https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97070
Bug ID: 97070
Summary: Discrepancy in results between OpenMP/OpenACC
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: venetis at ceid dot upatras.gr
Target Milestone: ---
Created attachment 49226
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49226&action=edit
Small example showing the problem
The attached example produces different results when compiled using gcc 10.2.0
and the OpenACC directives and different results using the OpenMP directives.
My understanding is that the two approaches are equivalent and that the OpenMP
version produces the correct results, i.e. all elements of array XMO should be
1, of DCP 2, of IS1 3 and of IS2 24.
Compiled for OpenMP with:
gfortran -O3 -fopenmp -Wall -Wextra test_link.f90 parameters.f90
common_vars.f90 -o test_link
Compiled for OpenACC with:
gfortran -O3 -fopenacc -Wall -Wextra test_link.f90 parameters.f90
common_vars.f90 -o test_link
