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(have_cmove_flag): New variable.

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(walk_insn_part): Add new parm NON_PC_SET_SRC; all callers changed.
Look for IF_THEN_ELSE in a SET_SRC that isn't setting PC and set
have_cmove_flag if so.
(main): Define HAVE_conditional_move if have_cmove_flag is non-zero.

From-SVN: r1902
This commit is contained in:
Richard Kenner 1992-08-19 21:32:51 -04:00
parent cd1ceb3ca5
commit 674ba2d6bf
1 changed files with 28 additions and 8 deletions
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36
gcc/genconfig.c
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@ -40,6 +40,7 @@ static int max_dup_operands; /* Largest number of match_dup in any insn. */
static int max_clobbers_per_insn;
static int register_constraint_flag;
static int have_cc0_flag;
static int have_cmove_flag;
static int have_lo_sum_flag;
/* Maximum number of insns seen in a split. */
@ -53,11 +54,16 @@ static void fatal ();
void fancy_abort ();
/* RECOG_P will be non-zero if this pattern was seen in a context where it will
be used to recognize, rather than just generate an insn. */
be used to recognize, rather than just generate an insn.
NON_PC_SET_SRC will be non-zero if this pattern was seen in a SET_SRC
of a SET whose destination is not (pc). */
static void
walk_insn_part (part, recog_p)
walk_insn_part (part, recog_p, non_pc_set_src)
rtx part;
int recog_p;
int non_pc_set_src;
{
register int i, j;
register RTX_CODE code;
@ -113,6 +119,17 @@ walk_insn_part (part, recog_p)
have_lo_sum_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:
if (recog_p && non_pc_set_src)
have_cmove_flag = 1;
break;
case REG: case CONST_INT: case SYMBOL_REF:
case PC:
return;
@ -125,12 +142,12 @@ walk_insn_part (part, recog_p)
{
case 'e':
case 'u':
walk_insn_part (XEXP (part, i), recog_p);
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);
walk_insn_part (XVECEXP (part, i, j), recog_p, non_pc_set_src);
break;
}
}
@ -146,7 +163,7 @@ gen_insn (insn)
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);
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;
@ -174,7 +191,7 @@ gen_expand (insn)
don't sum across all of them. */
clobbers_seen_this_insn = 0;
walk_insn_part (XVECEXP (insn, 1, i), 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;
@ -192,7 +209,7 @@ gen_split (split)
/* 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);
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);
@ -207,7 +224,7 @@ gen_peephole (peep)
/* 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);
walk_insn_part (XVECEXP (peep, 0, i), 1, 0);
}
char *
@ -317,6 +334,9 @@ from the machine description file `md'. */\n\n");
if (have_cc0_flag)
printf ("#define HAVE_cc0\n");
if (have_cmove_flag)
printf ("#define HAVE_conditional_move\n");
if (have_lo_sum_flag)
printf ("#define HAVE_lo_sum\n");