[Bug ipa/65006] [5 Regression] 252.eon in SPEC CPU 2000 miscompiled

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65006

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jan Hubicka from comment #1)
> Hmm, I wonder why this reproduce on x86-32 only. Does it use any special
> local calling conventions that x86-64 doesn't?

For local functions, GCC will use regparm to pass parameters in registers,
instead of on stack.