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[tree-ssa] fix java Array_3 and friends


Richard Henderson writes:
 > Latent bug exposed by Jason's recent front-end work.  We were only
 > looking through a single level of references, so
 > 
 > 	arr-><D1234>.length
 > 
 > was not seen to be a memory reference that might trap.  My libjava
 > results are now
 > 
 > FAIL: PR4766 -O3 compilation from source
 > FAIL: linking cxxtest
 > FAIL: String_overflow -O3 compilation from source
 > FAIL: err3 output - source compiled test
 > FAIL: err3 -O3 output - source compiled test

Thanks for that.  I've got a patch for String_overflow testing now.  I
know what the problem with err3 is, and Jeff provided a patch for
PR4766.  cxxtest is a testsuite bug, I think.

Andrew.


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