[Bug tree-optimization/84362] [7/8/9 Regression] Auto-vectorization regression when accessing member variable through getter/accessor

[ma.noack.pr at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84362

Matthias Noack <ma.noack.pr at gmail dot com> changed:

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                 CC|                            |ma.noack.pr at gmail dot com

--- Comment #2 from Matthias Noack <ma.noack.pr at gmail dot com> ---
As written on SO, replacing

    asm volatile("" : : "g"(&v) : "memory");

By 

    return v.values[capacity - 1];

to avoid the loop being optimised away, leads to the same vectorised code in
7.x as well. So the missed vectorisation, or not inlining size() before
vectorisation causing non-vectorisation due to:

    <source>:24:29: note: not vectorized: complicated access pattern.

might be a side effect of the asm volatile() line.