hg: jdk/jdk: 2 new changesets

[christian.hagedorn at oracle.com]

Changeset: f1ac61e010ef
Author:    chagedorn
Date:      2020-07-22 10:28 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/f1ac61e010ef

8248467: C2: compiler/intrinsics/object/TestClone fails with -XX:+VerifyGraphEdges
Summary: Fix assert by taking MemBarNodes into account whose precedence edge can be NULL.
Reviewed-by: kvn, thartmann

! src/hotspot/share/opto/node.cpp
! test/hotspot/jtreg/compiler/intrinsics/object/TestClone.java

Changeset: fe10ad38509f
Author:    chagedorn
Date:      2020-07-22 10:31 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/fe10ad38509f

8247743: Segmentation fault in debug builds due to stack overflow in find_recur with deep graphs
Summary: Replace the recursive algorithm of Node::find() by an iterative one to avoid a stack overflow crash with deep graphs.
Reviewed-by: kvn, thartmann

! src/hotspot/share/opto/node.cpp
! src/hotspot/share/opto/node.hpp
+ test/hotspot/jtreg/compiler/c2/TestFindNode.java