[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, 7 insertions, 0 deletions

diff --git a/src/ir/cost.h b/src/ir/cost.h
index 63424c8b3..e3e6aebf3 100644
--- a/src/ir/cost.h
+++ b/src/ir/cost.h
@@ -606,6 +606,13 @@ struct CostAnalyzer : public OverriddenVisitor<CostAnalyzer, CostType> {
   CostType visitArrayNew(ArrayNew* curr) {
     return 4 + visit(curr->rtt) + visit(curr->size) + maybeVisit(curr->init);
   }
+  CostType visitArrayInit(ArrayInit* curr) {
+    CostType ret = 4 + visit(curr->rtt);
+    for (auto* child : curr->values) {
+      ret += visit(child);
+    }
+    return ret;
+  }
   CostType visitArrayGet(ArrayGet* curr) {
     return 1 + nullCheckCost(curr->ref) + visit(curr->ref) + visit(curr->index);
   }