Mercurial > hg > graal-jvmci-8
changeset 2351:8e72cd29b15d
6589823: Error: meet not symmetric
Summary: arrays pointers meet must fall to bottom if exact array klasses in upper lattice are not equal or super klass is exact.
Reviewed-by: never
author | kvn |
---|---|
date | Sat, 05 Mar 2011 11:02:04 -0800 |
parents | 8ec5e1f45ea1 |
children | 425688247f3d |
files | src/share/vm/opto/type.cpp |
diffstat | 1 files changed, 15 insertions(+), 0 deletions(-) [+] |
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--- a/src/share/vm/opto/type.cpp Fri Mar 04 22:44:50 2011 -0800 +++ b/src/share/vm/opto/type.cpp Sat Mar 05 11:02:04 2011 -0800 @@ -3386,7 +3386,22 @@ instance_id = InstanceBot; tary = TypeAry::make(Type::BOTTOM, tary->_size); } + } else // Non integral arrays. + // Must fall to bottom if exact klasses in upper lattice + // are not equal or super klass is exact. + if ( above_centerline(ptr) && klass() != tap->klass() && + // meet with top[] and bottom[] are processed further down: + tap ->_klass != NULL && this->_klass != NULL && + // both are exact and not equal: + ((tap ->_klass_is_exact && this->_klass_is_exact) || + // 'tap' is exact and super or unrelated: + (tap ->_klass_is_exact && !tap->klass()->is_subtype_of(klass())) || + // 'this' is exact and super or unrelated: + (this->_klass_is_exact && !klass()->is_subtype_of(tap->klass())))) { + tary = TypeAry::make(Type::BOTTOM, tary->_size); + return make( NotNull, NULL, tary, lazy_klass, false, off, InstanceBot ); } + bool xk = false; switch (tap->ptr()) { case AnyNull: