Re: (GCC) 13.0.1: internal compiler error

[Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>]

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  
> >  
>