RFR: 8255274: [PPC64, s390] wrong StringLatin1.indexOf version matched [v2]

[Martin Doerr]

> PPC64 and s390 currently match indexOfChar_U also for StrIntrinsicNode::L. This leads to incorrect results of StringLatin1.indexOf and alreads breaks builds:
> Optimizing the exploded image
> Error occurred during initialization of boot layer
> 
> We need separate match rules for StrIntrinsicNode::U and StrIntrinsicNode::L.

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  adapt format strings

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/820/files
  - new: https://git.openjdk.java.net/jdk/pull/820/files/b051bd40..186144e5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=820&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=820&range=00-01

  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/820.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/820/head:pull/820

PR: https://git.openjdk.java.net/jdk/pull/820