[Bug tree-optimization/78821] GCC7: Copying whole 32 bits structure field by field not optimised into copying whole 32 bits at once

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78821

--- Comment #30 from Uroš Bizjak <ubizjak at gmail dot com> ---
Another unhandled case:

--cut here--
typedef __SIZE_TYPE__ size_t;

void baz (char *buf, size_t base, unsigned int data)
{
  buf[base] = data;
  buf[base+1] = data >> 8;
}
--cut here--

compiles to:

        movb    %dl, (%rdi,%rsi)
        movb    %dh, 1(%rdi,%rsi)
        ret