RFR: 8277864: Compilation error thrown while doing a boxing conversion on selector expression

[Jan Lahoda]

Consider a switch whose selector type is a primitive type (e.g. an integer). This may still be a pattern matching switch, if it has a case with a pattern label. But, as the selector type is primitive, TransPatterns must not attempt to generate a null check, so this patch avoids it.

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Commit messages:
 - 8277864: Compilation error thrown while doing a boxing conversion on selector expression

Changes: https://git.openjdk.java.net/jdk/pull/6695/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6695&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277864
  Stats: 15 lines in 2 files changed: 12 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6695.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6695/head:pull/6695

PR: https://git.openjdk.java.net/jdk/pull/6695