https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70533
Bug ID: 70533
Summary: reductions on reference-typed variables are broken in
OpenACC
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: middle-end
Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-linux-gnu
Created attachment 38181
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38181&action=edit
reference reduction test case
I see this error when I try to build the attached test case in trunk:
reference-reduction.f90:5:0:
!$acc parallel reduction(+:v1) copy(v1)
internal compiler error: in lower_oacc_reductions, at omp-low.c:5589
0xd54cba lower_oacc_reductions
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:5589
0xd85065 lower_omp_target
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:16735
0xd86196 lower_omp_1
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17050
0xd86692 lower_omp
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17143
0xd85db4 lower_omp_1
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:16991
0xd86692 lower_omp
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17143
0xd88482 execute_lower_omp
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17878
0xd88526 execute
/home/cesar/openacc/trunk/gcc-mainline/gcc/omp-low.c:17915
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
I posted a patch to fix this issue several months ago, but that patch was never
reviewed <https://gcc.gnu.org/ml/gcc-patches/2016-02/msg01476.html>. I'll
rebase that patch and post it again.
