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intrinsics.cpp
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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"
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); }
static JuliaFunction *runtime_func[num_intrinsics] = {
#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
};
static bool float_func[num_intrinsics];
static void jl_init_intrinsic_functions_codegen(void)
{
#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
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[rem_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[rem_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;
}
extern "C"
JL_DLLEXPORT 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)
{
auto &ctxt = t->getContext();
if (t->isIntegerTy())
return t;
if (t->isPointerTy())
return getSizeTy(ctxt);
if (t == getDoubleTy(ctxt))
return getInt64Ty(ctxt);
if (t == getFloatTy(ctxt))
return getInt32Ty(ctxt);
if (t == getHalfTy(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)
{
Type *t = x->getType();
if (t == to)
return x;
if (to->getPrimitiveSizeInBits() < x->getType()->getPrimitiveSizeInBits())
return ctx.builder.CreateTrunc(x, to);
return ctx.builder.CreateZExt(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);
std::vector<Constant*> 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);
fsz = jl_field_size(bt, i);
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 Value *emit_unboxed_coercion(jl_codectx_t &ctx, Type *to, Value *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 == getInt1Ty(ctx.builder.getContext()) && to == getInt8Ty(ctx.builder.getContext())) {
// bools may be stored internally as int8
unboxed = ctx.builder.CreateZExt(unboxed, getInt8Ty(ctx.builder.getContext()));
}
else if (ty == getInt8Ty(ctx.builder.getContext()) && to == getInt1Ty(ctx.builder.getContext())) {
// bools may be stored internally as int8
unboxed = ctx.builder.CreateTrunc(unboxed, getInt1Ty(ctx.builder.getContext()));
}
else if (ty == getVoidTy(ctx.builder.getContext()) || DL.getTypeSizeInBits(ty) != DL.getTypeSizeInBits(to)) {
// this can happen in dead code
//emit_unreachable(ctx);
return UndefValue::get(to);
}
if (frompointer && topointer) {
unboxed = emit_bitcast(ctx, unboxed, to);
}
else if (!ty->isIntOrPtrTy() && !ty->isFloatingPointTy()) {
#ifndef JL_NDEBUG
const DataLayout &DL = jl_Module->getDataLayout();
#endif
assert(DL.getTypeSizeInBits(ty) == DL.getTypeSizeInBits(to));
AllocaInst *cast = ctx.builder.CreateAlloca(ty);
ctx.builder.CreateStore(unboxed, cast);
unboxed = ctx.builder.CreateLoad(to, ctx.builder.CreateBitCast(cast, to->getPointerTo()));
}
else if (frompointer) {
Type *INTT_to = INTT(to);
unboxed = ctx.builder.CreatePtrToInt(unboxed, INTT_to);
if (INTT_to != to)
unboxed = ctx.builder.CreateBitCast(unboxed, to);
}
else if (topointer) {
Type *INTT_to = INTT(to);
if (to != INTT_to)
unboxed = ctx.builder.CreateBitCast(unboxed, INTT_to);
unboxed = emit_inttoptr(ctx, unboxed, to);
}
else {
unboxed = ctx.builder.CreateBitCast(unboxed, to);
}
return unboxed;
}
// emit code to unpack a raw value from a box into registers or a stack slot
static Value *emit_unbox(jl_codectx_t &ctx, Type *to, const jl_cgval_t &x, jl_value_t *jt, Value *dest, MDNode *tbaa_dest, bool isVolatile)
{
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;
}
//emit_unreachable(ctx);
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;
if (!dest)
return emit_unboxed_coercion(ctx, to, unboxed);
Type *dest_ty = unboxed->getType()->getPointerTo();
if (dest->getType() != dest_ty)
dest = emit_bitcast(ctx, dest, dest_ty);
tbaa_decorate(tbaa_dest, ctx.builder.CreateAlignedStore(unboxed, dest, Align(julia_alignment(jt))));
return NULL;
}
// 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 == getInt1Ty(ctx.builder.getContext())) {
Instruction *unbox_load = tbaa_decorate(x.tbaa, ctx.builder.CreateLoad(getInt8Ty(ctx.builder.getContext()), maybe_bitcast(ctx, p, getInt8PtrTy(ctx.builder.getContext()))));
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 == getInt1Ty(ctx.builder.getContext()))
unboxed = ctx.builder.CreateTrunc(unbox_load, getInt1Ty(ctx.builder.getContext()));
else
unboxed = unbox_load; // `to` must be getInt8Ty(ctx.builder.getContext())
if (!dest)
return unboxed;
Type *dest_ty = unboxed->getType()->getPointerTo();
if (dest->getType() != dest_ty)
dest = emit_bitcast(ctx, dest, dest_ty);
tbaa_decorate(tbaa_dest, ctx.builder.CreateStore(unboxed, dest));
return NULL;
}
unsigned alignment = julia_alignment(jt);
Type *ptype = to->getPointerTo();
if (dest) {
emit_memcpy(ctx, dest, tbaa_dest, p, x.tbaa, jl_datatype_size(jt), alignment, false);
return NULL;
}
else {
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));
return emit_unboxed_coercion(ctx, to, tbaa_decorate(x.tbaa, load));
}
}
p = maybe_bitcast(ctx, p, ptype);
Instruction *load = ctx.builder.CreateAlignedLoad(to, p, Align(alignment));
return tbaa_decorate(x.tbaa, load);
}
}
static jl_value_t *staticeval_bitstype(const jl_cgval_t &targ)
{
// evaluate an argument at compile time to determine what type it is
if (jl_is_type_type(targ.typ)) {
jl_value_t *bt = jl_tparam0(targ.typ);
if (jl_is_primitivetype(bt))
return 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]);
Value **argvalues = (Value**)alloca(sizeof(Value*) * nargs);
for (size_t i = 0; i < nargs; ++i) {
argvalues[i] = boxed(ctx, argv[i]);
}
Value *r = ctx.builder.CreateCall(func, makeArrayRef(argvalues, nargs));
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_value_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(bt, ctx.builder.getContext());
int nb = jl_datatype_size(bt);
// 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_boxed(ctx, v);
if (!jl_is_primitivetype(v.typ)) {
if (isboxed) {
Value *isprimitive = emit_datatype_isprimitivetype(ctx, typ);
error_unless(ctx, isprimitive, "bitcast: expected primitive type value for second argument");
}
else {
emit_error(ctx, "bitcast: expected primitive type value for second argument");
return jl_cgval_t(ctx.builder.getContext());
}
}
if (!jl_is_datatype(v.typ) || jl_datatype_size(v.typ) != nb) {
if (isboxed) {
Value *size = emit_datatype_size(ctx, typ);
error_unless(ctx,
ctx.builder.CreateICmpEQ(size, ConstantInt::get(getInt32Ty(ctx.builder.getContext()), nb)),
"bitcast: argument size does not match size of target type");
}
else {
emit_error(ctx, "bitcast: argument size does not match size of target type");
return jl_cgval_t(ctx.builder.getContext());
}
}
}
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 == getInt1Ty(ctx.builder.getContext()) ? getInt8Ty(ctx.builder.getContext()) : vxt;
vx = tbaa_decorate(v.tbaa, ctx.builder.CreateLoad(
storage_type,
emit_bitcast(ctx, data_pointer(ctx, v),
storage_type->getPointerTo())));
}
vxt = vx->getType();
if (vxt != llvmt) {
if (llvmt == getInt1Ty(ctx.builder.getContext()))
vx = ctx.builder.CreateTrunc(vx, llvmt);
else if (vxt == getInt1Ty(ctx.builder.getContext()) && llvmt == getInt8Ty(ctx.builder.getContext()))
vx = ctx.builder.CreateZExt(vx, llvmt);
else if (vxt->isPointerTy() && !llvmt->isPointerTy())
vx = ctx.builder.CreatePtrToInt(vx, llvmt);
else if (!vxt->isPointerTy() && llvmt->isPointerTy())
vx = emit_inttoptr(ctx, vx, llvmt);
else
vx = emit_bitcast(ctx, vx, llvmt);
}
if (jl_is_concrete_type(bt)) {
return mark_julia_type(ctx, vx, false, bt);
}
else {
Value *box = emit_allocobj(ctx, nb, boxed(ctx, bt_value));
init_bits_value(ctx, box, vx, ctx.tbaa().tbaa_immut);
return mark_julia_type(ctx, box, true, bt);
}
}
static jl_cgval_t generic_cast(
jl_codectx_t &ctx,
intrinsic f, Instruction::CastOps Op,
const jl_cgval_t *argv, bool toint, bool fromint)
{
const jl_cgval_t &targ = argv[0];
const jl_cgval_t &v = argv[1];
jl_value_t *jlto = staticeval_bitstype(targ);
if (!jlto || !jl_is_primitivetype(v.typ))
return emit_runtime_call(ctx, f, argv, 2);
Type *to = bitstype_to_llvm(jlto, ctx.builder.getContext());
Type *vt = bitstype_to_llvm(v.typ, ctx.builder.getContext());
if (toint)
to = INTT(to);
else
to = FLOATT(to);
if (fromint)
vt = INTT(vt);
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) {
#ifdef JL_NEED_FLOATTEMP_VAR
// 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());
ctx.builder.CreateStore(from, jlfloattemp_var);
from = ctx.builder.CreateLoad(jlfloattemp_var, /*force this to load from the stack*/true);
#endif
}
Value *ans = ctx.builder.CreateCast(Op, from, to);
if (f == fptosi || f == fptoui)
ans = ctx.builder.CreateFreeze(ans);
return mark_julia_type(ctx, ans, false, jlto);
}
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(ctx.builder.getContext());
}
Value *idx = emit_unbox(ctx, getSizeTy(ctx.builder.getContext()), i, (jl_value_t*)jl_long_type);
Value *im1 = ctx.builder.CreateSub(idx, ConstantInt::get(getSizeTy(ctx.builder.getContext()), 1));
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, ctx.builder.CreateInBoundsGEP(ctx.types().T_prjlvalue, thePtr, im1), Align(align_nb));
tbaa_decorate(ctx.tbaa().tbaa_data, load);
return mark_julia_type(ctx, load, true, ety);
}
else if (!jl_isbits(ety)) {
assert(jl_is_datatype(ety));
uint64_t size = jl_datatype_size(ety);
Value *strct = emit_allocobj(ctx, size,
literal_pointer_val(ctx, ety));
im1 = ctx.builder.CreateMul(im1, ConstantInt::get(getSizeTy(ctx.builder.getContext()),
LLT_ALIGN(size, jl_datatype_align(ety))));
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);
MDNode *tbaa = best_tbaa(ctx.tbaa(), ety);
emit_memcpy(ctx, strct, tbaa, thePtr, nullptr, size, 1);
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);
return typed_load(ctx, thePtr, im1, ety, ctx.tbaa().tbaa_data, nullptr, isboxed, AtomicOrdering::NotAtomic, true, align_nb);
}
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(ctx.builder.getContext());
}
emit_typecheck(ctx, x, ety, "pointerset");
Value *idx = emit_unbox(ctx, getSizeTy(ctx.builder.getContext()), i, (jl_value_t*)jl_long_type);
Value *im1 = ctx.builder.CreateSub(idx, ConstantInt::get(getSizeTy(ctx.builder.getContext()), 1));
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, getSizePtrTy(ctx.builder.getContext()), e, e.typ);
Instruction *store = ctx.builder.CreateAlignedStore(
ctx.builder.CreatePtrToInt(emit_pointer_from_objref(ctx, boxed(ctx, x)), getSizeTy(ctx.builder.getContext())),
ctx.builder.CreateInBoundsGEP(getSizeTy(ctx.builder.getContext()), thePtr, im1), Align(align_nb));
tbaa_decorate(ctx.tbaa().tbaa_data, store);
}
else if (!jl_isbits(ety)) {
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(getSizeTy(ctx.builder.getContext()),
LLT_ALIGN(size, jl_datatype_align(ety))));
emit_memcpy(ctx, ctx.builder.CreateInBoundsGEP(getInt8Ty(ctx.builder.getContext()), thePtr, im1), nullptr, x, size, align_nb);
}
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(ctx.builder.getContext()), 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(ctx.builder.getContext()); // 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(ctx.builder.getContext()); // 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*)));
tbaa_decorate(ctx.tbaa().tbaa_data, 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(ctx.builder.getContext());
}
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(ctx.builder.getContext());
}
if (!jl_isbits(ety)) {
assert(jl_is_datatype(ety));
uint64_t size = jl_datatype_size(ety);
Value *strct = emit_allocobj(ctx, size,
literal_pointer_val(ctx, ety));
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));
tbaa_decorate(tbaa, load);
load->setOrdering(llvm_order);
thePtr = emit_bitcast(ctx, strct, thePtr->getType());
StoreInst *store = ctx.builder.CreateAlignedStore(load, thePtr, Align(julia_alignment(ety)));
tbaa_decorate(tbaa, 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);
return typed_load(ctx, thePtr, nullptr, ety, ctx.tbaa().tbaa_data, nullptr, isboxed, llvm_order, true, nb);
}
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(ctx.builder.getContext());
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(ctx.builder.getContext()); // 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(ctx.builder.getContext());
}
if (!ismodifyfield)
emit_typecheck(ctx, x, ety, std::string(jl_intrinsic_name((int)f)));
size_t nb = jl_datatype_size(ety);
if ((nb & (nb - 1)) != 0 || nb > MAX_POINTERATOMIC_SIZE) {
std::string msg(StringRef(jl_intrinsic_name((int)f)));
msg += ": invalid pointer for atomic operation";
emit_error(ctx, msg);
return jl_cgval_t(ctx.builder.getContext());
}
if (!jl_isbits(ety)) {
//Value *thePtr = emit_unbox(ctx, getInt8PtrTy(ctx.builder.getContext()), e, e.typ);
//uint64_t size = jl_datatype_size(ety);
return emit_runtime_call(ctx, f, argv, nargs); // TODO: optimizations
}
else {
bool isboxed;
Type *ptrty = julia_type_to_llvm(ctx, ety, &isboxed);
assert(!isboxed);
Value *thePtr = emit_unbox(ctx, ptrty->getPointerTo(), e, e.typ);
jl_cgval_t ret = typed_store(ctx, thePtr, nullptr, x, y, ety, ctx.tbaa().tbaa_data, nullptr, nullptr, isboxed,
llvm_order, llvm_failorder, nb, false, issetfield, isreplacefield, isswapfield, ismodifyfield, false, modifyop, "atomic_pointermodify");
if (issetfield)
ret = e;
return ret;
}
}
static Value *emit_checked_srem_int(jl_codectx_t &ctx, Value *x, Value *den)
{
Type *t = den->getType();
raise_exception_unless(ctx,
ctx.builder.CreateICmpNE(den, ConstantInt::get(t, 0)),
literal_pointer_val(ctx, jl_diverror_exception));
BasicBlock *m1BB = BasicBlock::Create(ctx.builder.getContext(), "minus1", ctx.f);
BasicBlock *okBB = BasicBlock::Create(ctx.builder.getContext(), "oksrem", ctx.f);
BasicBlock *cont = BasicBlock::Create(ctx.builder.getContext(), "after_srem", ctx.f);
PHINode *ret = PHINode::Create(t, 2);
ctx.builder.CreateCondBr(ctx.builder.CreateICmpEQ(den ,ConstantInt::get(t, -1, true)),
m1BB, okBB);
ctx.builder.SetInsertPoint(m1BB);
ctx.builder.CreateBr(cont);
ctx.builder.SetInsertPoint(okBB);
Value *sremval = ctx.builder.CreateSRem(x, den);
ctx.builder.CreateBr(cont);
ctx.builder.SetInsertPoint(cont);
ret->addIncoming(// rem(typemin, -1) is undefined
ConstantInt::get(t, 0), m1BB);
ret->addIncoming(sremval, okBB);
ctx.builder.Insert(ret);
return ret;
}
// Temporarily switch the ctx.builder to fast-math mode if requested
struct math_builder {
IRBuilder<> &ctxbuilder;
FastMathFlags old_fmf;
math_builder(jl_codectx_t &ctx, bool always_fast = false, bool contract = false)
: ctxbuilder(ctx.builder),
old_fmf(ctxbuilder.getFastMathFlags())
{
FastMathFlags fmf;
if (jl_options.fast_math != JL_OPTIONS_FAST_MATH_OFF &&
(always_fast ||
jl_options.fast_math == JL_OPTIONS_FAST_MATH_ON)) {
fmf.setFast();
}
if (contract)
fmf.setAllowContract(true);
ctxbuilder.setFastMathFlags(fmf);
}
IRBuilder<>& operator()() const { return ctxbuilder; }
~math_builder() {
ctxbuilder.setFastMathFlags(old_fmf);
}
};
static Value *emit_untyped_intrinsic(jl_codectx_t &ctx, intrinsic f, Value **argvalues, size_t nargs,
jl_datatype_t **newtyp, jl_value_t *xtyp);
static jl_cgval_t emit_ifelse(jl_codectx_t &ctx, jl_cgval_t c, jl_cgval_t x, jl_cgval_t y, jl_value_t *rt_hint)
{
Value *isfalse = emit_condition(ctx, c, "ifelse");
jl_value_t *t1 = x.typ;
jl_value_t *t2 = y.typ;
// handle cases where the condition is irrelevant based on type info
if (t1 == jl_bottom_type && t2 == jl_bottom_type)
return jl_cgval_t(ctx.builder.getContext()); // undefined
if (t1 == jl_bottom_type)
return y;
if (t2 == jl_bottom_type)
return x;
if (t1 != t2) {
// type inference may know something we don't, in which case it may
// be illegal for us to convert to rt_hint. Check first if either
// of the types have empty intersection with the result type,
// in which case, we may use the other one.
if (jl_type_intersection(t1, rt_hint) == jl_bottom_type)
return y;
else if (jl_type_intersection(t2, rt_hint) == jl_bottom_type)
return x;
// if they aren't the same type, consider using the expr type
// to instantiate a union-split optimization
x = convert_julia_type(ctx, x, rt_hint);
y = convert_julia_type(ctx, y, rt_hint);
t1 = x.typ;
t2 = y.typ;
}
Value *ifelse_result;
bool isboxed = t1 != t2 || !deserves_stack(t1);
Type *llt1 = isboxed ? ctx.types().T_prjlvalue : julia_type_to_llvm(ctx, t1);
if (!isboxed) {
if (type_is_ghost(llt1))
return x;
ifelse_result = ctx.builder.CreateSelect(isfalse,
emit_unbox(ctx, llt1, y, t1),
emit_unbox(ctx, llt1, x, t1));
}
else {
Value *x_tindex = x.TIndex;
Value *y_tindex = y.TIndex;
if (x_tindex || y_tindex) {
if (!x.isghost)
x = value_to_pointer(ctx, x);
if (!y.isghost)
y = value_to_pointer(ctx, y);
Value *x_vboxed = x.Vboxed;
Value *y_vboxed = y.Vboxed;
Value *x_ptr = (x.isghost ? NULL : data_pointer(ctx, x));
Value *y_ptr = (y.isghost ? NULL : data_pointer(ctx, y));
MDNode *ifelse_tbaa;
if (!x.isghost && x.constant)
x_vboxed = boxed(ctx, x);
if (!y.isghost && y.constant)
y_vboxed = boxed(ctx, y);
if (!x_ptr && !y_ptr) { // both ghost
ifelse_result = NULL;
ifelse_tbaa = ctx.tbaa().tbaa_stack;
}
else if (!x_ptr) {
ifelse_result = y_ptr;
ifelse_tbaa = y.tbaa;
}
else if (!y_ptr) {
ifelse_result = x_ptr;
ifelse_tbaa = x.tbaa;
}
else {
x_ptr = decay_derived(ctx, x_ptr);
y_ptr = decay_derived(ctx, y_ptr);
if (x_ptr->getType() != y_ptr->getType())
y_ptr = ctx.builder.CreateBitCast(y_ptr, x_ptr->getType());
ifelse_result = ctx.builder.CreateSelect(isfalse, y_ptr, x_ptr);
ifelse_tbaa = MDNode::getMostGenericTBAA(x.tbaa, y.tbaa);
if (ifelse_tbaa == NULL) {
// LLVM won't return a TBAA result for the root, but mark_julia_struct requires it: make it now
auto *OffsetNode = ConstantAsMetadata::get(ConstantInt::get(getInt64Ty(ctx.builder.getContext()), 0));
Metadata *Ops[] = {ctx.tbaa().tbaa_root, ctx.tbaa().tbaa_root, OffsetNode};
ifelse_tbaa = MDNode::get(ctx.builder.getContext(), Ops);
}
}
Value *tindex;