8364025: MinMaxVector clipping range benchmark highestInt/Long can overflow

[galderz]

Fixed benchmark code to avoid overflowing when calculating highestInt and highestLong.

I observed this during early benchmark runs of #30070. I observed some oddities in the results with the clipping range benchmarks, and when I inspected the assembly, the values that were being used to clip didn't make sense. After fixing this the odd results went away.

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Issue

• JDK-8364025: MinMaxVector clipping range benchmark highestInt/Long can overflow (Bug - P4)

Reviewers

• Roland Westrelin (@rwestrel - Reviewer)

Reviewing

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[bridgekeeper]

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[mlbridge]

Webrevs

• 00: Full (14a536d0)

[galderz]

Can someone review this?

[galderz]

/label hotspot-compiler

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[galderz]

Can anyone review this?

[rwestrel]

Looks reasonable to me.

[galderz]

/template append

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