ARM64: Enable shorten-64-to-32 warning

test/cctest/test-utils-arm64.h

Index: test/cctest/test-utils-arm64.h
diff --git a/test/cctest/test-utils-arm64.h b/test/cctest/test-utils-arm64.h
index d00ad5e78cda419be593e4019762b1142daab06e..a091bf39328ee3a99af3e062bea0903bc38082c9 100644
--- a/test/cctest/test-utils-arm64.h
+++ b/test/cctest/test-utils-arm64.h
@@ -96,13 +96,13 @@ class RegisterDump {
     return dump_.sp_;
   }
 
-  inline int64_t wspreg() const {
+  inline int32_t wspreg() const {
     DCHECK(SPRegAliasesMatch());
-    return dump_.wsp_;
+    return static_cast<int32_t>(dump_.wsp_);
   }
 
   // Flags accessors.
-  inline uint64_t flags_nzcv() const {
+  inline uint32_t flags_nzcv() const {
     DCHECK(IsComplete());
     DCHECK((dump_.flags_ & ~Flags_mask) == 0);
     return dump_.flags_ & Flags_mask;