[Wasm GC] Add experimental array.copy (#3911)

Spec for it is here:

https://docs.google.com/document/d/1DklC3qVuOdLHSXB5UXghM_syCh-4cMinQ50ICiXnK3Q/edit#

Also reorder some things in wasm.h that were not in the canonical order (that has
no effect, but it is confusing to read).

1 files changed, 11 insertions, 0 deletions

diff --git a/src/passes/Print.cpp b/src/passes/Print.cpp
index 9f283ddcc..df408fdf3 100644
--- a/src/passes/Print.cpp
+++ b/src/passes/Print.cpp
@@ -2005,6 +2005,17 @@ struct PrintExpressionContents
     printMedium(o, "array.len ");
     TypeNamePrinter(o, wasm).print(curr->ref->type.getHeapType());
   }
+  void visitArrayCopy(ArrayCopy* curr) {
+    if (curr->srcRef->type == Type::unreachable ||
+        curr->destRef->type == Type::unreachable) {
+      printUnreachableReplacement();
+      return;
+    }
+    printMedium(o, "array.copy ");
+    TypeNamePrinter(o, wasm).print(curr->destRef->type.getHeapType());
+    o << ' ';
+    TypeNamePrinter(o, wasm).print(curr->srcRef->type.getHeapType());
+  }
   void visitRefAs(RefAs* curr) {
     switch (curr->op) {
       case RefAsNonNull: