def init(self) -> None:
builder = self.builder
# Create a register to store the state of the loop index and
# initialize this register along with the loop index to 0.
zero = builder.add(LoadInt(0))
self.index_reg = builder.maybe_spill_assignable(zero)
self.index_target = builder.get_assignment_target(
self.index) # type: Union[Register, AssignmentTarget]
builder.assign(self.index_target, zero, self.line)
def init(self, start_reg: Value, end_reg: Value, step: int) -> None:
builder = self.builder
self.start_reg = start_reg
self.end_reg = end_reg
self.step = step
self.end_target = builder.maybe_spill(end_reg)
self.index_reg = builder.maybe_spill_assignable(start_reg)
# Initialize loop index to 0. Assert that the index target is assignable.
self.index_target = builder.get_assignment_target(
self.index) # type: Union[Register, AssignmentTarget]
builder.assign(self.index_target, builder.read(self.index_reg, self.line), self.line)
def init(self, expr_reg: Value, target_type: RType, reverse: bool) -> None:
builder = self.builder
self.reverse = reverse
# Define target to contain the expression, along with the index that will be used
# for the for-loop. If we are inside of a generator function, spill these into the
# environment class.
self.expr_target = builder.maybe_spill(expr_reg)
if not reverse:
index_reg = builder.add(LoadInt(0))
else:
index_reg = builder.binary_op(self.load_len(), builder.add(LoadInt(1)), '-', self.line)
self.index_target = builder.maybe_spill_assignable(index_reg)
self.target_type = target_type