I saw some compiler warnings when I tried to build OpenJDK with GCC 12.0.1 on 
Fedora 36.
As you can see, the warnings spreads several areas. Let me know if I should 
separate them by area.

* -Wstringop-overflow
    * src/hotspot/share/oops/array.hpp
    * 
src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp

In member function 'void Array<T>::at_put(int, const T&) [with T = unsigned 
char]',
    inlined from 'void ConstantPool::tag_at_put(int, jbyte)' at 
/home/ysuenaga/github-forked/jdk/src/hotspot/share/oops/constantPool.hpp:126:64,
    inlined from 'void ConstantPool::method_at_put(int, int, int)' at 
/home/ysuenaga/github-forked/jdk/src/hotspot/share/oops/constantPool.hpp:380:15,
    inlined from 'ConstantPool* 
BytecodeConstantPool::create_constant_pool(JavaThread*) const' at 
/home/ysuenaga/github-forked/jdk/src/hotspot/share/classfile/bytecodeAssembler.cpp:85:26:

-------------

Commit messages:
 - 8286562: GCC 12 reports some compiler warnings

Changes: https://git.openjdk.java.net/jdk/pull/8646/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8646&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286562
  Stats: 63 lines in 13 files changed: 51 ins; 1 del; 11 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8646.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8646/head:pull/8646

PR: https://git.openjdk.java.net/jdk/pull/8646

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