string("return") + (ret->getReturnValue() ? " " + opNames[0] : "") + ";";
break;
}
case Instruction::Br: {
const BranchInst* br = cast<BranchInst>(I);
Out << "BranchInst::Create(" ;
if (br->getNumOperands() == 3) {
Out << opNames[2] << ", "
<< opNames[1] << ", "
<< opNames[0] << ", ";
} else if (br->getNumOperands() == 1) {
Out << opNames[0] << ", ";
} else {
error("Branch with 2 operands?");
}
Out << bbname << ");";
break;
}
case Instruction::Switch: {
const SwitchInst *SI = cast<SwitchInst>(I);
Out << "SwitchInst* " << iName << " = SwitchInst::Create("
<< getOpName(SI->getCondition()) << ", "
<< getOpName(SI->getDefaultDest()) << ", "
<< SI->getNumCases() << ", " << bbname << ");";
nl(Out);
for (SwitchInst::ConstCaseIt i = SI->case_begin(), e = SI->case_end();
i != e; ++i) {
const IntegersSubset CaseVal = i.getCaseValueEx();
const BasicBlock *BB = i.getCaseSuccessor();
Out << iName << "->addCase("
<< getOpName(CaseVal) << ", "
<< getOpName(BB) << ");";
nl(Out);
}
break;
}
case Instruction::IndirectBr: {
const IndirectBrInst *IBI = cast<IndirectBrInst>(I);
Out << "IndirectBrInst *" << iName << " = IndirectBrInst::Create("
<< opNames[0] << ", " << IBI->getNumDestinations() << ");";
nl(Out);
for (unsigned i = 1; i != IBI->getNumOperands(); ++i) {
Out << iName << "->addDestination(" << opNames[i] << ");";
nl(Out);
}
break;
}
case Instruction::Resume: {
Out << "ResumeInst::Create(mod->getContext(), " << opNames[0]
<< ", " << bbname << ");";
break;
}
case Instruction::Invoke: {
const InvokeInst* inv = cast<InvokeInst>(I);
Out << "std::vector<Value*> " << iName << "_params;";
nl(Out);
for (unsigned i = 0; i < inv->getNumArgOperands(); ++i) {
Out << iName << "_params.push_back("
<< getOpName(inv->getArgOperand(i)) << ");";
nl(Out);
}
// FIXME: This shouldn't use magic numbers -3, -2, and -1.
Out << "InvokeInst *" << iName << " = InvokeInst::Create("
<< getOpName(inv->getCalledFunction()) << ", "
<< getOpName(inv->getNormalDest()) << ", "
<< getOpName(inv->getUnwindDest()) << ", "
<< iName << "_params, \"";
printEscapedString(inv->getName());
Out << "\", " << bbname << ");";
nl(Out) << iName << "->setCallingConv(";
printCallingConv(inv->getCallingConv());
Out << ");";
printAttributes(inv->getAttributes(), iName);
Out << iName << "->setAttributes(" << iName << "_PAL);";
nl(Out);
break;
}
case Instruction::Unreachable: {
Out << "new UnreachableInst("
<< "mod->getContext(), "
<< bbname << ");";
break;
}
case Instruction::Add:
case Instruction::FAdd:
case Instruction::Sub:
case Instruction::FSub:
case Instruction::Mul:
case Instruction::FMul:
case Instruction::UDiv:
case Instruction::SDiv:
case Instruction::FDiv:
case Instruction::URem:
case Instruction::SRem:
case Instruction::FRem:
case Instruction::And:
case Instruction::Or:
case Instruction::Xor:
case Instruction::Shl:
case Instruction::LShr:
case Instruction::AShr:{
Out << "BinaryOperator* " << iName << " = BinaryOperator::Create(";
switch (I->getOpcode()) {
case Instruction::Add: Out << "Instruction::Add"; break;
case Instruction::FAdd: Out << "Instruction::FAdd"; break;
case Instruction::Sub: Out << "Instruction::Sub"; break;
case Instruction::FSub: Out << "Instruction::FSub"; break;
case Instruction::Mul: Out << "Instruction::Mul"; break;
case Instruction::FMul: Out << "Instruction::FMul"; break;
case Instruction::UDiv:Out << "Instruction::UDiv"; break;
case Instruction::SDiv:Out << "Instruction::SDiv"; break;
case Instruction::FDiv:Out << "Instruction::FDiv"; break;
case Instruction::URem:Out << "Instruction::URem"; break;
case Instruction::SRem:Out << "Instruction::SRem"; break;
case Instruction::FRem:Out << "Instruction::FRem"; break;
case Instruction::And: Out << "Instruction::And"; break;
case Instruction::Or: Out << "Instruction::Or"; break;
case Instruction::Xor: Out << "Instruction::Xor"; break;
case Instruction::Shl: Out << "Instruction::Shl"; break;
case Instruction::LShr:Out << "Instruction::LShr"; break;
case Instruction::AShr:Out << "Instruction::AShr"; break;
default: Out << "Instruction::BadOpCode"; break;
}
Out << ", " << opNames[0] << ", " << opNames[1] << ", \"";
printEscapedString(I->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::FCmp: {
Out << "FCmpInst* " << iName << " = new FCmpInst(*" << bbname << ", ";
switch (cast<FCmpInst>(I)->getPredicate()) {
case FCmpInst::FCMP_FALSE: Out << "FCmpInst::FCMP_FALSE"; break;
case FCmpInst::FCMP_OEQ : Out << "FCmpInst::FCMP_OEQ"; break;
case FCmpInst::FCMP_OGT : Out << "FCmpInst::FCMP_OGT"; break;
case FCmpInst::FCMP_OGE : Out << "FCmpInst::FCMP_OGE"; break;
case FCmpInst::FCMP_OLT : Out << "FCmpInst::FCMP_OLT"; break;
case FCmpInst::FCMP_OLE : Out << "FCmpInst::FCMP_OLE"; break;
case FCmpInst::FCMP_ONE : Out << "FCmpInst::FCMP_ONE"; break;
case FCmpInst::FCMP_ORD : Out << "FCmpInst::FCMP_ORD"; break;
case FCmpInst::FCMP_UNO : Out << "FCmpInst::FCMP_UNO"; break;
case FCmpInst::FCMP_UEQ : Out << "FCmpInst::FCMP_UEQ"; break;
case FCmpInst::FCMP_UGT : Out << "FCmpInst::FCMP_UGT"; break;
case FCmpInst::FCMP_UGE : Out << "FCmpInst::FCMP_UGE"; break;
case FCmpInst::FCMP_ULT : Out << "FCmpInst::FCMP_ULT"; break;
case FCmpInst::FCMP_ULE : Out << "FCmpInst::FCMP_ULE"; break;
case FCmpInst::FCMP_UNE : Out << "FCmpInst::FCMP_UNE"; break;
case FCmpInst::FCMP_TRUE : Out << "FCmpInst::FCMP_TRUE"; break;
default: Out << "FCmpInst::BAD_ICMP_PREDICATE"; break;
}
Out << ", " << opNames[0] << ", " << opNames[1] << ", \"";
printEscapedString(I->getName());
Out << "\");";
break;
}
case Instruction::ICmp: {
Out << "ICmpInst* " << iName << " = new ICmpInst(*" << bbname << ", ";
switch (cast<ICmpInst>(I)->getPredicate()) {
case ICmpInst::ICMP_EQ: Out << "ICmpInst::ICMP_EQ"; break;
case ICmpInst::ICMP_NE: Out << "ICmpInst::ICMP_NE"; break;
case ICmpInst::ICMP_ULE: Out << "ICmpInst::ICMP_ULE"; break;
case ICmpInst::ICMP_SLE: Out << "ICmpInst::ICMP_SLE"; break;
case ICmpInst::ICMP_UGE: Out << "ICmpInst::ICMP_UGE"; break;
case ICmpInst::ICMP_SGE: Out << "ICmpInst::ICMP_SGE"; break;
case ICmpInst::ICMP_ULT: Out << "ICmpInst::ICMP_ULT"; break;
case ICmpInst::ICMP_SLT: Out << "ICmpInst::ICMP_SLT"; break;
case ICmpInst::ICMP_UGT: Out << "ICmpInst::ICMP_UGT"; break;
case ICmpInst::ICMP_SGT: Out << "ICmpInst::ICMP_SGT"; break;
default: Out << "ICmpInst::BAD_ICMP_PREDICATE"; break;
}
Out << ", " << opNames[0] << ", " << opNames[1] << ", \"";
printEscapedString(I->getName());
Out << "\");";
break;
}
case Instruction::Alloca: {
const AllocaInst* allocaI = cast<AllocaInst>(I);
text = iName + " = STACKTOP; STACKTOP += " + Twine(stackAlign(allocaI->getAllocatedType()->getScalarSizeInBits()/8)).str() + ";";
break;
}
case Instruction::Load: {
const LoadInst* load = cast<LoadInst>(I);
Out << "LoadInst* " << iName << " = new LoadInst("
<< opNames[0] << ", \"";
printEscapedString(load->getName());
Out << "\", " << (load->isVolatile() ? "true" : "false" )
<< ", " << bbname << ");";
if (load->getAlignment())
nl(Out) << iName << "->setAlignment("
<< load->getAlignment() << ");";
if (load->isAtomic()) {
StringRef Ordering = ConvertAtomicOrdering(load->getOrdering());
StringRef CrossThread = ConvertAtomicSynchScope(load->getSynchScope());
nl(Out) << iName << "->setAtomic("
<< Ordering << ", " << CrossThread << ");";
}
break;
}
case Instruction::Store: {
text = "HEAP32[" + opNames[1] + ">>2] = " + opNames[0] + ";";
break;
}
case Instruction::GetElementPtr: {
const GetElementPtrInst* gep = cast<GetElementPtrInst>(I);
if (gep->getNumOperands() <= 2) {
Out << "GetElementPtrInst* " << iName << " = GetElementPtrInst::Create("
<< opNames[0];
if (gep->getNumOperands() == 2)
Out << ", " << opNames[1];
} else {
Out << "std::vector<Value*> " << iName << "_indices;";
nl(Out);
for (unsigned i = 1; i < gep->getNumOperands(); ++i ) {
Out << iName << "_indices.push_back("
<< opNames[i] << ");";
nl(Out);
}
Out << "Instruction* " << iName << " = GetElementPtrInst::Create("
<< opNames[0] << ", " << iName << "_indices";
}
Out << ", \"";
printEscapedString(gep->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::PHI: {
const PHINode* phi = cast<PHINode>(I);
Out << "PHINode* " << iName << " = PHINode::Create("
<< getCppName(phi->getType()) << ", "
<< phi->getNumIncomingValues() << ", \"";
printEscapedString(phi->getName());
Out << "\", " << bbname << ");";
nl(Out);
for (unsigned i = 0; i < phi->getNumIncomingValues(); ++i) {
Out << iName << "->addIncoming("
<< opNames[PHINode::getOperandNumForIncomingValue(i)] << ", "
<< getOpName(phi->getIncomingBlock(i)) << ");";
nl(Out);
}
break;
}
case Instruction::Trunc:
case Instruction::ZExt:
case Instruction::SExt:
case Instruction::FPTrunc:
case Instruction::FPExt:
case Instruction::FPToUI:
case Instruction::FPToSI:
case Instruction::UIToFP:
case Instruction::SIToFP:
case Instruction::PtrToInt:
case Instruction::IntToPtr:
case Instruction::BitCast: {
const CastInst* cst = cast<CastInst>(I);
Out << "CastInst* " << iName << " = new ";
switch (I->getOpcode()) {
case Instruction::Trunc: Out << "TruncInst"; break;
case Instruction::ZExt: Out << "ZExtInst"; break;
case Instruction::SExt: Out << "SExtInst"; break;
case Instruction::FPTrunc: Out << "FPTruncInst"; break;
case Instruction::FPExt: Out << "FPExtInst"; break;
case Instruction::FPToUI: Out << "FPToUIInst"; break;
case Instruction::FPToSI: Out << "FPToSIInst"; break;
case Instruction::UIToFP: Out << "UIToFPInst"; break;
case Instruction::SIToFP: Out << "SIToFPInst"; break;
case Instruction::PtrToInt: Out << "PtrToIntInst"; break;
case Instruction::IntToPtr: Out << "IntToPtrInst"; break;
case Instruction::BitCast: Out << "BitCastInst"; break;
default: llvm_unreachable("Unreachable");
}
Out << "(" << opNames[0] << ", "
<< getCppName(cst->getType()) << ", \"";
printEscapedString(cst->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::Call: {
const CallInst* call = cast<CallInst>(I);
text = std::string(call->getName().data()) + " = " + opNames[call->getNumArgOperands()] + "(" + opNames[0] + ");";
break;
}
case Instruction::Select: {
const SelectInst* sel = cast<SelectInst>(I);
Out << "SelectInst* " << getCppName(sel) << " = SelectInst::Create(";
Out << opNames[0] << ", " << opNames[1] << ", " << opNames[2] << ", \"";
printEscapedString(sel->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::UserOp1:
/// FALL THROUGH
case Instruction::UserOp2: {
/// FIXME: What should be done here?
break;
}
case Instruction::VAArg: {
const VAArgInst* va = cast<VAArgInst>(I);
Out << "VAArgInst* " << getCppName(va) << " = new VAArgInst("
<< opNames[0] << ", " << getCppName(va->getType()) << ", \"";
printEscapedString(va->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::ExtractElement: {
const ExtractElementInst* eei = cast<ExtractElementInst>(I);
Out << "ExtractElementInst* " << getCppName(eei)
<< " = new ExtractElementInst(" << opNames[0]
<< ", " << opNames[1] << ", \"";
printEscapedString(eei->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::InsertElement: {
const InsertElementInst* iei = cast<InsertElementInst>(I);
Out << "InsertElementInst* " << getCppName(iei)
<< " = InsertElementInst::Create(" << opNames[0]
<< ", " << opNames[1] << ", " << opNames[2] << ", \"";
printEscapedString(iei->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::ShuffleVector: {
const ShuffleVectorInst* svi = cast<ShuffleVectorInst>(I);
Out << "ShuffleVectorInst* " << getCppName(svi)
<< " = new ShuffleVectorInst(" << opNames[0]
<< ", " << opNames[1] << ", " << opNames[2] << ", \"";
printEscapedString(svi->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::ExtractValue: {
const ExtractValueInst *evi = cast<ExtractValueInst>(I);
Out << "std::vector<unsigned> " << iName << "_indices;";
nl(Out);
for (unsigned i = 0; i < evi->getNumIndices(); ++i) {
Out << iName << "_indices.push_back("
<< evi->idx_begin()[i] << ");";
nl(Out);
}
Out << "ExtractValueInst* " << getCppName(evi)
<< " = ExtractValueInst::Create(" << opNames[0]
<< ", "
<< iName << "_indices, \"";
printEscapedString(evi->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::InsertValue: {
const InsertValueInst *ivi = cast<InsertValueInst>(I);
Out << "std::vector<unsigned> " << iName << "_indices;";
nl(Out);
for (unsigned i = 0; i < ivi->getNumIndices(); ++i) {
Out << iName << "_indices.push_back("
<< ivi->idx_begin()[i] << ");";
nl(Out);
}
Out << "InsertValueInst* " << getCppName(ivi)
<< " = InsertValueInst::Create(" << opNames[0]
<< ", " << opNames[1] << ", "
<< iName << "_indices, \"";
printEscapedString(ivi->getName());
Out << "\", " << bbname << ");";
break;
}
case Instruction::Fence: {
const FenceInst *fi = cast<FenceInst>(I);
StringRef Ordering = ConvertAtomicOrdering(fi->getOrdering());
StringRef CrossThread = ConvertAtomicSynchScope(fi->getSynchScope());
Out << "FenceInst* " << iName
<< " = new FenceInst(mod->getContext(), "
<< Ordering << ", " << CrossThread << ", " << bbname
<< ");";
break;
}
case Instruction::AtomicCmpXchg: {
const AtomicCmpXchgInst *cxi = cast<AtomicCmpXchgInst>(I);
StringRef Ordering = ConvertAtomicOrdering(cxi->getOrdering());
StringRef CrossThread = ConvertAtomicSynchScope(cxi->getSynchScope());
Out << "AtomicCmpXchgInst* " << iName
<< " = new AtomicCmpXchgInst("
<< opNames[0] << ", " << opNames[1] << ", " << opNames[2] << ", "
<< Ordering << ", " << CrossThread << ", " << bbname
<< ");";
nl(Out) << iName << "->setName(\"";
printEscapedString(cxi->getName());
Out << "\");";
break;
}
case Instruction::AtomicRMW: {
const AtomicRMWInst *rmwi = cast<AtomicRMWInst>(I);
StringRef Ordering = ConvertAtomicOrdering(rmwi->getOrdering());
StringRef CrossThread = ConvertAtomicSynchScope(rmwi->getSynchScope());
StringRef Operation;
switch (rmwi->getOperation()) {
case AtomicRMWInst::Xchg: Operation = "AtomicRMWInst::Xchg"; break;
case AtomicRMWInst::Add: Operation = "AtomicRMWInst::Add"; break;
case AtomicRMWInst::Sub: Operation = "AtomicRMWInst::Sub"; break;
case AtomicRMWInst::And: Operation = "AtomicRMWInst::And"; break;
case AtomicRMWInst::Nand: Operation = "AtomicRMWInst::Nand"; break;
case AtomicRMWInst::Or: Operation = "AtomicRMWInst::Or"; break;
case AtomicRMWInst::Xor: Operation = "AtomicRMWInst::Xor"; break;
case AtomicRMWInst::Max: Operation = "AtomicRMWInst::Max"; break;
case AtomicRMWInst::Min: Operation = "AtomicRMWInst::Min"; break;
case AtomicRMWInst::UMax: Operation = "AtomicRMWInst::UMax"; break;
case AtomicRMWInst::UMin: Operation = "AtomicRMWInst::UMin"; break;
case AtomicRMWInst::BAD_BINOP: llvm_unreachable("Bad atomic operation");
}
Out << "AtomicRMWInst* " << iName
<< " = new AtomicRMWInst("
<< Operation << ", "
<< opNames[0] << ", " << opNames[1] << ", "
<< Ordering << ", " << CrossThread << ", " << bbname
<< ");";
nl(Out) << iName << "->setName(\"";
printEscapedString(rmwi->getName());
Out << "\");";
break;
}
}
DefinedValues.insert(I);
nl(Out);
delete [] opNames;
return text;
}
// Print out the types, constants and declarations needed by one function
void CppWriter::printFunctionUses(const Function* F) {
nl(Out) << "// Type Definitions"; nl(Out);
if (!is_inline) {
// Print the function's return type
printType(F->getReturnType());
// Print the function's function type
printType(F->getFunctionType());
// Print the types of each of the function's arguments
for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
AI != AE; ++AI) {
printType(AI->getType());
}
}
// Print type definitions for every type referenced by an instruction and
// make a note of any global values or constants that are referenced
SmallPtrSet<GlobalValue*,64> gvs;
SmallPtrSet<Constant*,64> consts;
for (Function::const_iterator BB = F->begin(), BE = F->end();
BB != BE; ++BB){
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
I != E; ++I) {
// Print the type of the instruction itself
printType(I->getType());
// Print the type of each of the instruction's operands
for (unsigned i = 0; i < I->getNumOperands(); ++i) {
Value* operand = I->getOperand(i);
printType(operand->getType());
// If the operand references a GVal or Constant, make a note of it
if (GlobalValue* GV = dyn_cast<GlobalValue>(operand)) {
gvs.insert(GV);
if (GenerationType != GenFunction)
if (GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
if (GVar->hasInitializer())
consts.insert(GVar->getInitializer());
} else if (Constant* C = dyn_cast<Constant>(operand)) {
consts.insert(C);
for (unsigned j = 0; j < C->getNumOperands(); ++j) {
// If the operand references a GVal or Constant, make a note of it
Value* operand = C->getOperand(j);
printType(operand->getType());
if (GlobalValue* GV = dyn_cast<GlobalValue>(operand)) {
gvs.insert(GV);
if (GenerationType != GenFunction)
if (GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
if (GVar->hasInitializer())
consts.insert(GVar->getInitializer());
}
}
}
}
}
}
// Print the function declarations for any functions encountered
nl(Out) << "// Function Declarations"; nl(Out);
for (SmallPtrSet<GlobalValue*,64>::iterator I = gvs.begin(), E = gvs.end();
I != E; ++I) {
if (Function* Fun = dyn_cast<Function>(*I)) {
if (!is_inline || Fun != F)
printFunctionHead(Fun);
}
}
// Print the global variable declarations for any variables encountered
nl(Out) << "// Global Variable Declarations"; nl(Out);
for (SmallPtrSet<GlobalValue*,64>::iterator I = gvs.begin(), E = gvs.end();
I != E; ++I) {
if (GlobalVariable* F = dyn_cast<GlobalVariable>(*I))
printVariableHead(F);
}
// Print the constants found
nl(Out) << "// Constant Definitions"; nl(Out);
for (SmallPtrSet<Constant*,64>::iterator I = consts.begin(),
E = consts.end(); I != E; ++I) {
printConstant(*I);
}
// Process the global variables definitions now that all the constants have
// been emitted. These definitions just couple the gvars with their constant
// initializers.
if (GenerationType != GenFunction) {
nl(Out) << "// Global Variable Definitions"; nl(Out);
for (SmallPtrSet<GlobalValue*,64>::iterator I = gvs.begin(), E = gvs.end();
I != E; ++I) {
if (GlobalVariable* GV = dyn_cast<GlobalVariable>(*I))
printVariableBody(GV);
}
}
}
void CppWriter::printFunctionHead(const Function* F) {
nl(Out) << "Function* " << getCppName(F);
Out << " = mod->getFunction(\"";
printEscapedString(F->getName());
Out << "\");";
nl(Out) << "if (!" << getCppName(F) << ") {";
nl(Out) << getCppName(F);
Out<< " = Function::Create(";
nl(Out,1) << "/*Type=*/" << getCppName(F->getFunctionType()) << ",";
nl(Out) << "/*Linkage=*/";
printLinkageType(F->getLinkage());
Out << ",";
nl(Out) << "/*Name=*/\"";
printEscapedString(F->getName());
Out << "\", mod); " << (F->isDeclaration()? "// (external, no body)" : "");
nl(Out,-1);
printCppName(F);
Out << "->setCallingConv(";
printCallingConv(F->getCallingConv());
Out << ");";
nl(Out);
if (F->hasSection()) {
printCppName(F);
Out << "->setSection(\"" << F->getSection() << "\");";
nl(Out);
}
if (F->getAlignment()) {
printCppName(F);
Out << "->setAlignment(" << F->getAlignment() << ");";
nl(Out);
}
if (F->getVisibility() != GlobalValue::DefaultVisibility) {
printCppName(F);
Out << "->setVisibility(";
printVisibilityType(F->getVisibility());
Out << ");";
nl(Out);
}
if (F->hasGC()) {
printCppName(F);
Out << "->setGC(\"" << F->getGC() << "\");";
nl(Out);
}
Out << "}";
nl(Out);
printAttributes(F->getAttributes(), getCppName(F));
printCppName(F);
Out << "->setAttributes(" << getCppName(F) << "_PAL);";
nl(Out);
}
void CppWriter::printFunctionBody(const Function *F) {
if (F->isDeclaration())
return; // external functions have no bodies.
// Clear the DefinedValues and ForwardRefs maps because we can't have
// cross-function forward refs
ForwardRefs.clear();
DefinedValues.clear();
// Create all the argument values
if (!is_inline) {
if (!F->arg_empty()) {
Out << "Function::arg_iterator args = " << getCppName(F)
<< "->arg_begin();";
nl(Out);
}
for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
AI != AE; ++AI) {
Out << "Value* " << getCppName(AI) << " = args++;";
nl(Out);
if (AI->hasName()) {
Out << getCppName(AI) << "->setName(\"";
printEscapedString(AI->getName());
Out << "\");";
nl(Out);
}
}
}
// Prepare relooper
static char *buffer = new char[10*1024*1024]; // XXX
Relooper::SetOutputBuffer(buffer);
Relooper R;
Block *Entry = NULL;
std::map<const BasicBlock*, Block*> LLVMToRelooper;
// Create relooper blocks with their contents
for (Function::const_iterator BI = F->begin(), BE = F->end();
BI != BE; ++BI) {
std::string contents = "";
for (BasicBlock::const_iterator I = BI->begin(), E = BI->end();
I != E; ++I) {
contents += generateInstruction(I) + "\n";
}
Block *Curr = new Block(contents.c_str());
const BasicBlock *BB = &*BI;
LLVMToRelooper[BB] = Curr;
R.AddBlock(Curr);
if (!Entry) Entry = Curr;
}
// Create branchings
for (Function::const_iterator BI = F->begin(), BE = F->end();
BI != BE; ++BI) {
for (BasicBlock::const_iterator I = BI->begin(), E = BI->end();
I != E; ++I) {
// if I is a branch, do something XXX
}
}
// Calculate relooping and print
R.Calculate(Entry);
R.Render();
Out << buffer;
// Loop over the ForwardRefs and resolve them now that all instructions
// are generated.
if (!ForwardRefs.empty()) {
nl(Out) << "// Resolve Forward References";
nl(Out);
}
while (!ForwardRefs.empty()) {
ForwardRefMap::iterator I = ForwardRefs.begin();
Out << I->second << "->replaceAllUsesWith("
<< getCppName(I->first) << "); delete " << I->second << ";";
nl(Out);
ForwardRefs.erase(I);
}
}
void CppWriter::printInline(const std::string& fname,
const std::string& func) {
const Function* F = TheModule->getFunction(func);
if (!F) {
error(std::string("Function '") + func + "' not found in input module");
return;
}
if (F->isDeclaration()) {
error(std::string("Function '") + func + "' is external!");
return;
}
nl(Out) << "BasicBlock* " << fname << "(Module* mod, Function *"
<< getCppName(F);
unsigned arg_count = 1;
for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
AI != AE; ++AI) {
Out << ", Value* arg_" << arg_count;
}
Out << ") {";
nl(Out);
is_inline = true;
printFunctionUses(F);
printFunctionBody(F);
is_inline = false;
Out << "return " << getCppName(F->begin()) << ";";
nl(Out) << "}";
nl(Out);
}
void CppWriter::printModuleBody() {
// Process the global variables declarations. We can't initialze them until
// after the constants are printed so just print a header for each global
nl(Out) << "// Global Variable Declarations\n"; nl(Out);
for (Module::const_global_iterator I = TheModule->global_begin(),
E = TheModule->global_end(); I != E; ++I) {
printVariableHead(I);
}
// Print out all the constants definitions. Constants don't recurse except
// through GlobalValues. All GlobalValues have been declared at this point
// so we can proceed to generate the constants.
nl(Out) << "// Constant Definitions"; nl(Out);
printConstants(TheModule);
// Process the global variables definitions now that all the constants have
// been emitted. These definitions just couple the gvars with their constant
// initializers.
nl(Out) << "// Global Variable Definitions"; nl(Out);
for (Module::const_global_iterator I = TheModule->global_begin(),
E = TheModule->global_end(); I != E; ++I) {
printVariableBody(I);
}
// Finally, we can safely put out all of the function bodies.
nl(Out) << "// Function Definitions"; nl(Out);
for (Module::const_iterator I = TheModule->begin(), E = TheModule->end();
I != E; ++I) {
if (!I->isDeclaration()) {
Out << "function _" << I->getName() << "() {";
nl(Out,1);
printFunctionBody(I);
nl(Out,-1) << "}";
nl(Out);
}
}
}
void CppWriter::printProgram(const std::string& fname,
const std::string& mName) {
printModule(fname,mName);
}
void CppWriter::printModule(const std::string& fname,
const std::string& mName) {
printModuleBody();
}
void CppWriter::printContents(const std::string& fname,
const std::string& mName) {
Out << "\nModule* " << fname << "(Module *mod) {\n";
Out << "\nmod->setModuleIdentifier(\"";
printEscapedString(mName);
Out << "\");\n";
printModuleBody();
Out << "\nreturn mod;\n";
Out << "\n}\n";
}
void CppWriter::printFunction(const std::string& fname,
const std::string& funcName) {
const Function* F = TheModule->getFunction(funcName);
if (!F) {
error(std::string("Function '") + funcName + "' not found in input module");
return;
}
Out << "\nFunction* " << fname << "(Module *mod) {\n";
printFunctionUses(F);
printFunctionHead(F);
printFunctionBody(F);
Out << "return " << getCppName(F) << ";\n";
Out << "}\n";
}
void CppWriter::printFunctions() {
const Module::FunctionListType &funcs = TheModule->getFunctionList();
Module::const_iterator I = funcs.begin();
Module::const_iterator IE = funcs.end();
for (; I != IE; ++I) {
const Function &func = *I;
if (!func.isDeclaration()) {
std::string name("define_");
name += func.getName();
printFunction(name, func.getName());
}
}
}
void CppWriter::printVariable(const std::string& fname,
const std::string& varName) {
const GlobalVariable* GV = TheModule->getNamedGlobal(varName);
if (!GV) {
error(std::string("Variable '") + varName + "' not found in input module");
return;
}
Out << "\nGlobalVariable* " << fname << "(Module *mod) {\n";
printVariableUses(GV);
printVariableHead(GV);
printVariableBody(GV);
Out << "return " << getCppName(GV) << ";\n";
Out << "}\n";
}
void CppWriter::printType(const std::string &fname,
const std::string &typeName) {
Type* Ty = TheModule->getTypeByName(typeName);
if (!Ty) {
error(std::string("Type '") + typeName + "' not found in input module");
return;
}
Out << "\nType* " << fname << "(Module *mod) {\n";
printType(Ty);
Out << "return " << getCppName(Ty) << ";\n";
Out << "}\n";
}
bool CppWriter::runOnModule(Module &M) {
TheModule = &M;
// Emit a header
Out << "// Generated by llvm2js\n\n";
// Get the name of the function we're supposed to generate
std::string fname = FuncName.getValue();
// Get the name of the thing we are to generate
std::string tgtname = NameToGenerate.getValue();
if (GenerationType == GenModule ||
GenerationType == GenContents ||
GenerationType == GenProgram ||
GenerationType == GenFunctions) {
if (tgtname == "!bad!") {
if (M.getModuleIdentifier() == "-")
tgtname = "<stdin>";
else
tgtname = M.getModuleIdentifier();
}
} else if (tgtname == "!bad!")
error("You must use the -for option with -gen-{function,variable,type}");
switch (WhatToGenerate(GenerationType)) {
case GenProgram:
if (fname.empty())
fname = "makeLLVMModule";
printProgram(fname,tgtname);
break;
case GenModule:
if (fname.empty())
fname = "makeLLVMModule";
printModule(fname,tgtname);
break;
case GenContents:
if (fname.empty())
fname = "makeLLVMModuleContents";
printContents(fname,tgtname);
break;
case GenFunction:
if (fname.empty())
fname = "makeLLVMFunction";
printFunction(fname,tgtname);
break;
case GenFunctions:
printFunctions();
break;
case GenInline:
if (fname.empty())
fname = "makeLLVMInline";
printInline(fname,tgtname);
break;
case GenVariable:
if (fname.empty())
fname = "makeLLVMVariable";
printVariable(fname,tgtname);
break;
case GenType:
if (fname.empty())
fname = "makeLLVMType";
printType(fname,tgtname);
break;
}
return false;
}
char CppWriter::ID = 0;
//===----------------------------------------------------------------------===//
// External Interface declaration
//===----------------------------------------------------------------------===//
bool CPPTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
formatted_raw_ostream &o,
CodeGenFileType FileType,
bool DisableVerify,
AnalysisID StartAfter,
AnalysisID StopAfter) {
if (FileType != TargetMachine::CGFT_AssemblyFile) return true;
PM.add(new CppWriter(o));
return false;
}
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