Separate buck targets per operator.

Summary: Keep targets separate so we only compile the operators we need.

Reviewed By: zonglinpeng

Differential Revision: D67128598

Author: hsharma35

backends/cadence/fusion_g3/operators/targets.bzl

@@ -1,6 +1,45 @@
 load("@fbsource//tools/build_defs:platform_defs.bzl", "CXX")
 load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 
+def define_operator(name: str, deps: list[str] | None = None) -> None:
+    op_name = "op_{}".format(name)
+
+    # Deps used by all operators.
+    common_deps = [
+        "//executorch/kernels/portable/cpu/util:all_deps",
+        "//executorch/kernels/portable/cpu/pattern:all_deps",
+        "//executorch/runtime/kernel:kernel_includes",
+        "//executorch/kernels/portable/cpu:scalar_utils",
+        "fbsource//third-party/nnlib-FusionG3/xa_nnlib:libxa_nnlib_common",
+        "fbsource//third-party/nnlib-FusionG3/xa_nnlib:libxa_nnlib",
+    ]
+    if deps == None:
+        deps = []
+
+    runtime.cxx_library(
+        name = op_name,
+        srcs = [op_name + ".cpp"],
+        platforms = CXX,
+        visibility = [
+            "//executorch/backends/cadence/...",
+            "@EXECUTORCH_CLIENTS",
+        ],
+        deps = deps + common_deps,
+        exported_deps = [
+            ":operators_header",
+        ],
+    )
+
+OPERATORS = [
+    "add",
+    "cat",
+    "dequantize",
+    "mul",
+    "native_layer_norm",
+    "quantize",
+    "softmax",
+]
+
 def define_common_targets():
     """Defines targets that should be shared between fbcode and xplat.
 
@@ -11,28 +50,16 @@ def define_common_targets():
     # Define build targets for all operators registered in the tables above.
 
     runtime.cxx_library(
-        name = "cadence_g3_ops",
-        srcs = glob([
-            "*.cpp",
-        ]),
-        exported_headers = glob([
-            "*.h",
-        ]),
-        platforms = CXX,
-        deps = [
-            "//executorch/kernels/portable/cpu/util:all_deps",
-            "//executorch/kernels/portable/cpu/pattern:all_deps",
-            "//executorch/runtime/kernel:kernel_includes",
-            "//executorch/kernels/portable/cpu:scalar_utils",
-            "fbsource//third-party/nnlib-FusionG3/xa_nnlib:libxa_nnlib_common",
-            "fbsource//third-party/nnlib-FusionG3/xa_nnlib:libxa_nnlib",
-        ],
+        name = "operators_header",
+        exported_headers = ["operators.h"],
         visibility = [
             "//executorch/backends/cadence/...",
-            "@EXECUTORCH_CLIENTS",
         ],
         exported_deps = [
-            "fbsource//third-party/nnlib-FusionG3/xa_nnlib:libxa_nnlib_common",
-            "fbsource//third-party/nnlib-FusionG3/xa_nnlib:libxa_nnlib",
+            "//executorch/runtime/core/exec_aten:lib",
+            "//executorch/runtime/kernel:kernel_runtime_context",
         ],
     )
+
+    for op in OPERATORS:
+        define_operator(op)