[Wasm GC] ReFinalize when needed in SimplifyGlobals (#5682)

1 files changed, 33 insertions, 0 deletions

diff --git a/test/lit/passes/simplify-globals-gc.wast b/test/lit/passes/simplify-globals-gc.wast
new file mode 100644
index 000000000..da49cdf61
--- /dev/null
+++ b/test/lit/passes/simplify-globals-gc.wast
@@ -0,0 +1,33 @@
+;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
+;; NOTE: This test was ported using port_passes_tests_to_lit.py and could be cleaned up.
+
+;; RUN: foreach %s %t wasm-opt --simplify-globals -all -S -o - | filecheck %s
+
+(module
+ ;; CHECK:      (type $A (func))
+ (type $A (func))
+
+ ;; CHECK:      (global $global$0 funcref (ref.func $func))
+ (global $global$0 (mut funcref) (ref.func $func))
+
+ ;; CHECK:      (elem declare func $func)
+
+ ;; CHECK:      (func $func (type $A)
+ ;; CHECK-NEXT:  (drop
+ ;; CHECK-NEXT:   (ref.cast $A
+ ;; CHECK-NEXT:    (ref.func $func)
+ ;; CHECK-NEXT:   )
+ ;; CHECK-NEXT:  )
+ ;; CHECK-NEXT: )
+ (func $func
+  (drop
+   (ref.cast null $A
+    ;; This global can be replaced with a ref.func of $func. That has a more
+    ;; refined type, so we should refinalize (if we do not, then the ref.cast
+    ;; will fail to validate as it must become a non-nullable cast).
+    (global.get $global$0)
+   )
+  )
+ )
+)
+