RFR: 8319690: [AArch64] C2 compilation hits offset_ok_for_immed: assert "c2 compiler bug" [v3]

[Fei Gao]

On Fri, 31 May 2024 15:25:16 GMT, Andrew Haley <aph at openjdk.org> wrote:

> > But `1030` can't be encoded as `base` + `offset` mode
> 
> Why not?

See https://developer.arm.com/documentation/ddi0602/2023-09/Base-Instructions/LDR--immediate---Load-Register--immediate--?lang=en. For `long` type, signed immediate byte offset should be in range `-256` to `255` and positive immediate byte offset: a multiple of `8` in the range `0` to `32760`.

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PR Comment: https://git.openjdk.org/jdk/pull/16991#issuecomment-2149217082