Fix PR c++/34715: always_inline with templates and not declared as always_inline but definition has it

["Andrew Pinski" <pinskia at gmail dot com>]

Hi,
  The problem here is that after DECL_DISREGARD_INLINE_LIMITS was
added, we don't copy the value from the merged function decl for
template decls.  This fixes that obvious forgotten problem.

This is a regression because we now merge the attributes but the
middle-end decides that it cannot inline a function any more at -O0
even though it should be.

OK? Bootstrapped and tested on i686-apple-darwin8.11.1 without any
regressions.  I added 4 tests to make sure that the we don't regress
again and we actually do the correct thing for always_inline.

Thanks,
Andrew Pinski

* decl.c (duplicate_decls): Merge DECL_DISREGARD_INLINE_LIMITS for
template decls' function decl.

* g++.dg/ext/always_inline-1.C: New test.
* g++.dg/ext/always_inline-2.C: New test.
* g++.dg/ext/always_inline-3.C: New test.
* g++.dg/ext/always_inline-4.C: New test.

Attachment: fixPRinline.diff.txt
Description: Text document