#include "tm_p.h"
#include "insn-config.h"
#include "insn-attr.h"
-#include "insn-flags.h"
-#include "insn-codes.h"
#include "hard-reg-set.h"
#include "recog.h"
#include "regs.h"
static void validate_replace_rtx_1 PARAMS ((rtx *, rtx, rtx, rtx));
static rtx *find_single_use_1 PARAMS ((rtx, rtx *));
static rtx *find_constant_term_loc PARAMS ((rtx *));
-static int insn_invalid_p PARAMS ((rtx));
static void validate_replace_src_1 PARAMS ((rtx *, void *));
/* Nonzero means allow operands to be volatile.
rtx insn;
{
if (INSN_CODE (insn) < 0)
- INSN_CODE (insn) = recog (PATTERN (insn), insn, NULL_PTR);
+ INSN_CODE (insn) = recog (PATTERN (insn), insn, 0);
return INSN_CODE (insn);
}
\f
operands = (rtx *) alloca (noperands * sizeof (rtx));
constraints = (const char **) alloca (noperands * sizeof (char *));
- decode_asm_operands (x, operands, NULL_PTR, constraints, NULL_PTR);
+ decode_asm_operands (x, operands, NULL, constraints, NULL);
for (i = 0; i < noperands; i++)
{
if (in_group == 0 && num_changes != 0)
abort ();
- *loc = new;
+ *loc = new;
/* Save the information describing this change. */
if (num_changes >= changes_allocated)
/* This subroutine of apply_change_group verifies whether the changes to INSN
were valid; i.e. whether INSN can still be recognized. */
-static int
+int
insn_invalid_p (insn)
rtx insn;
{
- int icode = recog_memoized (insn);
+ rtx pat = PATTERN (insn);
+ int num_clobbers = 0;
+ /* If we are before reload and the pattern is a SET, see if we can add
+ clobbers. */
+ int icode = recog (pat, insn,
+ (GET_CODE (pat) == SET
+ && ! reload_completed && ! reload_in_progress)
+ ? &num_clobbers : 0);
int is_asm = icode < 0 && asm_noperands (PATTERN (insn)) >= 0;
- if (is_asm && ! check_asm_operands (PATTERN (insn)))
- return 1;
- if (! is_asm && icode < 0)
+
+ /* If this is an asm and the operand aren't legal, then fail. Likewise if
+ this is not an asm and the insn wasn't recognized. */
+ if ((is_asm && ! check_asm_operands (PATTERN (insn)))
+ || (!is_asm && icode < 0))
return 1;
+ /* If we have to add CLOBBERs, fail if we have to add ones that reference
+ hard registers since our callers can't know if they are live or not.
+ Otherwise, add them. */
+ if (num_clobbers > 0)
+ {
+ rtx newpat;
+
+ if (added_clobbers_hard_reg_p (icode))
+ return 1;
+
+ newpat = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (num_clobbers + 1));
+ XVECEXP (newpat, 0, 0) = pat;
+ add_clobbers (newpat, icode);
+ PATTERN (insn) = pat = newpat;
+ }
+
/* After reload, verify that all constraints are satisfied. */
if (reload_completed)
{
return 1;
}
+ INSN_CODE (insn) = icode;
return 0;
}
apply_change_group ()
{
int i;
+ rtx last_validated = NULL_RTX;
/* The changes have been applied and all INSN_CODEs have been reset to force
rerecognition.
{
rtx object = changes[i].object;
- if (object == 0)
+ /* if there is no object to test or if it is the same as the one we
+ already tested, ignore it. */
+ if (object == 0 || object == last_validated)
continue;
if (GET_CODE (object) == MEM)
but this shouldn't occur. */
validate_change (object, &PATTERN (object), newpat, 1);
+ continue;
}
else if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER)
/* If this insn is a CLOBBER or USE, it is always valid, but is
else
break;
}
+ last_validated = object;
}
if (i == num_changes)
register const char *fmt;
register rtx x = *loc;
enum rtx_code code;
+ enum machine_mode op0_mode = VOIDmode;
+ int prev_changes = num_changes;
+ rtx new;
if (!x)
return;
+
code = GET_CODE (x);
+ fmt = GET_RTX_FORMAT (code);
+ if (fmt[0] == 'e')
+ op0_mode = GET_MODE (XEXP (x, 0));
+
/* X matches FROM if it is the same rtx or they are both referring to the
same register in the same mode. Avoid calling rtx_equal_p unless the
operands look similar. */
return;
}
- /* For commutative or comparison operations, try replacing each argument
- separately and seeing if we made any changes. If so, put a constant
- argument last.*/
- if (GET_RTX_CLASS (code) == '<' || GET_RTX_CLASS (code) == 'c')
- {
- int prev_changes = num_changes;
+ /* Call ourseves recursivly to perform the replacements. */
- validate_replace_rtx_1 (&XEXP (x, 0), from, to, object);
- validate_replace_rtx_1 (&XEXP (x, 1), from, to, object);
- if (prev_changes != num_changes && CONSTANT_P (XEXP (x, 0)))
- {
- validate_change (object, loc,
- gen_rtx_fmt_ee (GET_RTX_CLASS (code) == 'c' ? code
- : swap_condition (code),
- GET_MODE (x), XEXP (x, 1),
- XEXP (x, 0)),
- 1);
- x = *loc;
- code = GET_CODE (x);
- }
+ for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
+ {
+ if (fmt[i] == 'e')
+ validate_replace_rtx_1 (&XEXP (x, i), from, to, object);
+ else if (fmt[i] == 'E')
+ for (j = XVECLEN (x, i) - 1; j >= 0; j--)
+ validate_replace_rtx_1 (&XVECEXP (x, i, j), from, to, object);
}
- /* Note that if CODE's RTX_CLASS is "c" or "<" we will have already
- done the substitution, otherwise we won't. */
+ /* In case we didn't substituted, there is nothing to do. */
+ if (num_changes == prev_changes)
+ return;
+
+ /* Allow substituted expression to have different mode. This is used by
+ regmove to change mode of pseudo register. */
+ if (fmt[0] == 'e' && GET_MODE (XEXP (x, 0)) != VOIDmode)
+ op0_mode = GET_MODE (XEXP (x, 0));
+
+ /* Do changes needed to keep rtx consistent. Don't do any other
+ simplifications, as it is not our job. */
+
+ if ((GET_RTX_CLASS (code) == '<' || GET_RTX_CLASS (code) == 'c')
+ && swap_commutative_operands_p (XEXP (x, 0), XEXP (x, 1)))
+ {
+ validate_change (object, loc,
+ gen_rtx_fmt_ee (GET_RTX_CLASS (code) == 'c' ? code
+ : swap_condition (code),
+ GET_MODE (x), XEXP (x, 1),
+ XEXP (x, 0)), 1);
+ x = *loc;
+ code = GET_CODE (x);
+ }
switch (code)
{
case PLUS:
/* If we have a PLUS whose second operand is now a CONST_INT, use
- plus_constant to try to simplify it. */
+ plus_constant to try to simplify it.
+ ??? We may want later to remove this, once simplification is
+ separated from this function. */
if (GET_CODE (XEXP (x, 1)) == CONST_INT && XEXP (x, 1) == to)
- validate_change (object, loc, plus_constant (XEXP (x, 0), INTVAL (to)),
- 1);
- return;
-
+ validate_change (object, loc,
+ plus_constant (XEXP (x, 0), INTVAL (to)), 1);
+ break;
case MINUS:
- if (GET_CODE (to) == CONST_INT && XEXP (x, 1) == from)
- {
- validate_change (object, loc,
- plus_constant (XEXP (x, 0), - INTVAL (to)),
- 1);
- return;
- }
+ if (GET_CODE (XEXP (x, 1)) == CONST_INT
+ || GET_CODE (XEXP (x, 1)) == CONST_DOUBLE)
+ validate_change (object, loc,
+ simplify_gen_binary
+ (PLUS, GET_MODE (x), XEXP (x, 0),
+ simplify_gen_unary (NEG,
+ op0_mode, XEXP (x, 1),
+ op0_mode)), 1);
break;
-
case ZERO_EXTEND:
case SIGN_EXTEND:
- /* In these cases, the operation to be performed depends on the mode
- of the operand. If we are replacing the operand with a VOIDmode
- constant, we lose the information. So try to simplify the operation
- in that case. */
- if (GET_MODE (to) == VOIDmode
- && (rtx_equal_p (XEXP (x, 0), from)
- || (GET_CODE (XEXP (x, 0)) == SUBREG
- && rtx_equal_p (SUBREG_REG (XEXP (x, 0)), from))))
+ if (GET_MODE (XEXP (x, 0)) == VOIDmode)
{
- rtx new = NULL_RTX;
-
- /* If there is a subreg involved, crop to the portion of the
- constant that we are interested in. */
- if (GET_CODE (XEXP (x, 0)) == SUBREG)
- {
- if (GET_MODE_SIZE (GET_MODE (XEXP (x, 0))) <= UNITS_PER_WORD)
- to = operand_subword (to, SUBREG_WORD (XEXP (x, 0)),
- 0, GET_MODE (from));
- else if (GET_MODE_CLASS (GET_MODE (from)) == MODE_INT
- && (GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0)))
- <= HOST_BITS_PER_WIDE_INT))
- {
- int i = SUBREG_WORD (XEXP (x, 0)) * BITS_PER_WORD;
- HOST_WIDE_INT valh;
- unsigned HOST_WIDE_INT vall;
-
- if (GET_CODE (to) == CONST_INT)
- {
- vall = INTVAL (to);
- valh = (HOST_WIDE_INT) vall < 0 ? ~0 : 0;
- }
- else
- {
- vall = CONST_DOUBLE_LOW (to);
- valh = CONST_DOUBLE_HIGH (to);
- }
-
- if (WORDS_BIG_ENDIAN)
- i = (GET_MODE_BITSIZE (GET_MODE (from))
- - GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0))) - i);
- if (i > 0 && i < HOST_BITS_PER_WIDE_INT)
- vall = vall >> i | valh << (HOST_BITS_PER_WIDE_INT - i);
- else if (i >= HOST_BITS_PER_WIDE_INT)
- vall = valh >> (i - HOST_BITS_PER_WIDE_INT);
- to = GEN_INT (trunc_int_for_mode (vall,
- GET_MODE (XEXP (x, 0))));
- }
- else
- to = gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);
- }
-
- /* If the above didn't fail, perform the extension from the
- mode of the operand (and not the mode of FROM). */
- if (to)
- new = simplify_unary_operation (code, GET_MODE (x), to,
- GET_MODE (XEXP (x, 0)));
-
+ new = simplify_gen_unary (code, GET_MODE (x), XEXP (x, 0),
+ op0_mode);
/* If any of the above failed, substitute in something that
we know won't be recognized. */
if (!new)
new = gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);
-
validate_change (object, loc, new, 1);
- return;
}
break;
-
case SUBREG:
- /* In case we are replacing by constant, attempt to simplify it to non-SUBREG
- expression. We can't do this later, since the information about inner mode
- may be lost. */
- if (CONSTANT_P (to) && rtx_equal_p (SUBREG_REG (x), from))
- {
- if (GET_MODE_SIZE (GET_MODE (x)) == UNITS_PER_WORD
- && GET_MODE_SIZE (GET_MODE (from)) > UNITS_PER_WORD
- && GET_MODE_CLASS (GET_MODE (x)) == MODE_INT)
- {
- rtx temp = operand_subword (to, SUBREG_WORD (x),
- 0, GET_MODE (from));
- if (temp)
- {
- validate_change (object, loc, temp, 1);
- return;
- }
- }
- if (subreg_lowpart_p (x))
- {
- rtx new = gen_lowpart_if_possible (GET_MODE (x), to);
- if (new)
- {
- validate_change (object, loc, new, 1);
- return;
- }
- }
-
- /* A paradoxical SUBREG of a VOIDmode constant is the same constant,
- since we are saying that the high bits don't matter. */
- if (GET_MODE (to) == VOIDmode
- && GET_MODE_SIZE (GET_MODE (x)) > GET_MODE_SIZE (GET_MODE (from)))
- {
- validate_change (object, loc, to, 1);
- return;
- }
- }
-
- /* Changing mode twice with SUBREG => just change it once,
- or not at all if changing back to starting mode. */
- if (GET_CODE (to) == SUBREG
- && rtx_equal_p (SUBREG_REG (x), from))
- {
- if (GET_MODE (x) == GET_MODE (SUBREG_REG (to))
- && SUBREG_WORD (x) == 0 && SUBREG_WORD (to) == 0)
- {
- validate_change (object, loc, SUBREG_REG (to), 1);
- return;
- }
-
- validate_change (object, loc,
- gen_rtx_SUBREG (GET_MODE (x), SUBREG_REG (to),
- SUBREG_WORD (x) + SUBREG_WORD (to)), 1);
- return;
- }
-
- /* If we have a SUBREG of a register that we are replacing and we are
- replacing it with a MEM, make a new MEM and try replacing the
- SUBREG with it. Don't do this if the MEM has a mode-dependent address
- or if we would be widening it. */
-
- if (GET_CODE (from) == REG
- && GET_CODE (to) == MEM
- && rtx_equal_p (SUBREG_REG (x), from)
- && ! mode_dependent_address_p (XEXP (to, 0))
- && ! MEM_VOLATILE_P (to)
- && GET_MODE_SIZE (GET_MODE (x)) <= GET_MODE_SIZE (GET_MODE (to)))
- {
- int offset = SUBREG_WORD (x) * UNITS_PER_WORD;
- enum machine_mode mode = GET_MODE (x);
- rtx new;
-
- if (BYTES_BIG_ENDIAN)
- offset += (MIN (UNITS_PER_WORD,
- GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))
- - MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode)));
-
- new = gen_rtx_MEM (mode, plus_constant (XEXP (to, 0), offset));
- MEM_COPY_ATTRIBUTES (new, to);
- validate_change (object, loc, new, 1);
- return;
- }
+ /* All subregs possible to simplify should be simplified. */
+ new = simplify_subreg (GET_MODE (x), SUBREG_REG (x), op0_mode,
+ SUBREG_BYTE (x));
+
+ /* Subregs of VOIDmode operands are incorect. */
+ if (!new && GET_MODE (SUBREG_REG (x)) == VOIDmode)
+ new = gen_rtx_CLOBBER (GET_MODE (x), const0_rtx);
+ if (new)
+ validate_change (object, loc, new, 1);
break;
-
case ZERO_EXTRACT:
case SIGN_EXTRACT:
/* If we are replacing a register with memory, try to change the memory
- to be the mode required for memory in extract operations (this isn't
- likely to be an insertion operation; if it was, nothing bad will
- happen, we might just fail in some cases). */
+ to be the mode required for memory in extract operations (this isn't
+ likely to be an insertion operation; if it was, nothing bad will
+ happen, we might just fail in some cases). */
- if (GET_CODE (from) == REG && GET_CODE (to) == MEM
- && rtx_equal_p (XEXP (x, 0), from)
+ if (GET_CODE (XEXP (x, 0)) == MEM
&& GET_CODE (XEXP (x, 1)) == CONST_INT
&& GET_CODE (XEXP (x, 2)) == CONST_INT
- && ! mode_dependent_address_p (XEXP (to, 0))
- && ! MEM_VOLATILE_P (to))
+ && !mode_dependent_address_p (XEXP (XEXP (x, 0), 0))
+ && !MEM_VOLATILE_P (XEXP (x, 0)))
{
enum machine_mode wanted_mode = VOIDmode;
- enum machine_mode is_mode = GET_MODE (to);
+ enum machine_mode is_mode = GET_MODE (XEXP (x, 0));
int pos = INTVAL (XEXP (x, 2));
#ifdef HAVE_extzv
int offset = pos / BITS_PER_UNIT;
rtx newmem;
- /* If the bytes and bits are counted differently, we
- must adjust the offset. */
+ /* If the bytes and bits are counted differently, we
+ must adjust the offset. */
if (BYTES_BIG_ENDIAN != BITS_BIG_ENDIAN)
- offset = (GET_MODE_SIZE (is_mode) - GET_MODE_SIZE (wanted_mode)
- - offset);
+ offset =
+ (GET_MODE_SIZE (is_mode) - GET_MODE_SIZE (wanted_mode) -
+ offset);
pos %= GET_MODE_BITSIZE (wanted_mode);
newmem = gen_rtx_MEM (wanted_mode,
- plus_constant (XEXP (to, 0), offset));
- MEM_COPY_ATTRIBUTES (newmem, to);
+ plus_constant (XEXP (XEXP (x, 0), 0),
+ offset));
+ MEM_COPY_ATTRIBUTES (newmem, XEXP (x, 0));
validate_change (object, &XEXP (x, 2), GEN_INT (pos), 1);
validate_change (object, &XEXP (x, 0), newmem, 1);
}
break;
-
+
default:
break;
}
-
- /* For commutative or comparison operations we've already performed
- replacements. Don't try to perform them again. */
- if (GET_RTX_CLASS (code) != '<' && GET_RTX_CLASS (code) != 'c')
- {
- fmt = GET_RTX_FORMAT (code);
- for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
- {
- if (fmt[i] == 'e')
- validate_replace_rtx_1 (&XEXP (x, i), from, to, object);
- else if (fmt[i] == 'E')
- for (j = XVECLEN (x, i) - 1; j >= 0; j--)
- validate_replace_rtx_1 (&XVECEXP (x, i, j), from, to, object);
- }
- }
}
/* Try replacing every occurrence of FROM in subexpression LOC of INSN
/* Function called by note_uses to replace used subexpressions. */
struct validate_replace_src_data
- {
- rtx from, to, insn;
- };
+{
+ rtx from; /* Old RTX */
+ rtx to; /* New RTX */
+ rtx insn; /* Insn in which substitution is occurring. */
+};
static void
validate_replace_src_1 (x, data)
enum machine_mode mode;
{
register enum rtx_code code = GET_CODE (op);
- int mode_altering_drug = 0;
if (mode == VOIDmode)
mode = GET_MODE (op);
&& GET_MODE_CLASS (mode) != MODE_PARTIAL_INT)
return 0;
+ if (GET_CODE (op) == CONST_INT
+ && trunc_int_for_mode (INTVAL (op), mode) != INTVAL (op))
+ return 0;
+
if (CONSTANT_P (op))
return ((GET_MODE (op) == VOIDmode || GET_MODE (op) == mode
|| mode == VOIDmode)
&& GET_MODE_SIZE (mode) > GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))))
return 0;
#endif
+ /* Avoid memories with nonzero SUBREG_BYTE, as offsetting the memory
+ may result in incorrect reference. We should simplify all valid
+ subregs of MEM anyway. But allow this after reload because we
+ might be called from cleanup_subreg_operands.
+
+ ??? This is a kludge. */
+ if (!reload_completed && SUBREG_BYTE (op) != 0
+ && GET_CODE (SUBREG_REG (op)) == MEM)
+ return 0;
op = SUBREG_REG (op);
code = GET_CODE (op);
-#if 0
- /* No longer needed, since (SUBREG (MEM...))
- will load the MEM into a reload reg in the MEM's own mode. */
- mode_altering_drug = 1;
-#endif
}
if (code == REG)
return 0;
win:
- if (mode_altering_drug)
- return ! mode_dependent_address_p (XEXP (op, 0));
return 1;
}
\f
&& GET_MODE_CLASS (mode) != MODE_PARTIAL_INT)
return 0;
+ if (GET_CODE (op) == CONST_INT
+ && trunc_int_for_mode (INTVAL (op), mode) != INTVAL (op))
+ return 0;
+
/* Accept CONSTANT_P_RTX, since it will be gone by CSE1 and
result in 0/1. It seems a safe assumption that this is
in range for everyone. */
int
const_int_operand (op, mode)
register rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
+ enum machine_mode mode;
{
- return GET_CODE (op) == CONST_INT;
+ if (GET_CODE (op) != CONST_INT)
+ return 0;
+
+ if (mode != VOIDmode
+ && trunc_int_for_mode (INTVAL (op), mode) != INTVAL (op))
+ return 0;
+
+ return 1;
}
/* Returns 1 if OP is an operand that is a constant integer or constant
&& GET_MODE_CLASS (mode) != MODE_PARTIAL_INT)
return 0;
+ if (GET_CODE (op) == CONST_INT
+ && trunc_int_for_mode (INTVAL (op), mode) != INTVAL (op))
+ return 0;
+
return ((GET_MODE (op) == VOIDmode || GET_MODE (op) == mode
|| mode == VOIDmode)
#ifdef LEGITIMATE_PIC_OPERAND_P
rtx op;
enum machine_mode mode;
{
+ unsigned int rounded_size = GET_MODE_SIZE (mode);
+
+#ifdef PUSH_ROUNDING
+ rounded_size = PUSH_ROUNDING (rounded_size);
+#endif
+
if (GET_CODE (op) != MEM)
return 0;
op = XEXP (op, 0);
- if (GET_CODE (op) != STACK_PUSH_CODE)
- return 0;
+ if (rounded_size == GET_MODE_SIZE (mode))
+ {
+ if (GET_CODE (op) != STACK_PUSH_CODE)
+ return 0;
+ }
+ else
+ {
+ if (GET_CODE (op) != PRE_MODIFY
+ || GET_CODE (XEXP (op, 1)) != PLUS
+ || XEXP (XEXP (op, 1), 0) != XEXP (op, 0)
+ || GET_CODE (XEXP (XEXP (op, 1), 1)) != CONST_INT
+#ifdef STACK_GROWS_DOWNWARD
+ || INTVAL (XEXP (XEXP (op, 1), 1)) != - (int) rounded_size
+#else
+ || INTVAL (XEXP (XEXP (op, 1), 1)) != rounded_size
+#endif
+ )
+ return 0;
+ }
return XEXP (op, 0) == stack_pointer_rtx;
}
if (! reload_completed
&& GET_CODE (op) == SUBREG && GET_CODE (SUBREG_REG (op)) == MEM)
{
- register int offset = SUBREG_WORD (op) * UNITS_PER_WORD;
+ register int offset = SUBREG_BYTE (op);
rtx inner = SUBREG_REG (op);
- if (BYTES_BIG_ENDIAN)
- offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (op)))
- - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (inner))));
-
if (mode != VOIDmode && GET_MODE (op) != mode)
return 0;
{
if (GET_CODE (SUBREG_REG (op)) == REG
&& REGNO (SUBREG_REG (op)) < FIRST_PSEUDO_REGISTER)
- offset = SUBREG_WORD (op);
+ offset = subreg_regno_offset (REGNO (SUBREG_REG (op)),
+ GET_MODE (SUBREG_REG (op)),
+ SUBREG_BYTE (op),
+ GET_MODE (op));
op = SUBREG_REG (op);
}
break the code that handles REG_NO_CONFLICT blocks. */
else if ((set = single_set (insn)) != NULL
- && rtx_equal_p (SET_SRC (set), SET_DEST (set)))
+ && set_noop_p (set))
{
/* Nops get in the way while scheduling, so delete them
now if register allocation has already been done. It
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