[Wasm GC] ArrayInit support (#4138)

array.init is like array.new_with_rtt except that it takes
as arguments the values to initialize the array with (as opposed to
a size and an optional initial value).

Spec: https://docs.google.com/document/d/1afthjsL_B9UaMqCA5ekgVmOm75BVFu6duHNsN9-gnXw/edit#

1 files changed, 6 insertions, 0 deletions

diff --git a/src/wasm/wasm-stack.cpp b/src/wasm/wasm-stack.cpp
index 7b682a264..e5460cf6f 100644
--- a/src/wasm/wasm-stack.cpp
+++ b/src/wasm/wasm-stack.cpp
@@ -2040,6 +2040,12 @@ void BinaryInstWriter::visitArrayNew(ArrayNew* curr) {
   parent.writeIndexedHeapType(curr->rtt->type.getHeapType());
 }
 
+void BinaryInstWriter::visitArrayInit(ArrayInit* curr) {
+  o << int8_t(BinaryConsts::GCPrefix) << U32LEB(BinaryConsts::ArrayInit);
+  parent.writeIndexedHeapType(curr->rtt->type.getHeapType());
+  o << U32LEB(curr->values.size());
+}
+
 void BinaryInstWriter::visitArrayGet(ArrayGet* curr) {
   auto heapType = curr->ref->type.getHeapType();
   const auto& field = heapType.getArray().element;