RFR: 8311583: tableswitch broken by JDK-8310577 [v3]

[Coleen Phillimore]

> I demoted some types for -Wconversion warnings but they're supposed to be larger types to catch overflow for tableswitch and lookupswitch.  Restored old code (except int64_t not jlong).
> Tested with tier1-4.

Coleen Phillimore has updated the pull request incrementally with two additional commits since the last revision:

 - Improve tableswitch test comment.
 - Improve tableswitch test comment.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14788/files
  - new: https://git.openjdk.org/jdk/pull/14788/files/63c28c0a..d4259ab0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14788&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14788&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14788.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14788/head:pull/14788

PR: https://git.openjdk.org/jdk/pull/14788