Reorder i31ref and dataref (#3509)

The binary spec
(https://docs.google.com/document/d/1yAWU3dbs8kUa_wcnnirDxUu9nEBsNfq0Xo90OWx6yuo/edit#)
lists `dataref` after `i31ref`, and `dataref` also comes after `i31ref`
in its binary code in the value-increasing order. This reorders these
two in wasm-type.h and other places, although in most of those places
the order is irrelevant.

This also adds C and JS API for `dataref`.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/passes/FuncCastEmulation.cpp b/src/passes/FuncCastEmulation.cpp
index 7f7721706..a9302fb65 100644
--- a/src/passes/FuncCastEmulation.cpp
+++ b/src/passes/FuncCastEmulation.cpp
@@ -65,8 +65,8 @@ static Expression* toABI(Expression* value, Module* module) {
     case Type::externref:
     case Type::anyref:
     case Type::eqref:
-    case Type::dataref:
-    case Type::i31ref: {
+    case Type::i31ref:
+    case Type::dataref: {
       WASM_UNREACHABLE("reference types cannot be converted to i64");
     }
     case Type::none: {
@@ -111,8 +111,8 @@ static Expression* fromABI(Expression* value, Type type, Module* module) {
     case Type::externref:
     case Type::anyref:
     case Type::eqref:
-    case Type::dataref:
-    case Type::i31ref: {
+    case Type::i31ref:
+    case Type::dataref: {
       WASM_UNREACHABLE("reference types cannot be converted from i64");
     }
     case Type::none: {