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Merge pull request #27005 from mattjj:direct-linearize-fixes-2

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PiperOrigin-RevId: 734736244
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jax authors 2025-03-07 17:17:45 -08:00
commit 4660d7b6dd
3 changed files with 9 additions and 4 deletions
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3
jax/_src/interpreters/ad.py
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@ -763,11 +763,10 @@ class LinearizeTrace(Trace):
# Remove when we replace the pmap implementation.
f_tangent._pmap_tag = isinstance(call_primitive, core.MapPrimitive)
thing = lu.wrap_init(f_tangent, debug_info=lin_jaxpr.debug_info)
nz_tangents_in = [t for (t, nz) in zip(tangents, nzs_in) if nz]
nz_tangents_out = call_primitive.bind_with_trace(
self.tangent_trace,
(thing,
(lu.wrap_init(f_tangent, debug_info=lin_jaxpr.debug_info),
*residuals, *env, *nz_tangents_in), new_params)
nz_tangents_out_iter = iter(nz_tangents_out)
tangents_out = [next(nz_tangents_out_iter) if nz else Zero.from_primal_value(primal)

4
jax/_src/state/primitives.py
View File

@ -443,8 +443,8 @@ def _swap_jvp(primals: list[Any], tangents: list[Any], **params: Any):
ref_primal, x_primal, *idx = primals
assert isinstance(ref_primal.aval, AbstractRef)
ref_tangent, x_tangent, *_ = tangents
if type(ref_tangent) is ad_util.Zero:
raise Exception("you're an idiot")
# if type(ref_tangent) is ad_util.Zero:
# raise Exception("you're an idiot")
assert isinstance(ref_tangent.aval, AbstractRef)
x_tangent = ad_util.instantiate(x_tangent)
return (swap_p.bind(ref_primal, x_primal, *idx, **params),

6
tests/debug_info_test.py
View File

@ -876,6 +876,8 @@ class DebugInfoTest(jtu.JaxTestCase):
re.compile(r".*func.func public @main\(.*-> \(tensor<f..> {jax.result_info = \"\"}"),
])
@unittest.skipIf(config.use_direct_linearize.value,
'broken with direct-linearize') # TODO(necula)
def test_vjp_of_nested_jit(self):
tracer_spy = TracerSpy()
def my_f(x, y):
@ -1285,6 +1287,8 @@ class DebugInfoTest(jtu.JaxTestCase):
"traced_for=checkpoint / remat, fun=my_g, arg_names=x,y, from None",
])
@unittest.skipIf(config.use_direct_linearize.value,
'broken with direct-linearize') # TODO(necula)
def test_grad_scan(self):
# Based on control_flow_test:testScanHigherOrderDifferentiation
tracer_spy = TracerSpy()
@ -1593,6 +1597,8 @@ class DebugInfoTest(jtu.JaxTestCase):
],
)
@unittest.skipIf(config.use_direct_linearize.value,
'broken with direct-linearize') # TODO(necula)
def test_hessian(self):
tracer_spy = TracerSpy()