https://github.com/halide/Halide
Tip revision: 1fd83c92b9eda2037772084e5dd14ea02950c299 authored by Pranav Bhandarkar on 10 August 2018, 23:44:17 UTC
Spooky action inside CodeGen_LLVM.cpp
Spooky action inside CodeGen_LLVM.cpp
Tip revision: 1fd83c9
Parameter.cpp
#include "IR.h"
#include "IROperator.h"
#include "ObjectInstanceRegistry.h"
#include "Parameter.h"
#include "Simplify.h"
namespace Halide {
namespace Internal {
struct ParameterContents {
mutable RefCount ref_count;
const Type type;
const int dimensions;
const std::string name;
const std::string handle_type;
Buffer<> buffer;
uint64_t data;
int host_alignment;
std::vector<Expr> min_constraint;
std::vector<Expr> extent_constraint;
std::vector<Expr> stride_constraint;
std::vector<Expr> min_constraint_estimate;
std::vector<Expr> extent_constraint_estimate;
Expr min_value, max_value;
Expr estimate;
const bool is_buffer;
const bool is_explicit_name;
ParameterContents(Type t, bool b, int d, const std::string &n, bool e)
: type(t), dimensions(d), name(n), buffer(Buffer<>()), data(0),
host_alignment(t.bytes()), is_buffer(b), is_explicit_name(e) {
min_constraint.resize(dimensions);
extent_constraint.resize(dimensions);
stride_constraint.resize(dimensions);
min_constraint_estimate.resize(dimensions);
extent_constraint_estimate.resize(dimensions);
// stride_constraint[0] defaults to 1. This is important for
// dense vectorization. You can unset it by setting it to a
// null expression. (param.set_stride(0, Expr());)
if (dimensions > 0) {
stride_constraint[0] = 1;
}
}
};
template<>
RefCount &ref_count<Halide::Internal::ParameterContents>(const ParameterContents *p) {return p->ref_count;}
template<>
void destroy<Halide::Internal::ParameterContents>(const ParameterContents *p) {delete p;}
void Parameter::check_defined() const {
user_assert(defined()) << "Parameter is undefined\n";
}
void Parameter::check_is_buffer() const {
check_defined();
user_assert(contents->is_buffer) << "Parameter " << name() << " is not a Buffer\n";
}
void Parameter::check_is_scalar() const {
check_defined();
user_assert(!contents->is_buffer) << "Parameter " << name() << " is a Buffer\n";
}
void Parameter::check_dim_ok(int dim) const {
user_assert(dim >= 0 && dim < dimensions())
<< "Dimension " << dim << " is not in the range [0, " << dimensions() - 1 << "]\n";
}
Parameter::Parameter(Type t, bool is_buffer, int d) :
contents(new ParameterContents(t, is_buffer, d, unique_name('p'), false)) {
internal_assert(is_buffer || d == 0) << "Scalar parameters should be zero-dimensional";
}
Parameter::Parameter(Type t, bool is_buffer, int d, const std::string &name, bool is_explicit_name) :
contents(new ParameterContents(t, is_buffer, d, name, is_explicit_name)) {
internal_assert(is_buffer || d == 0) << "Scalar parameters should be zero-dimensional";
}
Type Parameter::type() const {
check_defined();
return contents->type;
}
int Parameter::dimensions() const {
check_defined();
return contents->dimensions;
}
const std::string &Parameter::name() const {
check_defined();
return contents->name;
}
bool Parameter::is_explicit_name() const {
check_defined();
return contents->is_explicit_name;
}
bool Parameter::is_buffer() const {
check_defined();
return contents->is_buffer;
}
Expr Parameter::scalar_expr() const {
check_is_scalar();
const Type t = type();
if (t.is_float()) {
switch (t.bits()) {
case 16: return Expr(scalar<float16_t>());
case 32: return Expr(scalar<float>());
case 64: return Expr(scalar<double>());
}
} else if (t.is_int()) {
switch (t.bits()) {
case 8: return Expr(scalar<int8_t>());
case 16: return Expr(scalar<int16_t>());
case 32: return Expr(scalar<int32_t>());
case 64: return Expr(scalar<int64_t>());
}
} else if (t.is_uint()) {
switch (t.bits()) {
case 1: return make_bool(scalar<bool>());
case 8: return Expr(scalar<uint8_t>());
case 16: return Expr(scalar<uint16_t>());
case 32: return Expr(scalar<uint32_t>());
case 64: return Expr(scalar<uint64_t>());
}
} else if (t.is_handle()) {
// handles are always uint64 internally.
switch (t.bits()) {
case 64: return Expr(scalar<uint64_t>());
}
}
internal_error << "Unsupported type " << t << " in scalar_expr\n";
return Expr();
}
Buffer<> Parameter::buffer() const {
check_is_buffer();
return contents->buffer;
}
const halide_buffer_t *Parameter::raw_buffer() const {
if (!is_buffer()) return nullptr;
return contents->buffer.raw_buffer();
}
void Parameter::set_buffer(Buffer<> b) {
check_is_buffer();
if (b.defined()) {
user_assert(contents->type == b.type())
<< "Can't bind Parameter " << name()
<< " of type " << contents->type
<< " to Buffer " << b.name()
<< " of type " << Type(b.type()) << "\n";
}
contents->buffer = b;
}
void *Parameter::scalar_address() const {
check_is_scalar();
return &contents->data;
}
/** Tests if this handle is the same as another handle */
bool Parameter::same_as(const Parameter &other) const {
return contents.same_as(other.contents);
}
/** Tests if this handle is non-nullptr */
bool Parameter::defined() const {
return contents.defined();
}
void Parameter::set_min_constraint(int dim, Expr e) {
check_is_buffer();
check_dim_ok(dim);
contents->min_constraint[dim] = e;
}
void Parameter::set_extent_constraint(int dim, Expr e) {
check_is_buffer();
check_dim_ok(dim);
contents->extent_constraint[dim] = e;
}
void Parameter::set_stride_constraint(int dim, Expr e) {
check_is_buffer();
check_dim_ok(dim);
contents->stride_constraint[dim] = e;
}
void Parameter::set_min_constraint_estimate(int dim, Expr min) {
check_is_buffer();
check_dim_ok(dim);
contents->min_constraint_estimate[dim] = min;
}
void Parameter::set_extent_constraint_estimate(int dim, Expr extent) {
check_is_buffer();
check_dim_ok(dim);
contents->extent_constraint_estimate[dim] = extent;
}
void Parameter::set_host_alignment(int bytes) {
check_is_buffer();
contents->host_alignment = bytes;
}
Expr Parameter::min_constraint(int dim) const {
check_is_buffer();
check_dim_ok(dim);
return contents->min_constraint[dim];
}
Expr Parameter::extent_constraint(int dim) const {
check_is_buffer();
check_dim_ok(dim);
return contents->extent_constraint[dim];
}
Expr Parameter::stride_constraint(int dim) const {
check_is_buffer();
check_dim_ok(dim);
return contents->stride_constraint[dim];
}
Expr Parameter::min_constraint_estimate(int dim) const {
check_is_buffer();
check_dim_ok(dim);
return contents->min_constraint_estimate[dim];
}
Expr Parameter::extent_constraint_estimate(int dim) const {
check_is_buffer();
check_dim_ok(dim);
return contents->extent_constraint_estimate[dim];
}
int Parameter::host_alignment() const {
check_is_buffer();
return contents->host_alignment;
}
void Parameter::set_min_value(Expr e) {
check_is_scalar();
if (e.defined()) {
user_assert(e.type() == contents->type)
<< "Can't set parameter " << name()
<< " of type " << contents->type
<< " to have min value " << e
<< " of type " << e.type() << "\n";
}
contents->min_value = e;
}
Expr Parameter::min_value() const {
check_is_scalar();
return contents->min_value;
}
void Parameter::set_max_value(Expr e) {
check_is_scalar();
if (e.defined()) {
user_assert(e.type() == contents->type)
<< "Can't set parameter " << name()
<< " of type " << contents->type
<< " to have max value " << e
<< " of type " << e.type() << "\n";
}
contents->max_value = e;
}
Expr Parameter::max_value() const {
check_is_scalar();
return contents->max_value;
}
void Parameter::set_estimate(Expr e) {
check_is_scalar();
contents->estimate = e;
}
Expr Parameter::estimate() const {
check_is_scalar();
return contents->estimate;
}
void check_call_arg_types(const std::string &name, std::vector<Expr> *args, int dims) {
user_assert(args->size() == (size_t)dims)
<< args->size() << "-argument call to \""
<< name << "\", which has " << dims << " dimensions.\n";
for (size_t i = 0; i < args->size(); i++) {
user_assert((*args)[i].defined())
<< "Argument " << i << " to call to \"" << name << "\" is an undefined Expr\n";
Type t = (*args)[i].type();
if (t.is_float() || (t.is_uint() && t.bits() >= 32) || (t.is_int() && t.bits() > 32)) {
user_error << "Implicit cast from " << t << " to int in argument " << (i+1)
<< " in call to \"" << name << "\" is not allowed. Use an explicit cast.\n";
}
// We're allowed to implicitly cast from other varieties of int
if (t != Int(32)) {
(*args)[i] = Cast::make(Int(32), (*args)[i]);
}
}
}
void RegisteredParameter::register_if_needed() {
if (defined()) {
ObjectInstanceRegistry::register_instance(this, 0, ObjectInstanceRegistry::FilterParam, this, nullptr);
}
}
void RegisteredParameter::unregister_if_needed() {
if (defined()) {
// This will assert-fail if not registered.
ObjectInstanceRegistry::unregister_instance(this);
}
}
RegisteredParameter::RegisteredParameter(Type t, bool is_buffer, int d, const std::string &name, bool is_explicit_name)
: Parameter(t, is_buffer, d, name, is_explicit_name) {
register_if_needed();
}
RegisteredParameter::RegisteredParameter(const Parameter& param) : Parameter(param) {
register_if_needed();
}
RegisteredParameter& RegisteredParameter::operator=(const Parameter& param) {
unregister_if_needed();
Parameter::operator=(param);
register_if_needed();
return *this;
}
RegisteredParameter::RegisteredParameter(const RegisteredParameter& param) : Parameter(param) {
register_if_needed();
}
RegisteredParameter& RegisteredParameter::operator=(const RegisteredParameter& param) {
unregister_if_needed();
Parameter::operator=(param);
register_if_needed();
return *this;
}
RegisteredParameter::RegisteredParameter(RegisteredParameter&& that) {
that.unregister_if_needed();
this->contents = std::move(that.contents);
that.contents = nullptr;
this->register_if_needed();
}
RegisteredParameter& RegisteredParameter::operator=(RegisteredParameter&& that) {
that.unregister_if_needed();
this->unregister_if_needed();
this->contents = std::move(that.contents);
that.contents = nullptr;
this->register_if_needed();
return *this;
}
RegisteredParameter::~RegisteredParameter() {
unregister_if_needed();
}
} // namespace Internal
} // namespace Halide