git: openjdk/jdk: 8296412: Special case infinite loops with unmerged backedges in IdealLoopTree::check_safepts

[Emanuel Peter]

Changeset: da38d43f
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2022-12-19 12:21:50 +0000
URL:       https://git.openjdk.org/jdk/commit/da38d43fcc640ea9852db6c7c23817dcef7080d5

8296412: Special case infinite loops with unmerged backedges in IdealLoopTree::check_safepts

Reviewed-by: chagedorn, kvn, thartmann

! src/hotspot/share/opto/loopnode.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestInfiniteLoopWithUnmergedBackedges.jasm
+ test/hotspot/jtreg/compiler/loopopts/TestInfiniteLoopWithUnmergedBackedgesMain.java