RFR 8199383 introduced a number of disturbing warnings for ARM32 build:

In file included from /home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/librefignore.c:33:0:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c: In function ‘setTag’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:135:15: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   class_tag = (MyTag*)haba;
               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:147:38: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   err = (*jvmti)->SetTag(jvmti, obj, (jlong)new_tag);
                                      ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c: In function ‘heapMarkCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:296:42: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   const MyTag* const tag = newTag(rmark, (const MyTag*)class_tag, size, NULL);
                                          ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:297:14: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   *tag_ptr = (jlong)tag;
              ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c: In function ‘heapRootCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:315:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = newTag(kind, (MyTag*)class_tag, size, NULL);
                               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:317:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     *tag_ptr = (jlong)tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:320:57: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     addRef(fakeRoot, HEAP_ROOT_REF_KIND_BASE+root_kind, (MyTag*)*tag_ptr);
                                                         ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c: In function ‘stackReferenceCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:341:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = newTag(kind, (MyTag*)class_tag, size, NULL);
                               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:343:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     *tag_ptr = (jlong)tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:346:57: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     addRef(fakeRoot, HEAP_ROOT_REF_KIND_BASE+root_kind, (MyTag*)*tag_ptr);
                                                         ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c: In function ‘objectReferenceCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:367:16: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     referrer = (MyTag *)referrer_tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:372:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = newTag(kind, (MyTag*)class_tag, size, NULL);
                               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:374:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     *tag_ptr = (jlong) tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/refignore/refignore.c:377:18: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = (MyTag*)*tag_ptr;
                  ^
In file included from /home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/libheapref.c:33:0:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c: In function ‘setTag’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:135:15: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   class_tag = (MyTag*)haba;
               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:147:38: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   err = (*jvmti)->SetTag(jvmti, obj, (jlong)new_tag);
                                      ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c: In function ‘heapMarkCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:298:42: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   const MyTag* const tag = newTag(rmark, (const MyTag*)class_tag, size, NULL);
                                          ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:299:14: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   *tag_ptr = (jlong)tag;
              ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c: In function ‘heapRootCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:317:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = newTag(kind, (MyTag*)class_tag, size, NULL);
                               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:319:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     *tag_ptr = (jlong)tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:322:57: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     addRef(fakeRoot, HEAP_ROOT_REF_KIND_BASE+root_kind, (MyTag*)*tag_ptr);
                                                         ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c: In function ‘stackReferenceCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:343:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = newTag(kind, (MyTag*)class_tag, size, NULL);
                               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:345:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     *tag_ptr = (jlong)tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:348:57: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     addRef(fakeRoot, HEAP_ROOT_REF_KIND_BASE+root_kind, (MyTag*)*tag_ptr);
                                                         ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c: In function ‘objectReferenceCallback’:
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:369:16: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     referrer = (MyTag *)referrer_tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:374:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = newTag(kind, (MyTag*)class_tag, size, NULL);
                               ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:376:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     *tag_ptr = (jlong) tag;
                ^
/home/build/jdk-jdk/test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/heapref/heapref.c:379:18: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     MyTag* tag = (MyTag*)*tag_ptr;
                  ^