def __init__(self, *args, **kwargs):
self._dispatcher = TargetDispatcher()
self._dispatcher.register_state_dispatcher(self)
self._initcode = CodeIOStream()
self._exitcode = CodeIOStream()
class DaCeCodeGenerator(object):
""" DaCe code generator class that writes the generated code for SDFG
state machines, and uses a dispatcher to generate code for
individual states based on the target. """
def __init__(self, *args, **kwargs):
self._dispatcher = TargetDispatcher()
self._dispatcher.register_state_dispatcher(self)
self._initcode = CodeIOStream()
self._exitcode = CodeIOStream()
##################################################################
# Target registry
@property
def dispatcher(self):
return self._dispatcher
##################################################################
# Code generation
def generate_constants(self, sdfg: SDFG, callsite_stream: CodeIOStream):
# Write constants
for cstname, (csttype, cstval) in sdfg.constants_prop.items():
if isinstance(csttype, data.Array):
const_str = "constexpr " + csttype.dtype.ctype + \
" " + cstname + "[" + str(cstval.size) + "] = {"
it = np.nditer(cstval, order='C')
for i in range(cstval.size - 1):
const_str += str(it[0]) + ", "
it.iternext()
const_str += str(it[0]) + "};\n"
callsite_stream.write(const_str, sdfg)
else:
callsite_stream.write(
"constexpr %s %s = %s;\n" %
(csttype.dtype.ctype, cstname, str(cstval)), sdfg)
def generate_fileheader(self, sdfg: SDFG, global_stream: CodeIOStream):
""" Generate a header in every output file that includes custom types
and constants.
:param sdfg: The input SDFG.
:param global_stream: Stream to write to (global).
"""
#########################################################
# Custom types
datatypes = set()
# Types of this SDFG
for _, arrname, arr in sdfg.arrays_recursive():
if arr is not None:
datatypes.add(arr.dtype)
# Emit unique definitions
wrote_something = False
for typ in datatypes:
if hasattr(typ, 'emit_definition'):
if not wrote_something:
global_stream.write("", sdfg)
wrote_something = True
global_stream.write(typ.emit_definition(), sdfg)
if wrote_something:
global_stream.write("", sdfg)
#########################################################
# Write constants
self.generate_constants(sdfg, global_stream)
for sd in sdfg.all_sdfgs_recursive():
global_stream.write(sd.global_code, sd)
def generate_header(self, sdfg: SDFG, used_environments: Set[str],
global_stream: CodeIOStream,
callsite_stream: CodeIOStream):
""" Generate the header of the frame-code. Code exists in a separate
function for overriding purposes.
:param sdfg: The input SDFG.
:param global_stream: Stream to write to (global).
:param callsite_stream: Stream to write to (at call site).
"""
environments = [
dace.library.get_environment(env_name)
for env_name in used_environments
]
# Write frame code - header
global_stream.write(
'/* DaCe AUTO-GENERATED FILE. DO NOT MODIFY */\n' +
'#include <dace/dace.h>\n', sdfg)
# Write header required by environments
for env in environments:
if len(env.headers) > 0:
global_stream.write(
"\n".join("#include \"" + h + "\"" for h in env.headers),
sdfg)
global_stream.write("\n", sdfg)
self.generate_fileheader(sdfg, global_stream)
# Instrumentation preamble
if len(self._dispatcher.instrumentation) > 1:
global_stream.write(
'namespace dace { namespace perf { Report report; } }', sdfg)
callsite_stream.write('dace::perf::report.reset();', sdfg)
def generate_footer(self, sdfg: SDFG, used_environments: Set[str],
global_stream: CodeIOStream,
callsite_stream: CodeIOStream):
""" Generate the footer of the frame-code. Code exists in a separate
function for overriding purposes.
:param sdfg: The input SDFG.
:param global_stream: Stream to write to (global).
:param callsite_stream: Stream to write to (at call site).
"""
fname = sdfg.name
params = sdfg.signature()
paramnames = sdfg.signature(False, for_call=True)
environments = [
dace.library.get_environment(env_name)
for env_name in used_environments
]
# Invoke all instrumentation providers
for instr in self._dispatcher.instrumentation.values():
if instr is not None:
instr.on_sdfg_end(sdfg, callsite_stream, global_stream)
# Instrumentation saving
if len(self._dispatcher.instrumentation) > 1:
callsite_stream.write(
'dace::perf::report.save(".dacecache/%s/perf");' % sdfg.name,
sdfg)
# Write closing brace of program
callsite_stream.write('}', sdfg)
# Write awkward footer to avoid 'extern "C"' issues
callsite_stream.write(
"""
DACE_EXPORTED void __program_%s(%s)
{
__program_%s_internal(%s);
}
""" % (fname, params, fname, paramnames), sdfg)
for target in self._dispatcher.used_targets:
if target.has_initializer:
callsite_stream.write(
'DACE_EXPORTED int __dace_init_%s(%s);\n' %
(target.target_name, params), sdfg)
if target.has_finalizer:
callsite_stream.write(
'DACE_EXPORTED int __dace_exit_%s(%s);\n' %
(target.target_name, params), sdfg)
callsite_stream.write(
"""
DACE_EXPORTED int __dace_init_%s(%s)
{
int __result = 0;
""" % (sdfg.name, params), sdfg)
for target in self._dispatcher.used_targets:
if target.has_initializer:
callsite_stream.write(
'__result |= __dace_init_%s(%s);' %
(target.target_name, paramnames), sdfg)
for env in environments:
if env.init_code:
callsite_stream.write("{ // Environment: " + env.__name__,
sdfg)
callsite_stream.write(env.init_code)
callsite_stream.write("}")
callsite_stream.write(sdfg.init_code, sdfg)
callsite_stream.write(self._initcode.getvalue(), sdfg)
callsite_stream.write(
"""
return __result;
}
DACE_EXPORTED void __dace_exit_%s(%s)
{
""" % (sdfg.name, params), sdfg)
callsite_stream.write(self._exitcode.getvalue(), sdfg)
callsite_stream.write(sdfg.exit_code, sdfg)
for target in self._dispatcher.used_targets:
if target.has_finalizer:
callsite_stream.write(
'__dace_exit_%s(%s);' % (target.target_name, paramnames),
sdfg)
for env in environments:
if env.finalize_code:
callsite_stream.write("{ // Environment: " + env.__name__,
sdfg)
callsite_stream.write(env.init_code)
callsite_stream.write("}")
callsite_stream.write('}\n', sdfg)
def generate_state(self,
sdfg,
state,
global_stream,
callsite_stream,
generate_state_footer=True):
sid = sdfg.node_id(state)
# Emit internal transient array allocation
# Don't allocate transients shared with another state
data_to_allocate = (set(state.top_level_transients()) -
set(sdfg.shared_transients()))
allocated = set()
for node in state.data_nodes():
if node.data not in data_to_allocate or node.data in allocated:
continue
allocated.add(node.data)
self._dispatcher.dispatch_allocate(sdfg, state, sid, node,
global_stream, callsite_stream)
self._dispatcher.dispatch_initialize(sdfg, state, sid, node,
global_stream,
callsite_stream)
# Invoke all instrumentation providers
for instr in self._dispatcher.instrumentation.values():
if instr is not None:
instr.on_state_begin(sdfg, state, callsite_stream,
global_stream)
#####################
# Create dataflow graph for state's children.
# DFG to code scheme: Only generate code for nodes whose all
# dependencies have been executed (topological sort).
# For different connected components, run them concurrently.
components = dace.sdfg.concurrent_subgraphs(state)
if len(components) == 1:
self._dispatcher.dispatch_subgraph(sdfg,
state,
sid,
global_stream,
callsite_stream,
skip_entry_node=False)
else:
callsite_stream.write("#pragma omp parallel sections\n{")
for c in components:
callsite_stream.write("#pragma omp section\n{")
self._dispatcher.dispatch_subgraph(sdfg,
c,
sid,
global_stream,
callsite_stream,
skip_entry_node=False)
callsite_stream.write("} // End omp section")
callsite_stream.write("} // End omp sections")
#####################
# Write state footer
if generate_state_footer:
# Emit internal transient array deallocation
deallocated = set()
for node in state.data_nodes():
if (node.data not in data_to_allocate
or node.data in deallocated
or (node.data in sdfg.arrays
and sdfg.arrays[node.data].transient == False)):
continue
deallocated.add(node.data)
self._dispatcher.dispatch_deallocate(sdfg, state, sid, node,
global_stream,
callsite_stream)
# Invoke all instrumentation providers
for instr in self._dispatcher.instrumentation.values():
if instr is not None:
instr.on_state_end(sdfg, state, callsite_stream,
global_stream)
@staticmethod
def _generate_assignments(assignments):
return [
"{} = {}".format(variable, value)
for variable, value in assignments.items()
]
@staticmethod
def _is_always_true(condition_string):
return condition_string in ["true", "1"]
def _generate_transition(self, sdfg, sid, callsite_stream, edge,
assignments):
condition_string = cppunparse.cppunparse(edge.data.condition, False)
always_true = self._is_always_true(condition_string)
if not always_true:
callsite_stream.write("if ({}) {{".format(condition_string), sdfg,
sid)
if len(assignments) > 0:
callsite_stream.write(
";\n".join(
DaCeCodeGenerator._generate_assignments(assignments) +
[""]), sdfg, sid)
callsite_stream.write(
"goto __state_{}_{};".format(sdfg.name, edge.dst.label), sdfg, sid)
if not always_true:
callsite_stream.write("}")
def generate_states(self, sdfg, scope_label, control_flow, global_stream,
callsite_stream, scope, states_generated,
generated_edges):
states_topological = list(sdfg.topological_sort(sdfg.start_state))
states_to_generate = collections.deque([
s for s in states_topological
if s in scope and s not in states_generated
])
if len(states_to_generate) == 0:
return
while len(states_to_generate) > 0:
state = states_to_generate.popleft()
# When generating control flow constructs, we will not necessarily
# move in topological order, so make sure this state has not
# already been generated.
if state in states_generated or state not in scope:
continue
states_generated.add(state)
sid = sdfg.node_id(state)
callsite_stream.write(
"__state_{}_{}:\n".format(sdfg.name, state.label), sdfg, sid)
# Don't generate brackets and comments for empty states
if len([
n for n in state.nodes()
if not isinstance(n, dace.graph.nodes.EmptyTasklet)
]) > 0:
callsite_stream.write('{', sdfg, sid)
self._dispatcher.dispatch_state(sdfg, state, global_stream,
callsite_stream)
callsite_stream.write('}', sdfg, sid)
else:
callsite_stream.write(";")
out_edges = sdfg.out_edges(state)
# Write conditional branches to next states
for edge in out_edges:
generate_assignments = True
generate_transition = True
# Handle specialized control flow
if (dace.config.Config.get_bool('optimizer',
'detect_control_flow')):
for control in control_flow[edge]:
if isinstance(control,
dace.graph.edges.LoopAssignment):
# Generate the transition, but leave the
# assignments to the loop
generate_transition &= True
generate_assignments &= False
elif isinstance(control, dace.graph.edges.LoopBack):
generate_transition &= False
generate_assignments &= False
elif isinstance(control, dace.graph.edges.LoopExit):
# Need to strip the condition, so generate it from
# the loop entry
generate_transition &= False
generate_assignments &= True
elif isinstance(control, dace.graph.edges.LoopEntry):
generate_transition &= False
generate_assignments &= False
if control.scope.assignment is not None:
assignment_edge = control.scope.assignment.edge
init_assignments = ", ".join(
DaCeCodeGenerator._generate_assignments(
assignment_edge.data.assignments))
generated_edges.add(assignment_edge)
else:
init_assignments = ""
back_edge = control.scope.back.edge
continue_assignments = ", ".join(
DaCeCodeGenerator._generate_assignments(
back_edge.data.assignments))
generated_edges.add(back_edge)
entry_edge = control.scope.entry.edge
condition = cppunparse.cppunparse(
entry_edge.data.condition, False)
generated_edges.add(entry_edge)
if (len(init_assignments) > 0
or len(continue_assignments) > 0):
callsite_stream.write(
"for ({}; {}; {}) {{".format(
init_assignments, condition,
continue_assignments), sdfg, sid)
else:
callsite_stream.write(
"while ({}) {{".format(condition), sdfg,
sid)
# Generate loop body
self.generate_states(
sdfg, entry_edge.src.label + "_loop",
control_flow, global_stream, callsite_stream,
control.scope, states_generated,
generated_edges)
callsite_stream.write("}", sdfg, sid)
exit_edge = control.scope.exit.edge
# Update states to generate after nested call
states_to_generate = collections.deque([
s for s in states_to_generate
if s not in states_generated
])
# If the next state to be generated is the exit
# state, we can omit the goto
if (len(states_to_generate) > 0
and states_to_generate[0] == exit_edge.dst
and exit_edge.dst not in states_generated):
pass
elif edge in generated_edges:
# This edge has more roles, goto doesn't apply
pass
else:
callsite_stream.write(
"goto __state_{}_{};".format(
sdfg.name,
control.scope.exit.edge.dst))
generated_edges.add(control.scope.exit.edge)
elif isinstance(control, dace.graph.edges.IfExit):
generate_transition &= True
generate_assignments &= True
elif isinstance(control, dace.graph.edges.IfEntry):
generate_transition &= False
generate_assignments &= True
if len(set(control.scope) - states_generated) == 0:
continue
then_scope = control.scope.if_then_else.then_scope
else_scope = control.scope.if_then_else.else_scope
then_entry = then_scope.entry.edge
condition = cppunparse.cppunparse(
then_entry.data.condition, False)
callsite_stream.write(
"if ({}) {{".format(condition), sdfg, sid)
generated_edges.add(then_entry)
# Generate the then-scope
self.generate_states(sdfg, state.label + "_then",
control_flow, global_stream,
callsite_stream, then_scope,
states_generated,
generated_edges)
callsite_stream.write("} else {", sdfg, sid)
generated_edges.add(else_scope.entry.edge)
# Generate the else-scope
self.generate_states(sdfg, state.label + "_else",
control_flow, global_stream,
callsite_stream, else_scope,
states_generated,
generated_edges)
callsite_stream.write("}", sdfg, sid)
generated_edges.add(else_scope.exit.edge)
# Update states to generate after nested call
states_to_generate = collections.deque([
s for s in states_to_generate
if s not in states_generated
])
if_exit_state = control.scope.exit.edge.dst
if ((if_exit_state not in states_generated) and
((len(states_to_generate) > 0) and
(states_to_generate[0] == if_exit_state))):
pass
else:
callsite_stream.write(
"goto __state_{}_{};".format(
sdfg.name,
control.scope.exit.edge.dst))
else:
raise TypeError(
"Unknown control flow \"{}\"".format(
type(control).__name__))
if generate_assignments and len(edge.data.assignments) > 0:
assignments_to_generate = edge.data.assignments
else:
assignments_to_generate = {}
if generate_transition:
if ((len(out_edges) == 1)
and (edge.dst not in states_generated)
and ((len(states_to_generate) > 0) and
(states_to_generate[0] == edge.dst))):
# If there is only one outgoing edge, the target will
# be generated next, we can omit the goto
pass
elif (len(out_edges) == 1 and len(states_to_generate) == 0
and (edge.dst not in scope)):
# This scope has ended, and we don't need to generate
# any output edge
pass
else:
self._generate_transition(sdfg, sid, callsite_stream,
edge,
assignments_to_generate)
# Assignments will be generated in the transition
generate_assignments = False
if generate_assignments:
callsite_stream.write(
";\n".join(
DaCeCodeGenerator._generate_assignments(
assignments_to_generate) + [""]), sdfg, sid)
generated_edges.add(edge)
# End of out_edges loop
if (((len(out_edges) == 0) or
(not isinstance(scope, dace.graph.edges.ControlFlowScope) and
(len(states_to_generate) == 0)))
and (len(states_generated) != sdfg.number_of_nodes())):
callsite_stream.write(
"goto __state_exit_{}_{};".format(sdfg.name, scope_label),
sdfg, sid)
# Write exit state
callsite_stream.write(
"__state_exit_{}_{}:;".format(sdfg.name, scope_label), sdfg)
def generate_code(
self,
sdfg: SDFG,
schedule: Optional[dtypes.ScheduleType],
sdfg_id: str = ""
) -> Tuple[str, str, Set[TargetCodeGenerator], Set[str]]:
""" Generate frame code for a given SDFG, calling registered targets'
code generation callbacks for them to generate their own code.
:param sdfg: The SDFG to generate code for.
:param schedule: The schedule the SDFG is currently located, or
None if the SDFG is top-level.
:param sdfg_id: An optional string id given to the SDFG label
:return: A tuple of the generated global frame code, local frame
code, and a set of targets that have been used in the
generation of this SDFG.
"""
sdfg_label = sdfg.name + sdfg_id
global_stream = CodeIOStream()
callsite_stream = CodeIOStream()
# Set default storage/schedule types in SDFG
set_default_schedule_and_storage_types(sdfg, schedule)
is_top_level = sdfg.parent is None
# Generate code
###########################
# Invoke all instrumentation providers
for instr in self._dispatcher.instrumentation.values():
if instr is not None:
instr.on_sdfg_begin(sdfg, callsite_stream, global_stream)
# Allocate outer-level transients
shared_transients = sdfg.shared_transients()
allocated = set()
for state in sdfg.nodes():
for node in state.data_nodes():
if (node.data in shared_transients
and node.data not in allocated):
self._dispatcher.dispatch_allocate(sdfg, state, None, node,
global_stream,
callsite_stream)
self._dispatcher.dispatch_initialize(
sdfg, state, None, node, global_stream,
callsite_stream)
allocated.add(node.data)
# Allocate inter-state variables
assigned, _ = sdfg.interstate_symbols()
for isvarName, isvarType in assigned.items():
# Skip symbols that have been declared as outer-level transients
if isvarName in allocated:
continue
callsite_stream.write(
'%s;\n' %
(isvarType.signature(with_types=True, name=isvarName)), sdfg)
# Initialize parameter arrays
for argnode in dtypes.deduplicate(sdfg.input_arrays() +
sdfg.output_arrays()):
# Ignore transient arrays
if argnode.desc(sdfg).transient: continue
self._dispatcher.dispatch_initialize(sdfg, sdfg, None, argnode,
global_stream,
callsite_stream)
callsite_stream.write('\n', sdfg)
states_topological = list(sdfg.topological_sort(sdfg.start_state))
# {edge: [dace.edges.ControlFlow]}
control_flow = {e: [] for e in sdfg.edges()}
if dace.config.Config.get_bool('optimizer', 'detect_control_flow'):
####################################################################
# Loop detection procedure
all_cycles = list(sdfg.find_cycles()) # Returns a list of lists
# Order according to topological sort
all_cycles = [
sorted(c, key=lambda x: states_topological.index(x))
for c in all_cycles
]
# Group in terms of starting node
starting_nodes = [c[0] for c in all_cycles]
# Order cycles according to starting node in topological sort
starting_nodes = sorted(starting_nodes,
key=lambda x: states_topological.index(x))
cycles_by_node = [[c for c in all_cycles if c[0] == n]
for n in starting_nodes]
for cycles in cycles_by_node:
# Use arbitrary cycle to find the first and last nodes
first_node = cycles[0][0]
last_node = cycles[0][-1]
if not first_node.is_empty():
# The entry node should not contain any computations
continue
if not all([c[-1] == last_node for c in cycles]):
# There are multiple back edges: not a for or while loop
continue
previous_edge = [
e for e in sdfg.in_edges(first_node) if e.src != last_node
]
if len(previous_edge) != 1:
# No single starting point: not a for or while
continue
previous_edge = previous_edge[0]
back_edge = sdfg.edges_between(last_node, first_node)
if len(back_edge) != 1:
raise RuntimeError("Expected exactly one edge in cycle")
back_edge = back_edge[0]
# Build a set of all nodes in all cycles associated with this
# set of start and end node
internal_nodes = functools.reduce(
lambda a, b: a | b, [set(c)
for c in cycles]) - {first_node}
exit_edge = [
e for e in sdfg.out_edges(first_node)
if e.dst not in internal_nodes | {first_node}
]
if len(exit_edge) != 1:
# No single stopping condition: not a for or while
# (we don't support continue or break)
continue
exit_edge = exit_edge[0]
entry_edge = [
e for e in sdfg.out_edges(first_node) if e != exit_edge
]
if len(entry_edge) != 1:
# No single starting condition: not a for or while
continue
entry_edge = entry_edge[0]
# Make sure this is not already annotated to be another construct
if (len(control_flow[entry_edge]) != 0
or len(control_flow[back_edge]) != 0):
continue
# Nested loops case I - previous edge of internal loop is a
# loop-entry of an external loop (first state in a loop is
# another loop)
if (len(control_flow[previous_edge]) == 1
and isinstance(control_flow[previous_edge][0],
dace.graph.edges.LoopEntry)):
# Nested loop, mark parent scope
loop_parent = control_flow[previous_edge][0].scope
# Nested loops case II - exit edge of internal loop is a
# back-edge of an external loop (last state in a loop is another
# loop)
elif (len(control_flow[exit_edge]) == 1
and isinstance(control_flow[exit_edge][0],
dace.graph.edges.LoopBack)):
# Nested loop, mark parent scope
loop_parent = control_flow[exit_edge][0].scope
elif (len(control_flow[exit_edge]) == 0
or len(control_flow[previous_edge]) == 0):
loop_parent = None
else:
continue
if entry_edge == back_edge:
# No entry check (we don't support do-loops)
# TODO: do we want to add some support for self-loops?
continue
# Now we make sure that there is no other way to exit this
# cycle, by checking that there's no reachable node *not*
# included in any cycle between the first and last node.
if any([len(set(c) - internal_nodes) > 1 for c in cycles]):
continue
# This is a loop! Generate the necessary annotation objects.
loop_scope = dace.graph.edges.LoopScope(internal_nodes)
if ((len(previous_edge.data.assignments) > 0
or len(back_edge.data.assignments) > 0) and
(len(control_flow[previous_edge]) == 0 or
(len(control_flow[previous_edge]) == 1 and
control_flow[previous_edge][0].scope == loop_parent))):
# Generate assignment edge, if available
control_flow[previous_edge].append(
dace.graph.edges.LoopAssignment(
loop_scope, previous_edge))
# Assign remaining control flow constructs
control_flow[entry_edge].append(
dace.graph.edges.LoopEntry(loop_scope, entry_edge))
control_flow[exit_edge].append(
dace.graph.edges.LoopExit(loop_scope, exit_edge))
control_flow[back_edge].append(
dace.graph.edges.LoopBack(loop_scope, back_edge))
###################################################################
# If/then/else detection procedure
candidates = [
n for n in states_topological if sdfg.out_degree(n) == 2
]
for candidate in candidates:
# A valid if occurs when then are no reachable nodes for either
# path that does not pass through a common dominator.
dominators = nx.dominance.dominance_frontiers(
sdfg.nx, candidate)
left_entry, right_entry = sdfg.out_edges(candidate)
if (len(control_flow[left_entry]) > 0
or len(control_flow[right_entry]) > 0):
# Already assigned to a control flow construct
# TODO: carefully allow this in some cases
continue
left, right = left_entry.dst, right_entry.dst
dominator = dominators[left] & dominators[right]
if len(dominator) != 1:
# There must be a single dominator across both branches,
# unless one of the nodes _is_ the next dominator
# if (len(dominator) == 0 and dominators[left] == {right}
# or dominators[right] == {left}):
# dominator = dominators[left] | dominators[right]
# else:
# continue
continue
dominator = next(iter(dominator)) # Exactly one dominator
exit_edges = sdfg.in_edges(dominator)
if len(exit_edges) != 2:
# There must be a single entry and a single exit. This
# could be relaxed in the future.
continue
left_exit, right_exit = exit_edges
if (len(control_flow[left_exit]) > 0
or len(control_flow[right_exit]) > 0):
# Already assigned to a control flow construct
# TODO: carefully allow this in some cases
continue
# Now traverse from the source and verify that all possible paths
# pass through the dominator
left_nodes = sdfg.all_nodes_between(left, dominator)
if left_nodes is None:
# Not all paths lead to the next dominator
continue
right_nodes = sdfg.all_nodes_between(right, dominator)
if right_nodes is None:
# Not all paths lead to the next dominator
continue
all_nodes = left_nodes | right_nodes
# Make sure there is no overlap between left and right nodes
if len(left_nodes & right_nodes) > 0:
continue
# This is a valid if/then/else construct. Generate annotations
if_then_else = dace.graph.edges.IfThenElse(
candidate, dominator)
# Arbitrarily assign then/else to the two branches. If one edge
# has no dominator but leads to the dominator, it means there's
# only a then clause (and no else).
has_else = False
if len(dominators[left]) == 1:
then_scope = dace.graph.edges.IfThenScope(
if_then_else, left_nodes)
else_scope = dace.graph.edges.IfElseScope(
if_then_else, right_nodes)
control_flow[left_entry].append(
dace.graph.edges.IfEntry(then_scope, left_entry))
control_flow[left_exit].append(
dace.graph.edges.IfExit(then_scope, left_exit))
control_flow[right_exit].append(
dace.graph.edges.IfExit(else_scope, right_exit))
if len(dominators[right]) == 1:
control_flow[right_entry].append(
dace.graph.edges.IfEntry(else_scope, right_entry))
has_else = True
else:
then_scope = dace.graph.edges.IfThenScope(
if_then_else, right_nodes)
else_scope = dace.graph.edges.IfElseScope(
if_then_else, left_nodes)
control_flow[right_entry].append(
dace.graph.edges.IfEntry(then_scope, right_entry))
control_flow[right_exit].append(
dace.graph.edges.IfExit(then_scope, right_exit))
control_flow[left_exit].append(
dace.graph.edges.IfExit(else_scope, left_exit))
#######################################################################
# Generate actual program body
states_generated = set() # For sanity check
generated_edges = set()
self.generate_states(sdfg, "sdfg", control_flow,
global_stream, callsite_stream,
set(states_topological), states_generated,
generated_edges)
#######################################################################
# Sanity check
if len(states_generated) != len(sdfg.nodes()):
raise RuntimeError(
"Not all states were generated in SDFG {}!"
"\n Generated: {}\n Missing: {}".format(
sdfg.label, [s.label for s in states_generated],
[s.label for s in (set(sdfg.nodes()) - states_generated)]))
# Deallocate transients
shared_transients = sdfg.shared_transients()
deallocated = set()
for state in sdfg.nodes():
for node in state.data_nodes():
if (node.data in shared_transients
and node.data not in deallocated):
self._dispatcher.dispatch_deallocate(
sdfg, state, None, node, global_stream,
callsite_stream)
deallocated.add(node.data)
# Now that we have all the information about dependencies, generate
# header and footer
if is_top_level:
header_stream = CodeIOStream()
header_global_stream = CodeIOStream()
footer_stream = CodeIOStream()
footer_global_stream = CodeIOStream()
self.generate_header(sdfg, self._dispatcher.used_environments,
header_global_stream, header_stream)
# Open program function
function_signature = 'void __program_%s_internal(%s)\n{\n' % (
sdfg.name, sdfg.signature())
self.generate_footer(sdfg, self._dispatcher.used_environments,
footer_global_stream, footer_stream)
header_global_stream.write(global_stream.getvalue())
header_global_stream.write(footer_global_stream.getvalue())
generated_header = header_global_stream.getvalue()
all_code = CodeIOStream()
all_code.write(function_signature)
all_code.write(header_stream.getvalue())
all_code.write(callsite_stream.getvalue())
all_code.write(footer_stream.getvalue())
generated_code = all_code.getvalue()
else:
generated_header = global_stream.getvalue()
generated_code = callsite_stream.getvalue()
# Return the generated global and local code strings
return (generated_header, generated_code,
self._dispatcher.used_targets,
self._dispatcher.used_environments)