Copyright (C) 1987, 1991, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "config.h"
#include "flags.h"
#include "function.h"
#include "expr.h"
+#include "optabs.h"
#include "hard-reg-set.h"
#include "insn-config.h"
#include "recog.h"
-#if !defined PREFERRED_STACK_BOUNDARY && defined STACK_BOUNDARY
-#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
-#endif
-
static rtx break_out_memory_refs PARAMS ((rtx));
static void emit_stack_probe PARAMS ((rtx));
here, because, in C and C++, the fact that a location is accessed
through a const expression does not mean that the value there can
never change. */
+
+ /* If we have already set DECL_RTL = ref, get_alias_set will get the
+ wrong answer, as it assumes that DECL_RTL already has the right alias
+ info. Callers should not set DECL_RTL until after the call to
+ set_mem_attributes. */
+ if (DECL_P (t) && ref == DECL_RTL_IF_SET (t))
+ abort ();
+
set_mem_alias_set (ref, get_alias_set (t));
+
MEM_VOLATILE_P (ref) = TYPE_VOLATILE (type);
MEM_IN_STRUCT_P (ref) = AGGREGATE_TYPE_P (type);
round_push (size)
rtx size;
{
-#ifdef PREFERRED_STACK_BOUNDARY
int align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT;
if (align == 1)
return size;
NULL_RTX, 1);
size = expand_mult (Pmode, size, GEN_INT (align), NULL_RTX, 1);
}
-#endif /* PREFERRED_STACK_BOUNDARY */
return size;
}
\f
/* We can't attempt to minimize alignment necessary, because we don't
know the final value of preferred_stack_boundary yet while executing
this code. */
-#ifdef PREFERRED_STACK_BOUNDARY
cfun->preferred_stack_boundary = PREFERRED_STACK_BOUNDARY;
-#endif
/* We will need to ensure that the address we return is aligned to
BIGGEST_ALIGNMENT. If STACK_DYNAMIC_OFFSET is defined, we don't
If we have to align, we must leave space in SIZE for the hole
that might result from the alignment operation. */
-#if defined (STACK_DYNAMIC_OFFSET) || defined (STACK_POINTER_OFFSET) || ! defined (PREFERRED_STACK_BOUNDARY)
+#if defined (STACK_DYNAMIC_OFFSET) || defined (STACK_POINTER_OFFSET)
#define MUST_ALIGN 1
#else
#define MUST_ALIGN (PREFERRED_STACK_BOUNDARY < BIGGEST_ALIGNMENT)
/* See optimize_save_area_alloca to understand what is being
set up here. */
-#if !defined(PREFERRED_STACK_BOUNDARY) || !defined(MUST_ALIGN) || (PREFERRED_STACK_BOUNDARY != BIGGEST_ALIGNMENT)
- /* If anyone creates a target with these characteristics, let them
- know that our optimization cannot work correctly in such a case. */
- abort ();
-#endif
+ /* ??? Code below assumes that the save area needs maximal
+ alignment. This constraint may be too strong. */
+ if (PREFERRED_STACK_BOUNDARY != BIGGEST_ALIGNMENT)
+ abort ();
if (GET_CODE (size) == CONST_INT)
{
way of knowing which systems have this problem. So we avoid even
momentarily mis-aligning the stack. */
-#ifdef PREFERRED_STACK_BOUNDARY
/* If we added a variable amount to SIZE,
we can no longer assume it is aligned. */
#if !defined (SETJMP_VIA_SAVE_AREA)
if (MUST_ALIGN || known_align % PREFERRED_STACK_BOUNDARY != 0)
#endif
size = round_push (size);
-#endif
do_pending_stack_adjust ();
/* We ought to be called always on the toplevel and stack ought to be aligned
propertly. */
-#ifdef PREFERRED_STACK_BOUNDARY
if (stack_pointer_delta % (PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT))
abort ();
-#endif
/* If needed, check that we have the required amount of stack. Take into
account what has already been checked. */
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