def __init__(self, parent, ptr, cmp, val, ordering, failordering, name):
outtype = types.LiteralStructType([val.type, types.IntType(1)])
super(CmpXchg, self).__init__(
parent, outtype, "cmpxchg", (ptr, cmp, val), name=name
)
self.ordering = ordering
self.failordering = failordering
def wrapped(self, lhs, rhs, name=""):
if lhs.type != rhs.type:
raise ValueError(
"Operands must be the same type, got (%s, %s)" %
(lhs.type, rhs.type))
ty = lhs.type
if not isinstance(ty, types.IntType):
raise TypeError("expected an integer type, got %s" % (ty, ))
bool_ty = types.IntType(1)
mod = self.module
fnty = types.FunctionType(types.LiteralStructType([ty, bool_ty]),
[ty, ty])
fn = mod.declare_intrinsic("llvm.%s.with.overflow" % (opname, ),
[ty], fnty)
ret = self.call(fn, [lhs, rhs], name=name)
return ret
def literal_struct(cls, elems):
"""
Construct a literal structure constant made of the given members.
"""
tys = [el.type for el in elems]
return cls(types.LiteralStructType(tys), elems)
