add stacking framework

decompiler/IR2/expression_build.cpp

@@ -0,0 +1,27 @@
+#include "expression_build.h"
+#include "decompiler/Function/Function.h"
+#include "decompiler/IR2/Form.h"
+#include "decompiler/IR2/FormStack.h"
+
+namespace decompiler {
+bool convert_to_expressions(Form* top_level_form, FormPool& pool, const Function& f) {
+  assert(top_level_form);
+
+  try {
+    top_level_form->apply_form([&](Form* form) {
+      FormStack stack;
+      for (auto& entry : form->elts()) {
+        entry->push_to_stack(f.ir2.env, stack);
+      }
+      auto new_entries = stack.rewrite(pool);
+      form->clear();
+      for (auto x : new_entries) {
+        form->push_back(x);
+      }
+    });
+  } catch (std::exception& e) {
+    return false;
+  }
+  return true;
+}
+}  // namespace decompiler