[riscv-port-jdk17u:riscv-port] RFR: 8301313: RISC-V: C2: assert(false) failed: bad AD file due to missing match rule [v2]

[Dingli Zhang]

> Please review this backport to riscv-port-jdk17u.
> Backport of [JDK-8301313](https://bugs.openjdk.org/browse/JDK-8301313). 
> The original patch cannot be directly applied because of the line number, but there are no other additional changes.
> The error `C2: assert(false) failed` mentioned in the original issue may require foreign api to reproduce, which is not available in jdk17u, but the same problem actually exists in jdk17u.
> 
> 
> Testing:
> - Tier1-3 passed without new failure on unmacthed (release).

Dingli Zhang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge branch 'riscv-port' into backport-JDK-8301313
 - Fix format and ins_pipe
 - 8301313: RISC-V: C2: assert(false) failed: bad AD file due to missing match rule
   
   Backport-of: 3ad6aef1496de914b70f00005465e4b22f248d4f

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Changes: https://git.openjdk.org/riscv-port-jdk17u/pull/17/files
 Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk17u&pr=17&range=01
  Stats: 37 lines in 1 file changed: 33 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/riscv-port-jdk17u/pull/17.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk17u.git pull/17/head:pull/17

PR: https://git.openjdk.org/riscv-port-jdk17u/pull/17