> Bootstrapped/regtested x86_64-linux and also lto-bootstraped. Looks OK?
> 
> 	* alias.c (alias_set_subset_of, alias_sets_conflict_p,
> 	objects_must_conflict_p): Short circuit for !flag_strict_aliasing
> 	(get_alias_set): Remove flag_strict_aliasing check.
> 	(new_alias_set): Likewise.

Not clear whether it's this patch specifically or another one in the series, 
but the compiler now hangs on simple Ada code it used to compile instantly.

A couple of testcases is attached.  It looks like the compiler is now stuck in 
get_alias_set endlessly pushing references onto a vector.

-- 
Eric Botcazou