RFR: 8327381: Refactor type-improving transformations in BoolNode::Ideal to BoolNode::Value [v12]

[Kangcheng Xu]

> This PR resolves [JDK-8327381](https://bugs.openjdk.org/browse/JDK-8327381)
> 
> Currently the transformations for expressions with patterns `((x & m) u<= m)` or `((m & x) u<= m)` to `true` is in `BoolNode::Ideal` function with a new constant node of value `1` created. However, this is technically a type-improving (reduction in range) transformation that's better suited in `BoolNode::Value` function.
> 
> New unit test `test/hotspot/jtreg/compiler/c2/TestBoolNodeGvn.java` asserting on IR nodes and correctness of this transformation is added and passing.

Kangcheng Xu has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 22 additional commits since the last revision:

 - spread boolean AND and OR into subcases, update number of expected CMP_U nodes
 - Merge branch 'master' into boolnode-refactor
 - Merge branch 'master' into boolnode-refactor
 - update test values, @run directive, and remove an empty line
 - Merge branch 'master' into boolnode-refactor
 - move test location, add negative test case, simplify imports
 - Merge branch 'master' into boolnode-refactor
 - refactor BoolNode::Value() and extract code to ::Value_cmpu_and_mask
 - update comments
 - fix indentation again
 - ... and 12 more: https://git.openjdk.org/jdk/compare/306f45b7...b731f6d7

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18198/files
  - new: https://git.openjdk.org/jdk/pull/18198/files/715a6304..b731f6d7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18198&range=11
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18198&range=10-11

  Stats: 20878 lines in 333 files changed: 14159 ins; 4894 del; 1825 mod
  Patch: https://git.openjdk.org/jdk/pull/18198.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18198/head:pull/18198

PR: https://git.openjdk.org/jdk/pull/18198