https://gcc.gnu.org/g:855f89f9e3bc9e09fbd6926807ca39eabedc16ed

commit 855f89f9e3bc9e09fbd6926807ca39eabedc16ed
Author: Mikael Morin <mik...@gcc.gnu.org>
Date:   Wed Jul 16 21:39:51 2025 +0200

    Extraction gfc_conv_shift_descriptor
    
    Suppression variable inutilisée

Diff:
---
 gcc/fortran/trans-descriptor.cc | 40 ++++++++++++++++++++++++++++++++++++++++
 gcc/fortran/trans-descriptor.h  |  1 +
 gcc/fortran/trans-expr.cc       | 36 +-----------------------------------
 3 files changed, 42 insertions(+), 35 deletions(-)

diff --git a/gcc/fortran/trans-descriptor.cc b/gcc/fortran/trans-descriptor.cc
index 047846c97ada..607e95ccfd29 100644
--- a/gcc/fortran/trans-descriptor.cc
+++ b/gcc/fortran/trans-descriptor.cc
@@ -1126,3 +1126,43 @@ gfc_conv_remap_descriptor (stmtblock_t *block, tree 
dest, int dest_rank,
                                gfc_array_index_type, stride, tmp);
     }
 }
+
+
+void
+gfc_conv_shift_descriptor (stmtblock_t *block, tree dest, tree src,
+                          int rank, tree zero_cond)
+{
+  tree tmp = gfc_conv_descriptor_data_get (src);
+  gfc_conv_descriptor_data_set (block, dest, tmp);
+
+  tree offset = gfc_index_zero_node;
+  for (int n = 0 ; n < rank; n++)
+    {
+      tree lbound = gfc_conv_descriptor_lbound_get (dest, gfc_rank_cst[n]);
+      lbound = fold_build3_loc (input_location, COND_EXPR,
+                               gfc_array_index_type, zero_cond,
+                               gfc_index_one_node, lbound);
+      lbound = gfc_evaluate_now (lbound, block);
+
+      tmp = gfc_conv_descriptor_ubound_get (src, gfc_rank_cst[n]);
+      tmp = fold_build2_loc (input_location, PLUS_EXPR,
+                            gfc_array_index_type, tmp, lbound);
+      gfc_conv_descriptor_lbound_set (block, dest,
+                                     gfc_rank_cst[n], lbound);
+      gfc_conv_descriptor_ubound_set (block, dest,
+                                     gfc_rank_cst[n], tmp);
+
+      /* Set stride and accumulate the offset.  */
+      tmp = gfc_conv_descriptor_stride_get (src, gfc_rank_cst[n]);
+      gfc_conv_descriptor_stride_set (block, dest,
+                                     gfc_rank_cst[n], tmp);
+      tmp = fold_build2_loc (input_location, MULT_EXPR,
+                            gfc_array_index_type, lbound, tmp);
+      offset = fold_build2_loc (input_location, MINUS_EXPR,
+                               gfc_array_index_type, offset, tmp);
+      offset = gfc_evaluate_now (offset, block);
+    }
+
+  gfc_conv_descriptor_offset_set (block, dest, offset);
+}
+
diff --git a/gcc/fortran/trans-descriptor.h b/gcc/fortran/trans-descriptor.h
index 71012a6320fe..2ee7fdbf4ebd 100644
--- a/gcc/fortran/trans-descriptor.h
+++ b/gcc/fortran/trans-descriptor.h
@@ -104,6 +104,7 @@ void gfc_init_descriptor_variable (stmtblock_t *block, 
gfc_symbol *sym, tree des
 void gfc_conv_shift_descriptor_lbound (stmtblock_t *, tree, int, tree);
 void gfc_conv_shift_descriptor (stmtblock_t *, tree, int);
 void gfc_conv_shift_descriptor (stmtblock_t *, tree, const gfc_array_ref &);
+void gfc_conv_shift_descriptor (stmtblock_t *, tree, tree, int, tree);
 void gfc_conv_remap_descriptor (stmtblock_t *, tree, int, tree, int,
                                gfc_array_ref *);
 
diff --git a/gcc/fortran/trans-expr.cc b/gcc/fortran/trans-expr.cc
index f3b58e7fc33a..52d3ac1bff48 100644
--- a/gcc/fortran/trans-expr.cc
+++ b/gcc/fortran/trans-expr.cc
@@ -11550,7 +11550,6 @@ fcncall_realloc_result (gfc_se *se, int rank, tree 
dtype)
   tree desc;
   tree res_desc;
   tree tmp;
-  tree offset;
   tree zero_cond;
   tree not_same_shape;
   stmtblock_t shape_block;
@@ -11583,9 +11582,6 @@ fcncall_realloc_result (gfc_se *se, int rank, tree 
dtype)
   tmp = gfc_call_free (tmp);
   gfc_add_expr_to_block (&se->post, tmp);
 
-  tmp = gfc_conv_descriptor_data_get (res_desc);
-  gfc_conv_descriptor_data_set (&se->post, desc, tmp);
-
   /* Check that the shapes are the same between lhs and expression.
      The evaluation of the shape is done in 'shape_block' to avoid
      unitialized warnings from the lhs bounds. */
@@ -11629,37 +11625,7 @@ fcncall_realloc_result (gfc_se *se, int rank, tree 
dtype)
   /* Now reset the bounds returned from the function call to bounds based
      on the lhs lbounds, except where the lhs is not allocated or the shapes
      of 'variable and 'expr' are different. Set the offset accordingly.  */
-  offset = gfc_index_zero_node;
-  for (n = 0 ; n < rank; n++)
-    {
-      tree lbound;
-
-      lbound = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[n]);
-      lbound = fold_build3_loc (input_location, COND_EXPR,
-                               gfc_array_index_type, zero_cond,
-                               gfc_index_one_node, lbound);
-      lbound = gfc_evaluate_now (lbound, &se->post);
-
-      tmp = gfc_conv_descriptor_ubound_get (res_desc, gfc_rank_cst[n]);
-      tmp = fold_build2_loc (input_location, PLUS_EXPR,
-                            gfc_array_index_type, tmp, lbound);
-      gfc_conv_descriptor_lbound_set (&se->post, desc,
-                                     gfc_rank_cst[n], lbound);
-      gfc_conv_descriptor_ubound_set (&se->post, desc,
-                                     gfc_rank_cst[n], tmp);
-
-      /* Set stride and accumulate the offset.  */
-      tmp = gfc_conv_descriptor_stride_get (res_desc, gfc_rank_cst[n]);
-      gfc_conv_descriptor_stride_set (&se->post, desc,
-                                     gfc_rank_cst[n], tmp);
-      tmp = fold_build2_loc (input_location, MULT_EXPR,
-                            gfc_array_index_type, lbound, tmp);
-      offset = fold_build2_loc (input_location, MINUS_EXPR,
-                               gfc_array_index_type, offset, tmp);
-      offset = gfc_evaluate_now (offset, &se->post);
-    }
-
-  gfc_conv_descriptor_offset_set (&se->post, desc, offset);
+  gfc_conv_shift_descriptor (&se->post, desc, res_desc, rank, zero_cond);
 }

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