RFR: 8325159: C2 SuperWord: measure time for CITime

[Roberto Castañeda Lozano]

On Fri, 2 Feb 2024 10:05:39 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> I want to add SuperWord / AutoVectorization time to `CITime`.
> 
> This is for @vnkozlov who requested I measure the time difference for https://github.com/openjdk/jdk/pull/17624
> 
> Example:
> 
> ...
>     C2 Compile Time:        2.757 s
>        Parse:                 0.027 s
>        Optimize:              2.505 s
>          Escape Analysis:       0.000 s
>            Conn Graph:            0.000 s
>            Macro Eliminate:       0.000 s
>          GVN 1:                 0.007 s
>          Incremental Inline:    0.000 s
>            IdealLoop:             0.000 s
>           (IGVN:                  0.000 s)
>           (Inline:                0.000 s)
>           (Prune Useless:         0.000 s)
>            Other:                 0.000 s
>          Vector:                0.000 s
>            Box elimination:     0.000 s
>              IGVN:              0.000 s
>              Prune Useless:     0.000 s
>          Renumber Live:         0.000 s
>          IdealLoop:             2.345 s
>            AutoVectorize:       1.507 s       <------------ added this
>          IdealLoop Verify:      0.000 s
>          Cond Const Prop:       0.014 s
>          GVN 2:                 0.008 s
>          Macro Expand:          0.023 s
>          Barrier Expand:        0.000 s
>          Graph Reshape:         0.004 s
>          Other:                 0.103 s
> ...

Looks good, thanks! Just a question: shouldn't we also include the time taken by the call from `IdealLoopTree::policy_unroll_slp_analysis()`?

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PR Review: https://git.openjdk.org/jdk/pull/17683#pullrequestreview-1859259246