RFR: 8361037: [ubsan] compiler/c2/irTests/TestFloat16ScalarOperations division by 0

[Jatin Bhateja]

Floating point division by zero is undefined per the C and C++ standards, but is defined by Clang (and by ISO/IEC/IEEE 60559 / IEEE 754) as producing either an infinity or NaN value.

While Java semantics defined in section 15.17.2 "Division Operator" of JLS-24 are well-defined for these constant-folding scenarios

This bug fix patch fixes division by 0 error reported after integration of [JDK-8352635.](https://bugs.openjdk.org/browse/JDK-8352635)
Kindly review and share your feedback.

Best Regards,
Jatin

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Commit messages:
 - 8361037: [ubsan] compiler/c2/irTests/TestFloat16ScalarOperations division by 0

Changes: https://git.openjdk.org/jdk/pull/26062/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26062&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361037
  Stats: 11 lines in 1 file changed: 11 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26062.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26062/head:pull/26062

PR: https://git.openjdk.org/jdk/pull/26062