1 files changed, 510 insertions, 0 deletions
diff --git a/third_party/wasm2c/src/apply-names.cc b/third_party/wasm2c/src/apply-names.cc
new file mode 100644
index 0000000000..321e263e40
--- /dev/null
+++ b/third_party/wasm2c/src/apply-names.cc
@@ -0,0 +1,510 @@
+/*
+ * Copyright 2016 WebAssembly Community Group participants
+ *
+ * Licensed 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.
+ */
+
+#include "src/apply-names.h"
+
+#include <cassert>
+#include <cstdio>
+#include <vector>
+
+#include "src/expr-visitor.h"
+#include "src/ir.h"
+#include "src/string-view.h"
+
+namespace wabt {
+
+namespace {
+
+class NameApplier : public ExprVisitor::DelegateNop {
+ public:
+  NameApplier();
+
+  Result VisitModule(Module* module);
+
+  // Implementation of ExprVisitor::DelegateNop.
+  Result BeginBlockExpr(BlockExpr*) override;
+  Result EndBlockExpr(BlockExpr*) override;
+  Result OnBrExpr(BrExpr*) override;
+  Result OnBrIfExpr(BrIfExpr*) override;
+  Result OnBrTableExpr(BrTableExpr*) override;
+  Result OnCallExpr(CallExpr*) override;
+  Result OnRefFuncExpr(RefFuncExpr*) override;
+  Result OnCallIndirectExpr(CallIndirectExpr*) override;
+  Result OnReturnCallExpr(ReturnCallExpr*) override;
+  Result OnReturnCallIndirectExpr(ReturnCallIndirectExpr*) override;
+  Result OnGlobalGetExpr(GlobalGetExpr*) override;
+  Result OnGlobalSetExpr(GlobalSetExpr*) override;
+  Result BeginIfExpr(IfExpr*) override;
+  Result EndIfExpr(IfExpr*) override;
+  Result OnLocalGetExpr(LocalGetExpr*) override;
+  Result OnLocalSetExpr(LocalSetExpr*) override;
+  Result OnLocalTeeExpr(LocalTeeExpr*) override;
+  Result BeginLoopExpr(LoopExpr*) override;
+  Result EndLoopExpr(LoopExpr*) override;
+  Result OnDataDropExpr(DataDropExpr*) override;
+  Result OnMemoryInitExpr(MemoryInitExpr*) override;
+  Result OnElemDropExpr(ElemDropExpr*) override;
+  Result OnTableCopyExpr(TableCopyExpr*) override;
+  Result OnTableInitExpr(TableInitExpr*) override;
+  Result OnTableGetExpr(TableGetExpr*) override;
+  Result OnTableSetExpr(TableSetExpr*) override;
+  Result OnTableGrowExpr(TableGrowExpr*) override;
+  Result OnTableSizeExpr(TableSizeExpr*) override;
+  Result OnTableFillExpr(TableFillExpr*) override;
+  Result BeginTryExpr(TryExpr*) override;
+  Result EndTryExpr(TryExpr*) override;
+  Result OnCatchExpr(TryExpr*, Catch*) override;
+  Result OnDelegateExpr(TryExpr*) override;
+  Result OnThrowExpr(ThrowExpr*) override;
+  Result OnRethrowExpr(RethrowExpr*) override;
+
+ private:
+  void PushLabel(const std::string& label);
+  void PopLabel();
+  string_view FindLabelByVar(Var* var);
+  void UseNameForVar(string_view name, Var* var);
+  Result UseNameForFuncTypeVar(Var* var);
+  Result UseNameForFuncVar(Var* var);
+  Result UseNameForGlobalVar(Var* var);
+  Result UseNameForTableVar(Var* var);
+  Result UseNameForMemoryVar(Var* var);
+  Result UseNameForTagVar(Var* var);
+  Result UseNameForDataSegmentVar(Var* var);
+  Result UseNameForElemSegmentVar(Var* var);
+  Result UseNameForParamAndLocalVar(Func* func, Var* var);
+  Result VisitFunc(Index func_index, Func* func);
+  Result VisitGlobal(Global* global);
+  Result VisitTag(Tag* tag);
+  Result VisitExport(Index export_index, Export* export_);
+  Result VisitElemSegment(Index elem_segment_index, ElemSegment* segment);
+  Result VisitDataSegment(Index data_segment_index, DataSegment* segment);
+  Result VisitStart(Var* start_var);
+
+  Module* module_ = nullptr;
+  Func* current_func_ = nullptr;
+  ExprVisitor visitor_;
+  std::vector<std::string> param_and_local_index_to_name_;
+  std::vector<std::string> labels_;
+};
+
+NameApplier::NameApplier() : visitor_(this) {}
+
+void NameApplier::PushLabel(const std::string& label) {
+  labels_.push_back(label);
+}
+
+void NameApplier::PopLabel() {
+  labels_.pop_back();
+}
+
+string_view NameApplier::FindLabelByVar(Var* var) {
+  if (var->is_name()) {
+    for (int i = labels_.size() - 1; i >= 0; --i) {
+      const std::string& label = labels_[i];
+      if (label == var->name()) {
+        return label;
+      }
+    }
+    return string_view();
+  } else {
+    if (var->index() >= labels_.size()) {
+      return string_view();
+    }
+    return labels_[labels_.size() - 1 - var->index()];
+  }
+}
+
+void NameApplier::UseNameForVar(string_view name, Var* var) {
+  if (var->is_name()) {
+    assert(name == var->name());
+    return;
+  }
+
+  if (!name.empty()) {
+    var->set_name(name);
+  }
+}
+
+Result NameApplier::UseNameForFuncTypeVar(Var* var) {
+  FuncType* func_type = module_->GetFuncType(*var);
+  if (!func_type) {
+    return Result::Error;
+  }
+  UseNameForVar(func_type->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForFuncVar(Var* var) {
+  Func* func = module_->GetFunc(*var);
+  if (!func) {
+    return Result::Error;
+  }
+  UseNameForVar(func->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForGlobalVar(Var* var) {
+  Global* global = module_->GetGlobal(*var);
+  if (!global) {
+    return Result::Error;
+  }
+  UseNameForVar(global->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForTableVar(Var* var) {
+  Table* table = module_->GetTable(*var);
+  if (!table) {
+    return Result::Error;
+  }
+  UseNameForVar(table->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForMemoryVar(Var* var) {
+  Memory* memory = module_->GetMemory(*var);
+  if (!memory) {
+    return Result::Error;
+  }
+  UseNameForVar(memory->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForTagVar(Var* var) {
+  Tag* tag = module_->GetTag(*var);
+  if (!tag) {
+    return Result::Error;
+  }
+  UseNameForVar(tag->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForDataSegmentVar(Var* var) {
+  DataSegment* data_segment = module_->GetDataSegment(*var);
+  if (!data_segment) {
+    return Result::Error;
+  }
+  UseNameForVar(data_segment->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForElemSegmentVar(Var* var) {
+  ElemSegment* elem_segment = module_->GetElemSegment(*var);
+  if (!elem_segment) {
+    return Result::Error;
+  }
+  UseNameForVar(elem_segment->name, var);
+  return Result::Ok;
+}
+
+Result NameApplier::UseNameForParamAndLocalVar(Func* func, Var* var) {
+  Index local_index = func->GetLocalIndex(*var);
+  if (local_index >= func->GetNumParamsAndLocals()) {
+    return Result::Error;
+  }
+
+  std::string name = param_and_local_index_to_name_[local_index];
+  if (var->is_name()) {
+    assert(name == var->name());
+    return Result::Ok;
+  }
+
+  if (!name.empty()) {
+    var->set_name(name);
+  }
+  return Result::Ok;
+}
+
+Result NameApplier::BeginBlockExpr(BlockExpr* expr) {
+  PushLabel(expr->block.label);
+  return Result::Ok;
+}
+
+Result NameApplier::EndBlockExpr(BlockExpr* expr) {
+  PopLabel();
+  return Result::Ok;
+}
+
+Result NameApplier::BeginLoopExpr(LoopExpr* expr) {
+  PushLabel(expr->block.label);
+  return Result::Ok;
+}
+
+Result NameApplier::EndLoopExpr(LoopExpr* expr) {
+  PopLabel();
+  return Result::Ok;
+}
+
+Result NameApplier::OnDataDropExpr(DataDropExpr* expr) {
+  CHECK_RESULT(UseNameForDataSegmentVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnMemoryInitExpr(MemoryInitExpr* expr)  {
+  CHECK_RESULT(UseNameForDataSegmentVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnElemDropExpr(ElemDropExpr* expr)  {
+  CHECK_RESULT(UseNameForElemSegmentVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableCopyExpr(TableCopyExpr* expr) {
+  CHECK_RESULT(UseNameForTableVar(&expr->dst_table));
+  CHECK_RESULT(UseNameForTableVar(&expr->src_table));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableInitExpr(TableInitExpr* expr)  {
+  CHECK_RESULT(UseNameForElemSegmentVar(&expr->segment_index));
+  CHECK_RESULT(UseNameForTableVar(&expr->table_index));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableGetExpr(TableGetExpr* expr)  {
+  CHECK_RESULT(UseNameForTableVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableSetExpr(TableSetExpr* expr)  {
+  CHECK_RESULT(UseNameForTableVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableGrowExpr(TableGrowExpr* expr)  {
+  CHECK_RESULT(UseNameForTableVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableSizeExpr(TableSizeExpr* expr)  {
+  CHECK_RESULT(UseNameForTableVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnTableFillExpr(TableFillExpr* expr)  {
+  CHECK_RESULT(UseNameForTableVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnBrExpr(BrExpr* expr) {
+  string_view label = FindLabelByVar(&expr->var);
+  UseNameForVar(label, &expr->var);
+  return Result::Ok;
+}
+
+Result NameApplier::OnBrIfExpr(BrIfExpr* expr) {
+  string_view label = FindLabelByVar(&expr->var);
+  UseNameForVar(label, &expr->var);
+  return Result::Ok;
+}
+
+Result NameApplier::OnBrTableExpr(BrTableExpr* expr) {
+  for (Var& target : expr->targets) {
+    string_view label = FindLabelByVar(&target);
+    UseNameForVar(label, &target);
+  }
+
+  string_view label = FindLabelByVar(&expr->default_target);
+  UseNameForVar(label, &expr->default_target);
+  return Result::Ok;
+}
+
+Result NameApplier::BeginTryExpr(TryExpr* expr) {
+  PushLabel(expr->block.label);
+  return Result::Ok;
+}
+
+Result NameApplier::EndTryExpr(TryExpr*) {
+  PopLabel();
+  return Result::Ok;
+}
+
+Result NameApplier::OnCatchExpr(TryExpr*, Catch* expr) {
+  if (!expr->IsCatchAll()) {
+    CHECK_RESULT(UseNameForTagVar(&expr->var));
+  }
+  return Result::Ok;
+}
+
+Result NameApplier::OnDelegateExpr(TryExpr* expr) {
+  string_view label = FindLabelByVar(&expr->delegate_target);
+  UseNameForVar(label, &expr->delegate_target);
+  return Result::Ok;
+}
+
+Result NameApplier::OnThrowExpr(ThrowExpr* expr) {
+  CHECK_RESULT(UseNameForTagVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnRethrowExpr(RethrowExpr* expr) {
+  string_view label = FindLabelByVar(&expr->var);
+  UseNameForVar(label, &expr->var);
+  return Result::Ok;
+}
+
+Result NameApplier::OnCallExpr(CallExpr* expr) {
+  CHECK_RESULT(UseNameForFuncVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnRefFuncExpr(RefFuncExpr* expr) {
+  CHECK_RESULT(UseNameForFuncVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnCallIndirectExpr(CallIndirectExpr* expr) {
+  if (expr->decl.has_func_type) {
+    CHECK_RESULT(UseNameForFuncTypeVar(&expr->decl.type_var));
+  }
+  CHECK_RESULT(UseNameForTableVar(&expr->table));
+  return Result::Ok;
+}
+
+Result NameApplier::OnReturnCallExpr(ReturnCallExpr* expr) {
+  CHECK_RESULT(UseNameForFuncVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnReturnCallIndirectExpr(ReturnCallIndirectExpr* expr) {
+  if (expr->decl.has_func_type) {
+    CHECK_RESULT(UseNameForFuncTypeVar(&expr->decl.type_var));
+  }
+  CHECK_RESULT(UseNameForTableVar(&expr->table));
+  return Result::Ok;
+}
+
+Result NameApplier::OnGlobalGetExpr(GlobalGetExpr* expr) {
+  CHECK_RESULT(UseNameForGlobalVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnLocalGetExpr(LocalGetExpr* expr) {
+  CHECK_RESULT(UseNameForParamAndLocalVar(current_func_, &expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::BeginIfExpr(IfExpr* expr) {
+  PushLabel(expr->true_.label);
+  return Result::Ok;
+}
+
+Result NameApplier::EndIfExpr(IfExpr* expr) {
+  PopLabel();
+  return Result::Ok;
+}
+
+Result NameApplier::OnGlobalSetExpr(GlobalSetExpr* expr) {
+  CHECK_RESULT(UseNameForGlobalVar(&expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnLocalSetExpr(LocalSetExpr* expr) {
+  CHECK_RESULT(UseNameForParamAndLocalVar(current_func_, &expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::OnLocalTeeExpr(LocalTeeExpr* expr) {
+  CHECK_RESULT(UseNameForParamAndLocalVar(current_func_, &expr->var));
+  return Result::Ok;
+}
+
+Result NameApplier::VisitFunc(Index func_index, Func* func) {
+  current_func_ = func;
+  if (func->decl.has_func_type) {
+    CHECK_RESULT(UseNameForFuncTypeVar(&func->decl.type_var));
+  }
+
+  MakeTypeBindingReverseMapping(func->GetNumParamsAndLocals(), func->bindings,
+                                &param_and_local_index_to_name_);
+
+  CHECK_RESULT(visitor_.VisitFunc(func));
+  current_func_ = nullptr;
+  return Result::Ok;
+}
+
+Result NameApplier::VisitGlobal(Global* global) {
+  CHECK_RESULT(visitor_.VisitExprList(global->init_expr));
+  return Result::Ok;
+}
+
+Result NameApplier::VisitTag(Tag* tag) {
+  if (tag->decl.has_func_type) {
+    CHECK_RESULT(UseNameForFuncTypeVar(&tag->decl.type_var));
+  }
+  return Result::Ok;
+}
+
+Result NameApplier::VisitExport(Index export_index, Export* export_) {
+  if (export_->kind == ExternalKind::Func) {
+    UseNameForFuncVar(&export_->var);
+  }
+  return Result::Ok;
+}
+
+Result NameApplier::VisitElemSegment(Index elem_segment_index,
+                                     ElemSegment* segment) {
+  CHECK_RESULT(UseNameForTableVar(&segment->table_var));
+  CHECK_RESULT(visitor_.VisitExprList(segment->offset));
+  for (ElemExpr& elem_expr : segment->elem_exprs) {
+    if (elem_expr.kind == ElemExprKind::RefFunc) {
+      CHECK_RESULT(UseNameForFuncVar(&elem_expr.var));
+    }
+  }
+  return Result::Ok;
+}
+
+Result NameApplier::VisitDataSegment(Index data_segment_index,
+                                     DataSegment* segment) {
+  CHECK_RESULT(UseNameForMemoryVar(&segment->memory_var));
+  CHECK_RESULT(visitor_.VisitExprList(segment->offset));
+  return Result::Ok;
+}
+
+Result NameApplier::VisitStart(Var* start_var) {
+  CHECK_RESULT(UseNameForFuncVar(start_var));
+  return Result::Ok;
+}
+
+Result NameApplier::VisitModule(Module* module) {
+  module_ = module;
+  for (size_t i = 0; i < module->funcs.size(); ++i)
+    CHECK_RESULT(VisitFunc(i, module->funcs[i]));
+  for (size_t i = 0; i < module->globals.size(); ++i)
+    CHECK_RESULT(VisitGlobal(module->globals[i]));
+  for (size_t i = 0; i < module->tags.size(); ++i)
+    CHECK_RESULT(VisitTag(module->tags[i]));
+  for (size_t i = 0; i < module->exports.size(); ++i)
+    CHECK_RESULT(VisitExport(i, module->exports[i]));
+  for (size_t i = 0; i < module->elem_segments.size(); ++i)
+    CHECK_RESULT(VisitElemSegment(i, module->elem_segments[i]));
+  for (size_t i = 0; i < module->data_segments.size(); ++i)
+    CHECK_RESULT(VisitDataSegment(i, module->data_segments[i]));
+  for (size_t i = 0; i < module->starts.size(); ++i)
+    CHECK_RESULT(VisitStart(module->starts[i]));
+  module_ = nullptr;
+  return Result::Ok;
+}
+
+}  // end anonymous namespace
+
+Result ApplyNames(Module* module) {
+  NameApplier applier;
+  return applier.VisitModule(module);
+}
+
+}  // namespace wabt