RFR: 8309502: RISC-V: String.indexOf intrinsic may produce misaligned memory loads

[Vladimir Kempik]

On Tue, 6 Jun 2023 11:41:51 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

> Looks good, I see some `load_4chr` at [1], could it also produce misaligned loads?
> 
> 1. https://github.com/openjdk/jdk/blob/01455a07a7e1f15aed43cd47222047810c826abd/src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.cpp#L675-L690

That's hard to say, I just run some tests with perf and check result for trp_lam events. Such analysis is a lot easier.

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PR Comment: https://git.openjdk.org/jdk/pull/14320#issuecomment-1579021949