From 2da008ae3b06f48485fcae50c4af76290e670958 Mon Sep 17 00:00:00 2001
From: nimlgen <138685161+nimlgen@users.noreply.github.com>
Date: Mon, 23 Mar 2026 19:31:51 +0800
Subject: [PATCH] jit: rm replan (#15433)

---
 examples/benchmark_onnx.py |  2 +-
 test/backend/test_jit.py   | 19 -------------------
 tinygrad/engine/jit.py     | 14 ++------------
 3 files changed, 3 insertions(+), 32 deletions(-)

diff --git a/examples/benchmark_onnx.py b/examples/benchmark_onnx.py
index 27568117f3..71bf7b8ed5 100644
--- a/examples/benchmark_onnx.py
+++ b/examples/benchmark_onnx.py
@@ -5,7 +5,7 @@ from extra.onnx_helpers import get_example_inputs, validate
 
 def load_onnx_model(onnx_file):
   run_onnx = OnnxRunner(onnx_file)
-  run_onnx_jit = TinyJit(lambda **kwargs: next(iter(run_onnx({k:v.to(None) for k,v in kwargs.items()}).values())), prune=True, optimize=True)
+  run_onnx_jit = TinyJit(lambda **kwargs: next(iter(run_onnx({k:v.to(None) for k,v in kwargs.items()}).values())), prune=True)
   return run_onnx_jit, run_onnx.graph_inputs
 
 if __name__ == "__main__":
diff --git a/test/backend/test_jit.py b/test/backend/test_jit.py
index d2fc3d16bb..765600d370 100644
--- a/test/backend/test_jit.py
+++ b/test/backend/test_jit.py
@@ -660,25 +660,6 @@ class TestJitFree(unittest.TestCase):
     fxn(Tensor([2]))
     self.assertEqual(x.item(), 8)
 
-  def test_replan_buffers_memory_layout(self):
-    if not hasattr(Device[Device.DEFAULT].allocator, '_offset'): raise unittest.SkipTest("replan_buffers_memory_layout useless")
-
-    ext_tensor = Tensor([1,24,23,45,1]).contiguous()
-    ext_tensor_2 = Tensor([2,2,2,2,2]).contiguous()
-    @TinyJit
-    def fxn(x:Tensor):
-      out = (x*ext_tensor_2+ext_tensor).reshape(5,1).expand(5, 100).contiguous()
-      return out.sum()
-    for i in range(5):
-      out = fxn(Tensor([i,1,2,3,4]))
-      self.assertEqual(out.item(), 11400+200*i)
-    self.assertEqual(len(set([b.base for item in fxn.captured.jit_cache for b in item.bufs if b is not None])), 4)
-    fxn.captured.replan_buffers_memory_layout()
-    self.assertEqual(len(set([b.base for item in fxn.captured.jit_cache for b in item.bufs if b is not None])), 2)
-
-    out = fxn(Tensor([11,1,2,3,4]))
-    self.assertEqual(out.item(), 13600)
-
 class TestJitGraphSplit(unittest.TestCase):
   def compute(self, device, inp):
     assert inp.device == device, f"Input device {inp.device} does not match expected {device}"
diff --git a/tinygrad/engine/jit.py b/tinygrad/engine/jit.py
index 6f4d0cdfac..ad1ece845b 100644
--- a/tinygrad/engine/jit.py
+++ b/tinygrad/engine/jit.py
@@ -190,7 +190,7 @@ class CapturedJit(Generic[ReturnType]):
   expected_input_info: list[tuple[UOp, tuple[Variable, ...], DType, str]]  # (view, variables, dtype, device) per input
 
   def __reduce__(self):
-    # TODO: free_intermediates here? replan_buffers_memory_layout here?
+    # TODO: free_intermediates here?
     return self.__class__, (self.ret, self.jit_cache, self.input_replace, self.extra_view_inputs, self.expected_names, self.expected_input_info)
 
   def __post_init__(self):
@@ -218,14 +218,6 @@ class CapturedJit(Generic[ReturnType]):
         if b._base is not None and b._base.allocated_views == 0 and b._base.is_allocated(): b._base.deallocate()
     self.__post_init__()   # reset the graph state
 
-  def replan_buffers_memory_layout(self):
-    blacklist = [t.uop.buffer for t in get_parameters(self.ret)]
-    asgn = _internal_memory_planner([[b for item in self.jit_cache for b in item.bufs if b is not None and b not in blacklist]], ignore_checks=True)
-    self.jit_cache = [replace(item, bufs=[asgn.get(b,b) if b is not None else None for b in item.bufs]) for item in self.jit_cache]
-    for old, new in asgn.items():
-      if old.is_allocated(): new.ensure_allocated().copyin(old.as_memoryview())
-    self.__post_init__()
-
   # jit exec
   def __call__(self, input_buffers:list[Buffer], var_vals:dict[str, int]) -> ReturnType:
     # assign inputs
@@ -282,13 +274,12 @@ def _prepare_jit_inputs(args, kwargs):
   return input_buffers, var_vals, names, expected_input_info
 
 class TinyJit(Generic[ReturnType]):
-  def __init__(self, fxn:Callable[..., ReturnType]|None, captured:CapturedJit|None=None, prune=False, optimize=False):
+  def __init__(self, fxn:Callable[..., ReturnType]|None, captured:CapturedJit|None=None, prune=False):
     assert fxn or captured, "need either a function or a CapturedJit"
     self.fxn = fxn
     self.captured: CapturedJit|None = captured
     self.cnt: int = 2 if self.fxn is None else 0
     self.prune = prune
-    self.optimize = optimize
 
   def add_linear(self, linear:UOp, var_vals:dict[str, int]): self._linears.append(linear)
 
@@ -367,7 +358,6 @@ class TinyJit(Generic[ReturnType]):
       for ei in jit_cache: ei.run(var_vals)
 
       self.captured = CapturedJit(ret, jit_cache, input_replace, extra_view_inputs, names, expected_input_info)
-      if self.optimize: self.captured.replan_buffers_memory_layout()
     elif self.cnt >= 2:
       # jit exec
       assert self.captured is not None