git: openjdk/jdk: 8291466: C2: assert(false) failed: infinite loop in PhaseIterGVN::transform_old with -XX:+StressIGVN

[Pengfei Li]

Changeset: a88a9e34
Author:    Pengfei Li <pli at openjdk.org>
Date:      2022-08-29 13:06:20 +0000
URL:       https://git.openjdk.org/jdk/commit/a88a9e344f66bca21f3a01dbbcea19b52af14865

8291466: C2: assert(false) failed: infinite loop in PhaseIterGVN::transform_old with -XX:+StressIGVN

Reviewed-by: roland, chagedorn

! src/hotspot/share/opto/mulnode.cpp
! src/hotspot/share/utilities/powerOfTwo.hpp
+ test/hotspot/jtreg/compiler/c2/TestMulNodeInfiniteGVN.java