/* Emit RTL for the GCC expander.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
This file is part of GCC.
#define last_location (cfun->emit->x_last_location)
#define first_label_num (cfun->emit->x_first_label_num)
-static rtx make_jump_insn_raw (rtx);
static rtx make_call_insn_raw (rtx);
static rtx find_line_note (rtx);
static rtx change_address_1 (rtx, enum machine_mode, rtx, int);
return (p->alias ^ (p->align * 1000)
^ ((p->offset ? INTVAL (p->offset) : 0) * 50000)
^ ((p->size ? INTVAL (p->size) : 0) * 2500000)
- ^ (size_t) p->expr);
+ ^ (size_t) iterative_hash_expr (p->expr, 0));
}
/* Returns nonzero if the value represented by X (which is really a
mem_attrs *p = (mem_attrs *) x;
mem_attrs *q = (mem_attrs *) y;
- return (p->alias == q->alias && p->expr == q->expr && p->offset == q->offset
- && p->size == q->size && p->align == q->align);
+ return (p->alias == q->alias && p->offset == q->offset
+ && p->size == q->size && p->align == q->align
+ && (p->expr == q->expr
+ || (p->expr != NULL_TREE && q->expr != NULL_TREE
+ && operand_equal_p (p->expr, q->expr, 0))));
}
/* Allocate a new mem_attrs structure and insert it into the hash table if
rtx value;
unsigned int i;
+ /* There are the following cases (note that there are no modes with
+ HOST_BITS_PER_WIDE_INT < GET_MODE_BITSIZE (mode) < 2 * HOST_BITS_PER_WIDE_INT):
+
+ 1) If GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT, then we use
+ gen_int_mode.
+ 2) GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_WIDE_INT, but the value of
+ the integer fits into HOST_WIDE_INT anyway (i.e., i1 consists only
+ from copies of the sign bit, and sign of i0 and i1 are the same), then
+ we return a CONST_INT for i0.
+ 3) Otherwise, we create a CONST_DOUBLE for i0 and i1. */
if (mode != VOIDmode)
{
- int width;
-
gcc_assert (GET_MODE_CLASS (mode) == MODE_INT
|| GET_MODE_CLASS (mode) == MODE_PARTIAL_INT
/* We can get a 0 for an error mark. */
|| GET_MODE_CLASS (mode) == MODE_VECTOR_INT
|| GET_MODE_CLASS (mode) == MODE_VECTOR_FLOAT);
- /* We clear out all bits that don't belong in MODE, unless they and
- our sign bit are all one. So we get either a reasonable negative
- value or a reasonable unsigned value for this mode. */
- width = GET_MODE_BITSIZE (mode);
- if (width < HOST_BITS_PER_WIDE_INT
- && ((i0 & ((HOST_WIDE_INT) (-1) << (width - 1)))
- != ((HOST_WIDE_INT) (-1) << (width - 1))))
- i0 &= ((HOST_WIDE_INT) 1 << width) - 1, i1 = 0;
- else if (width == HOST_BITS_PER_WIDE_INT
- && ! (i1 == ~0 && i0 < 0))
- i1 = 0;
- else
- /* We should be able to represent this value as a constant. */
- gcc_assert (width <= 2 * HOST_BITS_PER_WIDE_INT);
-
- /* If this would be an entire word for the target, but is not for
- the host, then sign-extend on the host so that the number will
- look the same way on the host that it would on the target.
-
- For example, when building a 64 bit alpha hosted 32 bit sparc
- targeted compiler, then we want the 32 bit unsigned value -1 to be
- represented as a 64 bit value -1, and not as 0x00000000ffffffff.
- The latter confuses the sparc backend. */
-
- if (width < HOST_BITS_PER_WIDE_INT
- && (i0 & ((HOST_WIDE_INT) 1 << (width - 1))))
- i0 |= ((HOST_WIDE_INT) (-1) << width);
-
- /* If MODE fits within HOST_BITS_PER_WIDE_INT, always use a
- CONST_INT.
-
- ??? Strictly speaking, this is wrong if we create a CONST_INT for
- a large unsigned constant with the size of MODE being
- HOST_BITS_PER_WIDE_INT and later try to interpret that constant
- in a wider mode. In that case we will mis-interpret it as a
- negative number.
-
- Unfortunately, the only alternative is to make a CONST_DOUBLE for
- any constant in any mode if it is an unsigned constant larger
- than the maximum signed integer in an int on the host. However,
- doing this will break everyone that always expects to see a
- CONST_INT for SImode and smaller.
-
- We have always been making CONST_INTs in this case, so nothing
- new is being broken. */
-
- if (width <= HOST_BITS_PER_WIDE_INT)
- i1 = (i0 < 0) ? ~(HOST_WIDE_INT) 0 : 0;
+ if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT)
+ return gen_int_mode (i0, mode);
+
+ gcc_assert (GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_WIDE_INT);
}
/* If this integer fits in one word, return a CONST_INT. */
index, low_bound);
off_tree = size_binop (PLUS_EXPR,
- size_binop (MULT_EXPR, convert (sizetype,
- index),
+ size_binop (MULT_EXPR,
+ fold_convert (sizetype,
+ index),
unit_size),
off_tree);
t2 = TREE_OPERAND (t2, 0);
unshare_all_rtl_1 (cfun->decl, insn);
}
-void
+unsigned int
unshare_all_rtl (void)
{
unshare_all_rtl_1 (current_function_decl, get_insns ());
+ return 0;
}
struct tree_opt_pass pass_unshare_all_rtl =
if (RTX_FLAG (x, used))
{
- rtx copy;
-
- copy = rtx_alloc (code);
- memcpy (copy, x, RTX_SIZE (code));
- x = copy;
+ x = shallow_copy_rtx (x);
copied = 1;
}
RTX_FLAG (x, used) = 1;
/* Renumber instructions so that no instruction UIDs are wasted. */
void
-renumber_insns (FILE *stream)
+renumber_insns (void)
{
rtx insn;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
{
- if (stream)
- fprintf (stream, "Renumbering insn %d to %d\n",
+ if (dump_file)
+ fprintf (dump_file, "Renumbering insn %d to %d\n",
INSN_UID (insn), cur_insn_uid);
INSN_UID (insn) = cur_insn_uid++;
}
/* Like `make_insn_raw' but make a JUMP_INSN instead of an insn. */
-static rtx
+rtx
make_jump_insn_raw (rtx pattern)
{
rtx insn;
return insn;
}
-/* Remove unnecessary notes from the instruction stream. */
-
-void
-remove_unnecessary_notes (void)
-{
- rtx eh_stack = NULL_RTX;
- rtx insn;
- rtx next;
- rtx tmp;
-
- /* We must not remove the first instruction in the function because
- the compiler depends on the first instruction being a note. */
- for (insn = NEXT_INSN (get_insns ()); insn; insn = next)
- {
- /* Remember what's next. */
- next = NEXT_INSN (insn);
-
- /* We're only interested in notes. */
- if (!NOTE_P (insn))
- continue;
-
- switch (NOTE_LINE_NUMBER (insn))
- {
- case NOTE_INSN_DELETED:
- remove_insn (insn);
- break;
-
- case NOTE_INSN_EH_REGION_BEG:
- eh_stack = alloc_INSN_LIST (insn, eh_stack);
- break;
-
- case NOTE_INSN_EH_REGION_END:
- /* Too many end notes. */
- gcc_assert (eh_stack);
- /* Mismatched nesting. */
- gcc_assert (NOTE_EH_HANDLER (XEXP (eh_stack, 0))
- == NOTE_EH_HANDLER (insn));
- tmp = eh_stack;
- eh_stack = XEXP (eh_stack, 1);
- free_INSN_LIST_node (tmp);
- break;
-
- case NOTE_INSN_BLOCK_BEG:
- case NOTE_INSN_BLOCK_END:
- /* BLOCK_END and BLOCK_BEG notes only exist in the `final' pass. */
- gcc_unreachable ();
-
- default:
- break;
- }
- }
-
- /* Too many EH_REGION_BEG notes. */
- 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.
\f
/* Put the various virtual registers into REGNO_REG_RTX. */
-void
+static void
init_virtual_regs (struct emit_status *es)
{
rtx *ptr = es->x_regno_reg_rtx;
break;
}
- copy = rtx_alloc (code);
-
- /* Copy the various flags, and other information. We assume that
- all fields need copying, and then clear the fields that should
+ /* Copy the various flags, fields, and other information. We assume
+ that all fields need copying, and then clear the fields that should
not be copied. That is the sensible default behavior, and forces
us to explicitly document why we are *not* copying a flag. */
- memcpy (copy, orig, RTX_HDR_SIZE);
+ copy = shallow_copy_rtx (orig);
/* We do not copy the USED flag, which is used as a mark bit during
walks over the RTL. */
format_ptr = GET_RTX_FORMAT (GET_CODE (copy));
for (i = 0; i < GET_RTX_LENGTH (GET_CODE (copy)); i++)
- {
- copy->u.fld[i] = orig->u.fld[i];
- switch (*format_ptr++)
- {
- case 'e':
- if (XEXP (orig, i) != NULL)
- XEXP (copy, i) = copy_insn_1 (XEXP (orig, i));
- break;
+ switch (*format_ptr++)
+ {
+ case 'e':
+ if (XEXP (orig, i) != NULL)
+ XEXP (copy, i) = copy_insn_1 (XEXP (orig, i));
+ break;
- case 'E':
- case 'V':
- if (XVEC (orig, i) == orig_asm_constraints_vector)
- XVEC (copy, i) = copy_asm_constraints_vector;
- else if (XVEC (orig, i) == orig_asm_operands_vector)
- XVEC (copy, i) = copy_asm_operands_vector;
- else if (XVEC (orig, i) != NULL)
- {
- XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
- for (j = 0; j < XVECLEN (copy, i); j++)
- XVECEXP (copy, i, j) = copy_insn_1 (XVECEXP (orig, i, j));
- }
- break;
+ case 'E':
+ case 'V':
+ if (XVEC (orig, i) == orig_asm_constraints_vector)
+ XVEC (copy, i) = copy_asm_constraints_vector;
+ else if (XVEC (orig, i) == orig_asm_operands_vector)
+ XVEC (copy, i) = copy_asm_operands_vector;
+ else if (XVEC (orig, i) != NULL)
+ {
+ XVEC (copy, i) = rtvec_alloc (XVECLEN (orig, i));
+ for (j = 0; j < XVECLEN (copy, i); j++)
+ XVECEXP (copy, i, j) = copy_insn_1 (XVECEXP (orig, i, j));
+ }
+ break;
- case 't':
- case 'w':
- case 'i':
- case 's':
- case 'S':
- case 'u':
- case '0':
- /* These are left unchanged. */
- break;
+ case 't':
+ case 'w':
+ case 'i':
+ case 's':
+ case 'S':
+ case 'u':
+ case '0':
+ /* These are left unchanged. */
+ break;
- default:
- gcc_unreachable ();
- }
- }
+ default:
+ gcc_unreachable ();
+ }
if (code == SCRATCH)
{
units = GET_MODE_NUNITS (mode);
inner = GET_MODE_INNER (mode);
+ gcc_assert (!DECIMAL_FLOAT_MODE_P (inner));
+
v = rtvec_alloc (units);
/* We need to call this function after we set the scalar const_tiny_rtx
word_mode = VOIDmode;
double_mode = VOIDmode;
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
+ mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
{
if (GET_MODE_BITSIZE (mode) == BITS_PER_UNIT
word_mode = mode;
}
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
+ mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
{
if (GET_MODE_BITSIZE (mode) == DOUBLE_TYPE_SIZE
REAL_VALUE_TYPE *r =
(i == 0 ? &dconst0 : i == 1 ? &dconst1 : &dconst2);
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
+ mode != VOIDmode;
+ mode = GET_MODE_WIDER_MODE (mode))
+ const_tiny_rtx[i][(int) mode] =
+ CONST_DOUBLE_FROM_REAL_VALUE (*r, mode);
+
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_DECIMAL_FLOAT);
+ mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
const_tiny_rtx[i][(int) mode] =
CONST_DOUBLE_FROM_REAL_VALUE (*r, mode);
const_tiny_rtx[i][(int) VOIDmode] = GEN_INT (i);
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
+ for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
+ mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
const_tiny_rtx[i][(int) mode] = GEN_INT (i);
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