[riscv-port] RFR: 8276989: riscv: C1 should not allocate x3, which is the gp register

Mon Nov 15 03:06:53 UTC 2021

On Sun, 14 Nov 2021 14:06:11 GMT, Fei Yang <fyang at openjdk.org> wrote:

> Changes looks good to me. Thanks for fixing this. Did you performed any tests for this?

Yes - hotspot/jdk full tiers' results look good. This patch is directly cherry-picked from [that patch](https://github.com/riscv-collab/riscv-openjdk/pull/2). Would you like to have another simple review? Thanks.

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PR: https://git.openjdk.java.net/riscv-port/pull/3