[Bug rtl-optimization/66626] [4.9/5/6 Regression] gcc.dg/torture/stackalign/non-local-goto-5.c segfaults w/ -mregparm=3

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66626

--- Comment #17 from H.J. Lu <hjl.tools at gmail dot com> ---
non local goto, nested function and regparm == 3 are incompatible.  Is
that possible to detect non local goto is used inside ix86_function_regparm?