1 files changed, 77 insertions, 0 deletions
diff --git a/third_party/wasm2c/include/wabt/ir-util.h b/third_party/wasm2c/include/wabt/ir-util.h
new file mode 100644
index 0000000000..7d06121902
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+++ b/third_party/wasm2c/include/wabt/ir-util.h
@@ -0,0 +1,77 @@
+/*
+ * 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.
+ */
+
+#ifndef WABT_IR_UTIL_H_
+#define WABT_IR_UTIL_H_
+
+#include "wabt/common.h"
+#include "wabt/ir.h"
+
+namespace wabt {
+
+struct Label {
+  Label(LabelType label_type,
+        const std::string& name,
+        const TypeVector& param_types,
+        const TypeVector& result_types)
+      : name(name),
+        label_type(label_type),
+        param_types(param_types),
+        result_types(result_types) {}
+
+  std::string name;
+  LabelType label_type;
+  TypeVector param_types;
+  TypeVector result_types;
+};
+
+struct ModuleContext {
+  ModuleContext(const Module& module) : module(module) {}
+
+  Index GetLabelStackSize() const { return label_stack_.size(); }
+  const Label* GetLabel(const Var& var) const;
+  Index GetLabelArity(const Var& var) const;
+  void SetTopLabelType(LabelType label_type) {
+    label_stack_.back().label_type = label_type;
+  }
+
+  Index GetFuncParamCount(const Var& var) const;
+  Index GetFuncResultCount(const Var& var) const;
+
+  void BeginBlock(LabelType label_type, const Block& block);
+  void EndBlock();
+  void BeginFunc(const Func& func);
+  void EndFunc();
+
+  struct Arities {
+    Index nargs;
+    Index nreturns;
+    bool unreachable;
+    Arities(Index na, Index nr, bool ur = false)
+        : nargs(na), nreturns(nr), unreachable(ur) {}
+  };
+  Arities GetExprArity(const Expr& expr) const;
+
+  const Module& module;
+
+ private:
+  const Func* current_func_ = nullptr;
+  std::vector<Label> label_stack_;
+};
+
+}  // namespace wabt
+
+#endif /* WABT_IR_UTIL_H_ */