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cgutils.cpp
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cgutils.cpp
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// This file is a part of Julia. License is MIT: http:https://julialang.org/license
// utility procedures used in code generation
#if defined(USE_MCJIT) && defined(_OS_WINDOWS_)
template<class T> // for GlobalObject's
static T* addComdat(T *G)
{
if (imaging_mode) {
Comdat *jl_Comdat = shadow_module->getOrInsertComdat(G->getName());
jl_Comdat->setSelectionKind(Comdat::NoDuplicates);
G->setComdat(jl_Comdat);
}
return G;
}
#else
template<class T>
static T* addComdat(T *G) { return G; }
#endif
static Value *tbaa_decorate(MDNode* md, Instruction* load_or_store)
{
load_or_store->setMetadata( llvm::LLVMContext::MD_tbaa, md );
return load_or_store;
}
// Fixing up references to other modules for MCJIT
static GlobalVariable *prepare_global(GlobalVariable *G)
{
#ifdef USE_MCJIT
if (G->getParent() != jl_Module) {
GlobalVariable *gv = jl_Module->getGlobalVariable(G->getName());
if (!gv) {
gv = new GlobalVariable(*jl_Module, G->getType()->getElementType(),
G->isConstant(), GlobalVariable::ExternalLinkage,
NULL, G->getName());
}
return gv;
}
#endif
return G;
}
static llvm::Value *prepare_call(llvm::Value* Callee)
{
#ifdef USE_MCJIT
llvm::Function *F = dyn_cast<Function>(Callee);
if (!F)
return Callee;
if (F->getParent() != jl_Module) {
Function *ModuleF = jl_Module->getFunction(F->getName());
if (ModuleF) {
return ModuleF;
}
else {
return Function::Create(F->getFunctionType(),
Function::ExternalLinkage,
F->getName(),
jl_Module);
}
}
#endif
return Callee;
}
#ifdef LLVM35
static inline void add_named_global(GlobalObject *gv, void *addr)
#else
static inline void add_named_global(GlobalValue *gv, void *addr)
#endif
{
#ifdef USE_MCJIT
addComdat(gv);
sys::DynamicLibrary::AddSymbol(gv->getName(),addr);
#else
jl_ExecutionEngine->addGlobalMapping(gv,addr);
#endif
}
// --- string constants ---
static std::map<const std::string, GlobalVariable*> stringConstants;
extern "C" {
extern int jl_in_inference;
}
static GlobalVariable *stringConst(const std::string &txt)
{
GlobalVariable *gv = stringConstants[txt];
static int strno = 0;
// in inference, we can not share string constants between
// modules as there might be multiple compiles on the stack
// with calls in between them.
if (gv == NULL || jl_in_inference) {
std::stringstream ssno;
std::string vname;
ssno << strno;
vname += "_j_str";
vname += ssno.str();
gv = new GlobalVariable(*jl_Module,
ArrayType::get(T_int8, txt.length()+1),
true,
imaging_mode ? GlobalVariable::PrivateLinkage : GlobalVariable::ExternalLinkage,
ConstantDataArray::get(getGlobalContext(),
ArrayRef<unsigned char>(
(const unsigned char*)txt.c_str(),
txt.length()+1)),
vname);
gv->setUnnamedAddr(true);
stringConstants[txt] = gv;
strno++;
}
return gv;
}
// --- Shadow module handling ---
typedef struct {Value* gv; int32_t index;} jl_value_llvm; // uses 1-based indexing
static std::map<void*, jl_value_llvm> jl_value_to_llvm;
static std::map<Value *, void*> llvm_to_jl_value;
#ifdef USE_MCJIT
class FunctionMover : public ValueMaterializer
{
public:
FunctionMover(llvm::Module *dest,llvm::Module *src) :
ValueMaterializer(), VMap(), destModule(dest), srcModule(src),
LazyFunctions(0)
{
}
ValueToValueMapTy VMap;
llvm::Module *destModule;
llvm::Module *srcModule;
std::vector<Function *> LazyFunctions;
Function *CloneFunctionProto(Function *F)
{
Function *NewF = Function::Create(F->getFunctionType(),
Function::ExternalLinkage,
F->getName(),
destModule);
LazyFunctions.push_back(F);
VMap[F] = (Value*)NewF;
return NewF;
}
void CloneFunctionBody(Function *F)
{
Function *NewF = (Function*)(Value*)VMap[F];
assert(NewF != NULL);
Function::arg_iterator DestI = NewF->arg_begin();
for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I) {
DestI->setName(I->getName()); // Copy the name over...
VMap[I] = DestI++; // Add mapping to VMap
}
#ifdef LLVM36
// Clone debug info - Not yet public API
// llvm::CloneDebugInfoMetadata(NewF,F,VMap);
#endif
SmallVector<ReturnInst*, 8> Returns;
llvm::CloneFunctionInto(NewF,F,VMap,true,Returns,"",NULL,NULL,this);
}
Function *CloneFunction(Function *F)
{
Function *NewF = (llvm::Function*)MapValue(F,VMap,RF_None,NULL,this);
ResolveLazyFunctions();
return NewF;
}
void ResolveLazyFunctions()
{
while (!LazyFunctions.empty()) {
Function *F = LazyFunctions.back();
LazyFunctions.pop_back();
CloneFunctionBody(F);
}
}
virtual Value *materializeValueFor (Value *V)
{
Function *F = dyn_cast<Function>(V);
if (F) {
if (F->isIntrinsic()) {
return destModule->getOrInsertFunction(F->getName(),F->getFunctionType());
}
if (F->isDeclaration() || F->getParent() != destModule) {
if (F->getName().empty())
return CloneFunctionProto(F);
Function *shadow = srcModule->getFunction(F->getName());
if (shadow != NULL && !shadow->isDeclaration()) {
// Not truly external
// Check whether we already emitted it once
uint64_t addr = jl_mcjmm->getSymbolAddress(F->getName());
if (addr == 0) {
Function *oldF = destModule->getFunction(F->getName());
if (oldF)
return oldF;
return CloneFunctionProto(F);
}
else {
return destModule->getOrInsertFunction(F->getName(),F->getFunctionType());
}
}
else if (!F->isDeclaration()) {
return CloneFunctionProto(F);
}
}
// Still a declaration and still in a different module
if (F->isDeclaration() && F->getParent() != destModule) {
// Create forward declaration in current module
return destModule->getOrInsertFunction(F->getName(),F->getFunctionType());
}
}
else if (isa<GlobalVariable>(V)) {
GlobalVariable *GV = cast<GlobalVariable>(V);
assert(GV != NULL);
GlobalVariable *oldGV = destModule->getGlobalVariable(GV->getName());
if (oldGV != NULL)
return oldGV;
GlobalVariable *newGV = new GlobalVariable(*destModule,
GV->getType()->getElementType(),
GV->isConstant(),
GlobalVariable::ExternalLinkage,
NULL,
GV->getName());
newGV->copyAttributesFrom(GV);
if (GV->isDeclaration())
return newGV;
if (!GV->getName().empty()) {
uint64_t addr = jl_ExecutionEngine->getGlobalValueAddress(GV->getName());
if (addr != 0) {
newGV->setExternallyInitialized(true);
return newGV;
}
}
std::map<Value*, void *>::iterator it;
it = llvm_to_jl_value.find(GV);
if (it != llvm_to_jl_value.end()) {
newGV->setInitializer(Constant::getIntegerValue(GV->getType()->getElementType(),APInt(sizeof(void*)*8,(ptrint_t)it->second)));
newGV->setConstant(true);
}
else if (GV->hasInitializer()) {
Value *C = MapValue(GV->getInitializer(),VMap,RF_None,NULL,this);
newGV->setInitializer(cast<Constant>(C));
}
return newGV;
}
return NULL;
};
};
#endif
#ifdef LLVM37
static DIType *julia_type_to_di(jl_value_t *jt, DIBuilder *dbuilder, bool isboxed = false)
#else
static DIType julia_type_to_di(jl_value_t *jt, DIBuilder *dbuilder, bool isboxed = false)
#endif
{
if (jl_is_abstracttype(jt) || !jl_is_datatype(jt) || !jl_isbits(jt) || isboxed)
return jl_pvalue_dillvmt;
jl_datatype_t *jdt = (jl_datatype_t*)jt;
if (jdt->ditype != NULL) {
#ifdef LLVM37
return (llvm::DIType*)jdt->ditype;
#else
return DIType((llvm::MDNode*)jdt->ditype);
#endif
}
if (jl_is_bitstype(jt)) {
#ifdef LLVM37
llvm::DIType *t = dbuilder->createBasicType(jdt->name->name->name,jdt->size,jdt->alignment,llvm::dwarf::DW_ATE_unsigned);
jdt->ditype = t;
return t;
#else
DIType t = dbuilder->createBasicType(jdt->name->name->name,jdt->size,jdt->alignment,llvm::dwarf::DW_ATE_unsigned);
MDNode *M = t;
jdt->ditype = M;
return t;
#endif
}
// TODO: Fixme
return jl_pvalue_dillvmt;
}
// --- emitting pointers directly into code ---
static Value *literal_static_pointer_val(void *p, Type *t)
{
// this function will emit a static pointer into the generated code
// the generated code will only be valid during the current session,
// and thus, this should typically be avoided in new API's
#if defined(_P64)
return ConstantExpr::getIntToPtr(ConstantInt::get(T_int64, (uint64_t)p), t);
#else
return ConstantExpr::getIntToPtr(ConstantInt::get(T_int32, (uint32_t)p), t);
#endif
}
static std::vector<Constant*> jl_sysimg_gvars;
extern "C" int32_t jl_get_llvm_gv(jl_value_t *p)
{
// map a jl_value_t memory location to a GlobalVariable
std::map<void*, jl_value_llvm>::iterator it;
it = jl_value_to_llvm.find(p);
if (it == jl_value_to_llvm.end())
return 0;
return it->second.index;
}
#ifdef HAVE_CPUID
extern "C" {
extern void jl_cpuid(int32_t CPUInfo[4], int32_t InfoType);
}
#endif
static void jl_gen_llvm_gv_array(llvm::Module *mod, SmallVector<GlobalVariable*, 8> &globalvars)
{
// emit the variable table into the code image. used just before dumping bitcode.
// afterwards, call eraseFromParent on everything in globalvars to reset code generator.
ArrayType *atype = ArrayType::get(T_psize,jl_sysimg_gvars.size());
globalvars.push_back(addComdat(new GlobalVariable(
*mod,
atype,
true,
GlobalVariable::ExternalLinkage,
ConstantArray::get(atype, ArrayRef<Constant*>(jl_sysimg_gvars)),
"jl_sysimg_gvars")));
globalvars.push_back(addComdat(new GlobalVariable(
*mod,
T_size,
true,
GlobalVariable::ExternalLinkage,
ConstantInt::get(T_size,globalUnique+1),
"jl_globalUnique")));
Constant *feature_string = ConstantDataArray::getString(jl_LLVMContext, jl_options.cpu_target);
globalvars.push_back(addComdat(new GlobalVariable(
*mod,
feature_string->getType(),
true,
GlobalVariable::ExternalLinkage,
feature_string,
"jl_sysimg_cpu_target")));
#ifdef HAVE_CPUID
// For native also store the cpuid
if (strcmp(jl_options.cpu_target,"native") == 0) {
uint32_t info[4];
jl_cpuid((int32_t*)info, 1);
globalvars.push_back(addComdat(new GlobalVariable(
*mod,
T_int64,
true,
GlobalVariable::ExternalLinkage,
ConstantInt::get(T_int64,((uint64_t)info[2])|(((uint64_t)info[3])<<32)),
"jl_sysimg_cpu_cpuid")));
}
#endif
}
static int32_t jl_assign_functionID(Function *functionObject)
{
// give the function an index in the constant lookup table
if (!imaging_mode)
return 0;
jl_sysimg_gvars.push_back(ConstantExpr::getBitCast(functionObject,T_psize));
return jl_sysimg_gvars.size();
}
static Value *julia_gv(const char *cname, void *addr)
{
// emit a GlobalVariable for a jl_value_t named "cname"
std::map<void*, jl_value_llvm>::iterator it;
// first see if there already is a GlobalVariable for this address
it = jl_value_to_llvm.find(addr);
if (it != jl_value_to_llvm.end())
return builder.CreateLoad(it->second.gv);
std::stringstream gvname;
gvname << cname << globalUnique++;
// no existing GlobalVariable, create one and store it
GlobalVariable *gv = new GlobalVariable(*jl_Module, jl_pvalue_llvmt,
false, imaging_mode ? GlobalVariable::InternalLinkage : GlobalVariable::ExternalLinkage,
ConstantPointerNull::get((PointerType*)jl_pvalue_llvmt), gvname.str());
addComdat(gv);
// make the pointer valid for this session
#ifdef USE_MCJIT
llvm_to_jl_value[gv] = addr;
#else
void **p = (void**)jl_ExecutionEngine->getPointerToGlobal(gv);
*p = addr;
#endif
// make the pointer valid for future sessions
jl_sysimg_gvars.push_back(ConstantExpr::getBitCast(gv, T_psize));
jl_value_llvm gv_struct;
gv_struct.gv = gv;
gv_struct.index = jl_sysimg_gvars.size();
jl_value_to_llvm[addr] = gv_struct;
return builder.CreateLoad(gv);
}
static Value *julia_gv(const char *prefix, jl_sym_t *name, jl_module_t *mod, void *addr)
{
// emit a GlobalVariable for a jl_value_t, using the prefix, name, and module to
// to create a readable name of the form prefixModA.ModB.name
size_t len = strlen(name->name)+strlen(prefix)+1;
jl_module_t *parent = mod, *prev = NULL;
while (parent != NULL && parent != prev) {
len += strlen(parent->name->name)+1;
prev = parent;
parent = parent->parent;
}
char *fullname = (char*)alloca(len);
strcpy(fullname, prefix);
len -= strlen(name->name)+1;
strcpy(fullname+len,name->name);
parent = mod;
prev = NULL;
while (parent != NULL && parent != prev) {
size_t part = strlen(parent->name->name)+1;
strcpy(fullname+len-part,parent->name->name);
fullname[len-1] = '.';
len -= part;
prev = parent;
parent = parent->parent;
}
return julia_gv(fullname, addr);
}
static Value *literal_pointer_val(jl_value_t *p)
{
// emit a pointer to any jl_value_t which will be valid across reloading code
// also, try to give it a nice name for gdb, for easy identification
if (p == NULL)
return ConstantPointerNull::get((PointerType*)jl_pvalue_llvmt);
// some common constant values
if (p == jl_false)
return tbaa_decorate(tbaa_const, builder.CreateLoad(prepare_global(jlfalse_var)));
if (p == jl_true)
return tbaa_decorate(tbaa_const, builder.CreateLoad(prepare_global(jltrue_var)));
if (p == (jl_value_t*)jl_emptysvec)
return tbaa_decorate(tbaa_const, builder.CreateLoad(prepare_global(jlemptysvec_var)));
if (!imaging_mode)
return literal_static_pointer_val(p, jl_pvalue_llvmt);
if (jl_is_datatype(p)) {
jl_datatype_t *addr = (jl_datatype_t*)p;
// DataTypes are prefixed with a +
return julia_gv("+", addr->name->name, addr->name->module, p);
}
if (jl_is_func(p)) {
jl_lambda_info_t *linfo = ((jl_function_t*)p)->linfo;
// Functions are prefixed with a -
if (linfo != NULL)
return julia_gv("-", linfo->name, linfo->module, p);
// Anonymous lambdas are prefixed with jl_method#
return julia_gv("jl_method#", p);
}
if (jl_is_lambda_info(p)) {
jl_lambda_info_t *linfo = (jl_lambda_info_t*)p;
// Type-inferred functions are prefixed with a -
return julia_gv("-", linfo->name, linfo->module, p);
}
if (jl_is_symbol(p)) {
jl_sym_t *addr = (jl_sym_t*)p;
// Symbols are prefixed with jl_sym#
return julia_gv("jl_sym#", addr, NULL, p);
}
if (jl_is_gensym(p)) {
// GenSyms are prefixed with jl_gensym#
return julia_gv("jl_gensym#", p);
}
// something else gets just a generic name
return julia_gv("jl_global#", p);
}
static Value *literal_pointer_val(jl_binding_t *p)
{
// emit a pointer to any jl_value_t which will be valid across reloading code
if (p == NULL)
return ConstantPointerNull::get((PointerType*)jl_pvalue_llvmt);
if (!imaging_mode)
return literal_static_pointer_val(p, jl_pvalue_llvmt);
// bindings are prefixed with jl_bnd#
return julia_gv("jl_bnd#", p->name, p->owner, p);
}
static Value *julia_binding_gv(jl_binding_t *b)
{
// emit a literal_pointer_val to the value field of a jl_binding_t
// binding->value are prefixed with *
Value *bv = imaging_mode ?
builder.CreateBitCast(julia_gv("*", b->name, b->owner, b), jl_ppvalue_llvmt) :
literal_static_pointer_val(b,jl_ppvalue_llvmt);
return builder.CreateGEP(bv,ConstantInt::get(T_size,
offsetof(jl_binding_t,value)/sizeof(size_t)));
}
// --- mapping between julia and llvm types ---
static bool type_is_ghost(Type *ty)
{
return (ty == T_void || ty->isEmptyTy());
}
static Type *julia_struct_to_llvm(jl_value_t *jt);
extern "C" {
DLLEXPORT Type *julia_type_to_llvm(jl_value_t *jt)
{
// this function converts a Julia Type into the equivalent LLVM type
if (jt == (jl_value_t*)jl_bool_type) return T_int1;
if (jt == (jl_value_t*)jl_bottom_type) return T_void;
if (!jl_is_leaf_type(jt))
return jl_pvalue_llvmt;
if (jl_is_cpointer_type(jt)) {
Type *lt = julia_type_to_llvm(jl_tparam0(jt));
if (lt == NULL)
return NULL;
if (lt == T_void)
return T_pint8;
return PointerType::get(lt, 0);
}
if (jl_is_bitstype(jt)) {
int nb = jl_datatype_size(jt);
if (jl_is_floattype(jt)) {
#ifndef DISABLE_FLOAT16
if (nb == 2)
return Type::getHalfTy(jl_LLVMContext);
else
#endif
if (nb == 4)
return Type::getFloatTy(jl_LLVMContext);
else if (nb == 8)
return Type::getDoubleTy(jl_LLVMContext);
else if (nb == 16)
return Type::getFP128Ty(jl_LLVMContext);
}
return Type::getIntNTy(jl_LLVMContext, nb*8);
}
if (jl_isbits(jt)) {
if (((jl_datatype_t*)jt)->size == 0) {
return T_void;
}
return julia_struct_to_llvm(jt);
}
return jl_pvalue_llvmt;
}
}
static Type *julia_struct_to_llvm(jl_value_t *jt)
{
// this function converts a Julia Type into the equivalent LLVM struct
// use this where C-compatible (unboxed) structs are desired
// use julia_type_to_llvm directly when you want to preserve Julia's type semantics
bool isTuple = jl_is_tuple_type(jt);
if ((isTuple || jl_is_structtype(jt)) && !jl_is_array_type(jt)) {
if (!jl_is_leaf_type(jt))
return NULL;
jl_datatype_t *jst = (jl_datatype_t*)jt;
if (jst->struct_decl == NULL) {
size_t ntypes = jl_datatype_nfields(jst);
if (ntypes == 0 || jst->size == 0)
return T_void;
StructType *structdecl;
if (!isTuple) {
structdecl = StructType::create(jl_LLVMContext, jst->name->name->name);
jst->struct_decl = structdecl;
}
std::vector<Type*> latypes(0);
size_t i;
bool isvector = true;
Type *lasttype = NULL;
for(i = 0; i < ntypes; i++) {
jl_value_t *ty = jl_svecref(jst->types, i);
Type *lty;
if (jst->fields[i].isptr)
lty = jl_pvalue_llvmt;
else
lty = ty==(jl_value_t*)jl_bool_type ? T_int8 : julia_type_to_llvm(ty);
if (lasttype != NULL && lasttype != lty)
isvector = false;
lasttype = lty;
if (lty == T_void || lty->isEmptyTy())
lty = NoopType;
latypes.push_back(lty);
}
if (!isTuple) {
structdecl->setBody(latypes);
}
else {
if (isvector && lasttype != T_int1 && lasttype != T_void) {
// TODO: currently we get LLVM assertion failures for other vector sizes
// TODO: DataTypes do not yet support vector alignment requirements,
// so only use array ABI for tuples for now.
/*
bool validVectorSize = ntypes <= 6 || (ntypes&1)==0;
if (lasttype->isSingleValueType() && !lasttype->isVectorTy() && validVectorSize)
jst->struct_decl = VectorType::get(lasttype,ntypes);
else
*/
jst->struct_decl = ArrayType::get(lasttype,ntypes);
}
else {
jst->struct_decl = StructType::get(jl_LLVMContext,ArrayRef<Type*>(&latypes[0],ntypes));
}
}
}
return (Type*)jst->struct_decl;
}
return julia_type_to_llvm(jt);
}
// NOTE: llvm cannot express all julia types (for example unsigned),
// so this is an approximation. it's only correct if the associated LLVM
// value is not tagged with our value name hack.
// boxed(v) below gets the correct type.
static jl_value_t *llvm_type_to_julia(Type *t, bool throw_error)
{
if (t == T_int1) return (jl_value_t*)jl_bool_type;
if (t == T_int8) return (jl_value_t*)jl_int8_type;
if (t == T_int16) return (jl_value_t*)jl_int16_type;
if (t == T_int32) return (jl_value_t*)jl_int32_type;
if (t == T_int64) return (jl_value_t*)jl_int64_type;
if (t == T_float32) return (jl_value_t*)jl_float32_type;
if (t == T_float64) return (jl_value_t*)jl_float64_type;
if (t == T_void) return (jl_value_t*)jl_void_type;
if (t->isEmptyTy()) return (jl_value_t*)jl_void_type;
if (t == jl_pvalue_llvmt)
return (jl_value_t*)jl_any_type;
if (t->isPointerTy()) {
jl_value_t *elty = llvm_type_to_julia(t->getContainedType(0),
throw_error);
if (elty != NULL) {
return (jl_value_t*)jl_apply_type((jl_value_t*)jl_pointer_type,
jl_svec1(elty));
}
}
if (throw_error) {
jl_error("cannot convert type to a julia type");
}
return NULL;
}
static bool is_datatype_all_pointers(jl_datatype_t *dt)
{
size_t i, l = jl_datatype_nfields(dt);
for(i=0; i < l; i++) {
if (!dt->fields[i].isptr)
return false;
}
return true;
}
static bool is_tupletype_homogeneous(jl_svec_t *t)
{
size_t i, l = jl_svec_len(t);
if (l > 0) {
jl_value_t *t0 = jl_svecref(t, 0);
if (!jl_is_leaf_type(t0))
return false;
for(i=1; i < l; i++) {
if (!jl_types_equal(t0, jl_svecref(t,i)))
return false;
}
}
return true;
}
// --- scheme for tagging llvm values with julia types using metadata ---
static std::map<int, jl_value_t*> typeIdToType;
extern "C" {
jl_array_t *typeToTypeId;
}
static int cur_type_id = 1;
static int jl_type_to_typeid(jl_value_t *t)
{
jl_value_t *idx = jl_eqtable_get(typeToTypeId, t, NULL);
if (idx == NULL) {
int mine = cur_type_id++;
if (mine > 65025)
jl_error("internal compiler error: too many bits types");
JL_GC_PUSH1(&idx);
idx = jl_box_long(mine);
typeToTypeId = jl_eqtable_put(typeToTypeId, t, idx);
typeIdToType[mine] = t;
JL_GC_POP();
return mine;
}
return jl_unbox_long(idx);
}
static jl_value_t *jl_typeid_to_type(int i)
{
std::map<int, jl_value_t*>::iterator it = typeIdToType.find(i);
if (it == typeIdToType.end()) {
jl_error("internal compiler error: invalid type id");
}
return (*it).second;
}
static bool has_julia_type(Value *v)
{
Instruction *inst = (dyn_cast<Instruction>(v));
return (inst != NULL) &&
(inst->getMetadata("julia_type")!=NULL);
}
static jl_value_t *julia_type_of_without_metadata(Value *v, bool err=true)
{
if (dyn_cast<AllocaInst>(v) != NULL ||
dyn_cast<GetElementPtrInst>(v) != NULL) {
// an alloca always has llvm type pointer
return llvm_type_to_julia(v->getType()->getContainedType(0), err);
}
return llvm_type_to_julia(v->getType(), err);
}
static jl_value_t *julia_type_of(Value *v)
{
MDNode *mdn;
assert(v != NULL);
if (dyn_cast<Instruction>(v) == NULL ||
(mdn = ((Instruction*)v)->getMetadata("julia_type")) == NULL) {
return julia_type_of_without_metadata(v, true);
}
#ifdef LLVM36
MDString *md = dyn_cast<MDString>(mdn->getOperand(0).get());
#else
MDString *md = (MDString*)mdn->getOperand(0);
#endif
assert(md != NULL);
const unsigned char *vts = (const unsigned char*)md->getString().data();
int idx = (vts[0]-1) + (vts[1]-1)*255;
return jl_typeid_to_type(idx);
}
static Value *NoOpInst(Value *v)
{
v = SelectInst::Create(ConstantInt::get(T_int1,1), v, v);
builder.Insert((Instruction*)v);
return v;
}
static Value *mark_julia_type(Value *v, jl_value_t *jt)
{
if (jt == (jl_value_t*)jl_any_type || v->getType()==jl_pvalue_llvmt)
return v;
if (has_julia_type(v)) {
if (julia_type_of(v) == jt)
return v;
v = NoOpInst(v);
}
else if (julia_type_of_without_metadata(v,false) == jt) {
return v;
}
if (dyn_cast<Instruction>(v) == NULL)
v = NoOpInst(v);
assert(dyn_cast<Instruction>(v));
char name[3];
int idx = jl_type_to_typeid(jt);
// store idx as base-255 to avoid NUL
name[0] = (idx%255)+1;
name[1] = (idx/255)+1;
name[2] = '\0';
MDString *md = MDString::get(jl_LLVMContext, name);
#ifdef LLVM36
MDNode *mdn = MDNode::get(jl_LLVMContext, ArrayRef<Metadata*>(md));
#else
MDNode *mdn = MDNode::get(jl_LLVMContext, ArrayRef<Value*>(md));
#endif
((Instruction*)v)->setMetadata("julia_type", mdn);
return v;
}
// --- generating various field accessors ---
static Value *emit_nthptr_addr(Value *v, ssize_t n)
{
return builder.CreateGEP(builder.CreateBitCast(v, jl_ppvalue_llvmt),
ConstantInt::get(T_size, (ssize_t)n));
}
static Value *emit_nthptr_addr(Value *v, Value *idx)
{
return builder.CreateGEP(builder.CreateBitCast(v, jl_ppvalue_llvmt), idx);
}
static Value *emit_nthptr(Value *v, ssize_t n, MDNode *tbaa)
{
// p = (jl_value_t**)v; p[n]
Value *vptr = emit_nthptr_addr(v, n);
return tbaa_decorate(tbaa,builder.CreateLoad(vptr, false));
}
static Value *emit_nthptr_recast(Value *v, ssize_t n, MDNode *tbaa, Type* ptype)
{
// p = (jl_value_t**)v; *(ptype)&p[n]
Value *vptr = emit_nthptr_addr(v, n);
return tbaa_decorate(tbaa,builder.CreateLoad(builder.CreateBitCast(vptr,ptype), false));
}
static Value *emit_nthptr_recast(Value *v, Value *idx, MDNode *tbaa, Type *ptype)
{
// p = (jl_value_t**)v; *(ptype)&p[n]
Value *vptr = emit_nthptr_addr(v, idx);
return tbaa_decorate(tbaa,builder.CreateLoad(builder.CreateBitCast(vptr,ptype), false));
}
static Value *emit_typeptr_addr(Value *p)
{
ssize_t offset = (offsetof(jl_taggedvalue_t,value) - offsetof(jl_taggedvalue_t,type)) / sizeof(jl_value_t*);
return emit_nthptr_addr(p, -offset);
}
static Value *emit_typeof(Value *p)
{
// given p, a jl_value_t*, compute its type tag
if (p->getType() == jl_pvalue_llvmt) {
Value *tt = builder.CreateBitCast(p, jl_ppvalue_llvmt);
tt = builder.CreateLoad(emit_typeptr_addr(tt), false);
#ifdef OVERLAP_SVEC_LEN
tt = builder.CreateIntToPtr(builder.CreateAnd(
builder.CreatePtrToInt(tt, T_int64),
ConstantInt::get(T_int64,0x000ffffffffffffe)),
jl_pvalue_llvmt);
#else
tt = builder.CreateIntToPtr(builder.CreateAnd(
builder.CreatePtrToInt(tt, T_size),
ConstantInt::get(T_size,~(uptrint_t)3)),
jl_pvalue_llvmt);
#endif
return tt;
}
return literal_pointer_val(julia_type_of(p));
}
static Value *emit_datatype_types(Value *dt)
{
return builder.
CreateLoad(builder.
CreateBitCast(builder.
CreateGEP(builder.CreateBitCast(dt, T_pint8),
ConstantInt::get(T_size, offsetof(jl_datatype_t, types))),
jl_ppvalue_llvmt));
}
static Value *emit_datatype_nfields(Value *dt)
{
Value *nf = builder.
CreateLoad(builder.
CreateBitCast(builder.
CreateGEP(builder.CreateBitCast(dt, T_pint8),
ConstantInt::get(T_size, offsetof(jl_datatype_t, nfields))),
T_pint32));
#ifdef _P64
nf = builder.CreateSExt(nf, T_int64);
#endif
return nf;
}
// --- generating various error checks ---
static jl_value_t *llvm_type_to_julia(Type *t, bool err=true);
static void just_emit_error(const std::string &txt, jl_codectx_t *ctx)
{
Value *zeros[2] = { ConstantInt::get(T_int32, 0),
ConstantInt::get(T_int32, 0) };
builder.CreateCall(prepare_call(jlerror_func),
builder.CreateGEP(stringConst(txt),
ArrayRef<Value*>(zeros)));
}
static void emit_error(const std::string &txt, jl_codectx_t *ctx)
{
just_emit_error(txt, ctx);
builder.CreateUnreachable();
BasicBlock *cont = BasicBlock::Create(getGlobalContext(),"after_error",ctx->f);
builder.SetInsertPoint(cont);
}
static void error_unless(Value *cond, const std::string &msg, jl_codectx_t *ctx)
{
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(cond, passBB, failBB);
builder.SetInsertPoint(failBB);
just_emit_error(msg, ctx);
builder.CreateUnreachable();
ctx->f->getBasicBlockList().push_back(passBB);
builder.SetInsertPoint(passBB);
}
static void raise_exception_unless(Value *cond, Value *exc, jl_codectx_t *ctx)
{
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(cond, passBB, failBB);
builder.SetInsertPoint(failBB);
builder.CreateCall2(prepare_call(jlthrow_line_func), exc,
ConstantInt::get(T_int32, ctx->lineno));
builder.CreateUnreachable();
ctx->f->getBasicBlockList().push_back(passBB);
builder.SetInsertPoint(passBB);
}
static void raise_exception_unless(Value *cond, GlobalVariable *exc,
jl_codectx_t *ctx)
{
raise_exception_unless(cond, (Value*)tbaa_decorate(tbaa_const,builder.CreateLoad(exc, false)), ctx);
}
static void raise_exception_if(Value *cond, Value *exc, jl_codectx_t *ctx)
{
raise_exception_unless(builder.CreateXor(cond, ConstantInt::get(T_int1,-1)),
exc, ctx);
}
static void raise_exception_if(Value *cond, GlobalVariable *exc, jl_codectx_t *ctx)
{
raise_exception_if(cond, (Value*)builder.CreateLoad(exc, false), ctx);
}
static void null_pointer_check(Value *v, jl_codectx_t *ctx)
{
raise_exception_unless(builder.CreateICmpNE(v,Constant::getNullValue(v->getType())),
prepare_global(jlundeferr_var), ctx);
}
static Value *boxed(Value *v, jl_codectx_t *ctx, jl_value_t *jt=NULL);
static void emit_type_error(Value *x, jl_value_t *type, const std::string &msg,
jl_codectx_t *ctx)
{
Value *zeros[2] = { ConstantInt::get(T_int32, 0),
ConstantInt::get(T_int32, 0) };
Value *fname_val = builder.CreateGEP(stringConst(ctx->funcName),
ArrayRef<Value*>(zeros));
Value *msg_val = builder.CreateGEP(stringConst(msg),
ArrayRef<Value*>(zeros));
builder.CreateCall5(prepare_call(jltypeerror_func),
fname_val, msg_val,
literal_pointer_val(type), boxed(x,ctx),
ConstantInt::get(T_int32, ctx->lineno));
}
static void emit_typecheck(Value *x, jl_value_t *type, const std::string &msg,
jl_codectx_t *ctx)
{
Value *istype;
if (jl_is_type_type(type) || !jl_is_leaf_type(type)) {
istype = builder.
CreateICmpNE(builder.CreateCall3(prepare_call(jlsubtype_func), x, literal_pointer_val(type),
ConstantInt::get(T_int32,1)),
ConstantInt::get(T_int32,0));
}
else {
istype = builder.CreateICmpEQ(emit_typeof(x), literal_pointer_val(type));
}
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(istype, passBB, failBB);
builder.SetInsertPoint(failBB);
emit_type_error(x, type, msg, ctx);
builder.CreateUnreachable();
ctx->f->getBasicBlockList().push_back(passBB);
builder.SetInsertPoint(passBB);
}
#define CHECK_BOUNDS 1
static Value *emit_bounds_check(Value *a, jl_value_t *ty, Value *i, Value *len, jl_codectx_t *ctx)
{
Value *im1 = builder.CreateSub(i, ConstantInt::get(T_size, 1));
#if CHECK_BOUNDS==1
if (((ctx->boundsCheck.empty() || ctx->boundsCheck.back()==true) &&
jl_options.check_bounds != JL_OPTIONS_CHECK_BOUNDS_OFF) ||
jl_options.check_bounds == JL_OPTIONS_CHECK_BOUNDS_ON) {
Value *ok = builder.CreateICmpULT(im1, len);
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(ok, passBB, failBB);
builder.SetInsertPoint(failBB);
if (ty == (jl_value_t*)jl_any_type) {
builder.CreateCall3(prepare_call(jlvboundserror_func), a, len, i);
}
else if (ty) {