RFR: Merge lworld

[Vicente Romero]

Merge

-------------

Commit messages:
 - Merge lworld
 - 8271234: [lworld] InlineTypeBaseNode::merge_with fails with assert(i < _cnt)
 - 8264340: [lworld] [AArch64] TestLWorld.java assertion failure in OopFlow::build_oop_map
 - 8271405: [lworld] Redo test/jdk/java/lang/invoke/VarHandles changes for JDK-8269956
 - 8271536: [lworld] VerifyError in hotspot/jtreg/runtime/classFileParserBug/NameAndTypeSig.java
 - 8271508: [lworld] disallow primitive classes with super_class of 0
 - 8271544: [lworld] GraphBuilder::withfield should handle identity class holder
 - Merge jdk
 - 8270086: ARM32-softfp: Do not load CONSTANT_double using the condy helper methods in the interpreter
 - 8270901: Typo PHASE_CPP in CompilerPhaseType
 - ... and 594 more: https://git.openjdk.java.net/valhalla/compare/9458f792...79489ac8

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.java.net/valhalla/pull/520/files
  Stats: 99726 lines in 1953 files changed: 49414 ins; 36739 del; 13573 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/520.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/520/head:pull/520

PR: https://git.openjdk.java.net/valhalla/pull/520