git: openjdk/jdk17u-dev: 8308103: Massive (up to ~30x) increase in C2 compilation time since JDK 17

[Goetz Lindenmaier]

Changeset: dbbded30
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2023-10-06 07:16:15 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/dbbded3027ee36921acb1c29f44b7a9f899f2fc8

8308103: Massive (up to ~30x) increase in C2 compilation time since JDK 17

Backport-of: c6ab9c2905203e1ec897b3404f9179ff975d0054

! src/hotspot/share/opto/loopopts.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestSinkingNodesCausesLongCompilation.java