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Simplify by removing HAVE_STRUCT_ATTRIBUTE_ALIGNED

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* configure.ac (HAVE_STRUCT_ATTRIBUTE_ALIGNED): Remove.  No longer
needed, since we no longer rely on __attribute__ ((aligned (8))).
All uses removed.
* src/emacs-module.c (HAVE_STRUCT_ATTRIBUTE_ALIGNED): Remove.
(lisp_to_value): Simplify now that we no longer need to worry
whether HAVE_STRUCT_ATTRIBUTE_ALIGNED is false.
This commit is contained in:
Paul Eggert 2017-11-13 08:51:41 -08:00
parent b1573a97e1
commit d14956099d
3 changed files with 0 additions and 34 deletions
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1
admin/CPP-DEFINES
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@ -103,7 +103,6 @@ HAVE_ALARM
HAVE_ALLOCA
HAVE_ALLOCA_H
HAVE_ALSA
HAVE_ATTRIBUTE_ALIGNED
HAVE_BDFFONT
HAVE_BOXES
HAVE_C99_STRTOLD

16
configure.ac
View File

@ -5113,22 +5113,6 @@ else
fi
AC_SUBST(LIBXMENU)
AC_CACHE_CHECK([for struct alignment],
[emacs_cv_struct_alignment],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <stddef.h>
struct __attribute__ ((aligned (8))) s { char c; };
struct t { char c; struct s s; };
char verify[offsetof (struct t, s) == 8 ? 1 : -1];
]])],
[emacs_cv_struct_alignment=yes],
[emacs_cv_struct_alignment=no])])
if test "$emacs_cv_struct_alignment" = yes; then
AC_DEFINE([HAVE_STRUCT_ATTRIBUTE_ALIGNED], 1,
[Define to 1 if 'struct __attribute__ ((aligned (N)))' aligns the
structure to an N-byte boundary.])
fi
if test "${GNU_MALLOC}" = "yes" ; then
AC_DEFINE(GNU_MALLOC, 1,
[Define to 1 if you want to use the GNU memory allocator.])

17
src/emacs-module.c
View File

@ -998,10 +998,6 @@ lisp_to_value_bits (Lisp_Object o)
return (emacs_value) p;
}
#ifndef HAVE_STRUCT_ATTRIBUTE_ALIGNED
enum { HAVE_STRUCT_ATTRIBUTE_ALIGNED = 0 };
#endif
/* Convert O to an emacs_value. Allocate storage if needed; this can
signal if memory is exhausted. Must be an injective function. */
static emacs_value
@ -1029,19 +1025,6 @@ lisp_to_value (emacs_env *env, Lisp_Object o)
/* Package the incompressible object pointer inside a pair
that is compressible. */
Lisp_Object pair = Fcons (o, ltv_mark);
if (! HAVE_STRUCT_ATTRIBUTE_ALIGNED)
{
/* Keep calling Fcons until it returns a compressible pair.
This shouldn't take long. */
while ((intptr_t) XCONS (pair) & (GCALIGNMENT - 1))
pair = Fcons (o, pair);
/* Plant the mark. The garbage collector will eventually
reclaim any just-allocated incompressible pairs. */
XSETCDR (pair, ltv_mark);
}
v = (emacs_value) ((intptr_t) XCONS (pair) + Lisp_Cons);
}