Keep stack-allocated Lisp objects fast rather than versatile.

* configure.ac (HAVE_STATEMENT_EXPRESSIONS): Remove.
For USE_STACK_LISP_OBJECTS, we always assume __GNUC__.
* lisp.h (union Aligned_Cons) [!GCALIGNED]: Define as such.
(SCOPED_CONS_INITIALIZER): New macro.
(scoped_cons) [USE_STACK_LISP_OBJECTS]: Use it.
(USE_LOCAL_ALLOCA): Remove.
(local_cons, local_list1, local_list2, local_list3, local_list4):
Remove.  Stack overflow checking makes them too slow.
(make_local_vector): Likewise.  Also we just don't have enough
users for it.
(enum LISP_STRING_OVERHEAD): Remove.
(local_string_init, local_vector_init): Remove prototypes.
(make_local_string, build_local_string): Redesign to target short
compile-time string constants, fall back to regular string allocation
where appropriate.
(lisp_string_size): New function.
(verify_ascii) [ENABLE_CHECKING]: Add prototype.
* alloc.c (local_string_init, local_vector_init): Remove.
(verify_ascii) [ENABLE_CHECKING]: New function.
* buffer.c, charset.c, chartab.c, data.c, editfns.c, emacs.c, fileio.c:
* fns.c, font.c, fontset.c, frame.c, keyboard.c, keymap.c, lread.c:
* menu.c, minibuf.c, process.c, textprop.c, xdisp.c, xfns.c, xfont.c:
* xselect.c, xterm.c: All related users changed.

1 files changed, 25 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 20f9abd3ebf..89fc763fc53 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,28 @@
+2014-09-29  Dmitry Antipov  <dmantipov@yandex.ru>
+
+        Keep stack-allocated Lisp objects fast rather than versatile.
+        * lisp.h (union Aligned_Cons) [!GCALIGNED]: Define as such.
+        (SCOPED_CONS_INITIALIZER): New macro.
+        (scoped_cons) [USE_STACK_LISP_OBJECTS]: Use it.
+        (USE_LOCAL_ALLOCA): Remove.
+        (local_cons, local_list1, local_list2, local_list3, local_list4):
+        Remove.  Stack overflow checking makes them too slow.
+        (make_local_vector): Likewise.  Also we just don't have enough
+        users for it.
+        (enum LISP_STRING_OVERHEAD): Remove.
+        (local_string_init, local_vector_init): Remove prototypes.
+        (make_local_string, build_local_string): Redesign to target short
+        compile-time string constants, fall back to regular string allocation
+        where appropriate.
+        (lisp_string_size): New function.
+        (verify_ascii) [ENABLE_CHECKING]: Add prototype.
+        * alloc.c (local_string_init, local_vector_init): Remove.
+        (verify_ascii) [ENABLE_CHECKING]: New function.
+        * buffer.c, charset.c, chartab.c, data.c, editfns.c, emacs.c, fileio.c:
+        * fns.c, font.c, fontset.c, frame.c, keyboard.c, keymap.c, lread.c:
+        * menu.c, minibuf.c, process.c, textprop.c, xdisp.c, xfns.c, xfont.c:
+        * xselect.c, xterm.c: All related users changed.
+
 2014-09-28  Ken Brown  <kbrown@cornell.edu>
 
         * sheap.c (bss_sbrk_buffer_beg): Remove redundant variable.