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intrinsics.cpp
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// This file is a part of Julia. License is MIT: https://julialang.org/license
namespace JL_I {
#include "intrinsics.h"
}
#include "ccall.cpp"
//Mark our stats as being from intrinsics irgen
#undef DEBUG_TYPE
#define DEBUG_TYPE "julia_irgen_intrinsics"
STATISTIC(EmittedConstants, "Number of constants emitted");
STATISTIC(EmittedCoercedUnboxes, "Number of unbox coercions emitted");
STATISTIC(EmittedUnboxes, "Number of unboxes emitted");
STATISTIC(EmittedRuntimeCalls, "Number of runtime intrinsic calls emitted");
STATISTIC(EmittedIntrinsics, "Number of intrinsic calls emitted");
STATISTIC(Emitted_pointerref, "Number of pointerref calls emitted");
STATISTIC(Emitted_pointerset, "Number of pointerset calls emitted");
STATISTIC(Emitted_atomic_fence, "Number of atomic_fence calls emitted");
STATISTIC(Emitted_atomic_pointerref, "Number of atomic_pointerref calls emitted");
STATISTIC(Emitted_atomic_pointerop, "Number of atomic_pointerop calls emitted");
STATISTIC(Emitted_bitcast, "Number of bitcast calls emitted");
STATISTIC(Emitted_trunc_int, "Number of trunc_int calls emitted");
STATISTIC(Emitted_sext_int, "Number of sext_int calls emitted");
STATISTIC(Emitted_zext_int, "Number of zext_int calls emitted");
STATISTIC(Emitted_uitofp, "Number of uitofp calls emitted");
STATISTIC(Emitted_sitofp, "Number of sitofp calls emitted");
STATISTIC(Emitted_fptoui, "Number of fptoui calls emitted");
STATISTIC(Emitted_fptosi, "Number of fptosi calls emitted");
STATISTIC(Emitted_fptrunc, "Number of fptrunc calls emitted");
STATISTIC(Emitted_fpext, "Number of fpext calls emitted");
STATISTIC(Emitted_not_int, "Number of not_int calls emitted");
STATISTIC(Emitted_have_fma, "Number of have_fma calls emitted");
STATISTIC(EmittedUntypedIntrinsics, "Number of untyped intrinsics emitted");
using namespace JL_I;
FunctionType *get_intr_args1(LLVMContext &C) { return FunctionType::get(JuliaType::get_prjlvalue_ty(C), {JuliaType::get_prjlvalue_ty(C)}, false); }
FunctionType *get_intr_args2(LLVMContext &C) { return FunctionType::get(JuliaType::get_prjlvalue_ty(C), {JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C)}, false); }
FunctionType *get_intr_args3(LLVMContext &C) { return FunctionType::get(JuliaType::get_prjlvalue_ty(C), {JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C)}, false); }
FunctionType *get_intr_args4(LLVMContext &C) { return FunctionType::get(JuliaType::get_prjlvalue_ty(C), {JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C)}, false); }
FunctionType *get_intr_args5(LLVMContext &C) { return FunctionType::get(JuliaType::get_prjlvalue_ty(C), {JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C), JuliaType::get_prjlvalue_ty(C)}, false); }
const auto &runtime_func() {
static struct runtime_funcs_t {
std::array<JuliaFunction<> *, num_intrinsics> runtime_func;
runtime_funcs_t() :
runtime_func{
#define ADD_I(name, nargs) new JuliaFunction<>{XSTR(jl_##name), get_intr_args##nargs, nullptr},
#define ADD_HIDDEN ADD_I
#define ALIAS(alias, base) nullptr,
INTRINSICS
#undef ADD_I
#undef ADD_HIDDEN
#undef ALIAS
}
{
#define ADD_I(name, nargs)
#define ADD_HIDDEN(name, nargs)
#define ALIAS(alias, base) runtime_func[alias] = runtime_func[base];
INTRINSICS
#undef ADD_I
#undef ADD_HIDDEN
#undef ALIAS
}
} runtime_funcs;
return runtime_funcs.runtime_func;
}
const auto &float_func() {
static struct float_funcs_t {
std::bitset<num_intrinsics> float_func;
float_funcs_t() {
float_func[neg_float] = true;
float_func[neg_float_fast] = true;
float_func[add_float] = true;
float_func[sub_float] = true;
float_func[mul_float] = true;
float_func[div_float] = true;
float_func[add_float_fast] = true;
float_func[sub_float_fast] = true;
float_func[mul_float_fast] = true;
float_func[div_float_fast] = true;
float_func[fma_float] = true;
float_func[muladd_float] = true;
float_func[eq_float] = true;
float_func[ne_float] = true;
float_func[lt_float] = true;
float_func[le_float] = true;
float_func[eq_float_fast] = true;
float_func[ne_float_fast] = true;
float_func[lt_float_fast] = true;
float_func[le_float_fast] = true;
float_func[fpiseq] = true;
float_func[abs_float] = true;
float_func[copysign_float] = true;
float_func[ceil_llvm] = true;
float_func[floor_llvm] = true;
float_func[trunc_llvm] = true;
float_func[rint_llvm] = true;
float_func[sqrt_llvm] = true;
float_func[sqrt_llvm_fast] = true;
}
} float_funcs;
return float_funcs.float_func;
}
extern "C" JL_DLLEXPORT_CODEGEN
uint32_t jl_get_LLVM_VERSION_impl(void)
{
return 10000 * LLVM_VERSION_MAJOR + 100 * LLVM_VERSION_MINOR
#ifdef LLVM_VERSION_PATCH
+ LLVM_VERSION_PATCH
#endif
;
}
/*
low-level intrinsics design:
intrinsics only operate on bitstype values
any composite type is expected to be handled via its constructor,
so it is not permitted here
functions like add_int expect unboxed values of matching types
every operation that can return an unboxed value does so.
this maximizes opportunities for composing functions without
unnecessary boxing.
the bitcast function does nothing except change the type tag
of a value. At the user-level, it is perhaps better known as reinterpret.
boxing is delayed until absolutely necessary, and handled at the point
where the box is needed.
all intrinsics have a non-compiled implementation, this file contains
the optimizations for handling them unboxed
*/
// convert an llvm type to same-size float type
static Type *FLOATT(Type *t)
{
if (t->isFloatingPointTy())
return t;
unsigned nb = (t->isPointerTy() ? sizeof(void*) * 8 : t->getPrimitiveSizeInBits());
auto &ctxt = t->getContext();
if (nb == 64)
return getDoubleTy(ctxt);
if (nb == 32)
return getFloatTy(ctxt);
if (nb == 16)
return getHalfTy(ctxt);
if (nb == 128)
return getFP128Ty(ctxt);
return NULL;
}
// convert an llvm type to same-size int type
static Type *INTT(Type *t, const DataLayout &DL)
{
auto &ctxt = t->getContext();
if (t->isIntegerTy())
return t;
if (t->isPointerTy())
return DL.getIntPtrType(t);
if (t == getDoubleTy(ctxt))
return getInt64Ty(ctxt);
if (t == getFloatTy(ctxt))
return getInt32Ty(ctxt);
if (t == getHalfTy(ctxt) || t == getBFloatTy(ctxt))
return getInt16Ty(ctxt);
unsigned nb = t->getPrimitiveSizeInBits();
assert(t != getVoidTy(ctxt) && nb > 0);
return IntegerType::get(ctxt, nb);
}
static Value *uint_cnvt(jl_codectx_t &ctx, Type *to, Value *x)
{
return ctx.builder.CreateZExtOrTrunc(x, to);
}
static Constant *julia_const_to_llvm(jl_codectx_t &ctx, const void *ptr, jl_datatype_t *bt)
{
// assumes `jl_is_pointerfree(bt)`.
// `ptr` can point to a inline field, do not read the tag from it.
// make sure to return exactly the type specified by
// julia_type_to_llvm as this will be assumed by the callee.
if (bt == jl_bool_type)
return ConstantInt::get(getInt8Ty(ctx.builder.getContext()), (*(const uint8_t*)ptr) ? 1 : 0);
Type *lt = julia_struct_to_llvm(ctx, (jl_value_t*)bt, NULL);
if (jl_is_vecelement_type((jl_value_t*)bt) && !jl_is_uniontype(jl_tparam0(bt)))
bt = (jl_datatype_t*)jl_tparam0(bt);
if (type_is_ghost(lt))
return UndefValue::get(lt);
if (lt->isFloatTy()) {
uint32_t data32 = *(const uint32_t*)ptr;
return ConstantFP::get(ctx.builder.getContext(),
APFloat(lt->getFltSemantics(), APInt(32, data32)));
}
if (lt->isDoubleTy()) {
uint64_t data64 = *(const uint64_t*)ptr;
return ConstantFP::get(ctx.builder.getContext(),
APFloat(lt->getFltSemantics(), APInt(64, data64)));
}
if (lt->isFloatingPointTy() || lt->isIntegerTy() || lt->isPointerTy()) {
int nb = jl_datatype_size(bt);
APInt val(8 * nb, 0);
void *bits = const_cast<uint64_t*>(val.getRawData());
assert(sys::IsLittleEndianHost);
memcpy(bits, ptr, nb);
if (lt->isFloatingPointTy()) {
return ConstantFP::get(ctx.builder.getContext(),
APFloat(lt->getFltSemantics(), val));
}
if (lt->isPointerTy()) {
Type *Ty = IntegerType::get(ctx.builder.getContext(), 8 * nb);
Constant *addr = ConstantInt::get(Ty, val);
return ConstantExpr::getIntToPtr(addr, lt);
}
assert(cast<IntegerType>(lt)->getBitWidth() == 8u * nb);
return ConstantInt::get(lt, val);
}
size_t nf = jl_datatype_nfields(bt);
SmallVector<Constant*, 0> fields(0);
for (size_t i = 0; i < nf; i++) {
size_t offs = jl_field_offset(bt, i);
jl_value_t *ft = jl_field_type(bt, i);
Type *lft = julia_type_to_llvm(ctx, ft);
if (type_is_ghost(lft))
continue;
assert(!jl_field_isptr(bt, i));
unsigned llvm_idx = isa<StructType>(lt) ? convert_struct_offset(jl_Module->getDataLayout(), lt, offs) : i;
while (fields.size() < llvm_idx)
fields.push_back(
UndefValue::get(GetElementPtrInst::getTypeAtIndex(lt, fields.size())));
const uint8_t *ov = (const uint8_t*)ptr + offs;
if (jl_is_uniontype(ft)) {
// compute the same type layout as julia_struct_to_llvm
size_t fsz = 0, al = 0;
(void)jl_islayout_inline(ft, &fsz, &al); // compute al
fsz = jl_field_size(bt, i); // get LLT_ALIGN(fsz+1,al)
uint8_t sel = ((const uint8_t*)ptr)[offs + fsz - 1];
jl_value_t *active_ty = jl_nth_union_component(ft, sel);
size_t active_sz = jl_datatype_size(active_ty);
Type *AlignmentType = IntegerType::get(ctx.builder.getContext(), 8 * al);
unsigned NumATy = (fsz - 1) / al;
unsigned remainder = (fsz - 1) % al;
while (NumATy--) {
Constant *fld;
if (active_sz > 0) {
APInt Elem(8 * al, 0);
void *bits = const_cast<uint64_t*>(Elem.getRawData());
if (active_sz > al) {
memcpy(bits, ov, al);
active_sz -= al;
}
else {
memcpy(bits, ov, active_sz);
active_sz = 0;
}
fld = ConstantInt::get(AlignmentType, Elem);
}
else {
fld = UndefValue::get(AlignmentType);
}
ov += al;
fields.push_back(fld);
}
while (remainder--) {
Constant *fld;
if (active_sz > 0) {
uint8_t byte = *ov;
APInt Elem(8, byte);
active_sz -= 1;
fld = ConstantInt::get(getInt8Ty(ctx.builder.getContext()), Elem);
}
else {
fld = UndefValue::get(getInt8Ty(ctx.builder.getContext()));
}
ov += 1;
fields.push_back(fld);
}
fields.push_back(ConstantInt::get(getInt8Ty(ctx.builder.getContext()), sel));
}
else {
Constant *val = julia_const_to_llvm(ctx, ov, (jl_datatype_t*)ft);
fields.push_back(val);
}
}
if (lt->isVectorTy())
return ConstantVector::get(fields);
if (StructType *st = dyn_cast<StructType>(lt))
return ConstantStruct::get(st, fields);
if (ArrayType *at = dyn_cast<ArrayType>(lt))
return ConstantArray::get(at, fields);
assert(false && "Unknown LLVM type");
jl_unreachable();
}
static Constant *julia_const_to_llvm(jl_codectx_t &ctx, jl_value_t *e)
{
if (e == jl_true)
return ConstantInt::get(getInt8Ty(ctx.builder.getContext()), 1);
if (e == jl_false)
return ConstantInt::get(getInt8Ty(ctx.builder.getContext()), 0);
jl_value_t *bt = jl_typeof(e);
if (!jl_is_pointerfree(bt))
return NULL;
return julia_const_to_llvm(ctx, e, (jl_datatype_t*)bt);
}
static Constant *undef_value_for_type(Type *T) {
auto tracked = CountTrackedPointers(T);
Constant *undef;
if (tracked.count)
// make sure gc pointers (including ptr_phi of union-split) are initialized to NULL
undef = Constant::getNullValue(T);
else
undef = UndefValue::get(T);
return undef;
}
// rebuild a struct type with any i1 Bool (e.g. the llvmcall type) widened to i8 (the native size for memcpy)
static Type *zext_struct_type(Type *T)
{
if (auto *AT = dyn_cast<ArrayType>(T)) {
return ArrayType::get(AT->getElementType(), AT->getNumElements());
}
else if (auto *ST = dyn_cast<StructType>(T)) {
SmallVector<Type*> Elements(ST->element_begin(), ST->element_end());
for (size_t i = 0; i < Elements.size(); i++) {
Elements[i] = zext_struct_type(Elements[i]);
}
return StructType::get(ST->getContext(), Elements, ST->isPacked());
}
else if (auto *VT = dyn_cast<VectorType>(T)) {
return VectorType::get(zext_struct_type(VT->getElementType()), VT);
}
else if (auto *IT = dyn_cast<IntegerType>(T)) {
unsigned BitWidth = IT->getBitWidth();
if (alignTo(BitWidth, 8) != BitWidth)
return IntegerType::get(IT->getContext(), alignTo(BitWidth, 8));
}
return T;
}
// rebuild a struct with any i1 Bool (e.g. the llvmcall type) widened to i8 (the native size for memcpy)
static Value *zext_struct_helper(jl_codectx_t &ctx, Value *V, Type *T2)
{
Type *T = V->getType();
if (T == T2)
return V;
if (auto *AT = dyn_cast<ArrayType>(T2)) {
Value *V2 = undef_value_for_type(AT);
for (size_t i = 0; i < AT->getNumElements(); i++) {
Value *E = zext_struct_helper(ctx, ctx.builder.CreateExtractValue(V, i), AT->getElementType());
V2 = ctx.builder.CreateInsertValue(V2, E, i);
}
return V2;
}
else if (auto *ST = dyn_cast<StructType>(T2)) {
Value *V2 = undef_value_for_type(ST);
for (size_t i = 0; i < ST->getNumElements(); i++) {
Value *E = zext_struct_helper(ctx, ctx.builder.CreateExtractValue(V, i), ST->getElementType(i));
V2 = ctx.builder.CreateInsertValue(V2, E, i);
}
return V2;
}
else if (T2->isIntegerTy() || T2->isVectorTy()) {
return ctx.builder.CreateZExt(V, T2);
}
return V;
}
static Value *zext_struct(jl_codectx_t &ctx, Value *V)
{
return zext_struct_helper(ctx, V, zext_struct_type(V->getType()));
}
static Value *emit_unboxed_coercion(jl_codectx_t &ctx, Type *to, Value *unboxed)
{
if (unboxed->getType() == to)
return unboxed;
if (CastInst::castIsValid(Instruction::Trunc, unboxed, to))
return ctx.builder.CreateTrunc(unboxed, to);
unboxed = zext_struct(ctx, unboxed);
Type *ty = unboxed->getType();
if (ty == to)
return unboxed;
bool frompointer = ty->isPointerTy();
bool topointer = to->isPointerTy();
const DataLayout &DL = jl_Module->getDataLayout();
if (ty->isVoidTy() || DL.getTypeSizeInBits(ty) != DL.getTypeSizeInBits(to)) {
// this can happen in dead code
CreateTrap(ctx.builder);
return UndefValue::get(to);
}
if (frompointer && topointer) {
unboxed = emit_bitcast(ctx, unboxed, to);
}
else if (!ty->isIntOrPtrTy() && !ty->isFloatingPointTy()) {
assert(DL.getTypeSizeInBits(ty) == DL.getTypeSizeInBits(to));
AllocaInst *cast = ctx.builder.CreateAlloca(ty);
setName(ctx.emission_context, cast, "coercion");
ctx.builder.CreateStore(unboxed, cast);
unboxed = ctx.builder.CreateLoad(to, ctx.builder.CreateBitCast(cast, to->getPointerTo()));
}
else if (frompointer) {
Type *INTT_to = INTT(to, DL);
unboxed = ctx.builder.CreatePtrToInt(unboxed, INTT_to);
setName(ctx.emission_context, unboxed, "coercion");
if (INTT_to != to)
unboxed = ctx.builder.CreateBitCast(unboxed, to);
}
else if (topointer) {
Type *INTT_to = INTT(to, DL);
if (to != INTT_to)
unboxed = ctx.builder.CreateBitCast(unboxed, INTT_to);
unboxed = emit_inttoptr(ctx, unboxed, to);
setName(ctx.emission_context, unboxed, "coercion");
}
else {
unboxed = ctx.builder.CreateBitCast(unboxed, to);
}
return unboxed;
}
// emit code to unpack a raw value from a box into registers
static Value *emit_unbox(jl_codectx_t &ctx, Type *to, const jl_cgval_t &x, jl_value_t *jt)
{
assert(to != getVoidTy(ctx.builder.getContext()));
// TODO: fully validate that x.typ == jt?
if (x.isghost) {
// this can happen when a branch yielding a different type ends
// up being dead code, and type inference knows that the other
// branch's type is the only one that matters.
if (type_is_ghost(to)) {
return NULL;
}
CreateTrap(ctx.builder);
return UndefValue::get(to); // type mismatch error
}
Constant *c = x.constant ? julia_const_to_llvm(ctx, x.constant) : NULL;
if (!x.ispointer() || c) { // already unboxed, but sometimes need conversion
Value *unboxed = c ? c : x.V;
return emit_unboxed_coercion(ctx, to, unboxed);
}
// bools stored as int8, so an extra Trunc is needed to get an int1
Value *p = x.constant ? literal_pointer_val(ctx, x.constant) : x.V;
if (jt == (jl_value_t*)jl_bool_type || to->isIntegerTy(1)) {
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, x.tbaa);
Instruction *unbox_load = ai.decorateInst(ctx.builder.CreateLoad(getInt8Ty(ctx.builder.getContext()), maybe_bitcast(ctx, p, getInt8PtrTy(ctx.builder.getContext()))));
setName(ctx.emission_context, unbox_load, p->getName() + ".unbox");
if (jt == (jl_value_t*)jl_bool_type)
unbox_load->setMetadata(LLVMContext::MD_range, MDNode::get(ctx.builder.getContext(), {
ConstantAsMetadata::get(ConstantInt::get(getInt8Ty(ctx.builder.getContext()), 0)),
ConstantAsMetadata::get(ConstantInt::get(getInt8Ty(ctx.builder.getContext()), 2)) }));
Value *unboxed;
if (to->isIntegerTy(1))
unboxed = ctx.builder.CreateTrunc(unbox_load, to);
else
unboxed = unbox_load; // `to` must be Int8Ty
return unboxed;
}
unsigned alignment = julia_alignment(jt);
Type *ptype = to->getPointerTo();
if (p->getType() != ptype && isa<AllocaInst>(p)) {
// LLVM's mem2reg can't handle coercion if the load/store type does
// not match the type of the alloca. As such, it is better to
// perform the load using the alloca's type and then perform the
// appropriate coercion manually.
AllocaInst *AI = cast<AllocaInst>(p);
Type *AllocType = AI->getAllocatedType();
const DataLayout &DL = jl_Module->getDataLayout();
if (!AI->isArrayAllocation() &&
(AllocType->isFloatingPointTy() || AllocType->isIntegerTy() || AllocType->isPointerTy()) &&
(to->isFloatingPointTy() || to->isIntegerTy() || to->isPointerTy()) &&
DL.getTypeSizeInBits(AllocType) == DL.getTypeSizeInBits(to)) {
Instruction *load = ctx.builder.CreateAlignedLoad(AllocType, p, Align(alignment));
setName(ctx.emission_context, load, p->getName() + ".unbox");
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, x.tbaa);
return emit_unboxed_coercion(ctx, to, ai.decorateInst(load));
}
}
p = maybe_bitcast(ctx, p, ptype);
Instruction *load = ctx.builder.CreateAlignedLoad(to, p, Align(alignment));
setName(ctx.emission_context, load, p->getName() + ".unbox");
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, x.tbaa);
return ai.decorateInst(load);
}
// emit code to store a raw value into a destination
static void emit_unbox_store(jl_codectx_t &ctx, const jl_cgval_t &x, Value *dest, MDNode *tbaa_dest, unsigned alignment, bool isVolatile)
{
if (x.isghost) {
// this can happen when a branch yielding a different type ends
// up being dead code, and type inference knows that the other
// branch's type is the only one that matters.
return;
}
if (!x.ispointer()) { // already unboxed, but sometimes need conversion (e.g. f32 -> i32)
assert(x.V);
Value *unboxed = zext_struct(ctx, x.V);
Type *dest_ty = unboxed->getType()->getPointerTo();
if (dest->getType() != dest_ty)
dest = emit_bitcast(ctx, dest, dest_ty);
StoreInst *store = ctx.builder.CreateAlignedStore(unboxed, dest, Align(alignment));
store->setVolatile(isVolatile);
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, tbaa_dest);
ai.decorateInst(store);
return;
}
Value *src = data_pointer(ctx, x);
emit_memcpy(ctx, dest, jl_aliasinfo_t::fromTBAA(ctx, tbaa_dest), src, jl_aliasinfo_t::fromTBAA(ctx, x.tbaa), jl_datatype_size(x.typ), alignment, julia_alignment(x.typ), isVolatile);
}
static jl_datatype_t *staticeval_bitstype(const jl_cgval_t &targ)
{
// evaluate an argument at compile time to determine what type it is
jl_value_t *unw = jl_unwrap_unionall(targ.typ);
if (jl_is_type_type(unw)) {
jl_value_t *bt = jl_tparam0(unw);
if (jl_is_primitivetype(bt))
return (jl_datatype_t*)bt;
}
return NULL;
}
static jl_cgval_t emit_runtime_call(jl_codectx_t &ctx, JL_I::intrinsic f, const jl_cgval_t *argv, size_t nargs)
{
Function *func = prepare_call(runtime_func()[f]);
SmallVector<Value *, 0> argvalues(nargs);
for (size_t i = 0; i < nargs; ++i) {
argvalues[i] = boxed(ctx, argv[i]);
}
Value *r = ctx.builder.CreateCall(func, argvalues);
return mark_julia_type(ctx, r, true, (jl_value_t*)jl_any_type);
}
// put a bits type tag on some value (despite the name, this doesn't necessarily actually change anything about the value however)
static jl_cgval_t generic_bitcast(jl_codectx_t &ctx, const jl_cgval_t *argv)
{
// Give the arguments names //
const jl_cgval_t &bt_value = argv[0];
const jl_cgval_t &v = argv[1];
jl_datatype_t *bt = staticeval_bitstype(bt_value);
// it's easier to throw a good error from C than llvm
if (!bt)
return emit_runtime_call(ctx, bitcast, argv, 2);
Type *llvmt = bitstype_to_llvm((jl_value_t*)bt, ctx.builder.getContext(), true);
uint32_t nb = jl_datatype_size(bt);
Value *bt_value_rt = NULL;
if (!jl_is_concrete_type((jl_value_t*)bt)) {
bt_value_rt = boxed(ctx, bt_value);
emit_concretecheck(ctx, bt_value_rt, "bitcast: target type not a leaf primitive type");
}
// Examine the second argument //
bool isboxed;
Type *vxt = julia_type_to_llvm(ctx, v.typ, &isboxed);
if (!jl_is_primitivetype(v.typ) || jl_datatype_size(v.typ) != nb) {
Value *typ = emit_typeof(ctx, v, false, false);
if (!jl_is_primitivetype(v.typ)) {
if (jl_is_datatype(v.typ) && !jl_is_abstracttype(v.typ)) {
emit_error(ctx, "bitcast: value not a primitive type");
return jl_cgval_t();
}
else {
Value *isprimitive = emit_datatype_isprimitivetype(ctx, typ);
error_unless(ctx, isprimitive, "bitcast: value not a primitive type");
}
}
if (jl_is_datatype(v.typ) && !jl_is_abstracttype(v.typ)) {
emit_error(ctx, "bitcast: argument size does not match size of target type");
return jl_cgval_t();
}
else {
Value *size = emit_datatype_size(ctx, typ);
auto sizecheck = ctx.builder.CreateICmpEQ(size, ConstantInt::get(size->getType(), nb));
setName(ctx.emission_context, sizecheck, "sizecheck");
error_unless(ctx,
sizecheck,
"bitcast: argument size does not match size of target type");
}
}
assert(!v.isghost);
Value *vx = NULL;
if (!v.ispointer())
vx = v.V;
else if (v.constant)
vx = julia_const_to_llvm(ctx, v.constant);
if (v.ispointer() && vx == NULL) {
// try to load as original Type, to preserve llvm optimizations
// but if the v.typ is not well known, use llvmt
if (isboxed)
vxt = llvmt;
auto storage_type = vxt->isIntegerTy(1) ? getInt8Ty(ctx.builder.getContext()) : vxt;
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, v.tbaa);
vx = ai.decorateInst(ctx.builder.CreateLoad(
storage_type,
emit_bitcast(ctx, data_pointer(ctx, v),
storage_type->getPointerTo())));
setName(ctx.emission_context, vx, "bitcast");
}
vxt = vx->getType();
if (vxt != llvmt) {
if (llvmt->isIntegerTy(1)) {
vx = ctx.builder.CreateTrunc(vx, llvmt);
} else if (vxt->isIntegerTy(1) && llvmt->isIntegerTy(8)) {
vx = ctx.builder.CreateZExt(vx, llvmt);
} else if (vxt->isPointerTy() && !llvmt->isPointerTy()) {
vx = ctx.builder.CreatePtrToInt(vx, llvmt);
setName(ctx.emission_context, vx, "bitcast_coercion");
} else if (!vxt->isPointerTy() && llvmt->isPointerTy()) {
vx = emit_inttoptr(ctx, vx, llvmt);
setName(ctx.emission_context, vx, "bitcast_coercion");
} else {
vx = emit_bitcast(ctx, vx, llvmt);
setName(ctx.emission_context, vx, "bitcast_coercion");
}
}
if (jl_is_concrete_type((jl_value_t*)bt)) {
return mark_julia_type(ctx, vx, false, bt);
}
else {
unsigned align = sizeof(void*); // Allocations are at least pointer aligned
Value *box = emit_allocobj(ctx, nb, bt_value_rt, true, align);
setName(ctx.emission_context, box, "bitcast_box");
init_bits_value(ctx, box, vx, ctx.tbaa().tbaa_immut);
return mark_julia_type(ctx, box, true, bt->name->wrapper);
}
}
static jl_cgval_t generic_cast(
jl_codectx_t &ctx,
intrinsic f, Instruction::CastOps Op,
const jl_cgval_t *argv, bool toint, bool fromint)
{
auto &TT = ctx.emission_context.TargetTriple;
auto &DL = ctx.emission_context.DL;
const jl_cgval_t &targ = argv[0];
const jl_cgval_t &v = argv[1];
jl_datatype_t *jlto = staticeval_bitstype(targ);
if (!jlto || !jl_is_primitivetype(v.typ))
return emit_runtime_call(ctx, f, argv, 2);
uint32_t nb = jl_datatype_size(jlto);
Type *to = bitstype_to_llvm((jl_value_t*)jlto, ctx.builder.getContext(), true);
Type *vt = bitstype_to_llvm(v.typ, ctx.builder.getContext(), true);
if (toint)
to = INTT(to, DL);
else
to = FLOATT(to);
if (fromint)
vt = INTT(vt, DL);
else
vt = FLOATT(vt);
if (!to || !vt)
return emit_runtime_call(ctx, f, argv, 2);
Value *from = emit_unbox(ctx, vt, v, v.typ);
if (!CastInst::castIsValid(Op, from, to))
return emit_runtime_call(ctx, f, argv, 2);
if (Op == Instruction::FPExt) {
if (jl_floattemp_var_needed(TT)) {
// Target platform might carry extra precision.
// Force rounding to single precision first. The reason is that it's
// fine to keep working in extended precision as long as it's
// understood that everything is implicitly rounded to 23 bits,
// but if we start looking at more bits we need to actually do the
// rounding first instead of carrying around incorrect low bits.
Value *jlfloattemp_var = emit_static_alloca(ctx, from->getType());
setName(ctx.emission_context, jlfloattemp_var, "rounding_slot");
ctx.builder.CreateStore(from, jlfloattemp_var);
from = ctx.builder.CreateLoad(from->getType(), jlfloattemp_var, /*force this to load from the stack*/true);
setName(ctx.emission_context, from, "rounded");
}
}
Value *ans = ctx.builder.CreateCast(Op, from, to);
if (f == fptosi || f == fptoui)
ans = ctx.builder.CreateFreeze(ans);
if (jl_is_concrete_type((jl_value_t*)jlto)) {
return mark_julia_type(ctx, ans, false, jlto);
}
else {
Value *targ_rt = boxed(ctx, targ);
emit_concretecheck(ctx, targ_rt, std::string(jl_intrinsic_name(f)) + ": target type not a leaf primitive type");
unsigned align = sizeof(void*); // Allocations are at least pointer aligned
Value *box = emit_allocobj(ctx, nb, targ_rt, true, align);
setName(ctx.emission_context, box, "cast_box");
init_bits_value(ctx, box, ans, ctx.tbaa().tbaa_immut);
return mark_julia_type(ctx, box, true, jlto->name->wrapper);
}
}
static jl_cgval_t emit_runtime_pointerref(jl_codectx_t &ctx, jl_cgval_t *argv)
{
return emit_runtime_call(ctx, pointerref, argv, 3);
}
static jl_cgval_t emit_pointerref(jl_codectx_t &ctx, jl_cgval_t *argv)
{
const jl_cgval_t &e = argv[0];
const jl_cgval_t &i = argv[1];
const jl_cgval_t &align = argv[2];
if (align.constant == NULL || !jl_is_long(align.constant))
return emit_runtime_pointerref(ctx, argv);
unsigned align_nb = jl_unbox_long(align.constant);
if (i.typ != (jl_value_t*)jl_long_type)
return emit_runtime_pointerref(ctx, argv);
jl_value_t *aty = e.typ;
if (!jl_is_cpointer_type(aty))
return emit_runtime_pointerref(ctx, argv);
jl_value_t *ety = jl_tparam0(aty);
if (jl_is_typevar(ety))
return emit_runtime_pointerref(ctx, argv);
if (!is_valid_intrinsic_elptr(ety)) {
emit_error(ctx, "pointerref: invalid pointer type");
return jl_cgval_t();
}
Value *idx = emit_unbox(ctx, ctx.types().T_size, i, (jl_value_t*)jl_long_type);
Value *im1 = ctx.builder.CreateSub(idx, ConstantInt::get(ctx.types().T_size, 1));
setName(ctx.emission_context, im1, "pointerref_idx");
if (ety == (jl_value_t*)jl_any_type) {
Value *thePtr = emit_unbox(ctx, ctx.types().T_pprjlvalue, e, e.typ);
setName(ctx.emission_context, thePtr, "unbox_any_ptr");
LoadInst *load = ctx.builder.CreateAlignedLoad(ctx.types().T_prjlvalue, ctx.builder.CreateInBoundsGEP(ctx.types().T_prjlvalue, thePtr, im1), Align(align_nb));
setName(ctx.emission_context, load, "any_unbox");
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, ctx.tbaa().tbaa_data);
ai.decorateInst(load);
return mark_julia_type(ctx, load, true, ety);
}
else if (!deserves_stack(ety)) {
assert(jl_is_datatype(ety));
uint64_t size = jl_datatype_size(ety);
Value *strct = emit_allocobj(ctx, (jl_datatype_t*)ety, true);
setName(ctx.emission_context, strct, "pointerref_box");
im1 = ctx.builder.CreateMul(im1, ConstantInt::get(ctx.types().T_size,
LLT_ALIGN(size, jl_datatype_align(ety))));
setName(ctx.emission_context, im1, "pointerref_offset");
Value *thePtr = emit_unbox(ctx, getInt8PtrTy(ctx.builder.getContext()), e, e.typ);
thePtr = ctx.builder.CreateInBoundsGEP(getInt8Ty(ctx.builder.getContext()), emit_bitcast(ctx, thePtr, getInt8PtrTy(ctx.builder.getContext())), im1);
setName(ctx.emission_context, thePtr, "pointerref_src");
MDNode *tbaa = best_tbaa(ctx.tbaa(), ety);
emit_memcpy(ctx, strct, jl_aliasinfo_t::fromTBAA(ctx, tbaa), thePtr, jl_aliasinfo_t::fromTBAA(ctx, nullptr), size, sizeof(jl_value_t*), align_nb);
return mark_julia_type(ctx, strct, true, ety);
}
else {
bool isboxed;
Type *ptrty = julia_type_to_llvm(ctx, ety, &isboxed);
assert(!isboxed);
if (!type_is_ghost(ptrty)) {
Value *thePtr = emit_unbox(ctx, ptrty->getPointerTo(), e, e.typ);
auto load = typed_load(ctx, thePtr, im1, ety, ctx.tbaa().tbaa_data, nullptr, isboxed, AtomicOrdering::NotAtomic, false, align_nb);
setName(ctx.emission_context, load.V, "pointerref");
return load;
}
else {
return ghostValue(ctx, ety);
}
}
}
static jl_cgval_t emit_runtime_pointerset(jl_codectx_t &ctx, jl_cgval_t *argv)
{
return emit_runtime_call(ctx, pointerset, argv, 4);
}
// e[i] = x
static jl_cgval_t emit_pointerset(jl_codectx_t &ctx, jl_cgval_t *argv)
{
const jl_cgval_t &e = argv[0];
const jl_cgval_t &x = argv[1];
const jl_cgval_t &i = argv[2];
const jl_cgval_t &align = argv[3];
if (align.constant == NULL || !jl_is_long(align.constant))
return emit_runtime_pointerset(ctx, argv);
unsigned align_nb = jl_unbox_long(align.constant);
if (i.typ != (jl_value_t*)jl_long_type)
return emit_runtime_pointerset(ctx, argv);
jl_value_t *aty = e.typ;
if (!jl_is_cpointer_type(aty))
return emit_runtime_pointerset(ctx, argv);
jl_value_t *ety = jl_tparam0(aty);
if (jl_is_typevar(ety))
return emit_runtime_pointerset(ctx, argv);
if (align.constant == NULL || !jl_is_long(align.constant))
return emit_runtime_pointerset(ctx, argv);
if (!is_valid_intrinsic_elptr(ety)) {
emit_error(ctx, "pointerset: invalid pointer type");
return jl_cgval_t();
}
emit_typecheck(ctx, x, ety, "pointerset");
Value *idx = emit_unbox(ctx, ctx.types().T_size, i, (jl_value_t*)jl_long_type);
Value *im1 = ctx.builder.CreateSub(idx, ConstantInt::get(ctx.types().T_size, 1));
setName(ctx.emission_context, im1, "pointerset_idx");
Value *thePtr;
if (ety == (jl_value_t*)jl_any_type) {
// unsafe_store to Ptr{Any} is allowed to implicitly drop GC roots.
thePtr = emit_unbox(ctx, ctx.types().T_size->getPointerTo(), e, e.typ);
auto gep = ctx.builder.CreateInBoundsGEP(ctx.types().T_size, thePtr, im1);
setName(ctx.emission_context, gep, "pointerset_ptr");
auto val = ctx.builder.CreatePtrToInt(emit_pointer_from_objref(ctx, boxed(ctx, x)), ctx.types().T_size);
setName(ctx.emission_context, val, "pointerset_val");
Instruction *store = ctx.builder.CreateAlignedStore(val, gep, Align(align_nb));
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, ctx.tbaa().tbaa_data);
ai.decorateInst(store);
}
else if (x.ispointer()) {
thePtr = emit_unbox(ctx, getInt8PtrTy(ctx.builder.getContext()), e, e.typ);
uint64_t size = jl_datatype_size(ety);
im1 = ctx.builder.CreateMul(im1, ConstantInt::get(ctx.types().T_size,
LLT_ALIGN(size, jl_datatype_align(ety))));
setName(ctx.emission_context, im1, "pointerset_offset");
auto gep = ctx.builder.CreateInBoundsGEP(getInt8Ty(ctx.builder.getContext()), thePtr, im1);
setName(ctx.emission_context, gep, "pointerset_ptr");
emit_memcpy(ctx, gep, jl_aliasinfo_t::fromTBAA(ctx, nullptr), x, size, align_nb, julia_alignment(ety));
}
else {
bool isboxed;
Type *ptrty = julia_type_to_llvm(ctx, ety, &isboxed);
assert(!isboxed);
if (!type_is_ghost(ptrty)) {
thePtr = emit_unbox(ctx, ptrty->getPointerTo(), e, e.typ);
typed_store(ctx, thePtr, im1, x, jl_cgval_t(), ety, ctx.tbaa().tbaa_data, nullptr, nullptr, isboxed,
AtomicOrdering::NotAtomic, AtomicOrdering::NotAtomic, align_nb, false, true, false, false, false, false, nullptr, "");
}
}
return e;
}
static jl_cgval_t emit_atomicfence(jl_codectx_t &ctx, jl_cgval_t *argv)
{
const jl_cgval_t &ord = argv[0];
if (ord.constant && jl_is_symbol(ord.constant)) {
enum jl_memory_order order = jl_get_atomic_order((jl_sym_t*)ord.constant, true, true);
if (order == jl_memory_order_invalid) {
emit_atomic_error(ctx, "invalid atomic ordering");
return jl_cgval_t(); // unreachable
}
if (order > jl_memory_order_monotonic)
ctx.builder.CreateFence(get_llvm_atomic_order(order));
return ghostValue(ctx, jl_nothing_type);
}
return emit_runtime_call(ctx, atomic_fence, argv, 1);
}
static jl_cgval_t emit_atomic_pointerref(jl_codectx_t &ctx, jl_cgval_t *argv)
{
const jl_cgval_t &e = argv[0];
const jl_cgval_t &ord = argv[1];
jl_value_t *aty = e.typ;
if (!jl_is_cpointer_type(aty) || !ord.constant || !jl_is_symbol(ord.constant))
return emit_runtime_call(ctx, atomic_pointerref, argv, 2);
jl_value_t *ety = jl_tparam0(aty);
if (jl_is_typevar(ety))
return emit_runtime_call(ctx, atomic_pointerref, argv, 2);
enum jl_memory_order order = jl_get_atomic_order((jl_sym_t*)ord.constant, true, false);
if (order == jl_memory_order_invalid) {
emit_atomic_error(ctx, "invalid atomic ordering");
return jl_cgval_t(); // unreachable
}
AtomicOrdering llvm_order = get_llvm_atomic_order(order);
if (ety == (jl_value_t*)jl_any_type) {
Value *thePtr = emit_unbox(ctx, ctx.types().T_pprjlvalue, e, e.typ);
LoadInst *load = ctx.builder.CreateAlignedLoad(ctx.types().T_prjlvalue, thePtr, Align(sizeof(jl_value_t*)));
setName(ctx.emission_context, load, "atomic_pointerref");
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, ctx.tbaa().tbaa_data);
ai.decorateInst(load);
load->setOrdering(llvm_order);
return mark_julia_type(ctx, load, true, ety);
}
if (!is_valid_intrinsic_elptr(ety)) {
emit_error(ctx, "atomic_pointerref: invalid pointer type");
return jl_cgval_t();
}
size_t nb = jl_datatype_size(ety);
if ((nb & (nb - 1)) != 0 || nb > MAX_POINTERATOMIC_SIZE) {
emit_error(ctx, "atomic_pointerref: invalid pointer for atomic operation");
return jl_cgval_t();
}
if (!deserves_stack(ety)) {
assert(jl_is_datatype(ety));
Value *strct = emit_allocobj(ctx, (jl_datatype_t*)ety, true);
setName(ctx.emission_context, strct, "atomic_pointerref_box");
Value *thePtr = emit_unbox(ctx, getInt8PtrTy(ctx.builder.getContext()), e, e.typ);
Type *loadT = Type::getIntNTy(ctx.builder.getContext(), nb * 8);
thePtr = emit_bitcast(ctx, thePtr, loadT->getPointerTo());
MDNode *tbaa = best_tbaa(ctx.tbaa(), ety);
LoadInst *load = ctx.builder.CreateAlignedLoad(loadT, thePtr, Align(nb));
setName(ctx.emission_context, load, "atomic_pointerref");
jl_aliasinfo_t ai = jl_aliasinfo_t::fromTBAA(ctx, tbaa);
ai.decorateInst(load);
load->setOrdering(llvm_order);
thePtr = emit_bitcast(ctx, strct, thePtr->getType());
StoreInst *store = ctx.builder.CreateAlignedStore(load, thePtr, Align(julia_alignment(ety)));
ai.decorateInst(store);
return mark_julia_type(ctx, strct, true, ety);
}
else {
bool isboxed;
Type *ptrty = julia_type_to_llvm(ctx, ety, &isboxed);
assert(!isboxed);
if (!type_is_ghost(ptrty)) {
Value *thePtr = emit_unbox(ctx, ptrty->getPointerTo(), e, e.typ);
auto load = typed_load(ctx, thePtr, nullptr, ety, ctx.tbaa().tbaa_data, nullptr, isboxed, llvm_order, false, nb);
setName(ctx.emission_context, load.V, "atomic_pointerref");
return load;
}
else {
if (order > jl_memory_order_monotonic)
ctx.builder.CreateFence(llvm_order);
return ghostValue(ctx, ety);
}
}
}
// e[i] = x (set)
// e[i] <= x (swap)
// e[i] y => x (replace)
// x(e[i], y) (modify)
static jl_cgval_t emit_atomic_pointerop(jl_codectx_t &ctx, intrinsic f, const jl_cgval_t *argv, int nargs, const jl_cgval_t *modifyop)
{
bool issetfield = f == atomic_pointerset;
bool isreplacefield = f == atomic_pointerreplace;
bool isswapfield = f == atomic_pointerswap;
bool ismodifyfield = f == atomic_pointermodify;
const jl_cgval_t undefval;
const jl_cgval_t &e = argv[0];
const jl_cgval_t &x = isreplacefield || ismodifyfield ? argv[2] : argv[1];
const jl_cgval_t &y = isreplacefield || ismodifyfield ? argv[1] : undefval;
const jl_cgval_t &ord = isreplacefield || ismodifyfield ? argv[3] : argv[2];
const jl_cgval_t &failord = isreplacefield ? argv[4] : undefval;
jl_value_t *aty = e.typ;
if (!jl_is_cpointer_type(aty) || !ord.constant || !jl_is_symbol(ord.constant))
return emit_runtime_call(ctx, f, argv, nargs);
if (isreplacefield) {
if (!failord.constant || !jl_is_symbol(failord.constant))
return emit_runtime_call(ctx, f, argv, nargs);
}
jl_value_t *ety = jl_tparam0(aty);
if (jl_is_typevar(ety))
return emit_runtime_call(ctx, f, argv, nargs);
enum jl_memory_order order = jl_get_atomic_order((jl_sym_t*)ord.constant, !issetfield, true);
enum jl_memory_order failorder = isreplacefield ? jl_get_atomic_order((jl_sym_t*)failord.constant, true, false) : order;
if (order == jl_memory_order_invalid || failorder == jl_memory_order_invalid || failorder > order) {
emit_atomic_error(ctx, "invalid atomic ordering");
return jl_cgval_t(); // unreachable
}
AtomicOrdering llvm_order = get_llvm_atomic_order(order);
AtomicOrdering llvm_failorder = get_llvm_atomic_order(failorder);
if (ety == (jl_value_t*)jl_any_type) {
// unsafe_store to Ptr{Any} is allowed to implicitly drop GC roots.
// n.b.: the expected value (y) must be rooted, but not the others
Value *thePtr = emit_unbox(ctx, ctx.types().T_pprjlvalue, e, e.typ);
bool isboxed = true;
jl_cgval_t ret = typed_store(ctx, thePtr, nullptr, x, y, ety, ctx.tbaa().tbaa_data, nullptr, nullptr, isboxed,
llvm_order, llvm_failorder, sizeof(jl_value_t*), false, issetfield, isreplacefield, isswapfield, ismodifyfield, false, modifyop, "atomic_pointermodify");
if (issetfield)
ret = e;
return ret;
}
if (!is_valid_intrinsic_elptr(ety)) {
std::string msg(StringRef(jl_intrinsic_name((int)f)));
msg += ": invalid pointer type";
emit_error(ctx, msg);
return jl_cgval_t();
}
if (!ismodifyfield)
emit_typecheck(ctx, x, ety, std::string(jl_intrinsic_name((int)f)));