Integrated: 8353842: C2: Add graph dumps before and after loop opts phase

[Manuel Hässig]

On Tue, 8 Apr 2025 13:28:59 GMT, Manuel Hässig <duke at openjdk.org> wrote:

> This PR adds graph dumps before and after loop optimizations, but only if the compiled method actually contains loops. This helps to distinguish loop optimizations in IGV and to match loop related nodes like opaque template assertion predicates.
> 
> I tested this by compiling a few test methods and looking at the ideal graph. Also, I ran tier1 through tier3 and Oracle internal testing.

This pull request has now been integrated.

Changeset: 4f80437e
Author:    Manuel Hässig <manuel.hassig at oracle.com>
Committer: Christian Hagedorn <chagedorn at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/4f80437ee05e4a3f755a166140669c0fd631f56d
Stats:     13 lines in 3 files changed: 11 ins; 0 del; 2 mod

8353842: C2: Add graph dumps before and after loop opts phase

Reviewed-by: chagedorn, epeter

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PR: https://git.openjdk.org/jdk/pull/24509