[reference-types] Support passive elem segments (#3572)

Passive element segments do not belong to any table, so the link between
Table and elem needs to be weaker; i.e. an elem may have a table in case
of active segments, or simply be a collection of function references in
case of passive/declarative segments.

This PR takes Table::Segment out and turns it into a first class module
element just like tables and functions. It also implements early support
for parsing, printing, encoding and decoding passive/declarative elem
segments.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/ir/utils.h b/src/ir/utils.h
index 424298bb3..f06a68fff 100644
--- a/src/ir/utils.h
+++ b/src/ir/utils.h
@@ -121,6 +121,7 @@ struct ReFinalize
   void visitExport(Export* curr);
   void visitGlobal(Global* curr);
   void visitTable(Table* curr);
+  void visitElementSegment(ElementSegment* curr);
   void visitMemory(Memory* curr);
   void visitEvent(Event* curr);
   void visitModule(Module* curr);
@@ -144,6 +145,7 @@ struct ReFinalizeNode : public OverriddenVisitor<ReFinalizeNode> {
   void visitExport(Export* curr) { WASM_UNREACHABLE("unimp"); }
   void visitGlobal(Global* curr) { WASM_UNREACHABLE("unimp"); }
   void visitTable(Table* curr) { WASM_UNREACHABLE("unimp"); }
+  void visitElementSegment(ElementSegment* curr) { WASM_UNREACHABLE("unimp"); }
   void visitMemory(Memory* curr) { WASM_UNREACHABLE("unimp"); }
   void visitEvent(Event* curr) { WASM_UNREACHABLE("unimp"); }
   void visitModule(Module* curr) { WASM_UNREACHABLE("unimp"); }