inline failing

FYI

Brian Fraser pointed out to me that according to the gcc docs, an 
inlined function's definition must come before it is called.  It turns 
out that -Winlining is supposed to tell you of all the failures.

I tried this and got many messages.  The most common was like this
perl.c: In function ‘Perl_call_sv’:
inline.h:66: warning: inlining failed in call to ‘S_SvREFCNT_dec’: call 
is unlikely and code size would grow
perl.c:2725: warning: called from here

There were 244 of these.  All the messages were of this type.  Things 
that I thought would raise a message (because of ordering) didn't.

• inline failing by Karl Williamson
• Re: inline failing by Dave Mitchell
• Re: inline failing by Karl Williamson