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.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/data.c b/src/data.c
index defcd06a2e..4449977dbe 100644
--- a/src/data.c
+++ b/src/data.c
@@ -1500,7 +1500,7 @@ The function `default-value' gets the default value and `set-default' sets it.
 {
   struct Lisp_Symbol *sym;
   struct Lisp_Buffer_Local_Value *blv = NULL;
-  union Lisp_Val_Fwd valcontents IF_LINT (= {0});
+  union Lisp_Val_Fwd valcontents IF_LINT (= {LISP_INITIALLY_ZERO});
   int forwarded IF_LINT (= 0);
 
   CHECK_SYMBOL (variable);
@@ -1577,7 +1577,7 @@ Instead, use `add-hook' and specify t for the LOCAL argument.  */)
 {
   register Lisp_Object tem;
   int forwarded IF_LINT (= 0);
-  union Lisp_Val_Fwd valcontents IF_LINT (= {0});
+  union Lisp_Val_Fwd valcontents IF_LINT (= {LISP_INITIALLY_ZERO});
   struct Lisp_Symbol *sym;
   struct Lisp_Buffer_Local_Value *blv = NULL;