https://gcc.gnu.org/g:ffdfc5b045d7364f76d1f41022b2286108898699

commit r15-4495-gffdfc5b045d7364f76d1f41022b2286108898699
Author: Tobias Burnus <tbur...@baylibre.com>
Date:   Sat Oct 19 10:18:30 2024 +0200

    Fortran: Add range-based diagnostic
    
    GCC's diagnostic engine gained a while ago support for ranges, i.e. instead
    of pointing at a single character '^', it can also have a '~~~~^~~~~~' 
range.
    
    This patch adds support for this and adds 9 users for it, which covers the
    most common cases. A single '^' can be still useful. Some location data in
    gfortran is rather bad - often the matching pattern includes whitespace such
    that the before or after location points to the beginning/end of the
    whitespace, which can be far of especially when comments and/or continuation
    lines are involed. Otherwise, often a '^' still sufficient, albeit wrong
    location data only becomes obvious once starting to use ranges.
    
    The 'locus' is extended to support two ways to store the data; hereby
    gfc_current_locus always contains the old format (at least during parsing)
    and gfc_current_locus shall not be used in trans*.cc. The latter permits
    a nice cleanup to just use input_location. Otherwise, the new format is
    only used when switching to ranges.
    The only reason to convert from location_t to locus occurs in trans*.cc
    for the gfc_error (etc.) diagnostic and for gfc_trans_runtime_check; there
    are 5 currently 5 such cases.  For gfc_* diagnostic, we could think of
    another letter besides %L or a modifier like '%lL', if deemed useful.
    
    In any case, the new format is just:
      locus->u.location = linemap_position_for_loc_and_offset (line_table,
                             loc->u.lb->location, loc->nextc - loc->u.lb->line);
      locus->nextc = (gfc_char_t *) -1;  /* Marker for new format. */
    i.e. using the existing location_t location in in the linebuffer (which
    points to column 0) and add as offset the actually used column number.
    
    As location_t handles ranges, we just use it also to store them via:
      location = make_location (caret, begin, end)
    There are a few convenience macros/functions but that's all.
    
    Alongside, a few minor fixes were done: linemap_location_before_p replaces
    a line-number based comparison, which does not handle multiple statements
    in the same line that ';' allows for.
    
    gcc/fortran/ChangeLog:
    
            * data.cc (gfc_assign_data_value): Use linemap_location_before_p
            and GFC_LOCUS_IS_SET.
            * decl.cc (gfc_verify_c_interop_param): Make better translatable.
            (build_sym, variable_decl, gfc_match_formal_arglist,
            gfc_match_subroutine): Add range-based locations, use it in
            diagnostic and gobble whitespace for better locations.
            * error.cc (gfc_get_location_with_offset): Handle new format.
            (gfc_get_location_range): New.
            * expr.cc (gfc_check_assign): Use GFC_LOCUS_IS_SET.
            * frontend-passes.cc (check_locus_code, check_locus_expr):
            Likewise.
            (runtime_error_ne): Use GFC_LOCUS_IS_SET.
            * gfortran.h (locus): Change lb to union with lb and location.
            (GFC_LOCUS_IS_SET): Define.
            (gfc_get_location_range): New prototype.
            (gfc_new_symbol, gfc_get_symbol, gfc_get_sym_tree,
            gfc_get_ha_symbol, gfc_get_ha_sym_tree): Take optional locus
            argument.
            * io.cc (io_constraint): Use GFC_LOCUS_IS_SET.
            * match.cc (gfc_match_sym_tree): Use range locus.
            * openmp.cc (gfc_match_omp_variable_list,
            gfc_match_omp_doacross_sink): Likewise.
            * parse.cc (next_free): Update for locus struct change.
            * primary.cc (gfc_match_varspec): Likewise.
            (match_variable): Use range locus.
            * resolve.cc (find_array_spec): Use GFC_LOCUS_IS_SET.
            * scanner.cc (gfc_at_eof, gfc_at_bol, gfc_start_source_files,
            gfc_advance_line, gfc_define_undef_line, skip_fixed_comments,
            gfc_gobble_whitespace, include_stmt, gfc_new_file): Update
            for locus struct change.
            * symbol.cc (gfc_new_symbol, gfc_get_sym_tree, gfc_get_symbol,
            gfc_get_ha_sym_tree, gfc_get_ha_symbol): Take optional locus.
            * trans-array.cc (gfc_trans_array_constructor_value): Use %L not %C.
            (gfc_trans_g77_array, gfc_trans_dummy_array_bias,
            gfc_trans_class_array, gfc_trans_deferred_array): Replace
            gfc_{save,set,restore}_backend_locus by directly using
            input_location.
            * trans-common.cc (build_equiv_decl, get_init_field): Likewise.
            * trans-decl.cc (gfc_get_extern_function_decl, build_function_decl,
            build_entry_thunks, gfc_null_and_pass_deferred_len,
            gfc_trans_deferred_vars, gfc_trans_use_stmts, finish_oacc_declare,
            gfc_generate_block_data): Likewise.
            * trans-expr.cc (gfc_copy_class_to_class, gfc_conv_expr): Changes
            to avoid gfc_current_locus.
            * trans-io.cc (set_error_locus): Likewise.
            * trans-openmp.cc (gfc_trans_omp_workshare): Use input_locus 
directly.
            * trans-stmt.cc (gfc_trans_if_1): Likewise and use GFC_LOCUS_IS_SET.
            * trans-types.cc (gfc_get_union_type, gfc_get_derived_type): 
Likewise.
            * trans.cc (gfc_locus_from_location): New.
            (trans_runtime_error_vararg, gfc_trans_runtime_check): Use 
location_t
            for file + line data.
            (gfc_current_backend_file, gfc_save_backend_locus,
            gfc_set_backend_locus, gfc_restore_backend_locus): Remove.
            (trans_code): Use input_location directly, don't set 
gfc_current_locus.
            * trans.h (gfc_save_backend_locus, gfc_set_backend_locus,
            gfc_restore_backend_locus): Remove prototypes.
            (gfc_locus_from_location): Add prototype.
    
    gcc/testsuite/ChangeLog:
    
            * gfortran.dg/bounds_check_25.f90: Update expected column
            in the diagnostic.
            * gfortran.dg/goacc/pr92793-1.f90: Likewise.
            * gfortran.dg/gomp/allocate-14.f90: Likewise.
            * gfortran.dg/gomp/polymorphic-mapping.f90: Likewise.
            * gfortran.dg/gomp/reduction5.f90: Likewise.
            * gfortran.dg/gomp/reduction6.f90: Likewise.

Diff:
---
 gcc/fortran/data.cc                                |  18 ++--
 gcc/fortran/decl.cc                                |  40 ++++----
 gcc/fortran/error.cc                               |  36 +++++++-
 gcc/fortran/expr.cc                                |   3 +-
 gcc/fortran/frontend-passes.cc                     |  19 +++-
 gcc/fortran/gfortran.h                             |  23 +++--
 gcc/fortran/io.cc                                  |   6 +-
 gcc/fortran/match.cc                               |  13 ++-
 gcc/fortran/openmp.cc                              |  28 ++++--
 gcc/fortran/parse.cc                               |   2 +-
 gcc/fortran/primary.cc                             |   4 +-
 gcc/fortran/resolve.cc                             |   3 +-
 gcc/fortran/scanner.cc                             |  94 +++++++++----------
 gcc/fortran/symbol.cc                              |  21 +++--
 gcc/fortran/trans-array.cc                         |  55 ++++++-----
 gcc/fortran/trans-common.cc                        |   5 +-
 gcc/fortran/trans-decl.cc                          | 102 ++++++++++-----------
 gcc/fortran/trans-expr.cc                          |   9 +-
 gcc/fortran/trans-io.cc                            |  10 +-
 gcc/fortran/trans-openmp.cc                        |   2 +-
 gcc/fortran/trans-stmt.cc                          |  17 ++--
 gcc/fortran/trans-types.cc                         |  12 +--
 gcc/fortran/trans.cc                               |  70 ++++----------
 gcc/fortran/trans.h                                |   5 +-
 gcc/testsuite/gfortran.dg/bounds_check_25.f90      |   8 +-
 gcc/testsuite/gfortran.dg/goacc/pr92793-1.f90      |   8 +-
 gcc/testsuite/gfortran.dg/gomp/allocate-14.f90     |   4 +-
 .../gfortran.dg/gomp/polymorphic-mapping.f90       |  22 ++---
 gcc/testsuite/gfortran.dg/gomp/reduction5.f90      |   6 +-
 gcc/testsuite/gfortran.dg/gomp/reduction6.f90      |   4 +-
 30 files changed, 343 insertions(+), 306 deletions(-)

diff --git a/gcc/fortran/data.cc b/gcc/fortran/data.cc
index d80ba66d358d..c0974be88b22 100644
--- a/gcc/fortran/data.cc
+++ b/gcc/fortran/data.cc
@@ -384,9 +384,10 @@ gfc_assign_data_value (gfc_expr *lvalue, gfc_expr *rvalue, 
mpz_t index,
                     declarations.  Therefore, check which is the most
                     recent.  */
                  gfc_expr *exprd;
-                 exprd = (LOCATION_LINE (con->expr->where.lb->location)
-                          > LOCATION_LINE (rvalue->where.lb->location))
-                         ? con->expr : rvalue;
+                 exprd = (linemap_location_before_p (line_table,
+                                        gfc_get_location (&con->expr->where),
+                                        gfc_get_location (&rvalue->where))
+                          ? rvalue : con->expr);
                  if (gfc_notify_std (GFC_STD_GNU,
                                      "re-initialization of %qs at %L",
                                      symbol->name, &exprd->where) == false)
@@ -605,14 +606,17 @@ gfc_assign_data_value (gfc_expr *lvalue, gfc_expr 
*rvalue, mpz_t index,
 
   /* Overwriting an existing initializer is non-standard but usually only
      provokes a warning from other compilers.  */
-  if (init != NULL && init->where.lb && rvalue->where.lb)
+  if (init != NULL
+      && GFC_LOCUS_IS_SET (init->where)
+      && GFC_LOCUS_IS_SET (rvalue->where))
     {
       /* Order in which the expressions arrive here depends on whether
         they are from data statements or F95 style declarations.
         Therefore, check which is the most recent.  */
-      expr = (LOCATION_LINE (init->where.lb->location)
-             > LOCATION_LINE (rvalue->where.lb->location))
-          ? init : rvalue;
+      expr = (linemap_location_before_p (line_table,
+                                        gfc_get_location (&init->where),
+                                        gfc_get_location (&rvalue->where))
+             ? rvalue : init);
       if (gfc_notify_std (GFC_STD_GNU, "re-initialization of %qs at %L",
                          symbol->name, &expr->where) == false)
        return false;
diff --git a/gcc/fortran/decl.cc b/gcc/fortran/decl.cc
index 81e5e6269f6e..151578954dc3 100644
--- a/gcc/fortran/decl.cc
+++ b/gcc/fortran/decl.cc
@@ -1573,11 +1573,11 @@ gfc_verify_c_interop_param (gfc_symbol *sym)
              && sym->ts.type == BT_DERIVED
              && gfc_has_default_initializer (sym->ts.u.derived))
            {
-             gfc_error ("Default-initialized %s dummy argument %qs "
-                        "at %L is not permitted in BIND(C) procedure %qs",
-                        (sym->attr.pointer ? "pointer" : "allocatable"),
-                        sym->name, &sym->declared_at,
-                        sym->ns->proc_name->name);
+             gfc_error ("Default-initialized dummy argument %qs with %s "
+                        "attribute at %L is not permitted in BIND(C) "
+                        "procedure %qs", sym->name,
+                        (sym->attr.pointer ? "POINTER" : "ALLOCATABLE"),
+                        &sym->declared_at, sym->ns->proc_name->name);
              retval = false;
            }
 
@@ -1733,15 +1733,14 @@ build_sym (const char *name, int elem, gfc_charlen *cl, 
bool cl_deferred,
     {
       gfc_symtree *s = gfc_get_unique_symtree (gfc_current_ns);
       s->n.sym = st->n.sym;
-      sym = gfc_new_symbol (name, gfc_current_ns);
-
+      sym = gfc_new_symbol (name, gfc_current_ns, var_locus);
 
       st->n.sym = sym;
       sym->refs++;
       gfc_set_sym_referenced (sym);
     }
   /* ...Otherwise generate a new symtree and new symbol.  */
-  else if (gfc_get_symbol (name, NULL, &sym))
+  else if (gfc_get_symbol (name, NULL, &sym, var_locus))
     return false;
 
   /* Check if the name has already been defined as a type.  The
@@ -2633,6 +2632,7 @@ variable_decl (int elem)
      name to be '%FILL' which gives it an anonymous (inaccessible) name.  */
   m = MATCH_NO;
   gfc_gobble_whitespace ();
+  var_locus = gfc_current_locus;
   c = gfc_peek_ascii_char ();
   if (c == '%')
     {
@@ -2674,8 +2674,6 @@ variable_decl (int elem)
        goto cleanup;
     }
 
-  var_locus = gfc_current_locus;
-
   /* Now we could see the optional array spec. or character length.  */
   m = gfc_match_array_spec (&as, true, true);
   if (m == MATCH_ERROR)
@@ -2690,6 +2688,8 @@ variable_decl (int elem)
       goto cleanup;
     }
 
+   var_locus = gfc_get_location_range (NULL, 0, &var_locus, 1,
+                                      &gfc_current_locus);
   if (flag_cray_pointer)
     cp_as = gfc_copy_array_spec (as);
 
@@ -2881,9 +2881,9 @@ variable_decl (int elem)
       if (sym != NULL && (sym->attr.dummy || sym->attr.result))
        {
          m = MATCH_ERROR;
-         gfc_error ("%qs at %C is a redefinition of the declaration "
+         gfc_error ("%qs at %L is a redefinition of the declaration "
                     "in the corresponding interface for MODULE "
-                    "PROCEDURE %qs", sym->name,
+                    "PROCEDURE %qs", sym->name, &var_locus,
                     gfc_current_ns->proc_name->name);
          goto cleanup;
        }
@@ -2892,7 +2892,8 @@ variable_decl (int elem)
   /* %FILL components may not have initializers.  */
   if (startswith (name, "%FILL") && gfc_match_eos () != MATCH_YES)
     {
-      gfc_error ("%qs entity cannot have an initializer at %C", "%FILL");
+      gfc_error ("%qs entity cannot have an initializer at %L", "%FILL",
+                &var_locus);
       m = MATCH_ERROR;
       goto cleanup;
     }
@@ -2917,7 +2918,7 @@ variable_decl (int elem)
            {
              if (sym->as != NULL)
                {
-                 gfc_error ("Duplicate array spec for Cray pointee at %C");
+                 gfc_error ("Duplicate array spec for Cray pointee at %L", 
&var_locus);
                  gfc_free_array_spec (cp_as);
                  m = MATCH_ERROR;
                  goto cleanup;
@@ -6696,6 +6697,7 @@ gfc_match_formal_arglist (gfc_symbol *progname, int 
st_flag,
 
   for (;;)
     {
+      gfc_gobble_whitespace ();
       if (gfc_match_char ('*') == MATCH_YES)
        {
          sym = NULL;
@@ -6710,6 +6712,7 @@ gfc_match_formal_arglist (gfc_symbol *progname, int 
st_flag,
        }
       else
        {
+         locus loc = gfc_current_locus;
          m = gfc_match_name (name);
          if (m != MATCH_YES)
            {
@@ -6717,11 +6720,12 @@ gfc_match_formal_arglist (gfc_symbol *progname, int 
st_flag,
                gfc_error_now ("A parameter name is required at %C");
              goto cleanup;
            }
+         loc = gfc_get_location_range (NULL, 0, &loc, 1, &gfc_current_locus);
 
-         if (!typeparam && gfc_get_symbol (name, NULL, &sym))
+         if (!typeparam && gfc_get_symbol (name, NULL, &sym, &loc))
            goto cleanup;
          else if (typeparam
-                  && gfc_get_symbol (name, progname->f2k_derived, &sym))
+                  && gfc_get_symbol (name, progname->f2k_derived, &sym, &loc))
            goto cleanup;
        }
 
@@ -8037,6 +8041,7 @@ gfc_match_subroutine (void)
   if (m != MATCH_YES)
     return m;
 
+  loc = gfc_current_locus;
   m = gfc_match ("subroutine% %n", name);
   if (m != MATCH_YES)
     return m;
@@ -8046,7 +8051,8 @@ gfc_match_subroutine (void)
 
   /* Set declared_at as it might point to, e.g., a PUBLIC statement, if
      the symbol existed before.  */
-  sym->declared_at = gfc_current_locus;
+  sym->declared_at = gfc_get_location_range (NULL, 0, &loc, 1,
+                                            &gfc_current_locus);
 
   if (current_attr.module_procedure)
     sym->attr.module_procedure = 1;
diff --git a/gcc/fortran/error.cc b/gcc/fortran/error.cc
index afe2e49e4994..4e60b148a34c 100644
--- a/gcc/fortran/error.cc
+++ b/gcc/fortran/error.cc
@@ -52,19 +52,45 @@ static int warningcount_buffered, werrorcount_buffered;
 
 
 /* Return a location_t suitable for 'tree' for a gfortran locus.  During
-   parsing in gfortran, loc->lb->location contains only the line number
+   parsing in gfortran, loc->u.lb->location contains only the line number
    and LOCATION_COLUMN is 0; hence, the column has to be added when generating
-   locations for 'tree'.  */
+   locations for 'tree'.  If available, return location_t directly, which
+   might be a range. */
 
 location_t
 gfc_get_location_with_offset (locus *loc, unsigned offset)
 {
-  gcc_checking_assert (loc->nextc >= loc->lb->line);
-  return linemap_position_for_loc_and_offset (line_table, loc->lb->location,
-                                             loc->nextc - loc->lb->line
+  if (loc->nextc == (gfc_char_t *) -1)
+    {
+      gcc_checking_assert (offset == 0);
+      return loc->u.location;
+    }
+  gcc_checking_assert (loc->nextc >= loc->u.lb->line);
+  return linemap_position_for_loc_and_offset (line_table, loc->u.lb->location,
+                                             loc->nextc - loc->u.lb->line
                                              + offset);
 }
 
+/* Convert a locus to a range. */
+
+locus
+gfc_get_location_range (locus *caret_loc, unsigned caret_offset,
+                       locus *start_loc, unsigned start_offset,
+                       locus *end_loc)
+{
+  location_t caret;
+  location_t start = gfc_get_location_with_offset (start_loc, start_offset);
+  location_t end = gfc_get_location_with_offset (end_loc, 0);
+
+  if (caret_loc)
+    caret = gfc_get_location_with_offset (caret_loc, caret_offset);
+
+  locus range;
+  range.nextc = (gfc_char_t *) -1;
+  range.u.location = make_location (caret_loc ? caret : start, start, end);
+  return range;
+}
+
 /* Return buffered_p.  */
 bool
 gfc_buffered_p (void)
diff --git a/gcc/fortran/expr.cc b/gcc/fortran/expr.cc
index 36baa9bb4c8e..65bb9f11815e 100644
--- a/gcc/fortran/expr.cc
+++ b/gcc/fortran/expr.cc
@@ -3912,7 +3912,8 @@ gfc_check_assign (gfc_expr *lvalue, gfc_expr *rvalue, int 
conform,
       if (lvalue->ts.type == BT_LOGICAL && rvalue->ts.type == BT_LOGICAL)
        return true;
 
-      where = lvalue->where.lb ? &lvalue->where : &rvalue->where;
+      where = (GFC_LOCUS_IS_SET (lvalue->where)
+              ? &lvalue->where : &rvalue->where);
       gfc_error ("Incompatible types in DATA statement at %L; attempted "
                 "conversion of %s to %s", where,
                 gfc_typename (rvalue), gfc_typename (lvalue));
diff --git a/gcc/fortran/frontend-passes.cc b/gcc/fortran/frontend-passes.cc
index c7cb9d2a3892..405074ecb02b 100644
--- a/gcc/fortran/frontend-passes.cc
+++ b/gcc/fortran/frontend-passes.cc
@@ -190,7 +190,14 @@ check_locus_code (gfc_code **c, int *walk_subtrees 
ATTRIBUTE_UNUSED,
                  void *data ATTRIBUTE_UNUSED)
 {
   current_code = c;
-  if (c && *c && (((*c)->loc.nextc == NULL) || ((*c)->loc.lb == NULL)))
+  if (c
+      && *c
+      && (((*c)->loc.nextc == NULL)
+         || ((*c)->loc.nextc == (gfc_char_t *) -1
+             && (*c)->loc.u.location == UNKNOWN_LOCATION)
+         || ((*c)->loc.nextc != (gfc_char_t *) -1
+             && ((*c)->loc.u.lb == NULL))))
+
     gfc_warning_internal (0, "Inconsistent internal state: "
                          "No location in statement");
 
@@ -206,7 +213,13 @@ check_locus_expr (gfc_expr **e, int *walk_subtrees 
ATTRIBUTE_UNUSED,
                  void *data ATTRIBUTE_UNUSED)
 {
 
-  if (e && *e && (((*e)->where.nextc == NULL || (*e)->where.lb == NULL)))
+  if (e
+      && *e
+      && (((*e)->where.nextc == NULL)
+         || ((*e)->where.nextc == (gfc_char_t *) -1
+             && (*e)->where.u.location == UNKNOWN_LOCATION)
+         || ((*e)->where.nextc != (gfc_char_t *) -1
+             && ((*e)->where.u.lb == NULL))))
     gfc_warning_internal (0, "Inconsistent internal state: "
                          "No location in expression near %L",
                          &((*current_code)->loc));
@@ -3352,7 +3365,7 @@ runtime_error_ne (gfc_expr *e1, gfc_expr *e2, const char 
*msg)
   gfc_code *c;
   gfc_actual_arglist *a1, *a2, *a3;
 
-  gcc_assert (e1->where.lb);
+  gcc_assert (GFC_LOCUS_IS_SET (e1->where));
   /* Build the call to runtime_error.  */
   c = XCNEW (gfc_code);
   c->op = EXEC_CALL;
diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h
index 7aa9b1312fee..9e81a81686c6 100644
--- a/gcc/fortran/gfortran.h
+++ b/gcc/fortran/gfortran.h
@@ -1087,12 +1087,20 @@ typedef struct gfc_linebuf
 
 #define gfc_linebuf_linenum(LBUF) (LOCATION_LINE ((LBUF)->location))
 
+/* If nextc = (gfc_char_t*) -1, 'location' is used.  */
 typedef struct
 {
   gfc_char_t *nextc;
-  gfc_linebuf *lb;
+  union
+    {
+      gfc_linebuf *lb;
+      location_t location;
+    } u;
 } locus;
 
+#define GFC_LOCUS_IS_SET(loc) \
+  ((loc).nextc == (gfc_char_t *) -1 || (loc).u.lb != NULL)
+
 /* In order for the "gfc" format checking to work correctly, you must
    have declared a typedef locus first.  */
 #if GCC_VERSION >= 4001
@@ -3439,6 +3447,7 @@ const char * gfc_get_string (const char *, ...) 
ATTRIBUTE_PRINTF_1;
 bool gfc_find_sym_in_expr (gfc_symbol *, gfc_expr *);
 
 /* error.cc */
+locus gfc_get_location_range (locus *, unsigned, locus *, unsigned, locus *);
 location_t gfc_get_location_with_offset (locus *, unsigned);
 inline location_t
 gfc_get_location (locus *loc)
@@ -3628,11 +3637,12 @@ gfc_user_op *gfc_get_uop (const char *);
 gfc_user_op *gfc_find_uop (const char *, gfc_namespace *);
 void gfc_free_symbol (gfc_symbol *&);
 bool gfc_release_symbol (gfc_symbol *&);
-gfc_symbol *gfc_new_symbol (const char *, gfc_namespace *);
+gfc_symbol *gfc_new_symbol (const char *, gfc_namespace *, locus * = NULL);
 gfc_symtree* gfc_find_symtree_in_proc (const char *, gfc_namespace *);
 int gfc_find_symbol (const char *, gfc_namespace *, int, gfc_symbol **);
 bool gfc_find_sym_tree (const char *, gfc_namespace *, int, gfc_symtree **);
-int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **);
+int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **,
+                   locus * = NULL);
 bool gfc_verify_c_interop (gfc_typespec *);
 bool gfc_verify_c_interop_param (gfc_symbol *);
 bool verify_bind_c_sym (gfc_symbol *, gfc_typespec *, int, gfc_common_head *);
@@ -3641,9 +3651,10 @@ bool verify_com_block_vars_c_interop (gfc_common_head *);
 gfc_symtree *generate_isocbinding_symbol (const char *, iso_c_binding_symbol,
                                          const char *, gfc_symtree *, bool);
 void gfc_save_symbol_data (gfc_symbol *);
-int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **, bool);
-int gfc_get_ha_symbol (const char *, gfc_symbol **);
-int gfc_get_ha_sym_tree (const char *, gfc_symtree **);
+int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **, bool,
+                    locus * = NULL);
+int gfc_get_ha_symbol (const char *, gfc_symbol **, locus * = NULL);
+int gfc_get_ha_sym_tree (const char *, gfc_symtree **, locus * = NULL);
 
 void gfc_drop_last_undo_checkpoint (void);
 void gfc_restore_last_undo_checkpoint (void);
diff --git a/gcc/fortran/io.cc b/gcc/fortran/io.cc
index 6fd69f7c9a8f..ac4e5c56f454 100644
--- a/gcc/fortran/io.cc
+++ b/gcc/fortran/io.cc
@@ -3761,11 +3761,11 @@ static bool
 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
                      locus *spec_end)
 {
-#define io_constraint(condition, msg, arg)\
+#define io_constraint(condition, msg, where)\
 if (condition) \
   {\
-    if ((arg)->lb != NULL)\
-      gfc_error ((msg), (arg));\
+    if (GFC_LOCUS_IS_SET (*where))\
+      gfc_error ((msg), (where));\
     else\
       gfc_error ((msg), spec_end);\
     return false;\
diff --git a/gcc/fortran/match.cc b/gcc/fortran/match.cc
index 0cd78a57a2f7..3a993ede880b 100644
--- a/gcc/fortran/match.cc
+++ b/gcc/fortran/match.cc
@@ -675,16 +675,21 @@ gfc_match_sym_tree (gfc_symtree **matched_symbol, int 
host_assoc)
 {
   char buffer[GFC_MAX_SYMBOL_LEN + 1];
   match m;
+  int ret;
 
+  locus loc = gfc_current_locus;
   m = gfc_match_name (buffer);
   if (m != MATCH_YES)
     return m;
-
+  loc = gfc_get_location_range (NULL, 0, &loc, 1, &gfc_current_locus);
   if (host_assoc)
-    return (gfc_get_ha_sym_tree (buffer, matched_symbol))
-           ? MATCH_ERROR : MATCH_YES;
+    {
+      ret = gfc_get_ha_sym_tree (buffer, matched_symbol, &loc);
+      return ret ? MATCH_ERROR : MATCH_YES;
+    }
 
-  if (gfc_get_sym_tree (buffer, NULL, matched_symbol, false))
+  ret = gfc_get_sym_tree (buffer, NULL, matched_symbol, false, &loc);
+  if (ret)
     return MATCH_ERROR;
 
   return MATCH_YES;
diff --git a/gcc/fortran/openmp.cc b/gcc/fortran/openmp.cc
index 2c12f5e362d6..7aa0d5974444 100644
--- a/gcc/fortran/openmp.cc
+++ b/gcc/fortran/openmp.cc
@@ -424,15 +424,18 @@ gfc_match_omp_variable_list (const char *str, 
gfc_omp_namelist **list,
 
   for (;;)
     {
+      gfc_gobble_whitespace ();
       cur_loc = gfc_current_locus;
 
       m = gfc_match_name (n);
       if (m == MATCH_YES && strcmp (n, "omp_all_memory") == 0)
        {
+         locus loc = gfc_get_location_range (NULL, 0, &cur_loc, 1,
+                                             &gfc_current_locus);
          if (!has_all_memory)
            {
-             gfc_error ("%<omp_all_memory%> at %C not permitted in this "
-                        "clause");
+             gfc_error ("%<omp_all_memory%> at %L not permitted in this "
+                        "clause", &loc);
              goto cleanup;
            }
          *has_all_memory = true;
@@ -444,7 +447,7 @@ gfc_match_omp_variable_list (const char *str, 
gfc_omp_namelist **list,
              tail->next = p;
              tail = tail->next;
            }
-         tail->where = cur_loc;
+         tail->where = loc;
          goto next_item;
        }
       if (m == MATCH_YES)
@@ -476,7 +479,8 @@ gfc_match_omp_variable_list (const char *str, 
gfc_omp_namelist **list,
                }
              if (gfc_is_coindexed (expr))
                {
-                 gfc_error ("List item shall not be coindexed at %C");
+                 gfc_error ("List item shall not be coindexed at %L",
+                            &expr->where);
                  goto cleanup;
                }
            }
@@ -491,7 +495,8 @@ gfc_match_omp_variable_list (const char *str, 
gfc_omp_namelist **list,
            }
          tail->sym = sym;
          tail->expr = expr;
-         tail->where = cur_loc;
+         tail->where = gfc_get_location_range (NULL, 0, &cur_loc, 1,
+                                               &gfc_current_locus);
          if (reject_common_vars && sym->attr.in_common)
            {
              gcc_assert (allow_common);
@@ -511,16 +516,18 @@ gfc_match_omp_variable_list (const char *str, 
gfc_omp_namelist **list,
       if (!allow_common)
        goto syntax;
 
-      m = gfc_match (" / %n /", n);
+      m = gfc_match ("/ %n /", n);
       if (m == MATCH_ERROR)
        goto cleanup;
       if (m == MATCH_NO)
        goto syntax;
 
+      cur_loc = gfc_get_location_range (NULL, 0, &cur_loc, 1,
+                                       &gfc_current_locus);
       st = gfc_find_symtree (gfc_current_ns->common_root, n);
       if (st == NULL)
        {
-         gfc_error ("COMMON block /%s/ not found at %C", n);
+         gfc_error ("COMMON block %</%s/%> not found at %L", n, &cur_loc);
          goto cleanup;
        }
       for (sym = st->n.common->head; sym; sym = sym->common_next)
@@ -699,14 +706,17 @@ gfc_match_omp_doacross_sink (gfc_omp_namelist **list, 
bool depend)
 
   for (;;)
     {
+      gfc_gobble_whitespace ();
       cur_loc = gfc_current_locus;
 
       if (gfc_match_name (n) != MATCH_YES)
        goto syntax;
+      locus loc = gfc_get_location_range (NULL, 0, &cur_loc, 1,
+                                         &gfc_current_locus);
       if (UNLIKELY (strcmp (n, "omp_all_memory") == 0))
        {
          gfc_error ("%<omp_all_memory%> used with dependence-type "
-                    "other than OUT or INOUT at %C");
+                    "other than OUT or INOUT at %L", &loc);
          goto cleanup;
        }
       sym = NULL;
@@ -733,7 +743,7 @@ gfc_match_omp_doacross_sink (gfc_omp_namelist **list, bool 
depend)
        }
       tail->sym = sym;
       tail->expr = NULL;
-      tail->where = cur_loc;
+      tail->where = loc;
       if (gfc_match_char ('+') == MATCH_YES)
        {
          if (gfc_match_literal_constant (&tail->expr, 0) != MATCH_YES)
diff --git a/gcc/fortran/parse.cc b/gcc/fortran/parse.cc
index 9e06dbf0911d..1821871819bc 100644
--- a/gcc/fortran/parse.cc
+++ b/gcc/fortran/parse.cc
@@ -1799,7 +1799,7 @@ blank_line:
   if (digit_flag)
     gfc_error_now ("Statement label without statement at %L", &label_locus);
 
-  gfc_current_locus.lb->truncated = 0;
+  gfc_current_locus.u.lb->truncated = 0;
   gfc_advance_line ();
   return ST_NONE;
 }
diff --git a/gcc/fortran/primary.cc b/gcc/fortran/primary.cc
index e114bf1375f0..b93ee56fb357 100644
--- a/gcc/fortran/primary.cc
+++ b/gcc/fortran/primary.cc
@@ -2669,7 +2669,7 @@ gfc_match_varspec (gfc_expr *primary, int equiv_flag, 
bool sub_flag,
 
       if (tmp && tmp->type == REF_INQUIRY)
        {
-         if (!primary->where.lb || !primary->where.nextc)
+         if (!primary->where.u.lb || !primary->where.nextc)
            primary->where = gfc_current_locus;
          gfc_simplify_expr (primary, 0);
 
@@ -4444,7 +4444,6 @@ match_variable (gfc_expr **result, int equiv_flag, int 
host_flag)
   expr->expr_type = EXPR_VARIABLE;
   expr->symtree = st;
   expr->ts = sym->ts;
-  expr->where = where;
 
   /* Now see if we have to do more.  */
   m = gfc_match_varspec (expr, equiv_flag, false, false);
@@ -4454,6 +4453,7 @@ match_variable (gfc_expr **result, int equiv_flag, int 
host_flag)
       return m;
     }
 
+  expr->where = gfc_get_location_range (NULL, 0, &where, 1, 
&gfc_current_locus);
   *result = expr;
   return MATCH_YES;
 }
diff --git a/gcc/fortran/resolve.cc b/gcc/fortran/resolve.cc
index ebe449e71190..0ff63beb6a8f 100644
--- a/gcc/fortran/resolve.cc
+++ b/gcc/fortran/resolve.cc
@@ -5196,7 +5196,8 @@ find_array_spec (gfc_expr *e)
       case REF_ARRAY:
        if (as == NULL)
          {
-           locus loc = ref->u.ar.where.lb ? ref->u.ar.where : e->where;
+           locus loc = (GFC_LOCUS_IS_SET (ref->u.ar.where)
+                        ? ref->u.ar.where : e->where);
            gfc_error ("Invalid array reference of a non-array entity at %L",
                       &loc);
            return false;
diff --git a/gcc/fortran/scanner.cc b/gcc/fortran/scanner.cc
index 0631e7b8284c..3d853aca0f34 100644
--- a/gcc/fortran/scanner.cc
+++ b/gcc/fortran/scanner.cc
@@ -536,7 +536,7 @@ gfc_at_eof (void)
   if (line_head == NULL)
     return 1;                  /* Null file */
 
-  if (gfc_current_locus.lb == NULL)
+  if (gfc_current_locus.u.lb == NULL)
     return 1;
 
   return 0;
@@ -551,7 +551,7 @@ gfc_at_bol (void)
   if (gfc_at_eof ())
     return 1;
 
-  return (gfc_current_locus.nextc == gfc_current_locus.lb->line);
+  return (gfc_current_locus.nextc == gfc_current_locus.u.lb->line);
 }
 
 
@@ -609,7 +609,7 @@ gfc_start_source_files (void)
     (*debug_hooks->start_source_file) (0, gfc_source_file);
 
   file_changes_cur = 0;
-  report_file_change (gfc_current_locus.lb);
+  report_file_change (gfc_current_locus.u.lb);
 }
 
 void
@@ -629,23 +629,23 @@ gfc_advance_line (void)
   if (gfc_at_end ())
     return;
 
-  if (gfc_current_locus.lb == NULL) 
+  if (gfc_current_locus.u.lb == NULL)
     {
       end_flag = 1;
       return;
     } 
 
-  if (gfc_current_locus.lb->next
-      && !gfc_current_locus.lb->next->dbg_emitted)
+  if (gfc_current_locus.u.lb->next
+      && !gfc_current_locus.u.lb->next->dbg_emitted)
     {
-      report_file_change (gfc_current_locus.lb->next);
-      gfc_current_locus.lb->next->dbg_emitted = true;
+      report_file_change (gfc_current_locus.u.lb->next);
+      gfc_current_locus.u.lb->next->dbg_emitted = true;
     }
 
-  gfc_current_locus.lb = gfc_current_locus.lb->next;
+  gfc_current_locus.u.lb = gfc_current_locus.u.lb->next;
 
-  if (gfc_current_locus.lb != NULL)     
-    gfc_current_locus.nextc = gfc_current_locus.lb->line;
+  if (gfc_current_locus.u.lb != NULL)
+    gfc_current_locus.nextc = gfc_current_locus.u.lb->line;
   else 
     {
       gfc_current_locus.nextc = NULL;
@@ -714,7 +714,7 @@ gfc_define_undef_line (void)
   if (wide_strncmp (gfc_current_locus.nextc, "#define ", 8) == 0)
     {
       tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[8], -1);
-      (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.lb),
+      (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.u.lb),
                              tmp);
       free (tmp);
     }
@@ -722,7 +722,7 @@ gfc_define_undef_line (void)
   if (wide_strncmp (gfc_current_locus.nextc, "#undef ", 7) == 0)
     {
       tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[7], -1);
-      (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.lb),
+      (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.u.lb),
                             tmp);
       free (tmp);
     }
@@ -1099,9 +1099,9 @@ skip_fixed_comments (void)
              return;
            }
 
-         if (gfc_current_locus.lb != NULL
-             && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
-           continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
+         if (gfc_current_locus.u.lb != NULL
+             && continue_line < gfc_linebuf_linenum (gfc_current_locus.u.lb))
+           continue_line = gfc_linebuf_linenum (gfc_current_locus.u.lb);
 
          /* If -fopenmp/-fopenacc, we need to handle here 2 things:
             1) don't treat !$omp/!$acc|c$omp/c$acc|*$omp / *$acc as comments, 
@@ -1221,9 +1221,9 @@ check_for_digits:
 
       if (col != 6 && c == '!')
        {
-         if (gfc_current_locus.lb != NULL
-             && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
-           continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
+         if (gfc_current_locus.u.lb != NULL
+             && continue_line < gfc_linebuf_linenum (gfc_current_locus.u.lb))
+           continue_line = gfc_linebuf_linenum (gfc_current_locus.u.lb);
          skip_comment_line ();
          continue;
        }
@@ -1305,20 +1305,20 @@ restart:
          while (c != '\n');
 
          /* Avoid truncation warnings for comment ending lines.  */
-         gfc_current_locus.lb->truncated = 0;
+         gfc_current_locus.u.lb->truncated = 0;
 
          goto done;
        }
 
       /* Check to see if the continuation line was truncated.  */
-      if (warn_line_truncation && gfc_current_locus.lb != NULL
-         && gfc_current_locus.lb->truncated)
+      if (warn_line_truncation && gfc_current_locus.u.lb != NULL
+         && gfc_current_locus.u.lb->truncated)
        {
          int maxlen = flag_free_line_length;
          gfc_char_t *current_nextc = gfc_current_locus.nextc;
 
-         gfc_current_locus.lb->truncated = 0;
-         gfc_current_locus.nextc =  gfc_current_locus.lb->line + maxlen;
+         gfc_current_locus.u.lb->truncated = 0;
+         gfc_current_locus.nextc =  gfc_current_locus.u.lb->line + maxlen;
          gfc_warning_now (OPT_Wline_truncation,
                           "Line truncated at %L", &gfc_current_locus);
          gfc_current_locus.nextc = current_nextc;
@@ -1363,9 +1363,9 @@ restart:
         without getting reset (e.g. via input_stmt). It also happens
         when pre-including files via -fpre-include=.  */
       if (continue_count == 0
-         && gfc_current_locus.lb
-         && continue_line > gfc_linebuf_linenum (gfc_current_locus.lb) + 1)
-       continue_line = gfc_linebuf_linenum (gfc_current_locus.lb) + 1;
+         && gfc_current_locus.u.lb
+         && continue_line > gfc_linebuf_linenum (gfc_current_locus.u.lb) + 1)
+       continue_line = gfc_linebuf_linenum (gfc_current_locus.u.lb) + 1;
 
       continue_flag = 1;
       if (c == '!')
@@ -1379,7 +1379,7 @@ restart:
       /* We've got a continuation line.  If we are on the very next line after
         the last continuation, increment the continuation line count and
         check whether the limit has been exceeded.  */
-      if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1)
+      if (gfc_linebuf_linenum (gfc_current_locus.u.lb) == continue_line + 1)
        {
          if (++continue_count == gfc_option.max_continue_free)
            {
@@ -1392,9 +1392,9 @@ restart:
       /* Now find where it continues. First eat any comment lines.  */
       openmp_cond_flag = skip_free_comments ();
 
-      if (gfc_current_locus.lb != NULL
-         && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
-       continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
+      if (gfc_current_locus.u.lb != NULL
+         && continue_line < gfc_linebuf_linenum (gfc_current_locus.u.lb))
+       continue_line = gfc_linebuf_linenum (gfc_current_locus.u.lb);
 
       if (flag_openmp)
        if (prev_openmp_flag != openmp_flag && !openacc_flag)
@@ -1461,7 +1461,7 @@ restart:
                is_openmp = 1;
            }
          if (omp_acc_err_loc.nextc != gfc_current_locus.nextc
-             || omp_acc_err_loc.lb != gfc_current_locus.lb)
+             || omp_acc_err_loc.u.lb != gfc_current_locus.u.lb)
            gfc_error_now (is_openmp
                           ? G_("Wrong OpenACC continuation at %C: "
                                "expected !$ACC, got !$OMP")
@@ -1511,17 +1511,17 @@ restart:
          while (c != '\n');
 
          /* Avoid truncation warnings for comment ending lines.  */
-         gfc_current_locus.lb->truncated = 0;
+         gfc_current_locus.u.lb->truncated = 0;
        }
 
       if (c != '\n')
        goto done;
 
       /* Check to see if the continuation line was truncated.  */
-      if (warn_line_truncation && gfc_current_locus.lb != NULL
-         && gfc_current_locus.lb->truncated)
+      if (warn_line_truncation && gfc_current_locus.u.lb != NULL
+         && gfc_current_locus.u.lb->truncated)
        {
-         gfc_current_locus.lb->truncated = 0;
+         gfc_current_locus.u.lb->truncated = 0;
          gfc_warning_now (OPT_Wline_truncation,
                           "Line truncated at %L", &gfc_current_locus);
        }
@@ -1535,9 +1535,9 @@ restart:
         without getting reset (e.g. via input_stmt). It also happens
         when pre-including files via -fpre-include=.  */
       if (continue_count == 0
-         && gfc_current_locus.lb
-         && continue_line > gfc_linebuf_linenum (gfc_current_locus.lb) + 1)
-       continue_line = gfc_linebuf_linenum (gfc_current_locus.lb) + 1;
+         && gfc_current_locus.u.lb
+         && continue_line > gfc_linebuf_linenum (gfc_current_locus.u.lb) + 1)
+       continue_line = gfc_linebuf_linenum (gfc_current_locus.u.lb) + 1;
 
       continue_flag = 1;
       old_loc = gfc_current_locus;
@@ -1570,7 +1570,7 @@ restart:
                is_openmp = 1;
            }
          if (omp_acc_err_loc.nextc != gfc_current_locus.nextc
-             || omp_acc_err_loc.lb != gfc_current_locus.lb)
+             || omp_acc_err_loc.u.lb != gfc_current_locus.u.lb)
            gfc_error_now (is_openmp
                           ? G_("Wrong OpenACC continuation at %C: "
                                "expected !$ACC, got !$OMP")
@@ -1608,7 +1608,7 @@ restart:
       /* We've got a continuation line.  If we are on the very next line after
         the last continuation, increment the continuation line count and
         check whether the limit has been exceeded.  */
-      if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1)
+      if (gfc_linebuf_linenum (gfc_current_locus.u.lb) == continue_line + 1)
        {
          if (++continue_count == gfc_option.max_continue_fixed)
            {
@@ -1619,9 +1619,9 @@ restart:
            }
        }
 
-      if (gfc_current_locus.lb != NULL
-         && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
-       continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
+      if (gfc_current_locus.u.lb != NULL
+         && continue_line < gfc_linebuf_linenum (gfc_current_locus.u.lb))
+       continue_line = gfc_linebuf_linenum (gfc_current_locus.u.lb);
     }
 
   /* Ready to read first character of continuation line, which might
@@ -1760,7 +1760,7 @@ gfc_gobble_whitespace (void)
         line will be scanned multiple times.  */
       if (warn_tabs && c == '\t')
        {
-         int cur_linenum = LOCATION_LINE (gfc_current_locus.lb->location);
+         int cur_linenum = LOCATION_LINE (gfc_current_locus.u.lb->location);
          if (cur_linenum != linenum)
            {
              linenum = cur_linenum;
@@ -2424,7 +2424,7 @@ include_stmt (gfc_linebuf *b)
   openacc_flag = 0;
   continue_count = 0;
   continue_line = 0;
-  gfc_current_locus.lb = b;
+  gfc_current_locus.u.lb = b;
   gfc_current_locus.nextc = b->line;
 
   gfc_skip_comments ();
@@ -2782,7 +2782,7 @@ gfc_new_file (void)
   else
     load_file (gfc_source_file, NULL, true);
 
-  gfc_current_locus.lb = line_head;
+  gfc_current_locus.u.lb = line_head;
   gfc_current_locus.nextc = (line_head == NULL) ? NULL : line_head->line;
 
 #if 0 /* Debugging aid.  */
diff --git a/gcc/fortran/symbol.cc b/gcc/fortran/symbol.cc
index 557bd3bcc34c..e803cdd93c9a 100644
--- a/gcc/fortran/symbol.cc
+++ b/gcc/fortran/symbol.cc
@@ -3254,7 +3254,7 @@ gfc_release_symbol (gfc_symbol *&sym)
 /* Allocate and initialize a new symbol node.  */
 
 gfc_symbol *
-gfc_new_symbol (const char *name, gfc_namespace *ns)
+gfc_new_symbol (const char *name, gfc_namespace *ns, locus *where)
 {
   gfc_symbol *p;
 
@@ -3263,7 +3263,7 @@ gfc_new_symbol (const char *name, gfc_namespace *ns)
   gfc_clear_ts (&p->ts);
   gfc_clear_attr (&p->attr);
   p->ns = ns;
-  p->declared_at = gfc_current_locus;
+  p->declared_at = where ? *where : gfc_current_locus;
   p->name = gfc_get_string ("%s", name);
 
   return p;
@@ -3477,7 +3477,7 @@ gfc_save_symbol_data (gfc_symbol *sym)
 
 int
 gfc_get_sym_tree (const char *name, gfc_namespace *ns, gfc_symtree **result,
-                 bool allow_subroutine)
+                 bool allow_subroutine, locus *where)
 {
   gfc_symtree *st;
   gfc_symbol *p;
@@ -3498,7 +3498,7 @@ gfc_get_sym_tree (const char *name, gfc_namespace *ns, 
gfc_symtree **result,
   if (st == NULL)
     {
       /* If not there, create a new symbol.  */
-      p = gfc_new_symbol (name, ns);
+      p = gfc_new_symbol (name, ns, where);
 
       /* Add to the list of tentative symbols.  */
       p->old_symbol = NULL;
@@ -3546,12 +3546,13 @@ gfc_get_sym_tree (const char *name, gfc_namespace *ns, 
gfc_symtree **result,
 
 
 int
-gfc_get_symbol (const char *name, gfc_namespace *ns, gfc_symbol **result)
+gfc_get_symbol (const char *name, gfc_namespace *ns, gfc_symbol **result,
+               locus *where)
 {
   gfc_symtree *st;
   int i;
 
-  i = gfc_get_sym_tree (name, ns, &st, false);
+  i = gfc_get_sym_tree (name, ns, &st, false, where);
   if (i != 0)
     return i;
 
@@ -3567,7 +3568,7 @@ gfc_get_symbol (const char *name, gfc_namespace *ns, 
gfc_symbol **result)
    exist, but tries to host-associate the symbol if possible.  */
 
 int
-gfc_get_ha_sym_tree (const char *name, gfc_symtree **result)
+gfc_get_ha_sym_tree (const char *name, gfc_symtree **result, locus *where)
 {
   gfc_symtree *st;
   int i;
@@ -3591,17 +3592,17 @@ gfc_get_ha_sym_tree (const char *name, gfc_symtree 
**result)
       return 0;
     }
 
-  return gfc_get_sym_tree (name, gfc_current_ns, result, false);
+  return gfc_get_sym_tree (name, gfc_current_ns, result, false, where);
 }
 
 
 int
-gfc_get_ha_symbol (const char *name, gfc_symbol **result)
+gfc_get_ha_symbol (const char *name, gfc_symbol **result, locus *where)
 {
   int i;
   gfc_symtree *st = NULL;
 
-  i = gfc_get_ha_sym_tree (name, &st);
+  i = gfc_get_ha_sym_tree (name, &st, where);
 
   if (st)
     *result = st->n.sym;
diff --git a/gcc/fortran/trans-array.cc b/gcc/fortran/trans-array.cc
index 160a543bda27..dbf7bc880a40 100644
--- a/gcc/fortran/trans-array.cc
+++ b/gcc/fortran/trans-array.cc
@@ -2349,10 +2349,12 @@ gfc_trans_array_constructor_value (stmtblock_t * pblock,
     {
       symbol_attribute attr;
       gfc_se fse;
-      gfc_warning (0, "The structure constructor at %C has been"
+      locus loc;
+      gfc_locus_from_location (&loc, input_location);
+      gfc_warning (0, "The structure constructor at %L has been"
                         " finalized. This feature was removed by f08/0011."
                         " Use -std=f2018 or -std=gnu to eliminate the"
-                        " finalization.");
+                        " finalization.", &loc);
       attr.pointer = attr.allocatable = 0;
       gfc_init_se (&fse, NULL);
       fse.expr = desc;
@@ -7099,14 +7101,13 @@ gfc_trans_g77_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
 {
   tree parm;
   tree type;
-  locus loc;
   tree offset;
   tree tmp;
   tree stmt;
   stmtblock_t init;
 
-  gfc_save_backend_locus (&loc);
-  gfc_set_backend_locus (&sym->declared_at);
+  location_t loc = input_location;
+  input_location = gfc_get_location (&sym->declared_at);
 
   /* Descriptor type.  */
   parm = sym->backend_decl;
@@ -7141,7 +7142,7 @@ gfc_trans_g77_array (gfc_symbol * sym, gfc_wrapped_block 
* block)
     }
   stmt = gfc_finish_block (&init);
 
-  gfc_restore_backend_locus (&loc);
+  input_location = loc;
 
   /* Add the initialization code to the start of the function.  */
 
@@ -7181,7 +7182,6 @@ gfc_trans_dummy_array_bias (gfc_symbol * sym, tree 
tmpdesc,
   tree size;
   tree type;
   tree offset;
-  locus loc;
   stmtblock_t init;
   tree stmtInit, stmtCleanup;
   tree lbound;
@@ -7217,13 +7217,8 @@ gfc_trans_dummy_array_bias (gfc_symbol * sym, tree 
tmpdesc,
       return;
     }
 
-  loc.nextc = NULL;
-  gfc_save_backend_locus (&loc);
-  /* loc.nextc is not set by save_backend_locus but the location routines
-     depend on it.  */
-  if (loc.nextc == NULL)
-    loc.nextc = loc.lb->line;
-  gfc_set_backend_locus (&sym->declared_at);
+  location_t loc = input_location;
+  input_location = gfc_get_location (&sym->declared_at);
 
   /* Descriptor type.  */
   type = TREE_TYPE (tmpdesc);
@@ -7293,8 +7288,12 @@ gfc_trans_dummy_array_bias (gfc_symbol * sym, tree 
tmpdesc,
       stride = gfc_index_one_node;
 
       if (warn_array_temporaries)
-       gfc_warning (OPT_Warray_temporaries,
-                    "Creating array temporary at %L", &loc);
+       {
+         locus where;
+         gfc_locus_from_location (&where, loc);
+         gfc_warning (OPT_Warray_temporaries,
+                    "Creating array temporary at %L", &where);
+       }
     }
 
   /* This is for the case where the array data is used directly without
@@ -7363,7 +7362,9 @@ gfc_trans_dummy_array_bias (gfc_symbol * sym, tree 
tmpdesc,
              /* Check (ubound(a) - lbound(a) == ubound(b) - lbound(b)).  */
              char * msg;
              tree temp;
+             locus where;
 
+             gfc_locus_from_location (&where, loc);
              temp = fold_build2_loc (input_location, MINUS_EXPR,
                                      gfc_array_index_type, ubound, lbound);
              temp = fold_build2_loc (input_location, PLUS_EXPR,
@@ -7380,7 +7381,7 @@ gfc_trans_dummy_array_bias (gfc_symbol * sym, tree 
tmpdesc,
              msg = xasprintf ("Dimension %d of array '%s' has extent "
                               "%%ld instead of %%ld", n+1, sym->name);
 
-             gfc_trans_runtime_check (true, false, tmp, &init, &loc, msg,
+             gfc_trans_runtime_check (true, false, tmp, &init, &where, msg,
                        fold_convert (long_integer_type_node, temp),
                        fold_convert (long_integer_type_node, stride2));
 
@@ -7532,7 +7533,7 @@ gfc_trans_dummy_array_bias (gfc_symbol * sym, tree 
tmpdesc,
      be freed at the end of the function by pop_context.  */
   gfc_add_init_cleanup (block, stmtInit, stmtCleanup);
 
-  gfc_restore_backend_locus (&loc);
+  input_location = loc;
 }
 
 
@@ -11839,7 +11840,6 @@ gfc_trans_class_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
   tree tmp;
   tree descriptor;
   stmtblock_t init;
-  locus loc;
   int rank;
 
   /* Make sure the frontend gets these right.  */
@@ -11859,8 +11859,8 @@ gfc_trans_class_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
   if (type == NULL || !GFC_DESCRIPTOR_TYPE_P (type))
     return;
 
-  gfc_save_backend_locus (&loc);
-  gfc_set_backend_locus (&sym->declared_at);
+  location_t loc = input_location;
+  input_location = gfc_get_location (&sym->declared_at);
   gfc_init_block (&init);
 
   rank = CLASS_DATA (sym)->as ? (CLASS_DATA (sym)->as->rank) : (0);
@@ -11872,7 +11872,7 @@ gfc_trans_class_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
   gfc_add_expr_to_block (&init, tmp);
 
   gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
-  gfc_restore_backend_locus (&loc);
+  input_location = loc;
 }
 
 
@@ -11889,7 +11889,6 @@ gfc_trans_deferred_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
   tree descriptor;
   stmtblock_t init;
   stmtblock_t cleanup;
-  locus loc;
   int rank;
   bool sym_has_alloc_comp, has_finalizer;
 
@@ -11903,8 +11902,8 @@ gfc_trans_deferred_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
              || has_finalizer
              || (sym->as->type == AS_ASSUMED_RANK && sym->attr.dummy));
 
-  gfc_save_backend_locus (&loc);
-  gfc_set_backend_locus (&sym->declared_at);
+  location_t loc = input_location;
+  input_location = gfc_get_location (&sym->declared_at);
   gfc_init_block (&init);
 
   gcc_assert (VAR_P (sym->backend_decl)
@@ -11933,7 +11932,7 @@ gfc_trans_deferred_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
   if (sym->attr.dummy || sym->attr.use_assoc || sym->attr.result)
     {
       gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
-      gfc_restore_backend_locus (&loc);
+      input_location = loc;
       return;
     }
 
@@ -11948,7 +11947,7 @@ gfc_trans_deferred_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
       gfc_trans_static_array_pointer (sym);
 
       gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
-      gfc_restore_backend_locus (&loc);
+      input_location = loc;
       return;
     }
 
@@ -12013,7 +12012,7 @@ gfc_trans_deferred_array (gfc_symbol * sym, 
gfc_wrapped_block * block)
                             gfc_get_dtype_rank_type (sym->as->rank, etype));
       gfc_add_expr_to_block (&init, tmp);
     }
-  gfc_restore_backend_locus (&loc);
+  input_location = loc;
   gfc_init_block (&cleanup);
 
   /* Allocatable arrays need to be freed when they go out of scope.
diff --git a/gcc/fortran/trans-common.cc b/gcc/fortran/trans-common.cc
index 481d468040e0..49b0c3de4716 100644
--- a/gcc/fortran/trans-common.cc
+++ b/gcc/fortran/trans-common.cc
@@ -382,7 +382,7 @@ build_equiv_decl (tree union_type, bool is_init, bool 
is_saved, bool is_auto)
 
   /* The source location has been lost, and doesn't really matter.
      We need to set it to something though.  */
-  gfc_set_decl_location (decl, &gfc_current_locus);
+  DECL_SOURCE_LOCATION (decl) = input_location;
 
   gfc_add_decl_to_function (decl);
 
@@ -611,8 +611,7 @@ get_init_field (segment_info *head, tree union_type, tree 
*field_init,
   tmp = build_range_type (gfc_array_index_type,
                          gfc_index_zero_node, tmp);
   tmp = build_array_type (type, tmp);
-  field = build_decl (gfc_get_location (&gfc_current_locus),
-                     FIELD_DECL, NULL_TREE, tmp);
+  field = build_decl (input_location, FIELD_DECL, NULL_TREE, tmp);
 
   known_align = BIGGEST_ALIGNMENT;
 
diff --git a/gcc/fortran/trans-decl.cc b/gcc/fortran/trans-decl.cc
index 9cced7c02e40..a62fe3f0441c 100644
--- a/gcc/fortran/trans-decl.cc
+++ b/gcc/fortran/trans-decl.cc
@@ -2278,15 +2278,13 @@ gfc_get_extern_function_decl (gfc_symbol * sym, 
gfc_actual_arglist *actual_args,
        {
          /* By construction, the external function cannot be
             a contained procedure.  */
-         locus old_loc;
-
-         gfc_save_backend_locus (&old_loc);
+         location_t old_loc = input_location;
          push_cfun (NULL);
 
          gfc_create_function_decl (gsym->ns, true);
 
          pop_cfun ();
-         gfc_restore_backend_locus (&old_loc);
+         input_location = old_loc;
        }
 
       /* If the namespace has entries, the proc_name is the
@@ -2491,7 +2489,7 @@ build_function_decl (gfc_symbol * sym, bool global)
 
   /* Set the line and filename.  sym->declared_at seems to point to the
      last statement for subroutines, but it'll do for now.  */
-  gfc_set_backend_locus (&sym->declared_at);
+  input_location = gfc_get_location (&sym->declared_at);
 
   /* Allow only one nesting level.  Allow public declarations.  */
   gcc_assert (current_function_decl == NULL_TREE
@@ -3049,12 +3047,12 @@ build_entry_thunks (gfc_namespace * ns, bool global)
   stmtblock_t body;
   tree thunk_fndecl;
   tree tmp;
-  locus old_loc;
+  location_t old_loc;
 
   /* This should always be a toplevel function.  */
   gcc_assert (current_function_decl == NULL_TREE);
 
-  gfc_save_backend_locus (&old_loc);
+  old_loc = input_location;
   for (el = ns->entries; el; el = el->next)
     {
       vec<tree, va_gc> *args = NULL;
@@ -3221,7 +3219,7 @@ build_entry_thunks (gfc_namespace * ns, bool global)
        }
     }
 
-  gfc_restore_backend_locus (&old_loc);
+  input_location = old_loc;
 }
 
 
@@ -4559,7 +4557,7 @@ init_intent_out_dt (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
 
 static tree
 gfc_null_and_pass_deferred_len (gfc_symbol *sym, stmtblock_t *init,
-                               locus *loc)
+                               location_t loc)
 {
   tree tmp;
 
@@ -4589,7 +4587,7 @@ gfc_null_and_pass_deferred_len (gfc_symbol *sym, 
stmtblock_t *init,
       gfc_add_expr_to_block (init, tmp2);
     }
 
-  gfc_restore_backend_locus (loc);
+  input_location = loc;
 
   /* Pass the final character length back.  */
   if (sym->attr.intent != INTENT_IN)
@@ -4641,7 +4639,7 @@ get_proc_result (gfc_symbol* sym)
 void
 gfc_trans_deferred_vars (gfc_symbol * proc_sym, gfc_wrapped_block * block)
 {
-  locus loc;
+  location_t loc;
   gfc_symbol *sym;
   gfc_formal_arglist *f;
   stmtblock_t tmpblock;
@@ -4674,8 +4672,8 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
       else if (proc_sym->as)
        {
          tree result = TREE_VALUE (current_fake_result_decl);
-         gfc_save_backend_locus (&loc);
-         gfc_set_backend_locus (&proc_sym->declared_at);
+         loc = input_location;
+         input_location = gfc_get_location (&proc_sym->declared_at);
          gfc_trans_dummy_array_bias (proc_sym, result, block);
 
          /* An automatic character length, pointer array result.  */
@@ -4686,7 +4684,7 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
              if (proc_sym->ts.deferred)
                {
                  gfc_start_block (&init);
-                 tmp = gfc_null_and_pass_deferred_len (proc_sym, &init, &loc);
+                 tmp = gfc_null_and_pass_deferred_len (proc_sym, &init, loc);
                  gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
                }
              else
@@ -4698,8 +4696,8 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
          if (proc_sym->ts.deferred)
            {
              tmp = NULL;
-             gfc_save_backend_locus (&loc);
-             gfc_set_backend_locus (&proc_sym->declared_at);
+             loc = input_location;
+             input_location = gfc_get_location (&proc_sym->declared_at);
              gfc_start_block (&init);
              /* Zero the string length on entry.  */
              gfc_add_modify (&init, proc_sym->ts.u.cl->backend_decl,
@@ -4714,7 +4712,7 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
              gfc_add_modify (&init, tmp,
                              fold_convert (TREE_TYPE (se.expr),
                                            null_pointer_node));
-             gfc_restore_backend_locus (&loc);
+             input_location = loc;
 
              /* Pass back the string length on exit.  */
              tmp = proc_sym->ts.u.cl->backend_decl;
@@ -4759,10 +4757,10 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
   /* Initialize the INTENT(OUT) derived type dummy arguments.  This
      should be done here so that the offsets and lbounds of arrays
      are available.  */
-  gfc_save_backend_locus (&loc);
-  gfc_set_backend_locus (&proc_sym->declared_at);
+  loc = input_location;
+  input_location = gfc_get_location (&proc_sym->declared_at);
   init_intent_out_dt (proc_sym, block);
-  gfc_restore_backend_locus (&loc);
+  input_location = loc;
 
   /* For some reasons, internal procedures point to the parent's
      namespace.  Top-level procedure and variables inside BLOCK are fine.  */
@@ -4967,10 +4965,10 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
                {
                  if (TREE_STATIC (sym->backend_decl))
                    {
-                     gfc_save_backend_locus (&loc);
-                     gfc_set_backend_locus (&sym->declared_at);
+                     loc = input_location;
+                     input_location = gfc_get_location (&sym->declared_at);
                      gfc_trans_static_array_pointer (sym);
-                     gfc_restore_backend_locus (&loc);
+                     input_location = loc;
                    }
                  else
                    {
@@ -4990,8 +4988,8 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
                }
              else
                {
-                 gfc_save_backend_locus (&loc);
-                 gfc_set_backend_locus (&sym->declared_at);
+                 loc = input_location;
+                 input_location = gfc_get_location (&sym->declared_at);
 
                  if (alloc_comp_or_fini)
                    {
@@ -5012,7 +5010,7 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
 
                  gfc_trans_auto_array_allocation (sym->backend_decl,
                                                   sym, block);
-                 gfc_restore_backend_locus (&loc);
+                 input_location = loc;
                }
              break;
 
@@ -5040,9 +5038,9 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
                  && sym->attr.result)
                {
                  gfc_start_block (&init);
-                 gfc_save_backend_locus (&loc);
-                 gfc_set_backend_locus (&sym->declared_at);
-                 tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
+                 loc = input_location;
+                 input_location = gfc_get_location (&sym->declared_at);
+                 tmp = gfc_null_and_pass_deferred_len (sym, &init, loc);
                  gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
                }
              break;
@@ -5067,8 +5065,8 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
            {
              tree descriptor = NULL_TREE;
 
-             gfc_save_backend_locus (&loc);
-             gfc_set_backend_locus (&sym->declared_at);
+             loc = input_location;
+             input_location = gfc_get_location (&sym->declared_at);
              gfc_start_block (&init);
 
              if (sym->ts.type == BT_CHARACTER
@@ -5133,10 +5131,10 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
                    && sym->ts.type == BT_CHARACTER
                    && sym->ts.deferred
                    && sym->ts.u.cl->passed_length)
-               tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
+               tmp = gfc_null_and_pass_deferred_len (sym, &init, loc);
              else
                {
-                 gfc_restore_backend_locus (&loc);
+                 input_location = loc;
                  tmp = NULL_TREE;
                }
 
@@ -5170,12 +5168,13 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
              if (sym->ts.type == BT_CLASS)
                {
                  /* Initialize _vptr to declared type.  */
-                 gfc_save_backend_locus (&loc);
-                 gfc_set_backend_locus (&sym->declared_at);
+                 loc = input_location;
+                 input_location = gfc_get_location (&sym->declared_at);
+
                  e = gfc_lval_expr_from_sym (sym);
                  gfc_reset_vptr (&init, e);
                  gfc_free_expr (e);
-                 gfc_restore_backend_locus (&loc);
+                 input_location = loc;
                }
 
              gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
@@ -5192,9 +5191,9 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
          if (sym->attr.dummy)
            {
              gfc_start_block (&init);
-             gfc_save_backend_locus (&loc);
-             gfc_set_backend_locus (&sym->declared_at);
-             tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
+             loc = input_location;
+             input_location = gfc_get_location (&sym->declared_at);
+             tmp = gfc_null_and_pass_deferred_len (sym, &init, loc);
              gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
            }
        }
@@ -5204,20 +5203,20 @@ gfc_trans_deferred_vars (gfc_symbol * proc_sym, 
gfc_wrapped_block * block)
        gfc_trans_deferred_array (sym, block);
       else if (sym->ts.type == BT_CHARACTER)
        {
-         gfc_save_backend_locus (&loc);
-         gfc_set_backend_locus (&sym->declared_at);
+         loc = input_location;
+         input_location = gfc_get_location (&sym->declared_at);
          if (sym->attr.dummy || sym->attr.result)
            gfc_trans_dummy_character (sym, sym->ts.u.cl, block);
          else
            gfc_trans_auto_character_variable (sym, block);
-         gfc_restore_backend_locus (&loc);
+         input_location = loc;
        }
       else if (sym->attr.assign)
        {
-         gfc_save_backend_locus (&loc);
-         gfc_set_backend_locus (&sym->declared_at);
+         loc = input_location;
+         input_location = gfc_get_location (&sym->declared_at);
          gfc_trans_assign_aux_var (sym, block);
-         gfc_restore_backend_locus (&loc);
+         input_location = loc;
        }
       else if (sym->ts.type == BT_DERIVED
                 && sym->value
@@ -5582,7 +5581,7 @@ gfc_trans_use_stmts (gfc_namespace * ns)
                          void_type_node);
          DECL_EXTERNAL (entry->namespace_decl) = 1;
        }
-      gfc_set_backend_locus (&use_stmt->where);
+      input_location = gfc_get_location (&use_stmt->where);
       if (!use_stmt->only_flag)
        (*debug_hooks->imported_module_or_decl) (entry->namespace_decl,
                                                 NULL_TREE,
@@ -5665,7 +5664,7 @@ gfc_trans_use_stmts (gfc_namespace * ns)
            local_name = get_identifier (rent->local_name);
          else
            local_name = NULL_TREE;
-         gfc_set_backend_locus (&rent->where);
+         input_location = gfc_get_location (&rent->where);
          (*debug_hooks->imported_module_or_decl) (decl, local_name,
                                                   ns->proc_name->backend_decl,
                                                   !use_stmt->only_flag,
@@ -6870,11 +6869,12 @@ finish_oacc_declare (gfc_namespace *ns, gfc_symbol 
*sym, bool block)
 {
   gfc_code *code;
   gfc_oacc_declare *oc;
-  locus where = gfc_current_locus;
+  locus where;
   gfc_omp_clauses *omp_clauses = NULL;
   gfc_omp_namelist *n, *p;
-
   module_oacc_clauses = NULL;
+
+  gfc_locus_from_location (&where, input_location);
   gfc_traverse_ns (ns, find_module_oacc_declare_clauses);
 
   if (module_oacc_clauses && sym->attr.flavor == FL_PROGRAM)
@@ -8209,9 +8209,9 @@ gfc_generate_block_data (gfc_namespace * ns)
 
   /* Tell the backend the source location of the block data.  */
   if (ns->proc_name)
-    gfc_set_backend_locus (&ns->proc_name->declared_at);
+    input_location = gfc_get_location (&ns->proc_name->declared_at);
   else
-    gfc_set_backend_locus (&gfc_current_locus);
+    input_location = gfc_get_location (&gfc_current_locus);
 
   /* Process the DATA statements.  */
   gfc_trans_common (ns);
diff --git a/gcc/fortran/trans-expr.cc b/gcc/fortran/trans-expr.cc
index 569b92a48ab4..735ab3a21e77 100644
--- a/gcc/fortran/trans-expr.cc
+++ b/gcc/fortran/trans-expr.cc
@@ -1641,8 +1641,7 @@ gfc_copy_class_to_class (tree from, tree to, tree nelems, 
bool unlimited)
              cond = fold_build2_loc (input_location, NE_EXPR,
                                      logical_type_node, from_len, to_len);
              gfc_trans_runtime_check (true, false, cond, &body,
-                                      &gfc_current_locus, msg,
-                                      to_len, from_len);
+                                      NULL, msg, to_len, from_len);
              free (msg);
            }
        }
@@ -10023,10 +10022,12 @@ gfc_conv_expr (gfc_se * se, gfc_expr * expr)
          && expr->must_finalize
          && gfc_may_be_finalized (expr->ts))
        {
-         gfc_warning (0, "The structure constructor at %C has been"
+         locus loc;
+         gfc_locus_from_location (&loc, input_location);
+         gfc_warning (0, "The structure constructor at %L has been"
                         " finalized. This feature was removed by f08/0011."
                         " Use -std=f2018 or -std=gnu to eliminate the"
-                        " finalization.");
+                        " finalization.", &loc);
          symbol_attribute attr;
          attr.allocatable = attr.pointer = 0;
          gfc_finalize_tree_expr (se, expr->ts.u.derived, attr, 0);
diff --git a/gcc/fortran/trans-io.cc b/gcc/fortran/trans-io.cc
index f3580ce42b5e..961a711c5301 100644
--- a/gcc/fortran/trans-io.cc
+++ b/gcc/fortran/trans-io.cc
@@ -1050,9 +1050,7 @@ io_result (stmtblock_t * block, tree var, gfc_st_label * 
err_label,
 static void
 set_error_locus (stmtblock_t * block, tree var, locus * where)
 {
-  gfc_file *f;
   tree str, locus_file;
-  int line;
   gfc_st_parameter_field *p = &st_parameter_field[IOPARM_common_filename];
 
   locus_file = fold_build3_loc (input_location, COMPONENT_REF,
@@ -1061,14 +1059,12 @@ set_error_locus (stmtblock_t * block, tree var, locus * 
where)
   locus_file = fold_build3_loc (input_location, COMPONENT_REF,
                                TREE_TYPE (p->field), locus_file,
                                p->field, NULL_TREE);
-  f = where->lb->file;
-  str = gfc_build_cstring_const (f->filename);
-
+  location_t loc = gfc_get_location (where);
+  str = gfc_build_cstring_const (LOCATION_FILE (loc));
   str = gfc_build_addr_expr (pchar_type_node, str);
   gfc_add_modify (block, locus_file, str);
 
-  line = LOCATION_LINE (where->lb->location);
-  set_parameter_const (block, var, IOPARM_common_line, line);
+  set_parameter_const (block, var, IOPARM_common_line, LOCATION_LINE (loc));
 }
 
 
diff --git a/gcc/fortran/trans-openmp.cc b/gcc/fortran/trans-openmp.cc
index f4c93148400d..153efd812334 100644
--- a/gcc/fortran/trans-openmp.cc
+++ b/gcc/fortran/trans-openmp.cc
@@ -8119,7 +8119,7 @@ gfc_trans_omp_workshare (gfc_code *code, gfc_omp_clauses 
*clauses)
          gfc_internal_error ("gfc_trans_omp_workshare(): Bad statement code");
        }
 
-      gfc_set_backend_locus (&code->loc);
+      input_location = gfc_get_location (&code->loc);
 
       if (res != NULL_TREE && ! IS_EMPTY_STMT (res))
        {
diff --git a/gcc/fortran/trans-stmt.cc b/gcc/fortran/trans-stmt.cc
index 86c549704751..81d9740b5655 100644
--- a/gcc/fortran/trans-stmt.cc
+++ b/gcc/fortran/trans-stmt.cc
@@ -1464,8 +1464,7 @@ gfc_trans_if_1 (gfc_code * code)
 {
   gfc_se if_se;
   tree stmt, elsestmt;
-  locus saved_loc;
-  location_t loc;
+  location_t loc, saved_loc = UNKNOWN_LOCATION;
 
   /* Check for an unconditional ELSE clause.  */
   if (!code->expr1)
@@ -1476,16 +1475,16 @@ gfc_trans_if_1 (gfc_code * code)
   gfc_start_block (&if_se.pre);
 
   /* Calculate the IF condition expression.  */
-  if (code->expr1->where.lb)
+  if (GFC_LOCUS_IS_SET (code->expr1->where))
     {
-      gfc_save_backend_locus (&saved_loc);
-      gfc_set_backend_locus (&code->expr1->where);
+      saved_loc = input_location;
+      input_location = gfc_get_location (&code->expr1->where);
     }
 
   gfc_conv_expr_val (&if_se, code->expr1);
 
-  if (code->expr1->where.lb)
-    gfc_restore_backend_locus (&saved_loc);
+  if (saved_loc != UNKNOWN_LOCATION)
+    input_location = saved_loc;
 
   /* Translate the THEN clause.  */
   stmt = gfc_trans_code (code->next);
@@ -1497,8 +1496,8 @@ gfc_trans_if_1 (gfc_code * code)
     elsestmt = build_empty_stmt (input_location);
 
   /* Build the condition expression and add it to the condition block.  */
-  loc = code->expr1->where.lb ? gfc_get_location (&code->expr1->where)
-                             : input_location;
+  loc = (GFC_LOCUS_IS_SET (code->expr1->where)
+        ? gfc_get_location (&code->expr1->where) : input_location);
   stmt = fold_build3_loc (loc, COND_EXPR, void_type_node, if_se.expr, stmt,
                          elsestmt);
 
diff --git a/gcc/fortran/trans-types.cc b/gcc/fortran/trans-types.cc
index d59c0cc19d4f..e596a362c023 100644
--- a/gcc/fortran/trans-types.cc
+++ b/gcc/fortran/trans-types.cc
@@ -2736,10 +2736,10 @@ gfc_get_union_type (gfc_symbol *un)
         /* The map field's declaration. */
         map_field = gfc_add_field_to_struct(typenode, 
get_identifier(map->name),
                                             map_type, &chain);
-        if (map->loc.lb)
-          gfc_set_decl_location (map_field, &map->loc);
-        else if (un->declared_at.lb)
-          gfc_set_decl_location (map_field, &un->declared_at);
+       if (GFC_LOCUS_IS_SET (map->loc))
+         gfc_set_decl_location (map_field, &map->loc);
+       else if (GFC_LOCUS_IS_SET (un->declared_at))
+         gfc_set_decl_location (map_field, &un->declared_at);
 
         DECL_PACKED (map_field) |= TYPE_PACKED (typenode);
         DECL_NAMELESS(map_field) = true;
@@ -3115,9 +3115,9 @@ gfc_get_derived_type (gfc_symbol * derived, int codimen)
       field = gfc_add_field_to_struct (typenode,
                                       get_identifier (c->name),
                                       field_type, &chain);
-      if (c->loc.lb)
+      if (GFC_LOCUS_IS_SET (c->loc))
        gfc_set_decl_location (field, &c->loc);
-      else if (derived->declared_at.lb)
+      else if (GFC_LOCUS_IS_SET (derived->declared_at))
        gfc_set_decl_location (field, &derived->declared_at);
 
       gfc_finish_decl_attrs (field, &c->attr);
diff --git a/gcc/fortran/trans.cc b/gcc/fortran/trans.cc
index 2c5133a8e05e..7182fa055985 100644
--- a/gcc/fortran/trans.cc
+++ b/gcc/fortran/trans.cc
@@ -42,8 +42,6 @@ along with GCC; see the file COPYING3.  If not see
 
    gfc_get_*   get a backend tree representation of a decl or type  */
 
-static gfc_file *gfc_current_backend_file;
-
 const char gfc_msg_fault[] = N_("Array reference out of bounds");
 
 
@@ -60,6 +58,14 @@ gfc_advance_chain (tree t, int n)
   return t;
 }
 
+void
+gfc_locus_from_location (locus *where, location_t loc)
+{
+  where->nextc = (gfc_char_t *) -1;
+  where->u.location = loc;
+}
+
+
 static int num_var;
 
 #define MAX_PREFIX_LEN 20
@@ -568,7 +574,7 @@ trans_runtime_error_vararg (tree errorfunc, locus* where, 
const char* msgid,
   tree fntype;
   char *message;
   const char *p;
-  int line, nargs, i;
+  int nargs, i;
   location_t loc;
 
   /* Compute the number of extra arguments from the format string.  */
@@ -585,13 +591,13 @@ trans_runtime_error_vararg (tree errorfunc, locus* where, 
const char* msgid,
 
   if (where)
     {
-      line = LOCATION_LINE (where->lb->location);
-      message = xasprintf ("At line %d of file %s",  line,
-                          where->lb->file->filename);
+      location_t loc = gfc_get_location (where);
+      message = xasprintf ("At line %d of file %s",  LOCATION_LINE (loc),
+                          LOCATION_FILE (loc));
     }
   else
     message = xasprintf ("In file '%s', around line %d",
-                        gfc_source_file, LOCATION_LINE (input_location) + 1);
+                        gfc_source_file, LOCATION_LINE (input_location));
 
   arg = gfc_build_addr_expr (pchar_type_node,
                             gfc_build_localized_cstring_const (message));
@@ -692,14 +698,13 @@ gfc_trans_runtime_check (bool error, bool once, tree 
cond, stmtblock_t * pblock,
     }
   else
     {
+      location_t loc = where ? gfc_get_location (where) : input_location;
       if (once)
-       cond = fold_build2_loc (gfc_get_location (where), TRUTH_AND_EXPR,
-                               boolean_type_node, tmpvar,
+       cond = fold_build2_loc (loc, TRUTH_AND_EXPR, boolean_type_node, tmpvar,
                                fold_convert (boolean_type_node, cond));
 
-      tmp = fold_build3_loc (gfc_get_location (where), COND_EXPR, 
void_type_node,
-                            cond, body,
-                            build_empty_stmt (gfc_get_location (where)));
+      tmp = fold_build3_loc (loc, COND_EXPR, void_type_node, cond, body,
+                            build_empty_stmt (loc));
       gfc_add_expr_to_block (pblock, tmp);
     }
 }
@@ -2278,42 +2283,6 @@ gfc_add_block_to_block (stmtblock_t * block, stmtblock_t 
* append)
 }
 
 
-/* Save the current locus.  The structure may not be complete, and should
-   only be used with gfc_restore_backend_locus.  */
-
-void
-gfc_save_backend_locus (locus * loc)
-{
-  loc->lb = XCNEW (gfc_linebuf);
-  loc->lb->location = input_location;
-  loc->lb->file = gfc_current_backend_file;
-}
-
-
-/* Set the current locus.  */
-
-void
-gfc_set_backend_locus (locus * loc)
-{
-  gfc_current_backend_file = loc->lb->file;
-  input_location = gfc_get_location (loc);
-}
-
-
-/* Restore the saved locus. Only used in conjunction with
-   gfc_save_backend_locus, to free the memory when we are done.  */
-
-void
-gfc_restore_backend_locus (locus * loc)
-{
-  /* This only restores the information captured by gfc_save_backend_locus,
-     intentionally does not use gfc_get_location.  */
-  input_location = loc->lb->location;
-  gfc_current_backend_file = loc->lb->file;
-  free (loc->lb);
-}
-
-
 /* Translate an executable statement. The tree cond is used by gfc_trans_do.
    This static function is wrapped by gfc_trans_code_cond and
    gfc_trans_code.  */
@@ -2339,8 +2308,7 @@ trans_code (gfc_code * code, tree cond)
          gfc_add_expr_to_block (&block, res);
        }
 
-      gfc_current_locus = code->loc;
-      gfc_set_backend_locus (&code->loc);
+      input_location = gfc_get_location (&code->loc);
 
       switch (code->op)
        {
@@ -2678,7 +2646,7 @@ trans_code (gfc_code * code, tree cond)
          gfc_internal_error ("gfc_trans_code(): Bad statement code");
        }
 
-      gfc_set_backend_locus (&code->loc);
+      input_location = gfc_get_location (&code->loc);
 
       if (res != NULL_TREE && ! IS_EMPTY_STMT (res))
        {
diff --git a/gcc/fortran/trans.h b/gcc/fortran/trans.h
index ed0a6f06a80b..4679ea0d6e1c 100644
--- a/gcc/fortran/trans.h
+++ b/gcc/fortran/trans.h
@@ -720,10 +720,7 @@ struct GTY((for_user)) module_htab_entry {
 struct module_htab_entry *gfc_find_module (const char *);
 void gfc_module_add_decl (struct module_htab_entry *, tree);
 
-/* Get and set the current location.  */
-void gfc_save_backend_locus (locus *);
-void gfc_set_backend_locus (locus *);
-void gfc_restore_backend_locus (locus *);
+void gfc_locus_from_location (locus *, location_t);
 
 /* Handle static constructor functions.  */
 extern GTY(()) tree gfc_static_ctors;
diff --git a/gcc/testsuite/gfortran.dg/bounds_check_25.f90 
b/gcc/testsuite/gfortran.dg/bounds_check_25.f90
index cc2247597f9b..c55a10217b39 100644
--- a/gcc/testsuite/gfortran.dg/bounds_check_25.f90
+++ b/gcc/testsuite/gfortran.dg/bounds_check_25.f90
@@ -25,8 +25,8 @@ contains
   end subroutine bla
 end
 
-! { dg-final { scan-tree-dump-times "line 15 .* bound mismatch for dimension 1 
of array .'.*.'" 1 "original" } }
-! { dg-final { scan-tree-dump-times "line 15 .* bound mismatch for dimension 2 
of array .'.*.'" 1 "original" } }
+! { dg-final { scan-tree-dump-times "around line 15.* bound mismatch for 
dimension 1 of array .'.*.'" 1 "original" } }
+! { dg-final { scan-tree-dump-times "around line 15.* bound mismatch for 
dimension 2 of array .'.*.'" 1 "original" } }
 
-! { dg-final { scan-tree-dump-times "line 24 .* bound mismatch for dimension 1 
of array .'d%%m.'" 1 "original" } }
-! { dg-final { scan-tree-dump-times "line 24 .* bound mismatch for dimension 2 
of array .'d%%m.'" 1 "original" } }
+! { dg-final { scan-tree-dump-times "At line 24 .* bound mismatch for 
dimension 1 of array .'d%%m.'" 1 "original" } }
+! { dg-final { scan-tree-dump-times "At line 24 .* bound mismatch for 
dimension 2 of array .'d%%m.'" 1 "original" } }
diff --git a/gcc/testsuite/gfortran.dg/goacc/pr92793-1.f90 
b/gcc/testsuite/gfortran.dg/goacc/pr92793-1.f90
index 422131ba4734..7a33d7ff00e8 100644
--- a/gcc/testsuite/gfortran.dg/goacc/pr92793-1.f90
+++ b/gcc/testsuite/gfortran.dg/goacc/pr92793-1.f90
@@ -21,8 +21,8 @@ subroutine check ()
       !$acc  &   & ! { dg-final { scan-tree-dump-times 
"pr92793-1\\\.f90:26:22\\\] #pragma acc loop" 1 "original" } }
      !$acc &     & ! { dg-final { scan-tree-dump-times 
"pr92793-1\\\.f90:26:22\\\] #pragma acc loop" 1 "gimple" } }
     !$acc&       reduction  ( +    : sum ) & ! { dg-line sum1 }
- !$acc && ! Fortran location information points to the ':' in 
'reduction(+:sum)'.
-   !$acc   &    &  ! { dg-message "36: location of the previous reduction for 
'sum'" "" { target *-*-* } sum1 }
+ !$acc && ! Fortran location information points to the 's' in 
'reduction(+:sum)'.
+   !$acc   &    &  ! { dg-message "38: location of the previous reduction for 
'sum'" "" { target *-*-* } sum1 }
 !$acc&     independent
   do i = 1, 10
       !$acc loop &
@@ -32,7 +32,7 @@ subroutine check ()
   !$acc & reduction(-: diff     ) &
              !$acc&reduction(- :    sum) & ! { dg-line sum2 }
             !$acc & & ! Fortran location information points to the ':' in 
'reduction(-:sum)'.
-          !$acc& & ! { dg-warning "32: conflicting reduction operations for 
'sum'" "" { target *-*-* } sum2 }
+          !$acc& & ! { dg-warning "37: conflicting reduction operations for 
'sum'" "" { target *-*-* } sum2 }
           !$acc       &independent
      do j = 1, 10
            sum &
@@ -107,7 +107,7 @@ subroutine gwv_s_l ()
 !$acc end serial
 end subroutine gwv_s_l
 
-subroutine gwv_r () ! { dg-message "16: enclosing routine" }
+subroutine gwv_r () ! { dg-message "1: enclosing routine" }
   implicit none (type, external)
   integer :: i, j, k
 
diff --git a/gcc/testsuite/gfortran.dg/gomp/allocate-14.f90 
b/gcc/testsuite/gfortran.dg/gomp/allocate-14.f90
index 4fed19249a3d..4db950f90a71 100644
--- a/gcc/testsuite/gfortran.dg/gomp/allocate-14.f90
+++ b/gcc/testsuite/gfortran.dg/gomp/allocate-14.f90
@@ -32,10 +32,10 @@ subroutine coarrays(x)
 
   !$omp allocate(x)  ! { dg-error "Unexpected dummy argument 'x' as argument 
at .1. to declarative !.OMP ALLOCATE" }
 
-  !$omp allocators allocate(y) ! { dg-error "28:Unexpected coarray 'y' in 
'allocate' at .1." }
+  !$omp allocators allocate(y) ! { dg-error "29:Unexpected coarray 'y' in 
'allocate' at .1." }
     allocate(y[*])
 
-  !$omp allocate(z) ! { dg-error "17:Unexpected coarray 'z' in 'allocate' at 
.1." }
+  !$omp allocate(z) ! { dg-error "18:Unexpected coarray 'z' in 'allocate' at 
.1." }
     allocate(z(5)[*])
   x = 5
 end 
diff --git a/gcc/testsuite/gfortran.dg/gomp/polymorphic-mapping.f90 
b/gcc/testsuite/gfortran.dg/gomp/polymorphic-mapping.f90
index dc3eb9e9c712..dd7eb3158df8 100644
--- a/gcc/testsuite/gfortran.dg/gomp/polymorphic-mapping.f90
+++ b/gcc/testsuite/gfortran.dg/gomp/polymorphic-mapping.f90
@@ -11,17 +11,17 @@ pa => ca
 !        11111111112222222222333333333344
 !2345678901234567890123456789012345678901
 !$omp target enter data map(c, ca, p, pa)
-! { dg-warning "28:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-1 }
-! { dg-warning "30:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-2 }
-! { dg-warning "34:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-3 }
-! { dg-warning "37:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-4 }
+! { dg-warning "29:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-1 }
+! { dg-warning "32:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-2 }
+! { dg-warning "36:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-3 }
+! { dg-warning "39:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-4 }
 
 !        11111111112222222222333333333344
 !2345678901234567890123456789012345678901
-!$omp target firstprivate(ca)  ! { dg-warning "26:FIRSTPRIVATE with 
polymorphic list item at .1. is unspecified behavior \\\[-Wopenmp\\\]" }
+!$omp target firstprivate(ca)  ! { dg-warning "27:FIRSTPRIVATE with 
polymorphic list item at .1. is unspecified behavior \\\[-Wopenmp\\\]" }
 !$omp end target
 
-!$omp target parallel do firstprivate(ca)  ! { dg-warning "38:FIRSTPRIVATE 
with polymorphic list item at .1. is unspecified behavior \\\[-Wopenmp\\\]" }
+!$omp target parallel do firstprivate(ca)  ! { dg-warning "39:FIRSTPRIVATE 
with polymorphic list item at .1. is unspecified behavior \\\[-Wopenmp\\\]" }
 do x = 0, 5
 end do
 
@@ -36,14 +36,14 @@ end block
 !        11111111112222222222333333333344
 !2345678901234567890123456789012345678901
 !$omp target update from(c,ca), to(p,pa)
-! { dg-warning "25:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-1 }
-! { dg-warning "27:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-2 }
-! { dg-warning "35:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-3 }
-! { dg-warning "37:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-4 }
+! { dg-warning "26:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-1 }
+! { dg-warning "28:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-2 }
+! { dg-warning "36:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-3 }
+! { dg-warning "38:Mapping polymorphic list item at .1. is unspecified 
behavior \\\[-Wopenmp\\\]" "" { target *-*-* } .-4 }
 
 ! -------------------------
 
-!$omp target parallel map(release: x) ! { dg-error "35:TARGET with map-type 
other than TO, FROM, TOFROM, or ALLOC on MAP clause" }
+!$omp target parallel map(release: x) ! { dg-error "36:TARGET with map-type 
other than TO, FROM, TOFROM, or ALLOC on MAP clause" }
 
 block
 end block
diff --git a/gcc/testsuite/gfortran.dg/gomp/reduction5.f90 
b/gcc/testsuite/gfortran.dg/gomp/reduction5.f90
index 85491f0b643c..b4b1c4685893 100644
--- a/gcc/testsuite/gfortran.dg/gomp/reduction5.f90
+++ b/gcc/testsuite/gfortran.dg/gomp/reduction5.f90
@@ -21,13 +21,13 @@ end do
 !$omp end task  ! { dg-error "Unexpected !.OMP END TASK statement" }
 
 !$omp taskloop reduction(inscan,+:a) in_reduction(+:b) ! { dg-error "'inscan' 
REDUCTION clause on construct other than DO, SIMD, DO SIMD, PARALLEL DO, 
PARALLEL DO SIMD" }
-  ! { dg-error "34: With INSCAN at .1., expected loop body with ..OMP SCAN 
between two structured block sequences" "" { target *-*-* } .-1 }
+  ! { dg-error "35: With INSCAN at .1., expected loop body with ..OMP SCAN 
between two structured block sequences" "" { target *-*-* } .-1 }
   ! { dg-error "'inscan' and non-'inscan' 'reduction' clauses on the same 
construct" "" { target *-*-* } .-2 }
 do i=1,10
   a = a + 1
 end do
 
-!$omp taskloop reduction(task,+:a) in_reduction(+:b) ! { dg-error "32: Only 
DEFAULT permitted as reduction-modifier in REDUCTION clause" }
+!$omp taskloop reduction(task,+:a) in_reduction(+:b) ! { dg-error "33: Only 
DEFAULT permitted as reduction-modifier in REDUCTION clause" }
 do i=1,10
   a = a + 1
 end do
@@ -36,7 +36,7 @@ end do
   a = a + 1
 !$omp end teams
 
-!$omp teams reduction(task, +:b) ! { dg-error "30: Only DEFAULT permitted as 
reduction-modifier in REDUCTION clause" }
+!$omp teams reduction(task, +:b) ! { dg-error "31: Only DEFAULT permitted as 
reduction-modifier in REDUCTION clause" }
   a = a + 1
 !$omp end teams
 
diff --git a/gcc/testsuite/gfortran.dg/gomp/reduction6.f90 
b/gcc/testsuite/gfortran.dg/gomp/reduction6.f90
index 321f096e02bd..f6d95af0833c 100644
--- a/gcc/testsuite/gfortran.dg/gomp/reduction6.f90
+++ b/gcc/testsuite/gfortran.dg/gomp/reduction6.f90
@@ -4,13 +4,13 @@ implicit none
 integer :: a, b, i
 a = 0
 
-!$omp simd reduction(inscan,+:a)  ! { dg-error "30: With INSCAN at .1., 
expected loop body with ..OMP SCAN between two structured block sequences" }
+!$omp simd reduction(inscan,+:a)  ! { dg-error "31: With INSCAN at .1., 
expected loop body with ..OMP SCAN between two structured block sequences" }
 do i=1,10
   a = a + 1
 end do
 
 !$omp parallel
-!$omp do reduction(inscan,+:a)  ! { dg-error "28: With INSCAN at .1., expected 
loop body with ..OMP SCAN between two structured block sequences" }
+!$omp do reduction(inscan,+:a)  ! { dg-error "29: With INSCAN at .1., expected 
loop body with ..OMP SCAN between two structured block sequences" }
 do i=1,10
   a = a + 1
 end do

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