[jdk21u-dev] RFR: 8337780: RISC-V: C2: Change C calling convention for sp to NS

[Goetz Lindenmaier]

On Sun, 25 Aug 2024 02:25:31 GMT, Fei Yang <fyang at openjdk.org> wrote:

> Clean backport of JDK-8337780 to reduce frame size by 16 bytes and improve performance for some C2 runtime stubs as we do not have to save sp on the method entry. Gtest & Tier1-3 tested on linux-riscv64 platform.

Please backport to 23 first.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/945#issuecomment-2317595827