llvmpy/newbinding/include/llvm_binding/extra.h

#include <Python.h>
#include <llvm/ADT/SmallVector.h>
#include <llvm/Value.h>
#include <llvm/DerivedTypes.h>
#include <llvm/Function.h>
#include <llvm/Support/raw_ostream.h>
#include <llvm/Support/FormattedStream.h>
#include <llvm/Support/MemoryBuffer.h>
#include <llvm/Bitcode/ReaderWriter.h>
#include <llvm/ExecutionEngine/ExecutionEngine.h>
#include <llvm/ExecutionEngine/GenericValue.h>
#include <llvm/Linker.h>
#include <llvm/Module.h>

#include "auto_pyobject.h"

namespace extra{
    using namespace llvm;
    
    class raw_svector_ostream_helper: public raw_svector_ostream {
        SmallVectorImpl<char> *SV;
    public:
        static
        raw_svector_ostream_helper* create()
        {
            SmallVectorImpl<char>* sv = new SmallVector<char, 16>();
            return new raw_svector_ostream_helper(sv);
        }

        ~raw_svector_ostream_helper()
        {
            delete SV;
        }

    protected:

        explicit
        raw_svector_ostream_helper(SmallVectorImpl<char>* sv)
        : raw_svector_ostream(*sv), SV(sv) {}

    private:
        // no copy
        raw_svector_ostream_helper(const raw_svector_ostream_helper&);
        // no assign
        void operator = (const raw_svector_ostream_helper&);
    };

}

static
PyObject* make_raw_ostream_for_printing(PyObject* self, PyObject* args)
{
    using extra::raw_svector_ostream_helper;
    using llvm::raw_svector_ostream;
    
    if (!PyArg_ParseTuple(args, "")) {
        return NULL;
    }
    raw_svector_ostream* RSOH = raw_svector_ostream_helper::create();
    return pycapsule_new(RSOH, "llvm::raw_ostream",
                         "llvm::raw_svector_ostream");
}

static
PyObject* make_small_vector_from_types(PyObject* self, PyObject* args)
{
    using llvm::Type;
    typedef llvm::SmallVector<llvm::Type*, 8> SmallVector_Type;
    
    SmallVector_Type* SV = new SmallVector_Type;
    Py_ssize_t size = PyTuple_Size(args);
    for (Py_ssize_t i = 0; i < size; ++i) {
        PyObject* cap = PyTuple_GetItem(args, i);
        if (!cap) {
            return NULL;
        }
        Type* type = (Type*)PyCapsule_GetPointer(cap, "llvm::Type");
        if (!type) {
            return NULL;
        }
        SV->push_back(type);
    }
    return pycapsule_new(SV, "llvm::SmallVector<llvm::Type*,8>");
}

static
PyObject* make_small_vector_from_values(PyObject* self, PyObject* args)
{
    using llvm::Value;
    typedef llvm::SmallVector<llvm::Value*, 8> SmallVector_Value;

    SmallVector_Value* SV = new SmallVector_Value;
    Py_ssize_t size = PyTuple_Size(args);
    for (Py_ssize_t i = 0; i < size; ++i) {
        PyObject* cap = PyTuple_GetItem(args, i);
        if (!cap) {
            return NULL;
        }
        Value* value = (Value*)PyCapsule_GetPointer(cap, "llvm::Value");
        if (!value) {
            return NULL;
        }
        SV->push_back(value);
    }
    return pycapsule_new(SV, "llvm::SmallVector<llvm::Value*,8>");
}


static
PyObject* make_small_vector_from_unsigned(PyObject* self, PyObject* args)
{
    using llvm::Value;
    typedef llvm::SmallVector<unsigned, 8> SmallVector_Unsigned;

    SmallVector_Unsigned* SV = new SmallVector_Unsigned;
    Py_ssize_t size = PyTuple_Size(args);
    for (Py_ssize_t i = 0; i < size; ++i) {
        PyObject* item = PyTuple_GetItem(args, i);
        if (!item) {
            return NULL;
        }
        unsigned value = PyLong_AsUnsignedLong(item);
        if (PyErr_Occurred()){
            return NULL;
        }
        SV->push_back(value);
    }
    return pycapsule_new(SV, "llvm::SmallVector<unsigned,8>");
}

static PyMethodDef extra_methodtable[] = {
    #define method(func) { #func, (PyCFunction)func, METH_VARARGS, NULL }
    method( make_raw_ostream_for_printing ),
    method( make_small_vector_from_types ),
    method( make_small_vector_from_values ),
    method( make_small_vector_from_unsigned ),
    #undef method
    { NULL }
};


////////////
template<class iterator>
PyObject* iterator_to_pylist_deref(iterator begin, iterator end,
                             const char *capsuleName, const char *className)
{
    PyObject* list = PyList_New(0);
    for(; begin != end; ++begin) {
        PyObject* cap = pycapsule_new(&*begin, capsuleName, className);
        PyList_Append(list, cap);
    }
    return list;
}

template<class iterator>
PyObject* iterator_to_pylist(iterator begin, iterator end,
                             const char *capsuleName, const char *className)
{
    PyObject* list = PyList_New(0);
    for(; begin != end; ++begin) {
        PyObject* cap = pycapsule_new(*begin, capsuleName, className);
        PyList_Append(list, cap);
    }
    return list;
}

template<class iplist>
PyObject* iplist_to_pylist(iplist &IPL, const char * capsuleName,
                           const char* className){
    return iterator_to_pylist_deref(IPL.begin(), IPL.end(), capsuleName,
                                    className);
}

//static
//bool string_equal(const char *A, const char *B){
//    for (; *A and *B; ++A, ++B) {
//        if (*A != *B) return false;
//    }
//    return true;
//}

////////////
static
PyObject* Value_use_iterator_to_list(llvm::Value* val)
{
    return iterator_to_pylist(val->use_begin(), val->use_end(),
                              "llvm::Value", "llvm::User");
}

static
PyObject* Function_getArgumentList(llvm::Function* fn)
{
    return iplist_to_pylist(fn->getArgumentList(), "llvm::Value",
                            "llvm::Argument");
}

static
PyObject* Function_getBasicBlockList(llvm::Function* fn)
{
    return iplist_to_pylist(fn->getBasicBlockList(), "llvm::Value",
                            "llvm::BasicBlock");
}

/*
 * errout --- can be any file object
 *
 */
static
llvm::ExecutionEngine* ExecutionEngine_create(
                  llvm::Module* M,
                  bool ForceInterpreter = false,
                  PyObject* errout = 0,
                  llvm::CodeGenOpt::Level OptLevel = llvm::CodeGenOpt::Default,
                  bool 	GVsWithCode = true)
{
    using namespace llvm;
    std::string ErrorStr;
    ExecutionEngine *ee = ExecutionEngine::create(M, ForceInterpreter,
                                                  &ErrorStr, OptLevel,
                                                  GVsWithCode);
    PyFile_WriteString(ErrorStr.c_str(), errout);
    return ee;
}

/*
 * errout --- can be any file object
 *
 */
static
llvm::ExecutionEngine* ExecutionEngine_createJIT(
                     llvm::Module* M,
                     PyObject* errout = 0,
                     llvm::JITMemoryManager* JMM = 0,
                     llvm::CodeGenOpt::Level OL = llvm::CodeGenOpt::Default,
                     bool GCsWithCode = true,
                     llvm::Reloc::Model RM = llvm::Reloc::Default,
                     llvm::CodeModel::Model CMM = llvm::CodeModel::JITDefault)
{
    using namespace llvm;
    std::string ErrorStr;
    ExecutionEngine *ee = ExecutionEngine::createJIT(M, &ErrorStr, JMM, OL,
                                                     GCsWithCode, RM, CMM);
    PyFile_WriteString(ErrorStr.c_str(), errout);
    return ee;
}

static
llvm::GenericValue* GenericValue_CreateInt(llvm::Type* Ty, unsigned long long N,
                                           bool IsSigned)
{
    // Shamelessly copied from LLVM
    llvm::GenericValue *GenVal = new llvm::GenericValue();
    GenVal->IntVal = llvm::APInt(Ty->getIntegerBitWidth(), N, IsSigned);
    return GenVal;
}

static
llvm::GenericValue* GenericValue_CreateFloat(float Val)
{
    llvm::GenericValue *GenVal = new llvm::GenericValue();
    GenVal->FloatVal = Val;
    return GenVal;
}

static
llvm::GenericValue* GenericValue_CreateDouble(double Val)
{
    llvm::GenericValue *GenVal = new llvm::GenericValue();
    GenVal->DoubleVal = Val;
    return GenVal;
}

static
llvm::GenericValue* GenericValue_CreatePointer(void * Ptr)
{
    llvm::GenericValue *GenVal = new llvm::GenericValue();
    GenVal->PointerVal = Ptr;
    return GenVal;
}

static
unsigned GenericValue_ValueIntWidth(llvm::GenericValue *GenValRef)
{
    return GenValRef->IntVal.getBitWidth();
}

static
unsigned long long GenericValue_ToUnsignedInt(llvm::GenericValue* GenVal)
{
    return GenVal->IntVal.getZExtValue();
}


static
long long GenericValue_ToSignedInt(llvm::GenericValue* GenVal)
{
    return GenVal->IntVal.getSExtValue();
}

static
void* GenericValue_ToPointer(llvm::GenericValue* GenVal)
{
    return GenVal->PointerVal;
}

static
double GenericValue_ToFloat(llvm::GenericValue* GenVal, llvm::Type* Ty)
{
    switch (Ty->getTypeID()) {
        case llvm::Type::FloatTyID:
            return GenVal->FloatVal;
        default:
            // Behavior undefined if type is not a float or a double
            return GenVal->DoubleVal;
    }
}

static
PyObject* ExecutionEngine_RunFunction(llvm::ExecutionEngine* EE,
                                      llvm::Function* Fn, PyObject* Args)
{
    using namespace llvm;
    const char * GVN = "llvm::GenericValue";
    if (!PyTuple_Check(Args)) {
        PyErr_SetString(PyExc_TypeError, "Expect a tuple of args.");
        return NULL;
    }
    std::vector<GenericValue> vec_args;
    Py_ssize_t nargs = PyTuple_Size(Args);
    vec_args.reserve(nargs);
    for (Py_ssize_t i = 0; i < nargs; ++i) {
        PyObject* obj = PyTuple_GetItem(Args, i);
        if (!obj) {
            PyErr_SetString(PyExc_RuntimeError, "Failed to index into args?");
            return NULL;
        }
        
        GenericValue* gv = static_cast<GenericValue*>(
                              PyCapsule_GetPointer(obj, GVN));

        if (!gv) {
            return NULL;
        }
        vec_args.push_back(*gv);
    }

    GenericValue ret = EE->runFunction(Fn, vec_args);
    return pycapsule_new(new GenericValue(ret), GVN);
}

static
PyObject* EngineBuilder_setErrorStr(llvm::EngineBuilder* eb, PyObject* fileobj)
{
    
    if (!PyFile_Check(fileobj)) {
        PyErr_SetString(PyExc_TypeError, "Expecting a file object.");
        return NULL;
    }

    std::string buffer;
    eb->setErrorStr(&buffer);

    if (-1 == PyFile_WriteString(buffer.c_str(), fileobj)) {
        return NULL;
    }

    return pycapsule_new(eb, "llvm::EngineBuilder");
}

static
PyObject* EngineBuilder_setMAttrs(llvm::EngineBuilder* eb,
                                  PyObject* strlist)
{
    if (!PyList_Check(strlist)) {
        PyErr_SetString(PyExc_TypeError, "Expecting a list of string.");
        return NULL;
    }
    std::vector<const char*> tmp;
    const Py_ssize_t N = PyList_Size(strlist);
    tmp.reserve(N);
    for (Py_ssize_t i = 0; i < N; ++i) {
        const char * elem = PyString_AsString(PyList_GetItem(strlist, i));
        if (!elem) {
            return NULL;
        }
        tmp.push_back(elem);
    }
    eb->setMAttrs(tmp);
    return pycapsule_new(eb, "llvm::EngineBuilder");
}

static
PyObject* EngineBuilder_selectTarget(llvm::EngineBuilder* eb,
                                     const llvm::Triple& TargetTriple,
                                     llvm::StringRef MArch,
                                     llvm::StringRef MCPU,
                                     PyObject* strlist)
{
    const Py_ssize_t N = PySequence_Size(strlist);
    llvm::SmallVector<std::string, 8> MAttrs;
    MAttrs.reserve(N);
    for (Py_ssize_t i = 0; i < N; ++i) {
        PyObject* str = PySequence_GetItem(strlist, i);
        const char * cp = PyString_AsString(str);
        if (!cp) {
            Py_DECREF(str);
            return NULL;
        }
        MAttrs.push_back(cp);
        Py_DECREF(str);
    }
    eb->selectTarget(TargetTriple, MArch, MCPU, MAttrs);
    return pycapsule_new(eb, "llvm::EngineBuilder");
}


static
PyObject* llvm_ParseBitCodeFile(llvm::StringRef Buf, llvm::LLVMContext& Ctx,
                                PyObject* FObj=NULL)
{
    using namespace llvm;
    MemoryBuffer* MB = MemoryBuffer::getMemBuffer(Buf);
    Module* M;
    if (FObj) {
        std::string ErrStr;
        M = ParseBitcodeFile(MB, Ctx, &ErrStr);
        if (-1 == PyFile_WriteString(ErrStr.c_str(), FObj)) {
            return NULL;
        }
    } else {
        M = ParseBitcodeFile(MB, Ctx);
    }
    delete MB;
    return pycapsule_new(M, "llvm::Module");
}


static
PyObject* llvm_WriteBitcodeToFile(const llvm::Module *M, PyObject* FObj)
{
    using namespace llvm;
    llvm::SmallVector<char, 32> sv;
    llvm::raw_svector_ostream rso(sv);
    llvm::WriteBitcodeToFile(M, rso);
    rso.flush();
    StringRef ref = rso.str();
    PyObject* buf = PyString_FromStringAndSize(ref.data(), ref.size());
    if (-1 == PyFile_WriteObject(buf, FObj, Py_PRINT_RAW)){
        return NULL;
    }
    Py_RETURN_NONE;
}

static
PyObject* llvm_getBitcodeTargetTriple(llvm::StringRef Buf,
                                      llvm::LLVMContext& Ctx,
                                      PyObject* FObj = NULL)
{
    using namespace llvm;
    MemoryBuffer* MB = MemoryBuffer::getMemBuffer(Buf);
    std::string Triple;
    if (FObj) {
        std::string ErrStr;
        Triple = getBitcodeTargetTriple(MB, Ctx, &ErrStr);
        if (-1 == PyFile_WriteString(ErrStr.c_str(), FObj)) {
            return NULL;
        }
    } else {
        Triple = getBitcodeTargetTriple(MB, Ctx);
    }
    delete MB;
    return PyString_FromString(Triple.c_str());
}

static
PyObject* TargetMachine_addPassesToEmitFile(
                                llvm::TargetMachine *TM,
                                llvm::PassManagerBase & PM,
                                PyObject* Out,
                                llvm::TargetMachine::CodeGenFileType FTy,
                                bool disableVerify=true)
{
    using namespace llvm;
    llvm::SmallVector<char, 32> sv;
    raw_svector_ostream rso(sv);
    formatted_raw_ostream fso(rso);
    fso.flush();
    bool status = TM->addPassesToEmitFile(PM, fso, FTy, disableVerify);
    if (status) {
        StringRef sr = rso.str();
        PyObject* buf = PyString_FromStringAndSize(sr.data(), sr.size());
        if (!buf) {
            return NULL;
        }
        if ( -1 == PyFile_WriteObject(buf, Out, Py_PRINT_RAW) ){
            return NULL;
        }
        Py_RETURN_TRUE;
    } else {
        Py_RETURN_FALSE;
    }
}

static
PyObject* Linker_LinkInModule(llvm::Linker* Linker,
                               llvm::Module* Mod,
                               PyObject* ErrMsg)
{
    std::string errmsg;
    bool failed = Linker->LinkInModule(Mod, &errmsg);
    if (not failed) {
        Py_RETURN_FALSE;
    } else {
        if (-1 == PyFile_WriteString(errmsg.c_str(), ErrMsg)) {
            return NULL;
        }
        Py_RETURN_TRUE;
    }
}

static
PyObject* Linker_LinkModules(llvm::Module* Dest,
                             llvm::Module* Src,
                             unsigned Mode,
                             PyObject* ErrMsg)
{
    std::string errmsg;
    bool failed = llvm::Linker::LinkModules(Dest, Src, Mode, &errmsg);
    if (not failed) {
        Py_RETURN_FALSE;
    } else {
        if (-1 == PyFile_WriteString(errmsg.c_str(), ErrMsg)) {
            return NULL;
        }
        Py_RETURN_TRUE;
    }
}

static
PyObject* StructType_setBody(llvm::StructType* Self,
                             PyObject* Elems,
                             bool isPacked=false)
{
    using namespace llvm;
    std::vector<Type*> elements;
    Py_ssize_t N = PySequence_Size(Elems);
    elements.reserve(N);
    for (Py_ssize_t i=0; i < N; ++i) {
        auto_pyobject obj = PySequence_GetItem(Elems, i);
        auto_pyobject capsule = PyObject_GetAttrString(*obj, "_ptr");
        if (!capsule) {
            return NULL;
        }
        void * ptr = PyCapsule_GetPointer(*capsule, "llvm::Type");
        if (!ptr) {
            return NULL;
        }
        Type* type = static_cast<Type*>(ptr);
        elements.push_back(type);
    }

    Self->setBody(elements, isPacked);

    Py_RETURN_NONE;
}

static
PyObject* Module_list_globals(llvm::Module* Mod)
{
    return iplist_to_pylist(Mod->getGlobalList(),
                            "llvm::Value", "llvm::GlobalVariable");
}

static
PyObject* Module_list_functions(llvm::Module* Mod)
{
    return iplist_to_pylist(Mod->getFunctionList(),
                            "llvm::Value", "llvm::Function");
}