[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, 8 insertions, 0 deletions

diff --git a/src/wasm-builder.h b/src/wasm-builder.h
index 3eb263580..018b0bf8b 100644
--- a/src/wasm-builder.h
+++ b/src/wasm-builder.h
@@ -840,6 +840,14 @@ public:
     ret->finalize();
     return ret;
   }
+  ArrayInit* makeArrayInit(Expression* rtt,
+                           const std::vector<Expression*>& values) {
+    auto* ret = wasm.allocator.alloc<ArrayInit>();
+    ret->rtt = rtt;
+    ret->values.set(values);
+    ret->finalize();
+    return ret;
+  }
   ArrayGet*
   makeArrayGet(Expression* ref, Expression* index, bool signed_ = false) {
     auto* ret = wasm.allocator.alloc<ArrayGet>();