[jdk17u-dev] RFR: 8278384: Bytecodes::result_type() for arraylength returns T_VOID instead of T_INT

[Zhengyu Gu]

A clean backport for parity with Oracle 17.0.3.

This bug could potentially cause unexpected and intermittent failures that would be difficult to find.

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Commit messages:
 - Backport 769f14db847813f5a3601e9ec21e6cadbd99ee96

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/16/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=16&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278384
  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/16.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/16/head:pull/16

PR: https://git.openjdk.java.net/jdk17u-dev/pull/16