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    SubjectRe: [PATCH] ARM: Do not allow unaligned accesses when CONFIG_ALIGNMENT_TRAP
    Hi Andi,

    On Thu, 2011-05-26 at 22:10 +0100, Andi Kleen wrote:
    > > It is possible that -fconserve-stack is still valuable on ARM given that
    > > it is also used with -mno-unaligned-access for other things than
    > > structure packing on the stack, and therefore its merits can be debated
    > > independently from the alignment issue at hand.
    > The big advantage of -fconserve-stack is that it throttles the inliner
    > if the inlining
    > would cause too much stack growth. This is something you likely want
    > on ARM too, especially as code gets more and more complex.

    Do you have any concrete examples of -fconserve-stack giving an overall
    win that isn't in the noise? The fact that the GCC documentation
    explicitly states that enabling the option can lead to `making the
    program slower' does make me question why we're enabling it in the first

    >From private conversation, the GCC guys don't seem to think this is a
    bug so I'm reluctant to open a bugzilla ticket.


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