areusch commented on code in PR #11474:
URL: https://github.com/apache/tvm/pull/11474#discussion_r888358628
##########
python/tvm/relay/transform/transform.py:
##########
@@ -1386,3 +1368,51 @@ def SplitArgs(max_function_args):
The registered pass for constant folding.
"""
return _ffi_api.SplitArgs(max_function_args)
+
+
+def OutlineCompilerFunctionsWithExistingGlobalSymbols(compiler_filter=""):
+ """A pass to outline all literal functions in direct call positions which
have a "Compiler"
Review Comment:
nit: numpydoc style and pep 257 wants a one-liner summary at the beginning
of such multiline docstrings
##########
include/tvm/relay/function.h:
##########
@@ -170,19 +170,34 @@ const FunctionNode* AsOptimizableFunctionNode(const
BaseFunc& base_func);
* \brief namespace of the attributes that can be attached to a
relay::Function.
*/
namespace attr {
-/*! \brief Mark the function as a primitive function. */
+
+/*!
+ * \brief Mark the function as a primitive function. Should be bound to \p
Integer(1).
Review Comment:
this means that the function is either a PrimFunc or it is going to be
lowered to one, right? worth adding that to docs?
##########
src/relay/transforms/compiler_function_utils.cc:
##########
@@ -0,0 +1,201 @@
+/*
+ * 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.
+ */
+
+/*!
+ * \file src/relay/transforms/compiler_function_utils.cc
+ * \brief Helper passes for working with functions with the "Compiler"
attribute.
+ */
+
+#include "./compiler_function_utils.h"
+
+#include "../op/call/call.h"
+#include "tvm/relay/analysis.h"
+#include "tvm/relay/expr_functor.h"
+
+namespace tvm {
+namespace relay {
+namespace transforms {
+namespace {
+
+/*!
+ * \brief Rewrite calls to inlined "Compiler" functions to global functions.
The given
+ * module will be extended with the newly outlined functions.
+ */
+class Outliner : public MixedModeMutator {
+ public:
+ Outliner(GlobalSymbolCache* cache, std::string compiler_filter, IRModule mod)
+ : cache_(cache), compiler_filter_(std::move(compiler_filter)),
mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* function_node = new_call->op.as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ auto function = GetRef<Function>(function_node);
+ ICHECK(FreeVars(function).empty()) << "Function marked with '" <<
attr::kCompiler
+ << "' attribute should not have
free variables";
+ GlobalVar global_symbol = cache_->GetGlobalSymbol(function);
+ // Depending on the cache's implementation, two structurally equal
(but not object equal)
+ // functions may be assigned the same global symbol. If so we'll lift
it just once, but
+ // rewrite all the calls.
+ if (!mod_->ContainGlobalVar(global_symbol->name_hint)) {
+ function =
+ WithAttr(std::move(function), tvm::attr::kGlobalSymbol,
global_symbol->name_hint);
+ mod_->Add(global_symbol, function);
+ }
+ return WithFields(new_call, global_symbol);
+ }
+ }
+ return post;
+ }
+
+ private:
+ GlobalSymbolCache* cache_;
+ std::string compiler_filter_;
+ IRModule mod_;
+};
+
+/*!
+ * \brief Rewrite calls to global "Compiler" functions to use the
'call_lowered' convention.
+ */
+class CallRewriter : public MixedModeMutator {
+ public:
+ CallRewriter(std::string compiler_filter, IRModule mod)
+ : compiler_filter_(std::move(compiler_filter)), mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* global_var_node = new_call->op.as<GlobalVarNode>()) {
+ if (const auto* function_node =
+
mod_->Lookup(GetRef<GlobalVar>(global_var_node)).as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ Optional<String> opt_global_symbol =
+ function_node->GetAttr<String>(tvm::attr::kGlobalSymbol);
+ ICHECK(opt_global_symbol.defined());
+ GlobalVar global_symbol =
mod_->GetGlobalVar(opt_global_symbol.value());
+ CallLoweredAttrs attrs;
+ attrs.metadata.Set("relay_attrs", new_call->attrs);
Review Comment:
should this attr become a constant somewhere with doc?
##########
src/relay/transforms/compiler_function_utils.cc:
##########
@@ -0,0 +1,201 @@
+/*
+ * 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.
+ */
+
+/*!
+ * \file src/relay/transforms/compiler_function_utils.cc
+ * \brief Helper passes for working with functions with the "Compiler"
attribute.
+ */
+
+#include "./compiler_function_utils.h"
+
+#include "../op/call/call.h"
+#include "tvm/relay/analysis.h"
+#include "tvm/relay/expr_functor.h"
+
+namespace tvm {
+namespace relay {
+namespace transforms {
+namespace {
+
+/*!
+ * \brief Rewrite calls to inlined "Compiler" functions to global functions.
The given
+ * module will be extended with the newly outlined functions.
+ */
+class Outliner : public MixedModeMutator {
+ public:
+ Outliner(GlobalSymbolCache* cache, std::string compiler_filter, IRModule mod)
+ : cache_(cache), compiler_filter_(std::move(compiler_filter)),
mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* function_node = new_call->op.as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ auto function = GetRef<Function>(function_node);
+ ICHECK(FreeVars(function).empty()) << "Function marked with '" <<
attr::kCompiler
Review Comment:
is this a debug-style check or something we need in release?
##########
src/relay/backend/te_compiler.cc:
##########
@@ -177,7 +177,7 @@ class TECompilerImpl : public TECompilerNode {
function_node->body, function_node->ret_type,
function_node->type_params,
/* erase attributes */ DictAttrs(Map<String,
ObjectRef>()));
// Mark function as 'extern' using the "ExternalSymbol" attribute.
Review Comment:
nit: update comment (now called "Extern")
##########
src/relay/transforms/compiler_function_utils.cc:
##########
@@ -0,0 +1,201 @@
+/*
+ * 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.
+ */
+
+/*!
+ * \file src/relay/transforms/compiler_function_utils.cc
+ * \brief Helper passes for working with functions with the "Compiler"
attribute.
+ */
+
+#include "./compiler_function_utils.h"
+
+#include "../op/call/call.h"
+#include "tvm/relay/analysis.h"
+#include "tvm/relay/expr_functor.h"
+
+namespace tvm {
+namespace relay {
+namespace transforms {
+namespace {
+
+/*!
+ * \brief Rewrite calls to inlined "Compiler" functions to global functions.
The given
+ * module will be extended with the newly outlined functions.
+ */
+class Outliner : public MixedModeMutator {
+ public:
+ Outliner(GlobalSymbolCache* cache, std::string compiler_filter, IRModule mod)
+ : cache_(cache), compiler_filter_(std::move(compiler_filter)),
mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* function_node = new_call->op.as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ auto function = GetRef<Function>(function_node);
+ ICHECK(FreeVars(function).empty()) << "Function marked with '" <<
attr::kCompiler
+ << "' attribute should not have
free variables";
+ GlobalVar global_symbol = cache_->GetGlobalSymbol(function);
+ // Depending on the cache's implementation, two structurally equal
(but not object equal)
Review Comment:
in this case, how come we lookup in the cache? (asking for my ignorance)
##########
include/tvm/relay/function.h:
##########
@@ -170,19 +170,34 @@ const FunctionNode* AsOptimizableFunctionNode(const
BaseFunc& base_func);
* \brief namespace of the attributes that can be attached to a
relay::Function.
*/
namespace attr {
-/*! \brief Mark the function as a primitive function. */
+
+/*!
+ * \brief Mark the function as a primitive function. Should be bound to \p
Integer(1).
+ *
+ * Type: Integer
+ */
constexpr const char* kPrimitive = "Primitive";
+
+/*!
+ * \brief Mark the function as being 'extern', ie implemented in a
runtime::Module. Should be bound
Review Comment:
this is placed on a Function which is to be implemented by a custom
Relay-to-TIR, TIR-to-Runtime, or Relay-to-Runtime pass?
##########
src/relay/transforms/compiler_function_utils.cc:
##########
@@ -0,0 +1,201 @@
+/*
+ * 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.
+ */
+
+/*!
+ * \file src/relay/transforms/compiler_function_utils.cc
+ * \brief Helper passes for working with functions with the "Compiler"
attribute.
+ */
+
+#include "./compiler_function_utils.h"
+
+#include "../op/call/call.h"
+#include "tvm/relay/analysis.h"
+#include "tvm/relay/expr_functor.h"
+
+namespace tvm {
+namespace relay {
+namespace transforms {
+namespace {
+
+/*!
+ * \brief Rewrite calls to inlined "Compiler" functions to global functions.
The given
+ * module will be extended with the newly outlined functions.
+ */
+class Outliner : public MixedModeMutator {
+ public:
+ Outliner(GlobalSymbolCache* cache, std::string compiler_filter, IRModule mod)
+ : cache_(cache), compiler_filter_(std::move(compiler_filter)),
mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* function_node = new_call->op.as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ auto function = GetRef<Function>(function_node);
+ ICHECK(FreeVars(function).empty()) << "Function marked with '" <<
attr::kCompiler
+ << "' attribute should not have
free variables";
+ GlobalVar global_symbol = cache_->GetGlobalSymbol(function);
+ // Depending on the cache's implementation, two structurally equal
(but not object equal)
+ // functions may be assigned the same global symbol. If so we'll lift
it just once, but
+ // rewrite all the calls.
+ if (!mod_->ContainGlobalVar(global_symbol->name_hint)) {
+ function =
+ WithAttr(std::move(function), tvm::attr::kGlobalSymbol,
global_symbol->name_hint);
+ mod_->Add(global_symbol, function);
+ }
+ return WithFields(new_call, global_symbol);
+ }
+ }
+ return post;
+ }
+
+ private:
+ GlobalSymbolCache* cache_;
+ std::string compiler_filter_;
+ IRModule mod_;
+};
+
+/*!
+ * \brief Rewrite calls to global "Compiler" functions to use the
'call_lowered' convention.
+ */
+class CallRewriter : public MixedModeMutator {
+ public:
+ CallRewriter(std::string compiler_filter, IRModule mod)
+ : compiler_filter_(std::move(compiler_filter)), mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* global_var_node = new_call->op.as<GlobalVarNode>()) {
+ if (const auto* function_node =
+
mod_->Lookup(GetRef<GlobalVar>(global_var_node)).as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ Optional<String> opt_global_symbol =
+ function_node->GetAttr<String>(tvm::attr::kGlobalSymbol);
+ ICHECK(opt_global_symbol.defined());
+ GlobalVar global_symbol =
mod_->GetGlobalVar(opt_global_symbol.value());
+ CallLoweredAttrs attrs;
+ attrs.metadata.Set("relay_attrs", new_call->attrs);
+ return CallLowered(global_symbol, new_call->args, attrs,
new_call->span);
+ }
+ }
+ }
+ return post;
+ }
+
+ private:
+ std::string compiler_filter_;
+ IRModule mod_;
+};
+
+} // namespace
+
+GlobalVar ExistingGlobalSymbolCache::GetGlobalSymbol(const Function& function)
{
Review Comment:
is this the only impl of the cache?
##########
src/relay/transforms/compiler_function_utils.cc:
##########
@@ -0,0 +1,201 @@
+/*
+ * 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.
+ */
+
+/*!
+ * \file src/relay/transforms/compiler_function_utils.cc
+ * \brief Helper passes for working with functions with the "Compiler"
attribute.
+ */
+
+#include "./compiler_function_utils.h"
+
+#include "../op/call/call.h"
+#include "tvm/relay/analysis.h"
+#include "tvm/relay/expr_functor.h"
+
+namespace tvm {
+namespace relay {
+namespace transforms {
+namespace {
+
+/*!
+ * \brief Rewrite calls to inlined "Compiler" functions to global functions.
The given
+ * module will be extended with the newly outlined functions.
+ */
+class Outliner : public MixedModeMutator {
+ public:
+ Outliner(GlobalSymbolCache* cache, std::string compiler_filter, IRModule mod)
Review Comment:
can you document the various options, either here or in symbol docstrings
near their definition?
##########
src/relay/transforms/compiler_function_utils.cc:
##########
@@ -0,0 +1,201 @@
+/*
+ * 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.
+ */
+
+/*!
+ * \file src/relay/transforms/compiler_function_utils.cc
+ * \brief Helper passes for working with functions with the "Compiler"
attribute.
+ */
+
+#include "./compiler_function_utils.h"
+
+#include "../op/call/call.h"
+#include "tvm/relay/analysis.h"
+#include "tvm/relay/expr_functor.h"
+
+namespace tvm {
+namespace relay {
+namespace transforms {
+namespace {
+
+/*!
+ * \brief Rewrite calls to inlined "Compiler" functions to global functions.
The given
+ * module will be extended with the newly outlined functions.
+ */
+class Outliner : public MixedModeMutator {
+ public:
+ Outliner(GlobalSymbolCache* cache, std::string compiler_filter, IRModule mod)
+ : cache_(cache), compiler_filter_(std::move(compiler_filter)),
mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* function_node = new_call->op.as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ auto function = GetRef<Function>(function_node);
+ ICHECK(FreeVars(function).empty()) << "Function marked with '" <<
attr::kCompiler
+ << "' attribute should not have
free variables";
+ GlobalVar global_symbol = cache_->GetGlobalSymbol(function);
+ // Depending on the cache's implementation, two structurally equal
(but not object equal)
+ // functions may be assigned the same global symbol. If so we'll lift
it just once, but
+ // rewrite all the calls.
+ if (!mod_->ContainGlobalVar(global_symbol->name_hint)) {
+ function =
+ WithAttr(std::move(function), tvm::attr::kGlobalSymbol,
global_symbol->name_hint);
+ mod_->Add(global_symbol, function);
+ }
+ return WithFields(new_call, global_symbol);
+ }
+ }
+ return post;
+ }
+
+ private:
+ GlobalSymbolCache* cache_;
+ std::string compiler_filter_;
+ IRModule mod_;
+};
+
+/*!
+ * \brief Rewrite calls to global "Compiler" functions to use the
'call_lowered' convention.
+ */
+class CallRewriter : public MixedModeMutator {
+ public:
+ CallRewriter(std::string compiler_filter, IRModule mod)
+ : compiler_filter_(std::move(compiler_filter)), mod_(std::move(mod)) {}
+
+ Expr Rewrite_(const CallNode* pre, const Expr& post) final {
+ Call new_call = Downcast<Call>(post);
+ if (const auto* global_var_node = new_call->op.as<GlobalVarNode>()) {
+ if (const auto* function_node =
+
mod_->Lookup(GetRef<GlobalVar>(global_var_node)).as<FunctionNode>()) {
+ Optional<String> opt_compiler =
function_node->GetAttr<String>(attr::kCompiler);
+ if (opt_compiler.defined() &&
+ (compiler_filter_.empty() || opt_compiler.value() ==
compiler_filter_)) {
+ Optional<String> opt_global_symbol =
+ function_node->GetAttr<String>(tvm::attr::kGlobalSymbol);
+ ICHECK(opt_global_symbol.defined());
+ GlobalVar global_symbol =
mod_->GetGlobalVar(opt_global_symbol.value());
+ CallLoweredAttrs attrs;
+ attrs.metadata.Set("relay_attrs", new_call->attrs);
+ return CallLowered(global_symbol, new_call->args, attrs,
new_call->span);
+ }
+ }
+ }
+ return post;
+ }
+
+ private:
+ std::string compiler_filter_;
+ IRModule mod_;
+};
+
+} // namespace
+
+GlobalVar ExistingGlobalSymbolCache::GetGlobalSymbol(const Function& function)
{
+ Optional<String> opt_global_symbol =
function->GetAttr<String>(tvm::attr::kGlobalSymbol);
+ ICHECK(opt_global_symbol.defined())
+ << "ExistingGlobalSymbolCache requires all functions to already have a '"
+ << tvm::attr::kGlobalSymbol << "' attribute";
+ std::string global_symbol = opt_global_symbol.value();
+ auto itr = global_vars_.find(global_symbol);
+ if (itr != global_vars_.end()) {
+ return itr->second;
+ }
+ // Ok if function does not have a checked_type, but if it does capture it in
the global var.
+ GlobalVar global_var(global_symbol, function->checked_type_, function->span);
+ global_vars_.emplace(global_symbol, global_var);
+ return global_var;
+}
+
+transform::Pass OutlineCompilerFunctions(std::shared_ptr<GlobalSymbolCache>
cache,
+ std::string compiler_filter) {
+ runtime::TypedPackedFunc<IRModule(IRModule, transform::PassContext)>
pass_func =
+ [cache = std::move(cache), compiler_filter = std::move(compiler_filter)](
+ IRModule mod, transform::PassContext ctx) {
+ IRModule output_mod = GetRef<IRModule>(mod.CopyOnWrite());
+ for (const auto& kv : mod->functions) {
+ const FunctionNode* function_node =
AsOptimizableFunctionNode(kv.second);
+ if (function_node) {
+ Expr new_body =
+ Outliner(cache.get(), compiler_filter,
output_mod).VisitExpr(function_node->body);
+ Function new_function =
+ WithFields(GetRef<Function>(function_node), /*opt_params=*/{},
new_body);
+ output_mod->Add(kv.first, new_function);
+ }
+ }
+ return output_mod;
+ };
+
+ return tvm::transform::CreateModulePass(pass_func, 0,
"OutlineCompilerFunctions", {});
+}
+
+// Any Java programmers in the house?
Review Comment:
you forgot Maybe
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