static void gen_peephole(rtx peep)
{
int i;
/* Look through the patterns that are matched
to compute the maximum operand number. */
for (i = 0; i < XVECLEN(peep, 0); i++)
walk_insn_part(XVECEXP(peep, 0, i), 1, 0);
}
static void gen_split(rtx split)
{
int i;
/* Look through the patterns that are matched
to compute the maximum operand number. */
for (i = 0; i < XVECLEN(split, 0); i++)
walk_insn_part(XVECEXP(split, 0, i), 1, 0);
/* Look at the number of insns this insn could split into. */
if (XVECLEN(split, 2) > max_insns_per_split)
max_insns_per_split = XVECLEN(split, 2);
}
static void gen_insn(rtx insn)
{
int i;
/* Walk the insn pattern to gather the #define's status. */
clobbers_seen_this_insn = 0;
dup_operands_seen_this_insn = 0;
if (XVEC(insn, 1) != 0)
for (i = 0; i < XVECLEN(insn, 1); i++)
walk_insn_part(XVECEXP(insn, 1, i), 1, 0);
if (clobbers_seen_this_insn > max_clobbers_per_insn)
max_clobbers_per_insn = clobbers_seen_this_insn;
if (dup_operands_seen_this_insn > max_dup_operands)
max_dup_operands = dup_operands_seen_this_insn;
}
static void
gen_peephole2 (rtx peep)
{
int i, n;
/* Look through the patterns that are matched
to compute the maximum operand number. */
for (i = XVECLEN (peep, 0) - 1; i >= 0; --i)
walk_insn_part (XVECEXP (peep, 0, i), 1, 0);
/* Look at the number of insns this insn can be matched from. */
for (i = XVECLEN (peep, 0) - 1, n = 0; i >= 0; --i)
if (GET_CODE (XVECEXP (peep, 0, i)) != MATCH_DUP
&& GET_CODE (XVECEXP (peep, 0, i)) != MATCH_SCRATCH)
n++;
if (n > max_insns_per_peep2)
max_insns_per_peep2 = n;
}
static void gen_expand(rtx insn)
{
int i;
/* Walk the insn pattern to gather the #define's status. */
/* Note that we don't bother recording the number of MATCH_DUPs
that occur in a gen_expand, because only reload cares about that. */
if (XVEC(insn, 1) != 0)
for (i = 0; i < XVECLEN(insn, 1); i++)
{
/* Compute the maximum SETs and CLOBBERS
in any one of the sub-insns;
don't sum across all of them. */
clobbers_seen_this_insn = 0;
walk_insn_part(XVECEXP(insn, 1, i), 0, 0);
if (clobbers_seen_this_insn > max_clobbers_per_insn)
max_clobbers_per_insn = clobbers_seen_this_insn;
}
}
static void
walk_insn_part (rtx part, int recog_p, int non_pc_set_src)
{
int i, j;
RTX_CODE code;
const char *format_ptr;
if (part == 0)
return;
code = GET_CODE (part);
switch (code)
{
case CLOBBER:
clobbers_seen_this_insn++;
break;
case MATCH_OPERAND:
if (XINT (part, 0) > max_recog_operands)
max_recog_operands = XINT (part, 0);
return;
case MATCH_OP_DUP:
case MATCH_PAR_DUP:
++dup_operands_seen_this_insn;
/* FALLTHRU */
case MATCH_SCRATCH:
case MATCH_PARALLEL:
case MATCH_OPERATOR:
if (XINT (part, 0) > max_recog_operands)
max_recog_operands = XINT (part, 0);
/* Now scan the rtl's in the vector inside the MATCH_OPERATOR or
MATCH_PARALLEL. */
break;
case LABEL_REF:
if (GET_CODE (LABEL_REF_LABEL (part)) == MATCH_OPERAND
|| GET_CODE (LABEL_REF_LABEL (part)) == MATCH_DUP)
break;
return;
case MATCH_DUP:
++dup_operands_seen_this_insn;
if (XINT (part, 0) > max_recog_operands)
max_recog_operands = XINT (part, 0);
return;
case CC0:
if (recog_p)
have_cc0_flag = 1;
return;
case LO_SUM:
if (recog_p)
have_lo_sum_flag = 1;
return;
case ROTATE:
if (recog_p)
have_rotate_flag = 1;
return;
case ROTATERT:
if (recog_p)
have_rotatert_flag = 1;
return;
case SET:
walk_insn_part (SET_DEST (part), 0, recog_p);
walk_insn_part (SET_SRC (part), recog_p,
GET_CODE (SET_DEST (part)) != PC);
return;
case IF_THEN_ELSE:
/* Only consider this machine as having a conditional move if the
two arms of the IF_THEN_ELSE are both MATCH_OPERAND. Otherwise,
we have some specific IF_THEN_ELSE construct (like the doz
instruction on the RS/6000) that can't be used in the general
context we want it for. */
if (recog_p && non_pc_set_src
&& GET_CODE (XEXP (part, 1)) == MATCH_OPERAND
&& GET_CODE (XEXP (part, 2)) == MATCH_OPERAND)
have_cmove_flag = 1;
break;
case COND_EXEC:
if (recog_p)
have_cond_exec_flag = 1;
break;
case REG: case CONST_INT: case SYMBOL_REF:
case PC:
return;
default:
break;
}
format_ptr = GET_RTX_FORMAT (GET_CODE (part));
for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++)
switch (*format_ptr++)
{
case 'e':
case 'u':
walk_insn_part (XEXP (part, i), recog_p, non_pc_set_src);
break;
case 'E':
if (XVEC (part, i) != NULL)
for (j = 0; j < XVECLEN (part, i); j++)
walk_insn_part (XVECEXP (part, i, j), recog_p, non_pc_set_src);
break;
}
}
