RFR: 8340125: [lw5] null checks are not being generated for method invocations and array writes [v2]

[Vicente Romero]

> javac is not generating null checks for runtime execution for method invocations and array writes

Vicente Romero has updated the pull request incrementally with one additional commit since the last revision:

  addressing review comments

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/1251/files
  - new: https://git.openjdk.org/valhalla/pull/1251/files/98f741ea..aaf95a05

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1251&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1251&range=00-01

  Stats: 7 lines in 1 file changed: 0 ins; 1 del; 6 mod
  Patch: https://git.openjdk.org/valhalla/pull/1251.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1251/head:pull/1251

PR: https://git.openjdk.org/valhalla/pull/1251