On 11/27/2015 07:09 AM, Dominik Vogt wrote:
New patch with the following changes:
* Fixed comment about dynamic var area placement.
* The area is now placed further away from the stack pointer than
the non-dynamic stack variables (tested only with
STACK_GROWS_DOWNWARD). This is a possible performance
improvement on S/390 (hoping that more variables will be
addressable using a displacement).
* Moved the code that calculates the size to actually allocate
from the size required by dynamic stack variables to a separate
function. Use that function from allocate_dynamic_stack_space()
and expand_stack_vars() so the size calculations are the same
for both.
* Use a target hook to activate the feature (for now).
(This is just meant to make it more feasible to be included in
Gcc6. If it's to late for this the code may be as well be used
for all targets.)
My inclination is for this to wait until gcc7.
jeff
