alexbooth commented on a change in pull request #5272: [BYOC] Add example of
Composite + Annotate for DNNL fused op
URL: https://github.com/apache/incubator-tvm/pull/5272#discussion_r405843653
##########
File path: src/relay/backend/utils.h
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@@ -152,8 +152,35 @@ inline bool IsOp(const CallNode* call, const std::string&
op_name) {
Op op = GetRef<Op>(op_node);
return op == Op::Get(op_name);
}
+
+/*!
+ * \brief Retrieve the "root" conv2d op nested inside a fused call, such as
conv2d + relu.
+ * \param call A Relay call node. Typically nn.relu when called the first time.
+ * \param depth The number of calls before conv2d call, counting from
current_call.
+ * \param expected_op_names The names of ops in this fused call. Example:
{"nn.conv2d", "add",
+ * "nn.relu"}
+ * \return conv2d op at the root
+ */
+
+inline const CallNode* GetRootConv2DCall(const CallNode* current_call, int
depth,
+ const std::vector<std::string>&
expected_op_names) {
+ CHECK(current_call && depth >= 0);
+
+ if (depth == 0) {
+ CHECK(IsOp(current_call, "nn.conv2d"));
+ return current_call;
+ }
+
+ CHECK(depth < expected_op_names.size() && IsOp(current_call,
expected_op_names[depth]));
+ CHECK_GT(current_call->args.size(), 0);
+
+ const auto* next_call = current_call->args[0].as<CallNode>();
+ return GetRootConv2DCall(next_call, depth - 1, expected_op_names);
+}
Review comment:
I'm not incredibly familiar with majority of relay ops, but would it be safe
to also modify this to "GetRootCall" in the case where the root composite call
is something other than "nn.conv2d" ("nn.dense" for example) ?
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