2 files changed, 9 insertions, 1 deletions
diff --git a/src/codegen/c.zig b/src/codegen/c.zig
index 3e47637c76..988576a6f1 100644
--- a/src/codegen/c.zig
+++ b/src/codegen/c.zig
@@ -1758,6 +1758,9 @@ fn genBody(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail, OutO
             .wrap_errunion_payload       => try airWrapErrUnionPay(f, inst),
             .wrap_errunion_err           => try airWrapErrUnionErr(f, inst),
             .errunion_payload_ptr_set    => try airErrUnionPayloadPtrSet(f, inst),
+
+            .wasm_memory_size => unreachable,
+            .wasm_memory_grow => unreachable,
             // zig fmt: on
         };
         switch (result_value) {
diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index a22d8e01b0..3e1be05d55 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -3478,7 +3478,12 @@ pub const FuncGen = struct {
 
     fn airWasmMemorySize(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {
         _ = inst;
-        return self.todo("`@wasmMemorySize()`", .{});
+        return self.todo("implement builtin `@wasmMemorySize()`", .{});
+    }
+
+    fn airWasmMemoryGrow(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {
+        _ = inst;
+        return self.todo("implement builtin `@wasmMemoryGrow()`", .{});
     }
 
     fn airMin(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {