mbs-octoml commented on code in PR #11474:
URL: https://github.com/apache/tvm/pull/11474#discussion_r887412903


##########
tests/python/relay/transform/test_compiler_function_utils.py:
##########
@@ -0,0 +1,162 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License
+"""Unit tests for the OutlineCompilerFunctionsWithExistingGlobalSymbols and
+   MarkCompilerFunctionsAsExtern external codegen helper passes."""
+
+import tvm
+import tvm.testing
+import numpy as np
+
+
+def make_const(dtype, shape):
+    return tvm.relay.const(np.random.rand(*shape).astype(dtype))
+
+
+def make_consts(dtype, shapes):
+    return [make_const(dtype, shape) for shape in shapes]
+
+
+metatable = {
+    "relay.Constant": make_consts(
+        "float16",
+        [
+            (2304, 768),  # 0
+            (2304,),  # 1
+            (600, 32, 64),  # 2
+        ],
+    ),
+    "attributes": [{"relay_attrs": None}],
+}
+
+
+def inlined_mod():
+    return tvm.parser.parse(
+        """
+        #[version = "0.0.5"]
+        def @main(%x0 : Tensor[(1600, 768), float16], %x3 : Tensor[(600, 32, 
64), float16]) -> (Tensor[(1600, 2304), float16], Tensor[(600, 32, 32), 
float16]) {
+          %0 = fn(%y_0_i0: Tensor[(1600, 768), float16], %y_0_i1: 
Tensor[(2304, 768), float16], %y_0_i2: Tensor[(2304), float16],
+                  Inline=1, Compiler="cutlass", 
global_symbol="tvmgen_default_cutlass_main_0", Primitive=1) -> Tensor[(1600, 
2304), float16] {
+            %4 = fn (%FunctionVar_0_0: Tensor[(1600, 768), float16], 
%FunctionVar_0_1: Tensor[(2304, 768), float16], %FunctionVar_0_2: 
Tensor[(2304), float16],
+                     PartitionedFromPattern="nn.dense_add_", 
Composite="cutlass.dense_bias") -> Tensor[(1600, 2304), float16] {
+              %5 = nn.dense(%FunctionVar_0_0, %FunctionVar_0_1, units=2304);
+              add(%5, %FunctionVar_0_2)
+            };
+            %4(%y_0_i0, %y_0_i1, %y_0_i2)
+          };
+          %1 = %0(%x0, meta[relay.Constant][0], meta[relay.Constant][1]);
+          %2 = fn(%y_3_i0: Tensor[(600, 32, 64), float16], %y_3_i1: 
Tensor[(600, 32, 64), float16],
+                  Inline=1, Compiler="cublas", 
global_symbol="tvmgen_default_cublas_main_3", Primitive=1) -> Tensor[(600, 32, 
32), float16] {
+            %6 = fn (%FunctionVar_0_01: Tensor[(600, 32, 64), float16], 
%FunctionVar_0_11: Tensor[(600, 32, 64), float16],
+                     PartitionedFromPattern="nn.batch_matmul_", 
Composite="cublas.batch_matmul") -> Tensor[(600, 32, 32), float16] {
+              nn.batch_matmul(%FunctionVar_0_01, %FunctionVar_0_11, 
out_dtype="float16", transpose_b=True)
+            };
+            %6(%y_3_i0, %y_3_i1)
+          };
+          %3 = %2(%x3, meta[relay.Constant][2]);
+          (%1, %3)
+        }
+        """,
+        "from_string",
+        None,
+        metatable,
+    )
+
+
+def expected_outlined_mod():
+    return tvm.parser.parse(
+        """
+        #[version = "0.0.5"]
+        def @main(%x0 : Tensor[(1600, 768), float16], %x3 : Tensor[(600, 32, 
64), float16]) -> (Tensor[(1600, 2304), float16], Tensor[(600, 32, 32), 
float16]) {
+          %1 = @tvmgen_default_cutlass_main_0(%x0, meta[relay.Constant][0], 
meta[relay.Constant][1]);
+          %2 = fn(%y_3_i0: Tensor[(600, 32, 64), float16], %y_3_i1: 
Tensor[(600, 32, 64), float16],
+                  Inline=1, Compiler="cublas", 
global_symbol="tvmgen_default_cublas_main_3", Primitive=1) -> Tensor[(600, 32, 
32), float16] {
+            %6 = fn (%FunctionVar_0_01: Tensor[(600, 32, 64), float16], 
%FunctionVar_0_11: Tensor[(600, 32, 64), float16],
+                     PartitionedFromPattern="nn.batch_matmul_", 
Composite="cublas.batch_matmul") -> Tensor[(600, 32, 32), float16] {
+              nn.batch_matmul(%FunctionVar_0_01, %FunctionVar_0_11, 
out_dtype="float16", transpose_b=True)
+            };
+            %6(%y_3_i0, %y_3_i1)
+          };
+          %3 = %2(%x3, meta[relay.Constant][2]);
+          (%1, %3)
+        }
+        
+        def @tvmgen_default_cutlass_main_0(%y_0_i0: Tensor[(1600, 768), 
float16], %y_0_i1: Tensor[(2304, 768), float16], %y_0_i2: Tensor[(2304), 
float16],
+                  Inline=1, Compiler="cutlass", 
global_symbol="tvmgen_default_cutlass_main_0", Primitive=1) -> Tensor[(1600, 
2304), float16] {
+          %4 = fn (%FunctionVar_0_0: Tensor[(1600, 768), float16], 
%FunctionVar_0_1: Tensor[(2304, 768), float16], %FunctionVar_0_2: 
Tensor[(2304), float16],
+                   PartitionedFromPattern="nn.dense_add_", 
Composite="cutlass.dense_bias") -> Tensor[(1600, 2304), float16] {
+            %5 = nn.dense(%FunctionVar_0_0, %FunctionVar_0_1, units=2304);
+            add(%5, %FunctionVar_0_2)
+          };
+          %4(%y_0_i0, %y_0_i1, %y_0_i2)
+        }
+        """,
+        "from_string",
+        None,
+        metatable,
+    )
+
+
+def expected_extern_mod():
+    return tvm.parser.parse(
+        """
+        #[version = "0.0.5"]
+        def @main(%x0 : Tensor[(1600, 768), float16], %x3 : Tensor[(600, 32, 
64), float16]) -> (Tensor[(1600, 2304), float16], Tensor[(600, 32, 32), 
float16]) {
+          %1 = call_lowered(@tvmgen_default_cutlass_main_0, (%x0, 
meta[relay.Constant][0], meta[relay.Constant][1]), 
metadata=meta[attributes][0]);
+          %2 = fn(%y_3_i0: Tensor[(600, 32, 64), float16], %y_3_i1: 
Tensor[(600, 32, 64), float16],
+                  Inline=1, Compiler="cublas", 
global_symbol="tvmgen_default_cublas_main_3", Primitive=1) -> Tensor[(600, 32, 
32), float16] {
+            %6 = fn (%FunctionVar_0_01: Tensor[(600, 32, 64), float16], 
%FunctionVar_0_11: Tensor[(600, 32, 64), float16],
+                     PartitionedFromPattern="nn.batch_matmul_", 
Composite="cublas.batch_matmul") -> Tensor[(600, 32, 32), float16] {
+              nn.batch_matmul(%FunctionVar_0_01, %FunctionVar_0_11, 
out_dtype="float16", transpose_b=True)
+            };
+            %6(%y_3_i0, %y_3_i1)
+          };
+          %3 = %2(%x3, meta[relay.Constant][2]);
+          (%1, %3)
+        }
+        
+        def @tvmgen_default_cutlass_main_0(%y_0_i0: Tensor[(1600, 768), 
float16], %y_0_i1: Tensor[(2304, 768), float16], %y_0_i2: Tensor[(2304), 
float16],
+                  Extern=1) -> Tensor[(1600, 2304), float16] {
+          %4 = fn (%FunctionVar_0_0: Tensor[(1600, 768), float16], 
%FunctionVar_0_1: Tensor[(2304, 768), float16], %FunctionVar_0_2: 
Tensor[(2304), float16],
+                   PartitionedFromPattern="nn.dense_add_", 
Composite="cutlass.dense_bias") -> Tensor[(1600, 2304), float16] {

Review Comment:
   The "Primitive=1" attribute is a generic way to indicate 'this function 
represents a sub-graph which is to be lowered/compiled as a unit'. The 
additional "Compiler=foo" attributes indicates foo is the one doing the 
compiling, otherwise it's TVM. That kind makes sense.
   
   The "PartitionedFromPattern" and "Composite" duplication seems unnecessary 
to me. Why not just use "PartitionedFromPattern"? The latter is always exactly 
equal to the former as per merge_composite.cc.
   



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