Update rethrow depth handling and catch_all opcode (#1608)

Give `catch_all` its own opcode:

Previously `catch_all` shared an opcode with `else`, but
the spec now allocates it the 0x19 opcode.

Adjust rethrow depth semantics:

Previously this had interpreted the rethrow depth argument
as counting only catch blocks, but the spec has clarified that
it should count all blocks (in a similar fashion as `br` and
related instructions).

1 files changed, 6 insertions, 0 deletions

diff --git a/src/binary-reader.cc b/src/binary-reader.cc
index 495de306..9b365e87 100644
--- a/src/binary-reader.cc
+++ b/src/binary-reader.cc
@@ -1341,6 +1341,12 @@ Result BinaryReader::ReadFunctionBody(Offset end_offset) {
         break;
       }
 
+      case Opcode::CatchAll: {
+        CALLBACK(OnCatchAllExpr);
+        CALLBACK(OnOpcodeBare);
+        break;
+      }
+
       case Opcode::Unwind: {
         CALLBACK0(OnUnwindExpr);
         CALLBACK0(OnOpcodeBare);