Assume GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS

This removes the need for GCPRO1 etc.  Suggested by Stefan Monnier in:
http://lists.gnu.org/archive/html/emacs-devel/2015-08/msg00918.html
* doc/lispref/internals.texi (Writing Emacs Primitives):
* etc/NEWS:
Document the change.
* src/alloc.c (gcprolist, dump_zombies, MAX_ZOMBIES, zombies)
(nzombies, ngcs, avg_zombies, max_live, max_zombies, avg_live)
(Fgc_status, check_gcpros, relocatable_string_data_p, gc-precise):
* src/bytecode.c (mark_byte_stack) [BYTE_MARK_STACK]:
* src/eval.c (gcpro_level) [DEBUG_GCPRO]:
* src/lisp.h (struct handler.gcpro, struct gcpro, GC_MARK_STACK)
(GC_USE_GCPROS_AS_BEFORE, GC_MAKE_GCPROS_NOOPS)
(GC_MARK_STACK_CHECK_GCPROS, GC_USE_GCPROS_CHECK_ZOMBIES)
(BYTE_MARK_STACK, GCPRO1, GCPRO2, GCPRO3, GCPRO4, GCPRO5, GCPRO6)
(GCPRO7, UNGCPRO, RETURN_UNGCPRO):
Remove.  All uses removed.  The code now assumes
GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
* src/bytecode.c (relocate_byte_stack):
Rename from unmark_byte_stack, since it now only relocates.
All callers changed.
* src/frame.c (make_frame): Add an IF_LINT to pacify GCC 5.2
with GCPROs removed.
* src/systime.h: Use EMACS_LISP_H as the canary instead of GCPRO1.
* test/automated/finalizer-tests.el (finalizer-basic)
(finalizer-circular-reference, finalizer-cross-reference)
(finalizer-error):
* test/automated/generator-tests.el (cps-test-iter-close-finalizer):
Remove tests, as they depend on gc-precise.

1 files changed, 0 insertions, 4 deletions

diff --git a/src/w32proc.c b/src/w32proc.c
index 3aa80302b95..62d65313bb3 100644
--- a/src/w32proc.c
+++ b/src/w32proc.c
@@ -1748,13 +1748,9 @@ sys_spawnve (int mode, char *cmdname, char **argv, char **envp)
      absolute.  So we double-check this here, just in case.  */
   if (faccessat (AT_FDCWD, cmdname, X_OK, AT_EACCESS) != 0)
     {
-      struct gcpro gcpro1;
-
       program = build_string (cmdname);
       full = Qnil;
-      GCPRO1 (program);
       openp (Vexec_path, program, Vexec_suffixes, &full, make_number (X_OK), 0);
-      UNGCPRO;
       if (NILP (full))
         {
           errno = EINVAL;