On Tue, Nov 19, 2013 at 1:59 AM, Alan Modra wrote:
> This patch disables the default -mstrict-align on power8. Rather than
> testing values from enum processor_type, which is prone to error when
> adding a new processor, I chose one of the mask bits that happens to
> be set for power8, and is li
> It's not desirable since gcc easily loses track of alignment, for instance
> with -mstrict-align
>
> void foo (char *p, char *q)
> {
> __builtin_memcpy (p, q, 4);
> }
>
> generates
>
> lbz 7,0(4)
> lbz 8,1(4)
> lbz 10,2(4)
> lbz 9,3(4)
> stb 7,0(3)
> stb 8
On Mon, Jun 10, 2013 at 03:14:04PM -0400, Michael Meissner wrote:
> On Fri, Jun 07, 2013 at 10:54:39AM +0930, Alan Modra wrote:
> > I'd like to remove -mstrict-align for little-endian powerpc, because
> > the assumption that mis-aligned accesses are massively slow isn't true
> > for current powerpc
