Merge from origin/emacs-26

9e59de9449 Use GCALIGNED properly for GCC
b9d7c90260 In f90.el, set fill-paragraph-function to a useful value

# Conflicts:
#	src/lisp.h

5 files changed, 30 insertions, 10 deletions

diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index 0ea3f7b6b6a..ff84df94a69 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -668,7 +668,7 @@ close_emacs_globals (ptrdiff_t num_symbols)
            "extern\n"
            "#endif\n"
            "struct {\n"
-           "  struct Lisp_Symbol GCALIGNED s;\n"
+           "  struct GCALIGNED Lisp_Symbol s;\n"
            "} lispsym[%td];\n"),
           num_symbols);
 }
diff --git a/lisp/progmodes/f90.el b/lisp/progmodes/f90.el
index 72156288eba..0cd665ca24b 100644
--- a/lisp/progmodes/f90.el
+++ b/lisp/progmodes/f90.el
@@ -133,7 +133,7 @@
 ;;   f90-indent-region    (can be called by calling indent-region)
 ;;   f90-indent-subprogram
 ;;   f90-break-line                 f90-join-lines
-;;   f90-fill-region
+;;   f90-fill-region                f90-fill-paragraph
 ;;   f90-insert-end
 ;;   f90-upcase-keywords            f90-upcase-region-keywords
 ;;   f90-downcase-keywords          f90-downcase-region-keywords
@@ -784,6 +784,7 @@ Can be overridden by the value of `font-lock-maximum-decoration'.")
         ["Indent Region" f90-indent-region :active mark-active]
         ["Fill Region" f90-fill-region :active mark-active
          :help "Fill long lines in the region"]
+        ["Fill Statement/Comment" fill-paragraph :active t]
         "--"
         ["Break Line at Point" f90-break-line :active t
          :help "Break the current line at point"]
@@ -1185,6 +1186,7 @@ with no args, if that value is non-nil."
   (set (make-local-variable 'abbrev-all-caps) t)
   (set (make-local-variable 'normal-auto-fill-function) 'f90-do-auto-fill)
   (setq indent-tabs-mode nil)           ; auto buffer local
+  (set (make-local-variable 'fill-paragraph-function) 'f90-fill-paragraph)
   (set (make-local-variable 'font-lock-defaults)
        '((f90-font-lock-keywords f90-font-lock-keywords-1
                                  f90-font-lock-keywords-2
@@ -2158,6 +2160,20 @@ Like `join-line', but handles F90 syntax."
     (if (featurep 'xemacs)
         (zmacs-deactivate-region)
       (deactivate-mark))))
+
+(defun f90-fill-paragraph (&optional justify)
+  "In a comment, fill it as a paragraph, else fill the current statement.
+For use as the value of `fill-paragraph-function'.
+Passes optional argument JUSTIFY to `fill-comment-paragraph'.
+Always returns non-nil (to prevent `fill-paragraph' being called)."
+  (interactive "*P")
+  (or (fill-comment-paragraph justify)
+      (save-excursion
+        (f90-next-statement)
+        (let ((end (if (bobp) (point) (1- (point)))))
+          (f90-previous-statement)
+          (f90-fill-region (point) end)))
+      t))
 
 (defconst f90-end-block-optional-name
   '("program" "module" "subroutine" "function" "type")
diff --git a/src/buffer.c b/src/buffer.c
index 15735a298ad..edeed55e8be 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -61,7 +61,7 @@ struct buffer *all_buffers;
    Setting the default value also goes through the alist of buffers
    and stores into each buffer that does not say it has a local value.  */
 
-struct buffer GCALIGNED buffer_defaults;
+struct GCALIGNED buffer buffer_defaults;
 
 /* This structure marks which slots in a buffer have corresponding
    default values in buffer_defaults.
@@ -84,7 +84,7 @@ struct buffer buffer_local_flags;
 /* This structure holds the names of symbols whose values may be
    buffer-local.  It is indexed and accessed in the same way as the above.  */
 
-struct buffer GCALIGNED buffer_local_symbols;
+struct GCALIGNED buffer buffer_local_symbols;
 
 /* Return the symbol of the per-buffer variable at offset OFFSET in
    the buffer structure.  */
diff --git a/src/lisp.h b/src/lisp.h
index 1ce32f33420..e3262ad40f3 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -277,10 +277,14 @@ DEFINE_GDB_SYMBOL_END (VALMASK)
 error !;
 #endif
 
-/* Declare an object to have an address that is a multiple of
-   GCALIGNMENT.  This is a no-op if the object's natural alignment is
-   already a multiple of GCALIGNMENT.  alignas is not suitable here,
-   as it fails if the object's natural alignment exceeds GCALIGNMENT.  */
+/* Use GCALIGNED immediately after the 'struct' keyword to require the
+   struct to have an address that is a multiple of GCALIGNMENT.  This
+   is a no-op if the struct's natural alignment is already a multiple
+   of GCALIGNMENT.  GCALIGNED's implementation uses the 'aligned'
+   attribute instead of 'alignas (GCALIGNMENT)', as the latter would
+   fail if an object's natural alignment exceeds GCALIGNMENT.  The
+   implementation hopes that natural alignment suffices on platforms
+   lacking 'aligned'.  */
 #ifdef HAVE_STRUCT_ATTRIBUTE_ALIGNED
 # define GCALIGNED __attribute__ ((aligned (GCALIGNMENT)))
 #else
@@ -2941,7 +2945,7 @@ CHECK_NUMBER_CDR (Lisp_Object x)
 /* This version of DEFUN declares a function prototype with the right
    arguments, so we can catch errors with maxargs at compile-time.  */
 #define DEFUN(lname, fnname, sname, minargs, maxargs, intspec, doc)     \
-   static struct Lisp_Subr GCALIGNED sname =                            \
+   static struct GCALIGNED Lisp_Subr sname =                            \
      { { PVEC_SUBR << PSEUDOVECTOR_AREA_BITS },                         \
        { .a ## maxargs = fnname },                                      \
        minargs, maxargs, lname, intspec, 0};                            \
diff --git a/src/thread.c b/src/thread.c
index 03f5b31855e..7335833cf94 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -26,7 +26,7 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #include "coding.h"
 #include "syssignal.h"
 
-static struct thread_state GCALIGNED main_thread;
+static struct GCALIGNED thread_state main_thread;
 
 struct thread_state *current_thread = &main_thread;