RFR: 8343964: RISC-V: Improve PrintOptoAssembly output for loadNKlassCompactHeaders node

[Feilong Jiang]

On Tue, 12 Nov 2024 02:55:48 GMT, Fei Yang <fyang at openjdk.org> wrote:

> Hi, please review this small change.
> 
> Currently, we print a simple `lwu` for this node, which is not accurate becasue we do a `ld` and logic shift right the loaded 64-bit value for this node. This simply changed it into `load_narrow_klass_compact` like other CPU platforms. After this change, we have:
> 
> 
> 070     B2: #   out( B8 B3 ) <- in( B1 )  Freq: 0.9
> 070 +   load_narrow_klass_compact R28, [R12, #4]        # compressed class ptr, #@loadNKlassCompactHeaders
> 
> 
> (Tagging: @Hamlin-Li)

LGTM, thanks!

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Marked as reviewed by fjiang (Committer).

PR Review: https://git.openjdk.org/jdk/pull/22025#pullrequestreview-2431651715