USE_LISP_UNION_TYPE + USE_LSB_TAG cleanup (Bug#11604)

[bpt/emacs.git] / src / ChangeLog

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+2012-06-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+       USE_LISP_UNION_TYPE + USE_LSB_TAG cleanup (Bug#11604)
+       * alloc.c (make_number) [!defined make_number]:
+       Remove, as lisp.h always defines this now.
+       (mark_maybe_pointer): Simplify since USE_LSB_TAG is always defined now.
+       (roundup_size): Verify that it is a power of 2.
+       * data.c (Fmake_variable_buffer_local, Fmake_local_variable):
+       * ftfont.c (ftfont_driver): Use LISP_INITIALLY_ZERO.
+       * lisp.h (USE_LSB_TAG): Allow the builder to compile with
+       -DUSE_LSB_TAG=0, to override the automatically-selected default.
+       USE_LSB_TAG now is always defined to be either 0 or 1.
+       All uses changed.
+       (union Lisp_Object): Don't worry about WORDS_BIGENDIAN; the
+       code works fine either way, and efficiency is not a concern here,
+       as the union type is for debugging, not for production.
+       (LISP_MAKE_RVALUE, make_number) [USE_LISP_UNION_TYPE]:
+       Use an inline function on all platforms when using the union type,
+       since this is simpler and 'static inline' can be used portably
+       within Emacs now.
+       (LISP_INITIALLY_ZERO): New macro.
+       (XFASTINT, XSETFASTINT) [USE_LISP_UNION_TYPE]: Remove.
+       (XSET) [USE_LISP_UNION_TYPE]: Don't overparenthesize.
+
 2012-06-12  Glenn Morris  <rgm@gnu.org>
 
        * s/gnu-kfreebsd.h, s/hpux11.h, s/openbsd.h, s/sol2-10.h: Remove files.