git: openjdk/jdk: 8283187: C2: loop candidate for superword not always unrolled fully if superword fails

[Roland Westrelin]

Changeset: 14c20bc0
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2022-03-24 12:53:44 +0000
URL:       https://git.openjdk.java.net/jdk/commit/14c20bc0e0ee32b82ffe653ae9e4a0be52d578cb

8283187: C2: loop candidate for superword not always unrolled fully if superword fails

Reviewed-by: thartmann, chagedorn

! src/hotspot/share/opto/loopnode.cpp
! src/hotspot/share/opto/superword.cpp
! src/hotspot/share/opto/superword.hpp
+ test/hotspot/jtreg/compiler/c2/irTests/TestSuperwordFailsUnrolling.java
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java