https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100363
Linus Torvalds <torva...@linux-foundation.org> changed:
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--- Comment #4 from Linus Torvalds <torva...@linux-foundation.org> ---
(In reply to Andrew Pinski from comment #1)
> The loop gets vectorized, I don't see the problem really.
See
https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/issues/372
and in particular the comment
"In the first 8-byte copy, src and dst overlap"
so apparently gcc has decided that they can't overlap, despite the two pointers
being literally generated from the same base pointer.
But I don't real arc assembly, so I'll have to take Vineet's word for it.
Vineet, have you been able to generate a smaller test-case?
