https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91514
Bug ID: 91514
Summary: optimization needs ficktive memory allocation
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: akonn7 at mail dot ru
Target Milestone: ---
Created attachment 46738
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46738&action=edit
Example project for optimized gemm, with optimization bug
In attachment(file gemm.h) exist optimization bug: we need to allocate fictive
memory block for kc, without it we won't get vectorization in inner most loop,
but kc is still dynamically traverse across big memory block for subdivided
matrix C, so i'm suppose optimizer is too paranoid for possible data
dependencies.
