Hi, This patch arose from discussion of the manual deep copy patch here:
https://gcc.gnu.org/ml/gcc-patches/2019-12/msg01439.html In C/C++, it's not permitted to mix full struct-type accesses and "attach/detach" accesses to the same struct's members within a single directive. This patch adds the same restriction to the Fortran front-end, and adjusts some existing tests to match. A test is also added for detection of duplicate derived-type member accesses within a directive. Tested with offloading to NVPTX. OK for mainline? Thanks, Julian ChangeLog 2020-01-04 Julian Brown <jul...@codesourcery.com> gcc/fortran/ * gfortran.h (gfc_symbol): Add comp_mark bitfield. * openmp.c (resolve_omp_clauses): Disallow mixed component and full-derived-type accesses to the same variable within a single directive. libgomp/ * testsuite/libgomp.oacc-fortran/deep-copy-2.f90: Remove test from here. * testsuite/libgomp.oacc-fortran/deep-copy-3.f90: Don't use mixed component/non-component variable refs in a single directive. * testsuite/libgomp.oacc-fortran/classtypes-1.f95: Likewise. gcc/testsuite/ * gfortran.dg/goacc/deep-copy-2.f90: Add test here. Make a compilation test, and expect rejection of mixed component/non-component accesses. * gfortran.dg/goacc/mapping-tests-1.f90: New test. --- gcc/fortran/gfortran.h | 6 ++-- gcc/fortran/openmp.c | 31 ++++++++++--------- .../gfortran.dg/goacc}/deep-copy-2.f90 | 8 +++-- .../gfortran.dg/goacc/mapping-tests-1.f90 | 15 +++++++++ .../libgomp.oacc-fortran/classtypes-1.f95 | 6 ++-- .../libgomp.oacc-fortran/deep-copy-3.f90 | 4 ++- 6 files changed, 49 insertions(+), 21 deletions(-) rename {libgomp/testsuite/libgomp.oacc-fortran => gcc/testsuite/gfortran.dg/goacc}/deep-copy-2.f90 (63%) create mode 100644 gcc/testsuite/gfortran.dg/goacc/mapping-tests-1.f90 diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h index df07eeed8e3..1de5f0d171e 100644 --- a/gcc/fortran/gfortran.h +++ b/gcc/fortran/gfortran.h @@ -1592,9 +1592,11 @@ typedef struct gfc_symbol current statement have the mark member nonzero. Of these symbols, symbols with old_symbol equal to NULL are symbols created within the current statement. Otherwise, old_symbol points to a copy of - the old symbol. gfc_new is used in symbol.c to flag new symbols. */ + the old symbol. gfc_new is used in symbol.c to flag new symbols. + comp_mark is used to indicate variables which have component accesses + in OpenACC directive clauses. */ struct gfc_symbol *old_symbol; - unsigned mark:1, gfc_new:1; + unsigned mark:1, comp_mark:1, gfc_new:1; /* The tlink field is used in the front end to carry the module declaration of separate module procedures so that the characteristics diff --git a/gcc/fortran/openmp.c b/gcc/fortran/openmp.c index c105657a91b..78351b190f7 100644 --- a/gcc/fortran/openmp.c +++ b/gcc/fortran/openmp.c @@ -4245,6 +4245,7 @@ resolve_omp_clauses (gfc_code *code, gfc_omp_clauses *omp_clauses, for (n = omp_clauses->lists[list]; n; n = n->next) { n->sym->mark = 0; + n->sym->comp_mark = 0; if (n->sym->attr.flavor == FL_VARIABLE || n->sym->attr.proc_pointer || (!code && (!n->sym->attr.dummy || n->sym->ns != ns))) @@ -4310,23 +4311,25 @@ resolve_omp_clauses (gfc_code *code, gfc_omp_clauses *omp_clauses, && (list != OMP_LIST_REDUCTION || !openacc)) for (n = omp_clauses->lists[list]; n; n = n->next) { - bool array_only_p = true; - /* Disallow duplicate bare variable references and multiple - subarrays of the same array here, but allow multiple components of - the same (e.g. derived-type) variable. For the latter, duplicate - components are detected elsewhere. */ + bool component_ref_p = false; + + /* Allow multiple components of the same (e.g. derived-type) + variable here. Duplicate components are detected elsewhere. */ if (openacc && n->expr && n->expr->expr_type == EXPR_VARIABLE) for (gfc_ref *ref = n->expr->ref; ref; ref = ref->next) - if (ref->type != REF_ARRAY) - { - array_only_p = false; - break; - } - if (array_only_p) + if (ref->type == REF_COMPONENT) + component_ref_p = true; + if (openacc && ((!component_ref_p && n->sym->comp_mark) + || (component_ref_p && n->sym->mark))) + gfc_error ("Symbol %qs has mixed component and non-component " + "accesses at %L", n->sym->name, &n->where); + else if (n->sym->mark) + gfc_error ("Symbol %qs present on multiple clauses at %L", + n->sym->name, &n->where); + else { - if (n->sym->mark) - gfc_error ("Symbol %qs present on multiple clauses at %L", - n->sym->name, &n->where); + if (component_ref_p) + n->sym->comp_mark = 1; else n->sym->mark = 1; } diff --git a/libgomp/testsuite/libgomp.oacc-fortran/deep-copy-2.f90 b/gcc/testsuite/gfortran.dg/goacc/deep-copy-2.f90 similarity index 63% rename from libgomp/testsuite/libgomp.oacc-fortran/deep-copy-2.f90 rename to gcc/testsuite/gfortran.dg/goacc/deep-copy-2.f90 index 35936617b87..1e556b16b47 100644 --- a/libgomp/testsuite/libgomp.oacc-fortran/deep-copy-2.f90 +++ b/gcc/testsuite/gfortran.dg/goacc/deep-copy-2.f90 @@ -1,4 +1,4 @@ -! { dg-do run } +! { dg-do compile } ! Test of attach/detach with "acc data", two clauses at once. @@ -14,7 +14,9 @@ program dtype allocate(var%a(1:n)) -!$acc data copy(var) copy(var%a) +!$acc data copy(var) copy(var%a) ! { dg-error "Symbol .var. has mixed component and non-component accesses" } + +!$acc data copy(var%a) copy(var) ! { dg-error "Symbol .var. has mixed component and non-component accesses" } !$acc parallel loop do i = 1,n @@ -22,6 +24,8 @@ program dtype end do !$acc end parallel loop +!$acc end data + !$acc end data do i = 1,n diff --git a/gcc/testsuite/gfortran.dg/goacc/mapping-tests-1.f90 b/gcc/testsuite/gfortran.dg/goacc/mapping-tests-1.f90 new file mode 100644 index 00000000000..c1bfe586842 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/goacc/mapping-tests-1.f90 @@ -0,0 +1,15 @@ +! { dg-do compile } + +subroutine foo + type t + integer :: i, j + end type t + + type(t) x + + ! We should reject the duplicate reference here. +!$acc enter data copyin(x%i, x%i) +! { dg-error ".x.i. appears more than once in map clauses" "" { target "*-*-*" } 11 } + + +end diff --git a/libgomp/testsuite/libgomp.oacc-fortran/classtypes-1.f95 b/libgomp/testsuite/libgomp.oacc-fortran/classtypes-1.f95 index f16f42fc3af..c5f0ffffb02 100644 --- a/libgomp/testsuite/libgomp.oacc-fortran/classtypes-1.f95 +++ b/libgomp/testsuite/libgomp.oacc-fortran/classtypes-1.f95 @@ -31,7 +31,8 @@ program main myvar%p%p(i) = -1.0 end do -!$acc enter data copyin(myvar, myvar%p) create(myvar%p%p) +!$acc enter data copyin(myvar) +!$acc enter data copyin(myvar%p) create(myvar%p%p) !$acc parallel loop present(myvar%p%p) do i=1,100 @@ -39,7 +40,8 @@ program main end do !$acc end parallel loop -!$acc exit data copyout(myvar%p%p) delete(myvar, myvar%p) +!$acc exit data copyout(myvar%p%p) delete(myvar%p) +!$acc exit data delete(myvar) do i=1,100 if (myvar%p%p(i) .ne. i * 2) stop 1 diff --git a/libgomp/testsuite/libgomp.oacc-fortran/deep-copy-3.f90 b/libgomp/testsuite/libgomp.oacc-fortran/deep-copy-3.f90 index 667d944fecb..edb6b8d61a4 100644 --- a/libgomp/testsuite/libgomp.oacc-fortran/deep-copy-3.f90 +++ b/libgomp/testsuite/libgomp.oacc-fortran/deep-copy-3.f90 @@ -16,12 +16,14 @@ program dtype allocate(var%a(1:n)) allocate(var%b(1:n)) -!$acc parallel loop copy(var) copy(var%a(1:n)) copy(var%b(1:n)) +!$acc data copy(var) +!$acc parallel loop copy(var%a(1:n)) copy(var%b(1:n)) do i = 1,n var%a(i) = i var%b(i) = i end do !$acc end parallel loop +!$acc end data do i = 1,n if (i .ne. var%a(i)) stop 1 -- 2.23.0
