RFR(S): 8155612: Aarch64: vector nodes need to support misaligned offset

Roland Westrelin rwestrel at redhat.com
Thu Apr 28 09:50:06 UTC 2016


When the superword optimization encounters a misaligned offset, it tries
to align the loop induction variable so the memory access is aligned. So
even though the aarch64 port only supports align vector memory accesses
( Matcher::misaligned_vectors_ok() return false), vector node can still
get a misaligned offset which results in:

# Internal Error
pid=3780, tid=3807
# guarantee(chk == -1 || chk == 0) failed: Field too big for insn


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