[riscv-port-jdk17u:riscv-port] RFR: 8294430: RISC-V: Small refactoring for movptr_with_offset

[Feilong Jiang]

On Thu, 6 Apr 2023 02:08:28 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Please review this backport to riscv-port-jdk17u.
> Backport of [JDK-8294430](https://bugs.openjdk.org/browse/JDK-8294430).
> The original patch cannot be directly applied because jdk17u has no `emit_entry_barrier_stub`, which introduced with [JDK-8293007](https://bugs.openjdk.org/browse/JDK-8293007), and there are no other additional changes.
> 
> Testing:
> - Tier1-3 passed without new failure on unmacthed (release).

Marked as reviewed by fjiang (no project role).

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PR Review: https://git.openjdk.org/riscv-port-jdk17u/pull/36#pullrequestreview-1374642333