RFR: 8353551: C2: Constant folding for ReverseBytes nodes [v2]

[Vladimir Ivanov]

On Tue, 8 Apr 2025 08:13:00 GMT, Hannes Greule <hgreule at openjdk.org> wrote:

>> test/hotspot/jtreg/compiler/c2/irTests/ReverseBytesConstantsTests.java line 72:
>> 
>>> 70:     @DontCompile
>>> 71:     public void assertResultI() {
>>> 72:         Asserts.assertEQ(Integer.reverseBytes(0x04030201), testI1());
>> 
>> Please, add more test cases (specifically, with negative constants).
>
> I added cases with a leading 0x80 byte now

Thanks!

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PR Review Comment: https://git.openjdk.org/jdk/pull/24382#discussion_r2033930819