diff options
Diffstat (limited to 'libgfortran')
| -rw-r--r-- | libgfortran/Makefile.am | 1 | ||||
| -rw-r--r-- | libgfortran/Makefile.in | 8 | ||||
| -rw-r--r-- | libgfortran/gfortran.map | 1 | ||||
| -rw-r--r-- | libgfortran/libgfortran.h | 8 | ||||
| -rw-r--r-- | libgfortran/runtime/deep_copy.c | 125 |
5 files changed, 140 insertions, 3 deletions
diff --git a/libgfortran/Makefile.am b/libgfortran/Makefile.am index 4f3b303..46e7df5 100644 --- a/libgfortran/Makefile.am +++ b/libgfortran/Makefile.am @@ -218,6 +218,7 @@ endif gfor_src= \ runtime/bounds.c \ runtime/compile_options.c \ +runtime/deep_copy.c \ runtime/memory.c \ runtime/string.c \ runtime/select.c diff --git a/libgfortran/Makefile.in b/libgfortran/Makefile.in index ce828b2..116e80f 100644 --- a/libgfortran/Makefile.in +++ b/libgfortran/Makefile.in @@ -231,7 +231,7 @@ libgfortran_la_LIBADD = @LIBGFOR_MINIMAL_FALSE@ runtime/fpu.lo runtime/main.lo \ @LIBGFOR_MINIMAL_FALSE@ runtime/pause.lo runtime/stop.lo am__objects_3 = runtime/bounds.lo runtime/compile_options.lo \ - runtime/memory.lo runtime/string.lo runtime/select.lo \ + runtime/deep_copy.lo runtime/memory.lo runtime/string.lo runtime/select.lo \ $(am__objects_1) $(am__objects_2) am__objects_4 = generated/matmul_i1.lo generated/matmul_i2.lo \ generated/matmul_i4.lo generated/matmul_i8.lo \ @@ -1013,8 +1013,8 @@ gfor_helper_src = intrinsics/associated.c intrinsics/abort.c \ @IEEE_SUPPORT_TRUE@ieee/ieee_exceptions.F90 \ @IEEE_SUPPORT_TRUE@ieee/ieee_features.F90 -gfor_src = runtime/bounds.c runtime/compile_options.c runtime/memory.c \ - runtime/string.c runtime/select.c $(am__append_6) \ +gfor_src = runtime/bounds.c runtime/compile_options.c runtime/deep_copy.c \ + runtime/memory.c runtime/string.c runtime/select.c $(am__append_6) \ $(am__append_7) i_matmul_c = \ generated/matmul_i1.c \ @@ -1981,6 +1981,8 @@ runtime/bounds.lo: runtime/$(am__dirstamp) \ runtime/$(DEPDIR)/$(am__dirstamp) runtime/compile_options.lo: runtime/$(am__dirstamp) \ runtime/$(DEPDIR)/$(am__dirstamp) +runtime/deep_copy.lo: runtime/$(am__dirstamp) \ + runtime/$(DEPDIR)/$(am__dirstamp) runtime/memory.lo: runtime/$(am__dirstamp) \ runtime/$(DEPDIR)/$(am__dirstamp) runtime/string.lo: runtime/$(am__dirstamp) \ diff --git a/libgfortran/gfortran.map b/libgfortran/gfortran.map index 98808dc..fc01665 100644 --- a/libgfortran/gfortran.map +++ b/libgfortran/gfortran.map @@ -2037,4 +2037,5 @@ GFORTRAN_16 { global: _gfortran_string_split; _gfortran_string_split_char4; + _gfortran_cfi_deep_copy_array; } GFORTRAN_15.2; diff --git a/libgfortran/libgfortran.h b/libgfortran/libgfortran.h index 25c3cb6..71ec640 100644 --- a/libgfortran/libgfortran.h +++ b/libgfortran/libgfortran.h @@ -914,6 +914,14 @@ internal_proto(xcalloc); extern void *xrealloc (void *, size_t); internal_proto(xrealloc); +/* deep_copy.c - Runtime helper for recursive allocatable array components */ + +struct CFI_cdesc_t; +extern void cfi_deep_copy_array (gfc_array_void *, + gfc_array_void *, + void (*copy_element) (void *, void *)); +export_proto(cfi_deep_copy_array); + /* environ.c */ extern void init_variables (void); diff --git a/libgfortran/runtime/deep_copy.c b/libgfortran/runtime/deep_copy.c new file mode 100644 index 0000000..6567400 --- /dev/null +++ b/libgfortran/runtime/deep_copy.c @@ -0,0 +1,125 @@ +/* Deep copy support for allocatable components in derived types. + Copyright (C) 2025 Free Software Foundation, Inc. + +This file is part of the GNU Fortran runtime library (libgfortran). + +Libgfortran is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public +License as published by the Free Software Foundation; either +version 3 of the License, or (at your option) any later version. + +Libgfortran is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#include "libgfortran.h" +#include <string.h> + +/* Runtime helper for deep copying allocatable array components when the + element type contains nested allocatable components. The front end handles + allocation and deallocation; this helper performs element-wise copies using + the compiler-generated element copier so that recursion takes place at + runtime. */ + +static inline size_t +descriptor_elem_size (gfc_array_void *desc) +{ + size_t size = GFC_DESCRIPTOR_SIZE (desc); + return size == 0 ? 1 : size; +} + +void +cfi_deep_copy_array (gfc_array_void *dest, gfc_array_void *src, + void (*copy_element) (void *, void *)) +{ + int rank; + size_t src_elem_size; + size_t dest_elem_size; + index_type extent[GFC_MAX_DIMENSIONS]; + index_type src_stride_bytes[GFC_MAX_DIMENSIONS]; + index_type dest_stride_bytes[GFC_MAX_DIMENSIONS]; + index_type count[GFC_MAX_DIMENSIONS]; + char *src_ptr; + char *dest_ptr; + + if (src == NULL || dest == NULL) + return; + + if (GFC_DESCRIPTOR_DATA (src) == NULL) + { + if (GFC_DESCRIPTOR_DATA (dest) != NULL) + internal_error (NULL, "cfi_deep_copy_array: destination must be " + "deallocated when source is not allocated"); + return; + } + + if (GFC_DESCRIPTOR_DATA (dest) == NULL) + internal_error (NULL, "cfi_deep_copy_array: destination not allocated"); + + rank = GFC_DESCRIPTOR_RANK (src); + src_elem_size = descriptor_elem_size (src); + dest_elem_size = descriptor_elem_size (dest); + + if (rank <= 0) + { + memcpy (GFC_DESCRIPTOR_DATA (dest), GFC_DESCRIPTOR_DATA (src), + src_elem_size); + if (copy_element != NULL) + copy_element (GFC_DESCRIPTOR_DATA (dest), + GFC_DESCRIPTOR_DATA (src)); + return; + } + + for (int dim = 0; dim < rank; dim++) + { + extent[dim] = GFC_DESCRIPTOR_EXTENT (src, dim); + if (extent[dim] <= 0) + return; + + src_stride_bytes[dim] + = GFC_DESCRIPTOR_STRIDE (src, dim) * src_elem_size; + dest_stride_bytes[dim] + = GFC_DESCRIPTOR_STRIDE (dest, dim) * dest_elem_size; + count[dim] = 0; + } + + src_ptr = (char *) GFC_DESCRIPTOR_DATA (src); + dest_ptr = (char *) GFC_DESCRIPTOR_DATA (dest); + + while (true) + { + memcpy (dest_ptr, src_ptr, src_elem_size); + if (copy_element != NULL) + copy_element (dest_ptr, src_ptr); + + dest_ptr += dest_stride_bytes[0]; + src_ptr += src_stride_bytes[0]; + count[0]++; + + int dim = 0; + while (count[dim] == extent[dim]) + { + count[dim] = 0; + dest_ptr -= dest_stride_bytes[dim] * extent[dim]; + src_ptr -= src_stride_bytes[dim] * extent[dim]; + dim++; + if (dim == rank) + return; + count[dim]++; + dest_ptr += dest_stride_bytes[dim]; + src_ptr += src_stride_bytes[dim]; + } + } +} + +export_proto(cfi_deep_copy_array); |