[Bug bootstrap/61320] [4.10 regression] ICE in jcf-parse.c:1622 (parse_class_file

[thomas.preudhomme at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61320

--- Comment #17 from Thomas Preud'homme <thomas.preudhomme at arm dot com> ---
(In reply to Richard Biener from comment #12)
> 
> I'd say
> 
> Index: tree-ssa-math-opts.c
> ===================================================================
> --- tree-ssa-math-opts.c        (revision 211170)
> +++ tree-ssa-math-opts.c        (working copy)
> @@ -2149,7 +2149,8 @@ bswap_replace (gimple stmt, gimple_stmt_
>        unsigned align;
>  
>        align = get_object_alignment (src);
> -      if (bswap && SLOW_UNALIGNED_ACCESS (TYPE_MODE (load_type), align))
> +      if (align < GET_MODE_ALIGNMENT (TYPE_MODE (load_type))
> +         && SLOW_UNALIGNED_ACCESS (TYPE_MODE (load_type), align))
>         return false;
>  
>        /*  Compute address to load from and cast according to the size
> 
> is obvious (and pre-approved).

Alright but tests need to be modified to add an xfail for target impacted by
this. I did such a change and also rewrote the tests to use aligned variable as
much as possible so that they are more meaningful on STRICT_ALIGNMENT targets.
I'll post it for review today (at least for the changes in the testsuite).