[Bug c/66122] Bad uninlining decisions

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66122

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The last time I looked at the kernel build with -Os, all cases
were simply caused by:

ipa-inline.c:
 820       /* If call is cold, do not inline when function body would grow. */  
 821       else if (!e->maybe_hot_p ()                                          
 822                && (growth >= MAX_INLINE_INSNS_SINGLE                       
 823                    || growth_likely_positive (callee, growth)))            
 824         {                                                                  
 825           e->inline_failed = CIF_UNLIKELY_CALL;                            
 826           want_inline = false;                                             
 827         }                                                                  
 828     }