On 05/21/2015 07:40 AM, Segher Boessenkool wrote:
On Wed, May 20, 2015 at 11:38:44PM -0600, Jeff Law wrote:
I've also verified this is one of the changes ultimately necessary to
resolve the code generation regressions caused by Venkat's combine.c
change on the PA across my 300+ testfiles for a P
On Wed, May 20, 2015 at 11:38:44PM -0600, Jeff Law wrote:
> I've also verified this is one of the changes ultimately necessary to
> resolve the code generation regressions caused by Venkat's combine.c
> change on the PA across my 300+ testfiles for a PA cross compiler.
How much does it help, do
On Thu, May 21, 2015 at 7:38 AM, Jeff Law wrote:
>
> find_split_point will tend to favor splitting complex insns in such a way as
> to encourage multiply-add insns. It does this by splitting an
> unrecognizable insn at the (plus (mult)).
>
> Now that many MULTs are canonicalized as ASHIFT, that c
find_split_point will tend to favor splitting complex insns in such a
way as to encourage multiply-add insns. It does this by splitting an
unrecognizable insn at the (plus (mult)).
Now that many MULTs are canonicalized as ASHIFT, that code to prefer the
multiply-add is no longer triggering
