Richi indicated he wants this to be included in gcc-7. So I've updated
the mem* trimming patch with his comments.
The unnecessary SSA updates are gone. Use wide_int_to_tree rather than
building/folding expressions we know will result in constants. Simplify
incrementing the start address b
On 01/04/2017 07:04 AM, Richard Biener wrote:
* tree-ssa-dse.c (need_ssa_update): New file scoped boolean.
(decrement_count): New function.
(increment_start_addr, trim_memstar_call): Likewise.
(trim_partially_dead_store): Call trim_memstar_call.
(pass_ds
On 01/04/2017 07:04 AM, Richard Biener wrote:
Didn't see a re-post of this one so reviewing the old.
Didn't figure mem* trimming was suitable for gcc-7 as I couldn't justify
it as a bugfix, so I didn't ping it.
I don't think it changed materially. All your comments are still
applicable to t
On Fri, Dec 16, 2016 at 2:54 AM, Jeff Law wrote:
> This is the 3rd patch in the kit to improve our DSE implementation.
>
> This patch supports trimming of the head or tail of a memset, memcpy or
> memmove call. It's conceptually similar to trimming CONSTRUCTORS (and was
> in fact developed first)
This is the 3rd patch in the kit to improve our DSE implementation.
This patch supports trimming of the head or tail of a memset, memcpy or
memmove call. It's conceptually similar to trimming CONSTRUCTORS (and
was in fact developed first).
Try as I might, I couldn't find a BZ in our database
