Hi,
I've juste created a bug report with a small fortran code to reproduce
the internal error in gfortran.
Building a new compiler version from devel/omp/gcc-12 branch is in progress.
Patrick
Le 24/04/2023 à 20:29, Bernhard Reutner-Fischer a écrit :
Cc:ing Thomas, who knows openacc better.
There is a devel/omp/gcc-12 branch you might want to try. I don't know
how different that branch is wrt openacc.
HTH,
On Mon, 24 Apr 2023 19:39:15
+0200 Patrick Begou via Fortran <fortran@gcc.gnu.org> wrote:
Hi Harald
as I said, it is a large, massively parallel fortran code: more than 700
files, some with several thousands of lines. It could be difficult to
create a small reproducer but I will try if the problem is not known as
an other git branch of this code also create an internal error on
another file.
Best regards
Patrick
Le 24/04/2023 à 19:27, Harald Anlauf a écrit :
Hi Patrick,
I did not see any similar report in bugzilla, so could you please
open a PR and attach a self-contained reproducer? Ideally the
reproducer would be reduced to simplify the analysis for those
familiar with the status of the OpenACC implementation.
Thanks,
Harald
Am 21.04.23 um 17:13 schrieb Patrick Begou:
Hi,
I have built this morning the latest gfortran from a git clone:
GNU Fortran (GCC) 13.0.1 20230421 (prerelease)
I'm trying this compiler on a large and complexe Fortran90 code with
offloading using OpenACC.
At this time:
- code compiles with nvfortran and runs on A100 GPU.
- code compiles with Cray Fortran (with some difficulties) but do not
run on MI250 GPU (we are tacking the problem, a segfault if openacc is
set on)
- code compile with GNU GCC 13 without -fopenacc option and runs on cpu
(Epyc2 7302)
- a basic test-code using OpenACC compiles and run on the GPU.
- compiling my large code with gcc 13.0.1 using -fopenacc for A100 GPU
produce an internal error in the compiler :
transforms_defs_m.f90:354:53:
354 | !$acc enter data attach(atransform2%next)
| ^
internal compiler error: in omp_group_base, at gimplify.cc:9412
0xa830c6 omp_group_base
../../gcc/gcc/gimplify.cc:9412
0xa830c6 omp_index_mapping_groups_1
../../gcc/gcc/gimplify.cc:9441
0xa833c7 omp_index_mapping_groups
../../gcc/gcc/gimplify.cc:9502
0xa96a9a gimplify_scan_omp_clauses
../../gcc/gcc/gimplify.cc:10802
0xa8660d gimplify_omp_target_update
../../gcc/gcc/gimplify.cc:15563
0xa8660d gimplify_expr(tree_node**, gimple**, gimple**, bool
(*)(tree_node*), int)
../../gcc/gcc/gimplify.cc:16928
0xa89826 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7219
0xa875a3 gimplify_statement_list
../../gcc/gcc/gimplify.cc:2019
0xa875a3 gimplify_expr(tree_node**, gimple**, gimple**, bool
(*)(tree_node*), int)
../../gcc/gcc/gimplify.cc:16821
0xa89826 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7219
0xa86e8a gimplify_and_add(tree_node*, gimple**)
../../gcc/gcc/gimplify.cc:492
0xa86e8a gimplify_loop_expr
../../gcc/gcc/gimplify.cc:1993
0xa86e8a gimplify_expr(tree_node**, gimple**, gimple**, bool
(*)(tree_node*), int)
../../gcc/gcc/gimplify.cc:16581
0xa89826 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7219
0xa875a3 gimplify_statement_list
../../gcc/gcc/gimplify.cc:2019
0xa875a3 gimplify_expr(tree_node**, gimple**, gimple**, bool
(*)(tree_node*), int)
../../gcc/gcc/gimplify.cc:16821
0xa89826 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7219
0xa89d2b gimplify_bind_expr
../../gcc/gcc/gimplify.cc:1430
0xa86d8e gimplify_expr(tree_node**, gimple**, gimple**, bool
(*)(tree_node*), int)
../../gcc/gcc/gimplify.cc:16577
0xa89826 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7219
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Options used (I've just added -fopenacc for moving from cpu version to
OpenACC):
-fopenacc -freport-bug -g -fpic -x f95-cpp-input -std=gnu -ffree-form
-fall-intrinsics -fallow-argument-mismatch -Wall -Wextra -W
-Wno-unused-function -Wno-compare-reals -fno-omit-frame-pointer -O3
-ftree-vectorize -ffast-math -funroll-loops -pipe
No additionnal files a produced with -freport-bug.
In attachment the script used to build the compiler.
Let me know how I can help with informations to improve Gnu fortran
compilers.
Patrick
