def visitCMPLInstr(self, n):
global spilled
global unspillable
# What a pain, the right-hand operand can't be a constant!
left = n.rhs[0]
right = n.rhs[1]
if not ((is_memory_access(left, self.color) and \
is_memory_access(right, self.color)) or \
isinstance(right, Const)):
return [n]
elif not isinstance(left, Const) and isinstance(right, Const):
return [CMPLInstr(None, [right, left])]
else:
spilled[0] = True
if debug:
print 'need to introduce spill code for ' + repr(n)
if in_register(left, self.color):
new_left = left
left_instr = []
else:
tmp = generate_name('tmp')
unspillable[0] = unspillable[0] + [tmp]
new_left = Name(tmp)
left_instr = [IntMoveInstr(new_left, [left])]
if is_memory_access(right, self.color):
tmp = generate_name('tmp')
unspillable[0] = unspillable[0] + [tmp]
new_right = Name(tmp)
right_instr = [IntMoveInstr(new_right, [right])]
else:
new_right = right
right_instr = []
return left_instr + right_instr + [CMPLInstr(None, [new_left, new_right])]
def visitIntMoveZeroExtendInstr(self, n):
global spilled
global unspillable
if in_register(n.lhs, self.color):
return [n]
else:
spilled[0] = True
if debug:
print 'need to introduce spill code for ' + repr(n)
tmp = generate_name('tmp')
unspillable[0] = unspillable[0] + [tmp]
return [IntMoveZeroExtendInstr(Name(tmp), [n.rhs[0]]),
IntMoveInstr(n.lhs, [Name(tmp)])]