RFR: 8315066: Add unsigned bounds and known bits to TypeInt/Long

[Quan Anh Mai]

Hi,

This patch adds unsigned bounds and known bits constraints to TypeInt and TypeLong. This opens more transformation opportunities in an elegant manner as well as helps avoid some ad-hoc rules in Hotspot.

In general, a TypeInt/Long represents a set of values x that satisfies: x s>= lo && x s<= hi && x u>= ulo && x u<= uhi && (x & zeros) == 0 && (~x & ones) == 0. These constraints are not independent, e.g. an int that lies in [0, 3] in signed domain must also lie in [0, 3] in unsigned domain and have all bits but the last 2 being unset. As a result, we must normalize the constraints (tighten the constraints so that they are optimal) before constructing a TypeInt/Long instance.

This is extracted from #15440 , node value transformations are left for later PRs. I have also added unit tests to verify the soundness of constraint normalization.

Please kindly review, thanks a lot.

Testing

- [ ] GHA
- [ ] Linux x64, tier 1-4

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Commit messages:
 - add unit tests
 - fix template parameter
 - refactor
 - implement unsigned bounds and known bits

Changes: https://git.openjdk.org/jdk/pull/17508/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17508&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315066
  Stats: 1442 lines in 16 files changed: 887 ins; 282 del; 273 mod
  Patch: https://git.openjdk.org/jdk/pull/17508.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17508/head:pull/17508

PR: https://git.openjdk.org/jdk/pull/17508