[Bug rtl-optimization/110206] [14 Regression] wrong code with -Os -march=cascadelake since r14-1246

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110206

--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
The testcase needs __attribute__((noinline)) to supress unwanted constant
propagation with recent gcc.

void
__attribute__((noinline))
foo (U u, u16 c, V *r)
...