Re: Fix for PRs 36043, 58744 and 65408

["H.J. Lu" <hjl.tools@gmail.com>]

On Sat, Mar 14, 2015 at 6:02 AM, Alan Modra <amodra@gmail.com> wrote:
> This is Richi's prototype patch in
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36043#c23 with fixes for
> blocks larger than one reg, big-endian, and BLOCK_REG_PADDING.
> I also removed the operand_subword_force since we may as well let
> narrow_bit_field_mem in extract_bit_field do that for us.  It is
> necessary to do the BLOCK_REG_PADDING shift after we've loaded the
> block or else repeat the bit-field extraction in that case.
>
> Bootstrapped and regression tested (-m32 and -m64) x86_64-linux and
> powerpc64-linux.  OK to apply?
>
> I'll also throw together a testcase or three.  For execute tests I'm
> thinking of using sbrk to locate an odd sized struct such that access
> past the end segfaults, rather than mmap/munmap as was done in the
> pr36043 testcase.  Does that sound reasonable?
>
>         PR target/65408
>         PR target/58744
>         PR middle-end/36043
>         * calls.c (load_register_parameters): Don't load past end of
>         mem unless suitably aligned.
>

Can you add a testcase in

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36043


-- 
H.J.