class StatementNode(object):
"""
A statement in the body of a function.
All statements assign a variable to the result of an expression.
"""
def __init__(self, vplnode, consts, named_vars):
name = vplnode.children[0].text
try:
self.var = named_vars[name]
except NameError:
raise VPLSyntaxError("Undeclared variable '{0}'".format(name))
self.expr = ExprNode(vplnode.children[1], consts, named_vars, 0)
# naive tmps_needed solution
max_depth = self.expr.chain_depth
self.tmps_needed = int(max_depth)
def validate(self, named_vars, tmp_vars):
self.var.validate(named_vars, tmp_vars)
self.expr.validate(named_vars, tmp_vars)
def generate(self):
yield "# assign to {0} the value of {1}".format(
self.var.name,
repr(self.expr))
# evaluate expression
for line in self.expr.generate():
yield line
yield MOVQ_RAX_R10
# load address of variable to be assigned
for line in self.var.generate(load_to='%rax'):
yield line
yield assign('%r10', '%rax', from_const=self.expr.is_const)
def __repr__(self):
return "(ASSIGN {0} {1})".format(
self.var,
self.expr,
)
def __init__(self, vplnode, consts, named_vars):
name = vplnode.children[0].text
try:
self.var = named_vars[name]
except NameError:
raise VPLSyntaxError("Undeclared variable '{0}'".format(name))
self.expr = ExprNode(vplnode.children[1], consts, named_vars, 0)
# naive tmps_needed solution
max_depth = self.expr.chain_depth
self.tmps_needed = int(max_depth)