genpreds.c (process_define_predicate): Move most processing to gensupport.c.
gcc/ * genpreds.c (process_define_predicate): Move most processing to gensupport.c. Continue to validate the expression. * genrecog.c (did_you_mean_codes, compute_predicate_codes) (process_define_predicate): Move processing to gensupport.c. (main): Remove DEFINE_PREDICATE and DEFINE_SPECIAL_PREDICATE cases. * gensupport.c (did_you_mean_codes): Moved from genrecog.c. (compute_predicate_codes): Moved from genrecog.c. Add lineno argument. (valid_predicate_name_p): New function, split out from old genpreds.c:process_define_predicate. (process_define_predicate): New function, combining code from old genpreds.c and genrecog.c functions. (process_rtx): Call it for DEFINE_PREDICATE and DEFINE_SPECIAL_PREDICATE. From-SVN: r172315
This commit is contained in:
Richard Sandiford
Richard Sandiford
parent
6308e208c2
commit
77059241d8
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@ -1,3 +1,20 @@
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2011-04-12 Richard Sandiford <richard.sandiford@linaro.org>
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* genpreds.c (process_define_predicate): Move most processing
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to gensupport.c. Continue to validate the expression.
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* genrecog.c (did_you_mean_codes, compute_predicate_codes)
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(process_define_predicate): Move processing to gensupport.c.
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(main): Remove DEFINE_PREDICATE and DEFINE_SPECIAL_PREDICATE cases.
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* gensupport.c (did_you_mean_codes): Moved from genrecog.c.
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(compute_predicate_codes): Moved from genrecog.c. Add lineno
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argument.
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(valid_predicate_name_p): New function, split out from old
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genpreds.c:process_define_predicate.
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(process_define_predicate): New function, combining code from
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old genpreds.c and genrecog.c functions.
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(process_rtx): Call it for DEFINE_PREDICATE and
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DEFINE_SPECIAL_PREDICATE.
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2011-04-12 Richard Sandiford <richard.sandiford@linaro.org>
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* config/arm/arm.c (arm_print_operand): Use MEM_SIZE to get the
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@ -93,34 +93,7 @@ validate_exp (rtx exp, const char *name, int lineno)
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static void
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process_define_predicate (rtx defn, int lineno)
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{
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struct pred_data *pred;
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const char *p;
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if (!ISALPHA (XSTR (defn, 0)[0]) && XSTR (defn, 0)[0] != '_')
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goto bad_name;
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for (p = XSTR (defn, 0) + 1; *p; p++)
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if (!ISALNUM (*p) && *p != '_')
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goto bad_name;
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if (validate_exp (XEXP (defn, 1), XSTR (defn, 0), lineno))
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return;
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pred = XCNEW (struct pred_data);
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pred->name = XSTR (defn, 0);
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pred->exp = XEXP (defn, 1);
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pred->c_block = XSTR (defn, 2);
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if (GET_CODE (defn) == DEFINE_SPECIAL_PREDICATE)
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pred->special = true;
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add_predicate (pred);
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return;
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bad_name:
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error_with_line (lineno,
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"%s: predicate name must be a valid C function name",
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XSTR (defn, 0));
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return;
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validate_exp (XEXP (defn, 1), XSTR (defn, 0), lineno);
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}
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/* Given a predicate, if it has an embedded C block, write the block
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218
gcc/genrecog.c
218
gcc/genrecog.c
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@ -170,219 +170,6 @@ static int max_depth;
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/* The line number of the start of the pattern currently being processed. */
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static int pattern_lineno;
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/* Predicate handling.
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We construct from the machine description a table mapping each
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predicate to a list of the rtl codes it can possibly match. The
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function 'maybe_both_true' uses it to deduce that there are no
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expressions that can be matches by certain pairs of tree nodes.
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Also, if a predicate can match only one code, we can hardwire that
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code into the node testing the predicate.
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Some predicates are flagged as special. validate_pattern will not
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warn about modeless match_operand expressions if they have a
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special predicate. Predicates that allow only constants are also
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treated as special, for this purpose.
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validate_pattern will warn about predicates that allow non-lvalues
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when they appear in destination operands.
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Calculating the set of rtx codes that can possibly be accepted by a
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predicate expression EXP requires a three-state logic: any given
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subexpression may definitively accept a code C (Y), definitively
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reject a code C (N), or may have an indeterminate effect (I). N
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and I is N; Y or I is Y; Y and I, N or I are both I. Here are full
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truth tables.
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a b a&b a|b
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Y Y Y Y
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N Y N Y
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N N N N
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I Y I Y
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I N N I
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I I I I
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We represent Y with 1, N with 0, I with 2. If any code is left in
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an I state by the complete expression, we must assume that that
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code can be accepted. */
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#define N 0
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#define Y 1
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#define I 2
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#define TRISTATE_AND(a,b) \
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((a) == I ? ((b) == N ? N : I) : \
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(b) == I ? ((a) == N ? N : I) : \
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(a) && (b))
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#define TRISTATE_OR(a,b) \
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((a) == I ? ((b) == Y ? Y : I) : \
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(b) == I ? ((a) == Y ? Y : I) : \
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(a) || (b))
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#define TRISTATE_NOT(a) \
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((a) == I ? I : !(a))
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/* 0 means no warning about that code yet, 1 means warned. */
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static char did_you_mean_codes[NUM_RTX_CODE];
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/* Recursively calculate the set of rtx codes accepted by the
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predicate expression EXP, writing the result to CODES. */
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static void
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compute_predicate_codes (rtx exp, char codes[NUM_RTX_CODE])
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{
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char op0_codes[NUM_RTX_CODE];
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char op1_codes[NUM_RTX_CODE];
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char op2_codes[NUM_RTX_CODE];
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int i;
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switch (GET_CODE (exp))
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{
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case AND:
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compute_predicate_codes (XEXP (exp, 0), op0_codes);
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compute_predicate_codes (XEXP (exp, 1), op1_codes);
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for (i = 0; i < NUM_RTX_CODE; i++)
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codes[i] = TRISTATE_AND (op0_codes[i], op1_codes[i]);
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break;
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case IOR:
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compute_predicate_codes (XEXP (exp, 0), op0_codes);
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compute_predicate_codes (XEXP (exp, 1), op1_codes);
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for (i = 0; i < NUM_RTX_CODE; i++)
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codes[i] = TRISTATE_OR (op0_codes[i], op1_codes[i]);
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break;
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case NOT:
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compute_predicate_codes (XEXP (exp, 0), op0_codes);
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for (i = 0; i < NUM_RTX_CODE; i++)
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codes[i] = TRISTATE_NOT (op0_codes[i]);
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break;
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case IF_THEN_ELSE:
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/* a ? b : c accepts the same codes as (a & b) | (!a & c). */
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compute_predicate_codes (XEXP (exp, 0), op0_codes);
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compute_predicate_codes (XEXP (exp, 1), op1_codes);
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compute_predicate_codes (XEXP (exp, 2), op2_codes);
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for (i = 0; i < NUM_RTX_CODE; i++)
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codes[i] = TRISTATE_OR (TRISTATE_AND (op0_codes[i], op1_codes[i]),
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TRISTATE_AND (TRISTATE_NOT (op0_codes[i]),
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op2_codes[i]));
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break;
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case MATCH_CODE:
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/* MATCH_CODE allows a specified list of codes. However, if it
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does not apply to the top level of the expression, it does not
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constrain the set of codes for the top level. */
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if (XSTR (exp, 1)[0] != '\0')
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{
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memset (codes, Y, NUM_RTX_CODE);
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break;
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}
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memset (codes, N, NUM_RTX_CODE);
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{
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const char *next_code = XSTR (exp, 0);
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const char *code;
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if (*next_code == '\0')
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{
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error_with_line (pattern_lineno, "empty match_code expression");
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break;
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}
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while ((code = scan_comma_elt (&next_code)) != 0)
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{
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size_t n = next_code - code;
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int found_it = 0;
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for (i = 0; i < NUM_RTX_CODE; i++)
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if (!strncmp (code, GET_RTX_NAME (i), n)
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&& GET_RTX_NAME (i)[n] == '\0')
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{
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codes[i] = Y;
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found_it = 1;
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break;
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}
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if (!found_it)
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{
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error_with_line (pattern_lineno,
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"match_code \"%.*s\" matches nothing",
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(int) n, code);
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for (i = 0; i < NUM_RTX_CODE; i++)
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if (!strncasecmp (code, GET_RTX_NAME (i), n)
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&& GET_RTX_NAME (i)[n] == '\0'
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&& !did_you_mean_codes[i])
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{
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did_you_mean_codes[i] = 1;
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message_with_line (pattern_lineno, "(did you mean \"%s\"?)", GET_RTX_NAME (i));
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}
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}
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}
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}
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break;
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case MATCH_OPERAND:
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/* MATCH_OPERAND disallows the set of codes that the named predicate
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disallows, and is indeterminate for the codes that it does allow. */
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{
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struct pred_data *p = lookup_predicate (XSTR (exp, 1));
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if (!p)
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{
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error_with_line (pattern_lineno,
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"reference to unknown predicate '%s'",
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XSTR (exp, 1));
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break;
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}
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for (i = 0; i < NUM_RTX_CODE; i++)
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codes[i] = p->codes[i] ? I : N;
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}
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break;
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case MATCH_TEST:
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/* (match_test WHATEVER) is completely indeterminate. */
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memset (codes, I, NUM_RTX_CODE);
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break;
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default:
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error_with_line (pattern_lineno,
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"'%s' cannot be used in a define_predicate expression",
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GET_RTX_NAME (GET_CODE (exp)));
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memset (codes, I, NUM_RTX_CODE);
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break;
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}
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}
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#undef TRISTATE_OR
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#undef TRISTATE_AND
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#undef TRISTATE_NOT
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/* Process a define_predicate expression: compute the set of predicates
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that can be matched, and record this as a known predicate. */
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static void
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process_define_predicate (rtx desc)
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{
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struct pred_data *pred = XCNEW (struct pred_data);
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char codes[NUM_RTX_CODE];
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int i;
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pred->name = XSTR (desc, 0);
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if (GET_CODE (desc) == DEFINE_SPECIAL_PREDICATE)
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pred->special = 1;
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compute_predicate_codes (XEXP (desc, 1), codes);
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for (i = 0; i < NUM_RTX_CODE; i++)
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if (codes[i] != N)
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add_predicate_code (pred, (enum rtx_code) i);
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add_predicate (pred);
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}
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#undef I
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#undef N
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#undef Y
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static struct decision *new_decision
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(const char *, struct decision_head *);
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@ -2716,11 +2503,6 @@ main (int argc, char **argv)
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switch (GET_CODE (desc))
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{
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case DEFINE_PREDICATE:
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case DEFINE_SPECIAL_PREDICATE:
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process_define_predicate (desc);
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break;
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case DEFINE_INSN:
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h = make_insn_sequence (desc, RECOG);
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merge_trees (&recog_tree, &h);
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|
|
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244
gcc/gensupport.c
244
gcc/gensupport.c
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|
@ -109,6 +109,247 @@ gen_rtx_CONST_INT (enum machine_mode ARG_UNUSED (mode),
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return rt;
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}
|
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|
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/* Predicate handling.
|
||||
|
||||
We construct from the machine description a table mapping each
|
||||
predicate to a list of the rtl codes it can possibly match. The
|
||||
function 'maybe_both_true' uses it to deduce that there are no
|
||||
expressions that can be matches by certain pairs of tree nodes.
|
||||
Also, if a predicate can match only one code, we can hardwire that
|
||||
code into the node testing the predicate.
|
||||
|
||||
Some predicates are flagged as special. validate_pattern will not
|
||||
warn about modeless match_operand expressions if they have a
|
||||
special predicate. Predicates that allow only constants are also
|
||||
treated as special, for this purpose.
|
||||
|
||||
validate_pattern will warn about predicates that allow non-lvalues
|
||||
when they appear in destination operands.
|
||||
|
||||
Calculating the set of rtx codes that can possibly be accepted by a
|
||||
predicate expression EXP requires a three-state logic: any given
|
||||
subexpression may definitively accept a code C (Y), definitively
|
||||
reject a code C (N), or may have an indeterminate effect (I). N
|
||||
and I is N; Y or I is Y; Y and I, N or I are both I. Here are full
|
||||
truth tables.
|
||||
|
||||
a b a&b a|b
|
||||
Y Y Y Y
|
||||
N Y N Y
|
||||
N N N N
|
||||
I Y I Y
|
||||
I N N I
|
||||
I I I I
|
||||
|
||||
We represent Y with 1, N with 0, I with 2. If any code is left in
|
||||
an I state by the complete expression, we must assume that that
|
||||
code can be accepted. */
|
||||
|
||||
#define N 0
|
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#define Y 1
|
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#define I 2
|
||||
|
||||
#define TRISTATE_AND(a,b) \
|
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((a) == I ? ((b) == N ? N : I) : \
|
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(b) == I ? ((a) == N ? N : I) : \
|
||||
(a) && (b))
|
||||
|
||||
#define TRISTATE_OR(a,b) \
|
||||
((a) == I ? ((b) == Y ? Y : I) : \
|
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(b) == I ? ((a) == Y ? Y : I) : \
|
||||
(a) || (b))
|
||||
|
||||
#define TRISTATE_NOT(a) \
|
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((a) == I ? I : !(a))
|
||||
|
||||
/* 0 means no warning about that code yet, 1 means warned. */
|
||||
static char did_you_mean_codes[NUM_RTX_CODE];
|
||||
|
||||
/* Recursively calculate the set of rtx codes accepted by the
|
||||
predicate expression EXP, writing the result to CODES. LINENO is
|
||||
the line number on which the directive containing EXP appeared. */
|
||||
|
||||
static void
|
||||
compute_predicate_codes (rtx exp, int lineno, char codes[NUM_RTX_CODE])
|
||||
{
|
||||
char op0_codes[NUM_RTX_CODE];
|
||||
char op1_codes[NUM_RTX_CODE];
|
||||
char op2_codes[NUM_RTX_CODE];
|
||||
int i;
|
||||
|
||||
switch (GET_CODE (exp))
|
||||
{
|
||||
case AND:
|
||||
compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes);
|
||||
compute_predicate_codes (XEXP (exp, 1), lineno, op1_codes);
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
codes[i] = TRISTATE_AND (op0_codes[i], op1_codes[i]);
|
||||
break;
|
||||
|
||||
case IOR:
|
||||
compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes);
|
||||
compute_predicate_codes (XEXP (exp, 1), lineno, op1_codes);
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
codes[i] = TRISTATE_OR (op0_codes[i], op1_codes[i]);
|
||||
break;
|
||||
case NOT:
|
||||
compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes);
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
codes[i] = TRISTATE_NOT (op0_codes[i]);
|
||||
break;
|
||||
|
||||
case IF_THEN_ELSE:
|
||||
/* a ? b : c accepts the same codes as (a & b) | (!a & c). */
|
||||
compute_predicate_codes (XEXP (exp, 0), lineno, op0_codes);
|
||||
compute_predicate_codes (XEXP (exp, 1), lineno, op1_codes);
|
||||
compute_predicate_codes (XEXP (exp, 2), lineno, op2_codes);
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
codes[i] = TRISTATE_OR (TRISTATE_AND (op0_codes[i], op1_codes[i]),
|
||||
TRISTATE_AND (TRISTATE_NOT (op0_codes[i]),
|
||||
op2_codes[i]));
|
||||
break;
|
||||
|
||||
case MATCH_CODE:
|
||||
/* MATCH_CODE allows a specified list of codes. However, if it
|
||||
does not apply to the top level of the expression, it does not
|
||||
constrain the set of codes for the top level. */
|
||||
if (XSTR (exp, 1)[0] != '\0')
|
||||
{
|
||||
memset (codes, Y, NUM_RTX_CODE);
|
||||
break;
|
||||
}
|
||||
|
||||
memset (codes, N, NUM_RTX_CODE);
|
||||
{
|
||||
const char *next_code = XSTR (exp, 0);
|
||||
const char *code;
|
||||
|
||||
if (*next_code == '\0')
|
||||
{
|
||||
error_with_line (lineno, "empty match_code expression");
|
||||
break;
|
||||
}
|
||||
|
||||
while ((code = scan_comma_elt (&next_code)) != 0)
|
||||
{
|
||||
size_t n = next_code - code;
|
||||
int found_it = 0;
|
||||
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
if (!strncmp (code, GET_RTX_NAME (i), n)
|
||||
&& GET_RTX_NAME (i)[n] == '\0')
|
||||
{
|
||||
codes[i] = Y;
|
||||
found_it = 1;
|
||||
break;
|
||||
}
|
||||
if (!found_it)
|
||||
{
|
||||
error_with_line (lineno,
|
||||
"match_code \"%.*s\" matches nothing",
|
||||
(int) n, code);
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
if (!strncasecmp (code, GET_RTX_NAME (i), n)
|
||||
&& GET_RTX_NAME (i)[n] == '\0'
|
||||
&& !did_you_mean_codes[i])
|
||||
{
|
||||
did_you_mean_codes[i] = 1;
|
||||
message_with_line (lineno, "(did you mean \"%s\"?)",
|
||||
GET_RTX_NAME (i));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case MATCH_OPERAND:
|
||||
/* MATCH_OPERAND disallows the set of codes that the named predicate
|
||||
disallows, and is indeterminate for the codes that it does allow. */
|
||||
{
|
||||
struct pred_data *p = lookup_predicate (XSTR (exp, 1));
|
||||
if (!p)
|
||||
{
|
||||
error_with_line (lineno, "reference to unknown predicate '%s'",
|
||||
XSTR (exp, 1));
|
||||
break;
|
||||
}
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
codes[i] = p->codes[i] ? I : N;
|
||||
}
|
||||
break;
|
||||
|
||||
|
||||
case MATCH_TEST:
|
||||
/* (match_test WHATEVER) is completely indeterminate. */
|
||||
memset (codes, I, NUM_RTX_CODE);
|
||||
break;
|
||||
|
||||
default:
|
||||
error_with_line (lineno,
|
||||
"'%s' cannot be used in a define_predicate expression",
|
||||
GET_RTX_NAME (GET_CODE (exp)));
|
||||
memset (codes, I, NUM_RTX_CODE);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
#undef TRISTATE_OR
|
||||
#undef TRISTATE_AND
|
||||
#undef TRISTATE_NOT
|
||||
|
||||
/* Return true if NAME is a valid predicate name. */
|
||||
|
||||
static bool
|
||||
valid_predicate_name_p (const char *name)
|
||||
{
|
||||
const char *p;
|
||||
|
||||
if (!ISALPHA (name[0]) && name[0] != '_')
|
||||
return false;
|
||||
for (p = name + 1; *p; p++)
|
||||
if (!ISALNUM (*p) && *p != '_')
|
||||
return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Process define_predicate directive DESC, which appears on line number
|
||||
LINENO. Compute the set of codes that can be matched, and record this
|
||||
as a known predicate. */
|
||||
|
||||
static void
|
||||
process_define_predicate (rtx desc, int lineno)
|
||||
{
|
||||
struct pred_data *pred;
|
||||
char codes[NUM_RTX_CODE];
|
||||
int i;
|
||||
|
||||
if (!valid_predicate_name_p (XSTR (desc, 0)))
|
||||
{
|
||||
error_with_line (lineno,
|
||||
"%s: predicate name must be a valid C function name",
|
||||
XSTR (desc, 0));
|
||||
return;
|
||||
}
|
||||
|
||||
pred = XCNEW (struct pred_data);
|
||||
pred->name = XSTR (desc, 0);
|
||||
pred->exp = XEXP (desc, 1);
|
||||
pred->c_block = XSTR (desc, 2);
|
||||
if (GET_CODE (desc) == DEFINE_SPECIAL_PREDICATE)
|
||||
pred->special = true;
|
||||
|
||||
compute_predicate_codes (XEXP (desc, 1), lineno, codes);
|
||||
|
||||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||||
if (codes[i] != N)
|
||||
add_predicate_code (pred, (enum rtx_code) i);
|
||||
|
||||
add_predicate (pred);
|
||||
}
|
||||
#undef I
|
||||
#undef N
|
||||
#undef Y
|
||||
|
||||
/* Queue PATTERN on LIST_TAIL. Return the address of the new queue
|
||||
element. */
|
||||
|
||||
|
|
@ -182,6 +423,9 @@ process_rtx (rtx desc, int lineno)
|
|||
|
||||
case DEFINE_PREDICATE:
|
||||
case DEFINE_SPECIAL_PREDICATE:
|
||||
process_define_predicate (desc, lineno);
|
||||
/* Fall through. */
|
||||
|
||||
case DEFINE_CONSTRAINT:
|
||||
case DEFINE_REGISTER_CONSTRAINT:
|
||||
case DEFINE_MEMORY_CONSTRAINT:
|
||||
|
|
|
|||
Loading…
Reference in New Issue