hg: jdk9/hs-comp/hotspot: 8055530: assert(_exits.control()->is_top() || !_gvn.type(ret_phi)->empty()) failed: return value must be well defined

[roland.westrelin at oracle.com]

Changeset: 7dfa629d203a
Author:    roland
Date:      2014-12-22 11:21 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/7dfa629d203a

8055530: assert(_exits.control()->is_top() || !_gvn.type(ret_phi)->empty()) failed: return value must be well defined
Summary: concurrent class loading causes return phi to become top
Reviewed-by: kvn

! src/share/vm/opto/c2compiler.cpp
! src/share/vm/opto/c2compiler.hpp
! src/share/vm/opto/compile.cpp
! src/share/vm/opto/parse1.cpp