[Bug bootstrap/65150] [5 Regression] r220875 causes bootstrap failure on x86_64 darwin

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65150

--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #8)
> On I also see
> 
> FAIL: c-c++-common/attr-used.c  -std=gnu++(11|14|98)  scan-assembler
> function_declaration_before
> 
> or
> 
> FAIL: c-c++-common/attr-used.c  -Wc++-compat   scan-assembler
> function_declaration_before

Hello.

I've just analyzed both these test cases (iinline-5.c and attr-used) and both
situations looks correctly from my point of view:

If target does not support alias support in iinline-5.c, ICF optimization
creates a thunk that inliner refuses to inline.

Similar situation for attr-used.c, where as we call condition redirect_callers
and alias has no reference (_ZL27function_declaration_beforev), thus the symbol
is removed.

I've been running complete c/c++ testsuite on x86_64-linux-pc (with disable
alias support) and if it passes (modulo these testcases), I would like to apply
Jakub's patch.

Thanks,
Martin