git: openjdk/jdk: 8256535: C2: randomize CCP processing order for stress testing

[Vladimir Kozlov]

Changeset: bc565414
Author:    Roberto Castañeda Lozano <rcastanedalo at openjdk.org>
Committer: Vladimir Kozlov <kvn at openjdk.org>
Date:      2021-01-07 20:43:48 +0000
URL:       https://git.openjdk.java.net/jdk/commit/bc565414

8256535: C2: randomize CCP processing order for stress testing

Add 'StressCCP' option to randomize the selection of the node to be examined in
each CCP iteration.

Reviewed-by: chagedorn, kvn, thartmann

! src/hotspot/share/opto/c2_globals.hpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/phaseX.cpp
- test/hotspot/jtreg/compiler/arguments/TestStressIGVNOptions.java
+ test/hotspot/jtreg/compiler/arguments/TestStressOptions.java
! test/hotspot/jtreg/compiler/debug/TestGenerateStressSeed.java
- test/hotspot/jtreg/compiler/debug/TestStressIGVN.java
+ test/hotspot/jtreg/compiler/debug/TestStressIGVNAndCCP.java