This source file includes following definitions.
- visit
- visit
- visit
- visit
- visit
- remove_dead_allocations
#include "RemoveDeadAllocations.h"
#include "IRMutator.h"
#include "IROperator.h"
#include "Scope.h"
namespace Halide {
namespace Internal {
class RemoveDeadAllocations : public IRMutator {
using IRMutator::visit;
Scope<int> allocs;
void visit(const Call *op) {
if (op->call_type == Call::Extern ||
op->call_type == Call::ExternCPlusPlus) {
for (size_t i = 0; i < op->args.size(); i++) {
const Variable *var = op->args[i].as<Variable>();
if (var && ends_with(var->name, ".buffer")) {
std::string func = var->name.substr(0, var->name.find_first_of('.'));
if (allocs.contains(func)) {
allocs.pop(func);
}
}
}
}
IRMutator::visit(op);
}
void visit(const Load *op) {
if (allocs.contains(op->name)) {
allocs.pop(op->name);
}
IRMutator::visit(op);
}
void visit(const Store *op) {
if (allocs.contains(op->name)) {
allocs.pop(op->name);
}
IRMutator::visit(op);
}
void visit(const Allocate *op) {
allocs.push(op->name, 1);
Stmt body = mutate(op->body);
if (allocs.contains(op->name)) {
stmt = body;
allocs.pop(op->name);
} else if (body.same_as(op->body)) {
stmt = op;
} else {
stmt = Allocate::make(op->name, op->type, op->extents, op->condition, body, op->new_expr, op->free_function);
}
}
void visit(const Free *op) {
if (allocs.contains(op->name)) {
stmt = Evaluate::make(0);
} else {
stmt = op;
}
}
};
Stmt remove_dead_allocations(Stmt s) {
return RemoveDeadAllocations().mutate(s);
}
}
}