feat(optimization): support more fusing topologies

- corrected docstring that was mistaken on what was returned
- updated pyproject.toml to ignore warnings that happened naturally in
networkx and that was blocking proper test execution (no way around that
this is code from networkx that triggered the warning)
- add a test case for the newly supported fusing topology

closes #499

tests/common/optimization/test_float_fusing.py

@@ -27,6 +27,34 @@ def no_fuse_unhandled(x, y):
     return intermediate.astype(numpy.int32)
 
 
+def fusable_with_bigger_search(x, y):
+    """fusable with bigger search"""
+    x = x + 1
+    x_1 = x.astype(numpy.int32)
+    x_1 = x_1 + 1.5
+    x_2 = x.astype(numpy.int32)
+    x_2 = x_2 + 3.4
+    add = x_1 + x_2
+    add_int = add.astype(numpy.int32)
+    return add_int + y
+
+
+def fusable_with_bigger_search_needs_second_iteration(x, y):
+    """fusable with bigger search and triggers a second iteration in the fusing"""
+    x = x + 1
+    x = x + 0.5
+    x = numpy.cos(x)
+    x_1 = x.astype(numpy.int32)
+    x_1 = x_1 + 1.5
+    x_p = x + 1
+    x_p2 = x_p + 1
+    x_2 = (x_p + x_p2).astype(numpy.int32)
+    x_2 = x_2 + 3.4
+    add = x_1 + x_2
+    add_int = add.astype(numpy.int32)
+    return add_int + y
+
+
 def no_fuse_big_constant_3_10_10(x):
     """Pass an array x with size < 100 to trigger a no fuse condition."""
     x = x.astype(numpy.float64)
@@ -177,6 +205,20 @@ return %7
             """.strip(),  # noqa: E501 # pylint: disable=line-too-long
             id="no_fuse_unhandled",
         ),
+        pytest.param(
+            fusable_with_bigger_search,
+            True,
+            get_func_params_int32(fusable_with_bigger_search),
+            None,
+            id="fusable_with_bigger_search",
+        ),
+        pytest.param(
+            fusable_with_bigger_search_needs_second_iteration,
+            True,
+            get_func_params_int32(fusable_with_bigger_search_needs_second_iteration),
+            None,
+            id="fusable_with_bigger_search",
+        ),
         pytest.param(
             no_fuse_dot,
             False,