On Wed, Dec 17, 2014 at 2:10 PM, H.J. Lu <hjl.to...@gmail.com> wrote:
> Add -malign-data={abi|compat,cachineline} to control how GCC aligns
> variables. "compat" uses increased alignment value compatible with
> GCC 4.8 and earlier, "abi" uses alignment value as specified by the
> psABI, and "cacheline" with increased alignment value to match the
> cache line size. "compat" is the default.
>
> gcc/
>
> PR target/61296
> * config/i386/i386-opts.h (ix86_align_data): New enum.
> * config/i386/i386.c (ix86_data_alignment): Return the ABI
> alignment value for -malign-data=abi, the cachine line size
> for -malign-data=cachineline and the older GCC compatible
> alignment value for for -malign-data=compat.
> * config/i386/i386.opt (malign-data=): New.
> * doc/invoke.texi: Document -malign-data=.
Please also mention new user-visible options in GCC changes document.
(Oh, just spotted a trivial typo in the ChangeLog entry: cachineline
-> cacheline).
Uros.
