/* Emit RTL for the GCC expander.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GCC.
You should have received a copy of the GNU General Public License
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* Middle-to-low level generation of rtx code and insns.
#include "ggc.h"
#include "debug.h"
#include "langhooks.h"
+#include "tree-pass.h"
/* Commonly used modes. */
rtx real = rtx_alloc (CONST_DOUBLE);
PUT_MODE (real, mode);
- memcpy (&CONST_DOUBLE_LOW (real), &value, sizeof (REAL_VALUE_TYPE));
+ real->u.rv = value;
return lookup_const_double (real);
}
return mem;
}
+/* Generate a MEM referring to fixed portions of the frame, e.g., register
+ save areas. */
+
+rtx
+gen_frame_mem (enum machine_mode mode, rtx addr)
+{
+ rtx mem = gen_rtx_MEM (mode, addr);
+ MEM_NOTRAP_P (mem) = 1;
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ return mem;
+}
+
+/* Generate a MEM referring to a temporary use of the stack, not part
+ of the fixed stack frame. For example, something which is pushed
+ by a target splitter. */
+rtx
+gen_tmp_stack_mem (enum machine_mode mode, rtx addr)
+{
+ rtx mem = gen_rtx_MEM (mode, addr);
+ MEM_NOTRAP_P (mem) = 1;
+ if (!current_function_calls_alloca)
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ return mem;
+}
+
/* We want to create (subreg:OMODE (obj:IMODE) OFFSET). Return true if
this construct would be valid, and false otherwise. */
void
set_decl_rtl (tree t, rtx x)
{
- DECL_CHECK (t)->decl.rtl = x;
+ DECL_WRTL_CHECK (t)->decl_with_rtl.rtl = x;
if (!x)
return;
/* Unfortunately, this routine doesn't take a parameter for the mode of X,
so we have to make one up. Yuk. */
innermode = GET_MODE (x);
- if (GET_CODE (x) == CONST_INT && msize <= HOST_BITS_PER_WIDE_INT)
+ if (GET_CODE (x) == CONST_INT
+ && msize * BITS_PER_UNIT <= HOST_BITS_PER_WIDE_INT)
innermode = mode_for_size (HOST_BITS_PER_WIDE_INT, MODE_INT, 0);
else if (innermode == VOIDmode)
innermode = mode_for_size (HOST_BITS_PER_WIDE_INT * 2, MODE_INT, 0);
return simplify_gen_subreg (word_mode, op, mode, (offset * UNITS_PER_WORD));
}
-/* Similar to `operand_subword', but never return 0. If we can't extract
- the required subword, put OP into a register and try again. If that fails,
- abort. We always validate the address in this case.
+/* Similar to `operand_subword', but never return 0. If we can't
+ extract the required subword, put OP into a register and try again.
+ The second attempt must succeed. We always validate the address in
+ this case.
MODE is the mode of OP, in case it is CONST_INT. */
return result;
}
\f
-/* Given a compare instruction, swap the operands.
- A test instruction is changed into a compare of 0 against the operand. */
-
-void
-reverse_comparison (rtx insn)
-{
- rtx body = PATTERN (insn);
- rtx comp;
-
- if (GET_CODE (body) == SET)
- comp = SET_SRC (body);
- else
- comp = SET_SRC (XVECEXP (body, 0, 0));
-
- if (GET_CODE (comp) == COMPARE)
- {
- rtx op0 = XEXP (comp, 0);
- rtx op1 = XEXP (comp, 1);
- XEXP (comp, 0) = op1;
- XEXP (comp, 1) = op0;
- }
- else
- {
- rtx new = gen_rtx_COMPARE (VOIDmode,
- CONST0_RTX (GET_MODE (comp)), comp);
- if (GET_CODE (body) == SET)
- SET_SRC (body) = new;
- else
- SET_SRC (XVECEXP (body, 0, 0)) = new;
- }
-}
-\f
/* Within a MEM_EXPR, we care about either (1) a component ref of a decl,
or (2) a component ref of something variable. Represent the later with
a NULL expression. */
MEM_VOLATILE_P (ref) |= TYPE_VOLATILE (type);
MEM_IN_STRUCT_P (ref) = AGGREGATE_TYPE_P (type);
MEM_POINTER (ref) = POINTER_TYPE_P (type);
- MEM_NOTRAP_P (ref) = TREE_THIS_NOTRAP (t);
/* If we are making an object of this type, or if this is a DECL, we know
that it is a scalar if the type is not an aggregate. */
the expression. */
if (! TYPE_P (t))
{
- tree base = get_base_address (t);
- if (base && DECL_P (base)
- && TREE_READONLY (base)
- && (TREE_STATIC (base) || DECL_EXTERNAL (base)))
- MEM_READONLY_P (ref) = 1;
+ tree base;
if (TREE_THIS_VOLATILE (t))
MEM_VOLATILE_P (ref) = 1;
|| TREE_CODE (t) == SAVE_EXPR)
t = TREE_OPERAND (t, 0);
- /* If this expression can't be addressed (e.g., it contains a reference
- to a non-addressable field), show we don't change its alias set. */
- if (! can_address_p (t))
+ /* We may look through structure-like accesses for the purposes of
+ examining TREE_THIS_NOTRAP, but not array-like accesses. */
+ base = t;
+ while (TREE_CODE (base) == COMPONENT_REF
+ || TREE_CODE (base) == REALPART_EXPR
+ || TREE_CODE (base) == IMAGPART_EXPR
+ || TREE_CODE (base) == BIT_FIELD_REF)
+ base = TREE_OPERAND (base, 0);
+
+ if (DECL_P (base))
+ {
+ if (CODE_CONTAINS_STRUCT (TREE_CODE (base), TS_DECL_WITH_VIS))
+ MEM_NOTRAP_P (ref) = !DECL_WEAK (base);
+ else
+ MEM_NOTRAP_P (ref) = 1;
+ }
+ else
+ MEM_NOTRAP_P (ref) = TREE_THIS_NOTRAP (base);
+
+ base = get_base_address (base);
+ if (base && DECL_P (base)
+ && TREE_READONLY (base)
+ && (TREE_STATIC (base) || DECL_EXTERNAL (base)))
+ {
+ tree base_type = TREE_TYPE (base);
+ gcc_assert (!(base_type && TYPE_NEEDS_CONSTRUCTING (base_type))
+ || DECL_ARTIFICIAL (base));
+ MEM_READONLY_P (ref) = 1;
+ }
+
+ /* If this expression uses it's parent's alias set, mark it such
+ that we won't change it. */
+ if (component_uses_parent_alias_set (t))
MEM_KEEP_ALIAS_SET_P (ref) = 1;
/* If this is a decl, set the attributes of the MEM from it. */
index, then convert to sizetype and multiply by the size of
the array element. */
if (! integer_zerop (low_bound))
- index = fold (build2 (MINUS_EXPR, TREE_TYPE (index),
- index, low_bound));
+ index = fold_build2 (MINUS_EXPR, TREE_TYPE (index),
+ index, low_bound);
off_tree = size_binop (PLUS_EXPR,
size_binop (MULT_EXPR, convert (sizetype,
unshare_all_rtl_1 (current_function_decl, get_insns ());
}
+struct tree_opt_pass pass_unshare_all_rtl =
+{
+ "unshare", /* name */
+ NULL, /* gate */
+ unshare_all_rtl, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func, /* todo_flags_finish */
+ 0 /* letter */
+};
+
+
/* Check that ORIG is not marked when it should not be and mark ORIG as in use,
Recursively does the same for subexpressions. */
#ifdef ENABLE_CHECKING
if (RTX_FLAG (x, used))
{
- error ("Invalid rtl sharing found in the insn");
+ error ("invalid rtl sharing found in the insn");
debug_rtx (insn);
- error ("Shared rtx");
+ error ("shared rtx");
debug_rtx (x);
- internal_error ("Internal consistency failure");
+ internal_error ("internal consistency failure");
}
#endif
gcc_assert (!RTX_FLAG (x, used));
rtx
get_first_nonnote_insn (void)
{
- rtx insn;
+ rtx insn = first_insn;
+
+ if (insn)
+ {
+ if (NOTE_P (insn))
+ for (insn = next_insn (insn);
+ insn && NOTE_P (insn);
+ insn = next_insn (insn))
+ continue;
+ else
+ {
+ if (NONJUMP_INSN_P (insn)
+ && GET_CODE (PATTERN (insn)) == SEQUENCE)
+ insn = XVECEXP (PATTERN (insn), 0, 0);
+ }
+ }
- for (insn = first_insn; insn && NOTE_P (insn); insn = next_insn (insn));
return insn;
}
rtx
get_last_nonnote_insn (void)
{
- rtx insn;
+ rtx insn = last_insn;
+
+ if (insn)
+ {
+ if (NOTE_P (insn))
+ for (insn = previous_insn (insn);
+ insn && NOTE_P (insn);
+ insn = previous_insn (insn))
+ continue;
+ else
+ {
+ if (NONJUMP_INSN_P (insn)
+ && GET_CODE (PATTERN (insn)) == SEQUENCE)
+ insn = XVECEXP (PATTERN (insn), 0,
+ XVECLEN (PATTERN (insn), 0) - 1);
+ }
+ }
- for (insn = last_insn; insn && NOTE_P (insn); insn = previous_insn (insn));
return insn;
}
case REG_NORETURN:
case REG_SETJMP:
- case REG_ALWAYS_RETURN:
insn = insn_last;
while (insn != NULL_RTX)
{
|| (GET_CODE (insn) == SET
&& SET_DEST (insn) == pc_rtx)))
{
- warning ("ICE: emit_insn used where emit_jump_insn needed:\n");
+ warning (0, "ICE: emit_insn used where emit_jump_insn needed:\n");
debug_rtx (insn);
}
#endif
if (INSN_P (insn))
bb->flags |= BB_DIRTY;
/* Should not happen as first in the BB is always either NOTE or
- LABEl. */
+ LABEL. */
gcc_assert (BB_HEAD (bb) != insn
/* Avoid clobbering of structure when creating new BB. */
|| BARRIER_P (insn)
gcc_assert (!eh_stack);
}
+struct tree_opt_pass pass_remove_unnecessary_notes =
+{
+ "eunotes", /* name */
+ NULL, /* gate */
+ remove_unnecessary_notes, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func, /* todo_flags_finish */
+ 0 /* letter */
+};
+
\f
/* Emit insn(s) of given code and pattern
at a specified place within the doubly-linked list.
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