Fastdebug jvm crashes with
#
# Internal Error (/BUILD_AREA/jdk7/hotspot/src/share/vm/opto/cfgnode.cpp:807), pid=XXX, tid=XXX
# Error: assert((_type == Type::MEMORY) == (_adr_type != __null),"adr_type for memory phis only")

when running with TieredCompilation (-server -Xmixed -XX:+TieredCompilation).
The problem doesn't reproduce with the current tiered implementation