Merge

7179138: Incorrect result with String concatenation optimization Summary: check for and skip diamond shaped NULL check code for the result of toString() Reviewed-by: twisti, roland

7178280: Failed new vector regression tests Summary: When looking for the same value in an other register check that all parts of that register has the same value. Reviewed-by: johnc, twisti

7129715: MAC: SIGBUS in nsk stress test Summary: StackOverflowError may get lost on OSX. Reviewed-by: kvn, dcubed

7177923: SIGBUS on sparc in compiled code for java.util.Calendar.clear() Summary: disable vectorization of a memory access with more elements per vector than one which is used for alignment on sparc Reviewed-by: twisti

7157365: jruby/bench.bench_timeout crashes with JVM internal error Reviewed-by: jrose, kvn

7176856: add the JRE name to the error log Reviewed-by: coleenp, jrose, kvn, twisti Contributed-by: Krystal Mok <sajia@taobao.com>

7174363: Arrays.copyOfRange leads to VM crash with -Xcomp -server if executed by testing framework Summary: Arrays.copyOfRange(original, from, to) with from > original.length tries to do a copy with a negative length. Reviewed-by: kvn, twisti

7119644: Increase superword's vector size up to 256 bits Summary: Increase vector size up to 256-bits for YMM AVX registers on x86. Reviewed-by: never, twisti, roland

Merge