[Bug rtl-optimization/88311] [9 Regression] mlongcall indirections are optimised away (for binutils versions that don't support AS_PLTSEQ)

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88311

--- Comment #9 from Alan Modra <amodra at gmail dot com> ---
Created attachment 45235
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45235&action=edit
fix

r266604, git 0a4b5c66df9, "[RS6000] Use standard call patterns for
__tls_get_addr calls" is the patch that regressed the long calls.  The uploaded
patch has been regression tested powerpc64le-linux with HAVE_AS_PLTCALL set. 
I'm waiting on the results of a powerpc64-linux biarch bootstrap with
HAVE_AS_PLTCALL undefined.