IRPrinter.cpp
#include <iostream>
#include <sstream>
#include "IRPrinter.h"
#include "AssociativeOpsTable.h"
#include "Associativity.h"
#include "Closure.h"
#include "IROperator.h"
#include "Module.h"
#include "Target.h"
#include "Util.h"
namespace Halide {
using std::ostream;
using std::ostringstream;
using std::string;
using std::vector;
ostream &operator<<(ostream &out, const Type &type) {
switch (type.code()) {
case Type::Int:
out << "int";
break;
case Type::UInt:
out << "uint";
break;
case Type::Float:
out << "float";
break;
case Type::Handle:
if (type.handle_type) {
out << "(" << type.handle_type->inner_name.name << " *)";
} else {
out << "(void *)";
}
break;
case Type::BFloat:
out << "bfloat";
break;
}
if (!type.is_handle()) {
out << type.bits();
}
if (type.lanes() > 1) {
out << "x" << type.lanes();
}
return out;
}
ostream &operator<<(ostream &stream, const Expr &ir) {
if (!ir.defined()) {
stream << "(undefined)";
} else {
Internal::IRPrinter p(stream);
p.print(ir);
}
return stream;
}
ostream &operator<<(ostream &stream, const Buffer<> &buffer) {
bool include_data = Internal::ends_with(buffer.name(), "_gpu_source_kernels");
stream << "buffer " << buffer.name() << " = {";
if (include_data) {
std::string str((const char *)buffer.data(), buffer.size_in_bytes());
stream << "\n"
<< str << "\n";
} else {
stream << "...";
}
stream << "}\n";
return stream;
}
ostream &operator<<(ostream &stream, const Module &m) {
for (const auto &s : m.submodules()) {
stream << s << "\n";
}
stream << "module name=" << m.name() << ", target=" << m.target().to_string() << "\n";
for (const auto &b : m.buffers()) {
stream << b << "\n";
}
for (const auto &f : m.functions()) {
stream << f << "\n";
}
return stream;
}
ostream &operator<<(ostream &out, const DeviceAPI &api) {
switch (api) {
case DeviceAPI::Host:
case DeviceAPI::None:
break;
case DeviceAPI::Default_GPU:
out << "<Default_GPU>";
break;
case DeviceAPI::CUDA:
out << "<CUDA>";
break;
case DeviceAPI::OpenCL:
out << "<OpenCL>";
break;
case DeviceAPI::OpenGLCompute:
out << "<OpenGLCompute>";
break;
case DeviceAPI::Metal:
out << "<Metal>";
break;
case DeviceAPI::Hexagon:
out << "<Hexagon>";
break;
case DeviceAPI::HexagonDma:
out << "<HexagonDma>";
break;
case DeviceAPI::D3D12Compute:
out << "<D3D12Compute>";
break;
}
return out;
}
std::ostream &operator<<(std::ostream &out, const MemoryType &t) {
switch (t) {
case MemoryType::Auto:
out << "Auto";
break;
case MemoryType::Heap:
out << "Heap";
break;
case MemoryType::Stack:
out << "Stack";
break;
case MemoryType::Register:
out << "Register";
break;
case MemoryType::GPUShared:
out << "GPUShared";
break;
case MemoryType::GPUTexture:
out << "GPUTexture";
break;
case MemoryType::LockedCache:
out << "LockedCache";
break;
case MemoryType::VTCM:
out << "VTCM";
break;
case MemoryType::AMXTile:
out << "AMXTile";
break;
}
return out;
}
std::ostream &operator<<(std::ostream &out, const TailStrategy &t) {
switch (t) {
case TailStrategy::Auto:
out << "Auto";
break;
case TailStrategy::GuardWithIf:
out << "GuardWithIf";
break;
case TailStrategy::Predicate:
out << "Predicate";
break;
case TailStrategy::PredicateLoads:
out << "PredicateLoads";
break;
case TailStrategy::PredicateStores:
out << "PredicateStores";
break;
case TailStrategy::ShiftInwards:
out << "ShiftInwards";
break;
case TailStrategy::RoundUp:
out << "RoundUp";
break;
}
return out;
}
ostream &operator<<(ostream &stream, const LoopLevel &loop_level) {
return stream << "loop_level("
<< (loop_level.defined() ? loop_level.to_string() : "undefined")
<< ")";
}
ostream &operator<<(ostream &stream, const Target &target) {
return stream << "target(" << target.to_string() << ")";
}
namespace Internal {
void IRPrinter::test() {
Type i32 = Int(32);
Type f32 = Float(32);
Expr x = Variable::make(Int(32), "x");
Expr y = Variable::make(Int(32), "y");
ostringstream expr_source;
expr_source << (x + 3) * (y / 2 + 17);
internal_assert(expr_source.str() == "((x + 3)*((y/2) + 17))");
Stmt store = Store::make("buf", (x * 17) / (x - 3), y - 1, Parameter(), const_true(), ModulusRemainder());
Stmt for_loop = For::make("x", -2, y + 2, ForType::Parallel, DeviceAPI::Host, store);
vector<Expr> args(1);
args[0] = x % 3;
Expr call = Call::make(i32, "buf", args, Call::Extern);
Stmt store2 = Store::make("out", call + 1, x, Parameter(), const_true(), ModulusRemainder(3, 5));
Stmt for_loop2 = For::make("x", 0, y, ForType::Vectorized, DeviceAPI::Host, store2);
Stmt producer = ProducerConsumer::make_produce("buf", for_loop);
Stmt consumer = ProducerConsumer::make_consume("buf", for_loop2);
Stmt pipeline = Block::make(producer, consumer);
Stmt assertion = AssertStmt::make(y >= 3, Call::make(Int(32), "halide_error_param_too_small_i64",
{string("y"), y, 3}, Call::Extern));
Stmt block = Block::make(assertion, pipeline);
Stmt let_stmt = LetStmt::make("y", 17, block);
Stmt allocate = Allocate::make("buf", f32, MemoryType::Stack, {1023}, const_true(), let_stmt);
ostringstream source;
source << allocate;
std::string correct_source =
"allocate buf[float32 * 1023] in Stack\n"
"let y = 17\n"
"assert(y >= 3, halide_error_param_too_small_i64(\"y\", y, 3))\n"
"produce buf {\n"
" parallel (x, -2, y + 2) {\n"
" buf[y - 1] = (x*17)/(x - 3)\n"
" }\n"
"}\n"
"consume buf {\n"
" vectorized (x, 0, y) {\n"
" out[x] = buf(x % 3) + 1\n"
" }\n"
"}\n";
if (source.str() != correct_source) {
internal_error << "Correct output:\n"
<< correct_source
<< "Actual output:\n"
<< source.str();
}
std::cout << "IRPrinter test passed\n";
}
ostream &operator<<(ostream &stream, const AssociativePattern &p) {
stream << "{\n";
for (size_t i = 0; i < p.ops.size(); ++i) {
stream << " op_" << i << " -> " << p.ops[i] << ", id_" << i << " -> " << p.identities[i] << "\n";
}
stream << " is commutative? " << p.is_commutative << "\n";
stream << "}\n";
return stream;
}
ostream &operator<<(ostream &stream, const AssociativeOp &op) {
stream << "Pattern:\n"
<< op.pattern;
stream << "is associative? " << op.is_associative << "\n";
for (size_t i = 0; i < op.xs.size(); ++i) {
stream << " " << op.xs[i].var << " -> " << op.xs[i].expr << "\n";
stream << " " << op.ys[i].var << " -> " << op.ys[i].expr << "\n";
}
stream << "\n";
return stream;
}
ostream &operator<<(ostream &out, const ForType &type) {
switch (type) {
case ForType::Serial:
out << "for";
break;
case ForType::Parallel:
out << "parallel";
break;
case ForType::Unrolled:
out << "unrolled";
break;
case ForType::Vectorized:
out << "vectorized";
break;
case ForType::Extern:
out << "extern";
break;
case ForType::GPUBlock:
out << "gpu_block";
break;
case ForType::GPUThread:
out << "gpu_thread";
break;
case ForType::GPULane:
out << "gpu_lane";
break;
}
return out;
}
ostream &operator<<(ostream &out, const VectorReduce::Operator &op) {
switch (op) {
case VectorReduce::Add:
out << "Add";
break;
case VectorReduce::SaturatingAdd:
out << "SaturatingAdd";
break;
case VectorReduce::Mul:
out << "Mul";
break;
case VectorReduce::Min:
out << "Min";
break;
case VectorReduce::Max:
out << "Max";
break;
case VectorReduce::And:
out << "And";
break;
case VectorReduce::Or:
out << "Or";
break;
}
return out;
}
ostream &operator<<(ostream &out, const NameMangling &m) {
switch (m) {
case NameMangling::Default:
out << "default";
break;
case NameMangling::C:
out << "c";
break;
case NameMangling::CPlusPlus:
out << "c++";
break;
}
return out;
}
ostream &operator<<(ostream &stream, const Stmt &ir) {
if (!ir.defined()) {
stream << "(undefined)\n";
} else {
Internal::IRPrinter p(stream);
p.print(ir);
}
return stream;
}
ostream &operator<<(ostream &stream, const LoweredFunc &function) {
stream << function.linkage << " func " << function.name << " (";
for (size_t i = 0; i < function.args.size(); i++) {
stream << function.args[i].name;
if (i + 1 < function.args.size()) {
stream << ", ";
}
}
stream << ") {\n";
stream << function.body;
stream << "}\n\n";
return stream;
}
std::ostream &operator<<(std::ostream &stream, const LinkageType &type) {
switch (type) {
case LinkageType::ExternalPlusArgv:
stream << "external_plus_argv";
break;
case LinkageType::ExternalPlusMetadata:
stream << "external_plus_metadata";
break;
case LinkageType::External:
stream << "external";
break;
case LinkageType::Internal:
stream << "internal";
break;
}
return stream;
}
std::ostream &operator<<(std::ostream &stream, const Indentation &indentation) {
for (int i = 0; i < indentation.indent; i++) {
stream << " ";
}
return stream;
}
std::ostream &operator<<(std::ostream &out, const DimType &t) {
switch (t) {
case DimType::PureVar:
out << "PureVar";
break;
case DimType::PureRVar:
out << "PureRVar";
break;
case DimType::ImpureRVar:
out << "ImpureRVar";
break;
}
return out;
}
std::ostream &operator<<(std::ostream &out, const Closure &c) {
for (const auto &v : c.vars) {
out << "var: " << v.first << "\n";
}
for (const auto &b : c.buffers) {
out << "buffer: " << b.first << " " << b.second.size;
if (b.second.read) {
out << " (read)";
}
if (b.second.write) {
out << " (write)";
}
if (b.second.memory_type == MemoryType::GPUTexture) {
out << " <texture>";
}
out << " dims=" << (int)b.second.dimensions;
out << "\n";
}
return out;
}
IRPrinter::IRPrinter(ostream &s)
: stream(s) {
s.setf(std::ios::fixed, std::ios::floatfield);
}
void IRPrinter::print(const Expr &ir) {
ScopedValue<bool> old(implicit_parens, false);
ir.accept(this);
}
void IRPrinter::print_no_parens(const Expr &ir) {
ScopedValue<bool> old(implicit_parens, true);
ir.accept(this);
}
void IRPrinter::print(const Stmt &ir) {
ir.accept(this);
}
void IRPrinter::print_list(const std::vector<Expr> &exprs) {
for (size_t i = 0; i < exprs.size(); i++) {
print_no_parens(exprs[i]);
if (i < exprs.size() - 1) {
stream << ", ";
}
}
}
void IRPrinter::visit(const IntImm *op) {
if (op->type == Int(32)) {
stream << op->value;
} else {
stream << "(" << op->type << ")" << op->value;
}
}
void IRPrinter::visit(const UIntImm *op) {
stream << "(" << op->type << ")" << op->value;
}
void IRPrinter::visit(const FloatImm *op) {
switch (op->type.bits()) {
case 64:
stream << op->value;
break;
case 32:
stream << op->value << "f";
break;
case 16:
stream << op->value << "h";
break;
default:
internal_error << "Bad bit-width for float: " << op->type << "\n";
}
}
void IRPrinter::visit(const StringImm *op) {
stream << "\"";
for (unsigned char c : op->value) {
if (c >= ' ' && c <= '~' && c != '\\' && c != '"') {
stream << c;
} else {
stream << "\\";
switch (c) {
case '"':
stream << "\"";
break;
case '\\':
stream << "\\";
break;
case '\t':
stream << "t";
break;
case '\r':
stream << "r";
break;
case '\n':
stream << "n";
break;
default:
string hex_digits = "0123456789ABCDEF";
stream << "x" << hex_digits[c >> 4] << hex_digits[c & 0xf];
}
}
}
stream << "\"";
}
void IRPrinter::visit(const Cast *op) {
stream << op->type << "(";
print(op->value);
stream << ")";
}
void IRPrinter::visit(const Variable *op) {
if (!known_type.contains(op->name) &&
(op->type != Int(32))) {
// Handle types already have parens
if (op->type.is_handle()) {
stream << op->type;
} else {
stream << "(" << op->type << ")";
}
}
stream << op->name;
}
void IRPrinter::open() {
if (!implicit_parens) {
stream << "(";
}
}
void IRPrinter::close() {
if (!implicit_parens) {
stream << ")";
}
}
void IRPrinter::visit(const Add *op) {
open();
print(op->a);
stream << " + ";
print(op->b);
close();
}
void IRPrinter::visit(const Sub *op) {
open();
print(op->a);
stream << " - ";
print(op->b);
close();
}
void IRPrinter::visit(const Mul *op) {
open();
print(op->a);
stream << "*";
print(op->b);
close();
}
void IRPrinter::visit(const Div *op) {
open();
print(op->a);
stream << "/";
print(op->b);
close();
}
void IRPrinter::visit(const Mod *op) {
open();
print(op->a);
stream << " % ";
print(op->b);
close();
}
void IRPrinter::visit(const Min *op) {
stream << "min(";
print_no_parens(op->a);
stream << ", ";
print_no_parens(op->b);
stream << ")";
}
void IRPrinter::visit(const Max *op) {
stream << "max(";
print_no_parens(op->a);
stream << ", ";
print_no_parens(op->b);
stream << ")";
}
void IRPrinter::visit(const EQ *op) {
open();
print(op->a);
stream << " == ";
print(op->b);
close();
}
void IRPrinter::visit(const NE *op) {
open();
print(op->a);
stream << " != ";
print(op->b);
close();
}
void IRPrinter::visit(const LT *op) {
open();
print(op->a);
stream << " < ";
print(op->b);
close();
}
void IRPrinter::visit(const LE *op) {
open();
print(op->a);
stream << " <= ";
print(op->b);
close();
}
void IRPrinter::visit(const GT *op) {
open();
print(op->a);
stream << " > ";
print(op->b);
close();
}
void IRPrinter::visit(const GE *op) {
open();
print(op->a);
stream << " >= ";
print(op->b);
close();
}
void IRPrinter::visit(const And *op) {
open();
print(op->a);
stream << " && ";
print(op->b);
close();
}
void IRPrinter::visit(const Or *op) {
open();
print(op->a);
stream << " || ";
print(op->b);
close();
}
void IRPrinter::visit(const Not *op) {
stream << "!";
print(op->a);
}
void IRPrinter::visit(const Select *op) {
stream << "select(";
print_no_parens(op->condition);
stream << ", ";
print_no_parens(op->true_value);
stream << ", ";
print_no_parens(op->false_value);
stream << ")";
}
void IRPrinter::visit(const Load *op) {
const bool has_pred = !is_const_one(op->predicate);
const bool show_alignment = op->type.is_vector() && op->alignment.modulus > 1;
if (has_pred) {
open();
}
if (!known_type.contains(op->name)) {
stream << "(" << op->type << ")";
}
stream << op->name << "[";
print_no_parens(op->index);
if (show_alignment) {
stream << " aligned(" << op->alignment.modulus << ", " << op->alignment.remainder << ")";
}
stream << "]";
if (has_pred) {
stream << " if ";
print(op->predicate);
close();
}
}
void IRPrinter::visit(const Ramp *op) {
stream << "ramp(";
print_no_parens(op->base);
stream << ", ";
print_no_parens(op->stride);
stream << ", " << op->lanes << ")";
}
void IRPrinter::visit(const Broadcast *op) {
stream << "x" << op->lanes << "(";
print_no_parens(op->value);
stream << ")";
}
void IRPrinter::visit(const Call *op) {
// TODO: Print indication of C vs C++?
if (!known_type.contains(op->name) &&
(op->type != Int(32))) {
if (op->type.is_handle()) {
stream << op->type; // Already has parens
} else {
stream << "(" << op->type << ")";
}
}
stream << op->name << "(";
print_list(op->args);
stream << ")";
}
void IRPrinter::visit(const Let *op) {
ScopedBinding<> bind(known_type, op->name);
open();
stream << "let " << op->name << " = ";
print(op->value);
stream << " in ";
print(op->body);
close();
}
void IRPrinter::visit(const LetStmt *op) {
ScopedBinding<> bind(known_type, op->name);
stream << get_indent() << "let " << op->name << " = ";
print_no_parens(op->value);
stream << "\n";
print(op->body);
}
void IRPrinter::visit(const AssertStmt *op) {
stream << get_indent() << "assert(";
print_no_parens(op->condition);
stream << ", ";
print_no_parens(op->message);
stream << ")\n";
}
void IRPrinter::visit(const ProducerConsumer *op) {
stream << get_indent();
if (op->is_producer) {
stream << "produce " << op->name << " {\n";
} else {
stream << "consume " << op->name << " {\n";
}
indent++;
print(op->body);
indent--;
stream << get_indent() << "}\n";
}
void IRPrinter::visit(const For *op) {
ScopedBinding<> bind(known_type, op->name);
stream << get_indent() << op->for_type << op->device_api << " (" << op->name << ", ";
print_no_parens(op->min);
stream << ", ";
print_no_parens(op->extent);
stream << ") {\n";
indent++;
print(op->body);
indent--;
stream << get_indent() << "}\n";
}
void IRPrinter::visit(const Acquire *op) {
stream << get_indent() << "acquire (";
print_no_parens(op->semaphore);
stream << ", ";
print_no_parens(op->count);
stream << ") {\n";
indent++;
print(op->body);
indent--;
stream << get_indent() << "}\n";
}
void IRPrinter::print_lets(const Let *let) {
stream << get_indent();
ScopedBinding<> bind(known_type, let->name);
stream << "let " << let->name << " = ";
print_no_parens(let->value);
stream << " in\n";
if (const Let *next = let->body.as<Let>()) {
print_lets(next);
} else {
stream << get_indent();
print_no_parens(let->body);
stream << "\n";
}
}
void IRPrinter::visit(const Store *op) {
stream << get_indent();
const bool has_pred = !is_const_one(op->predicate);
const bool show_alignment = op->value.type().is_vector() && (op->alignment.modulus > 1);
if (has_pred) {
stream << "predicate (";
print_no_parens(op->predicate);
stream << ")\n";
indent++;
stream << get_indent();
}
stream << op->name << "[";
print_no_parens(op->index);
if (show_alignment) {
stream << " aligned("
<< op->alignment.modulus
<< ", "
<< op->alignment.remainder << ")";
}
stream << "] = ";
if (const Let *let = op->value.as<Let>()) {
// Use some nicer line breaks for containing Lets
stream << "\n";
indent += 2;
print_lets(let);
indent -= 2;
} else {
// Just print the value in-line
print_no_parens(op->value);
}
stream << "\n";
if (has_pred) {
indent--;
}
}
void IRPrinter::visit(const Provide *op) {
stream << get_indent();
const bool has_pred = !is_const_one(op->predicate);
if (has_pred) {
stream << "predicate (";
print_no_parens(op->predicate);
stream << ")\n";
indent++;
stream << get_indent();
}
stream << op->name << "(";
print_list(op->args);
stream << ") = ";
if (op->values.size() > 1) {
stream << "{";
}
print_list(op->values);
if (op->values.size() > 1) {
stream << "}";
}
stream << "\n";
if (has_pred) {
indent--;
}
}
void IRPrinter::visit(const Allocate *op) {
ScopedBinding<> bind(known_type, op->name);
stream << get_indent() << "allocate " << op->name << "[" << op->type;
for (const auto &extent : op->extents) {
stream << " * ";
print(extent);
}
stream << "]";
if (op->memory_type != MemoryType::Auto) {
stream << " in " << op->memory_type;
}
if (!is_const_one(op->condition)) {
stream << " if ";
print(op->condition);
}
if (op->new_expr.defined()) {
stream << "\n";
stream << get_indent() << " custom_new { ";
print_no_parens(op->new_expr);
stream << " }";
}
if (!op->free_function.empty()) {
stream << "\n";
stream << get_indent() << " custom_delete { " << op->free_function << "(" << op->name << "); }";
}
stream << "\n";
print(op->body);
}
void IRPrinter::visit(const Free *op) {
stream << get_indent() << "free " << op->name;
stream << "\n";
}
void IRPrinter::visit(const Realize *op) {
ScopedBinding<> bind(known_type, op->name);
stream << get_indent() << "realize " << op->name << "(";
for (size_t i = 0; i < op->bounds.size(); i++) {
stream << "[";
print_no_parens(op->bounds[i].min);
stream << ", ";
print_no_parens(op->bounds[i].extent);
stream << "]";
if (i < op->bounds.size() - 1) {
stream << ", ";
}
}
stream << ")";
if (op->memory_type != MemoryType::Auto) {
stream << " in " << op->memory_type;
}
if (!is_const_one(op->condition)) {
stream << " if ";
print(op->condition);
}
stream << " {\n";
indent++;
print(op->body);
indent--;
stream << get_indent() << "}\n";
}
void IRPrinter::visit(const Prefetch *op) {
stream << get_indent();
const bool has_cond = !is_const_one(op->condition);
if (has_cond) {
stream << "if (";
print_no_parens(op->condition);
stream << ") {\n";
indent++;
stream << get_indent();
}
stream << "prefetch " << op->name << ", " << op->prefetch.at << ", " << op->prefetch.from << ", (";
for (size_t i = 0; i < op->bounds.size(); i++) {
stream << "[";
print_no_parens(op->bounds[i].min);
stream << ", ";
print_no_parens(op->bounds[i].extent);
stream << "]";
if (i < op->bounds.size() - 1) {
stream << ", ";
}
}
stream << ")\n";
if (has_cond) {
indent--;
stream << get_indent() << "}\n";
}
print(op->body);
}
void IRPrinter::visit(const Block *op) {
print(op->first);
print(op->rest);
}
void IRPrinter::visit(const Fork *op) {
vector<Stmt> stmts;
stmts.push_back(op->first);
Stmt rest = op->rest;
while (const Fork *f = rest.as<Fork>()) {
stmts.push_back(f->first);
rest = f->rest;
}
stmts.push_back(rest);
stream << get_indent() << "fork ";
for (const Stmt &s : stmts) {
stream << "{\n";
indent++;
print(s);
indent--;
stream << get_indent() << "} ";
}
stream << "\n";
}
void IRPrinter::visit(const IfThenElse *op) {
stream << get_indent();
while (true) {
stream << "if (";
print_no_parens(op->condition);
stream << ") {\n";
indent++;
print(op->then_case);
indent--;
if (!op->else_case.defined()) {
break;
}
if (const IfThenElse *nested_if = op->else_case.as<IfThenElse>()) {
stream << get_indent() << "} else ";
op = nested_if;
} else {
stream << get_indent() << "} else {\n";
indent++;
print(op->else_case);
indent--;
break;
}
}
stream << get_indent() << "}\n";
}
void IRPrinter::visit(const Evaluate *op) {
stream << get_indent();
print_no_parens(op->value);
stream << "\n";
}
void IRPrinter::visit(const Shuffle *op) {
if (op->is_concat()) {
stream << "concat_vectors(";
print_list(op->vectors);
stream << ")";
} else if (op->is_interleave()) {
stream << "interleave_vectors(";
print_list(op->vectors);
stream << ")";
} else if (op->is_extract_element()) {
stream << "extract_element(";
print_list(op->vectors);
stream << ", " << op->indices[0] << ")";
} else if (op->is_slice()) {
stream << "slice_vectors(";
print_list(op->vectors);
stream << ", " << op->slice_begin()
<< ", " << op->slice_stride()
<< ", " << op->indices.size()
<< ")";
} else if (op->is_broadcast()) {
stream << "broadcast(";
print_list(op->vectors);
stream << ", " << op->broadcast_factor() << ")";
} else {
stream << "shuffle(";
print_list(op->vectors);
stream << ", ";
for (size_t i = 0; i < op->indices.size(); i++) {
print_no_parens(op->indices[i]);
if (i < op->indices.size() - 1) {
stream << ", ";
}
}
stream << ")";
}
}
void IRPrinter::visit(const VectorReduce *op) {
stream << "("
<< op->type
<< ")vector_reduce("
<< op->op
<< ", "
<< op->value
<< ")";
}
void IRPrinter::visit(const Atomic *op) {
if (op->mutex_name.empty()) {
stream << get_indent() << "atomic {\n";
} else {
stream << get_indent() << "atomic (";
stream << op->mutex_name;
stream << ") {\n";
}
indent += 2;
print(op->body);
indent -= 2;
stream << get_indent() << "}\n";
}
} // namespace Internal
} // namespace Halide