https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82403
Bug ID: 82403
Summary: [openacc, nvptx] Optimize binary shuffle tree
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
In nvptx_goacc_reduction_fini we find the following todo:
...
if (level == GOMP_DIM_VECTOR)
{
/* Emit binary shuffle tree. TODO. Emit this as an actual loop,
but that requires a method of emitting a unified jump at the
gimple level. */
...
A fix for this was committed to the gomp4 branch in august 2016 (submitted
here: https://gcc.gnu.org/ml/gcc-patches/2016-08/msg02147.html ), but it's not
yet present on trunk.
