/* Generate code from machine description to recognize rtl as insns.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
License for more details.
You should have received a copy of the GNU General Public License
- along with GCC; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
/* This program is used to produce insn-recog.c, which contains a
#include "tm.h"
#include "rtl.h"
#include "errors.h"
+#include "read-md.h"
#include "gensupport.h"
-
#define OUTPUT_LABEL(INDENT_STRING, LABEL_NUMBER) \
printf("%sL%d: ATTRIBUTE_UNUSED_LABEL\n", (INDENT_STRING), (LABEL_NUMBER))
-/* Holds an array of names indexed by insn_code_number. */
-static char **insn_name_ptr = 0;
-static int insn_name_ptr_size = 0;
+/* Ways of obtaining an rtx to be tested. */
+enum position_type {
+ /* PATTERN (peep2_next_insn (ARG)). */
+ POS_PEEP2_INSN,
+
+ /* XEXP (BASE, ARG). */
+ POS_XEXP,
+
+ /* XVECEXP (BASE, 0, ARG). */
+ POS_XVECEXP0
+};
+
+/* The position of an rtx relative to X0. Each useful position is
+ represented by exactly one instance of this structure. */
+struct position
+{
+ /* The parent rtx. This is the root position for POS_PEEP2_INSNs. */
+ struct position *base;
+
+ /* A position with the same BASE and TYPE, but with the next value
+ of ARG. */
+ struct position *next;
+
+ /* A list of all POS_XEXP positions that use this one as their base,
+ chained by NEXT fields. The first entry represents XEXP (this, 0),
+ the second represents XEXP (this, 1), and so on. */
+ struct position *xexps;
+
+ /* A list of POS_XVECEXP0 positions that use this one as their base,
+ chained by NEXT fields. The first entry represents XVECEXP (this, 0, 0),
+ the second represents XVECEXP (this, 0, 1), and so on. */
+ struct position *xvecexp0s;
+
+ /* The type of position. */
+ enum position_type type;
+
+ /* The argument to TYPE (shown as ARG in the position_type comments). */
+ int arg;
+
+ /* The depth of this position, with 0 as the root. */
+ int depth;
+};
/* A listhead of decision trees. The alternatives to a node are kept
in a doubly-linked list so we can easily add nodes to the proper
struct decision *last;
};
+/* These types are roughly in the order in which we'd like to test them. */
+enum decision_type
+{
+ DT_num_insns,
+ DT_mode, DT_code, DT_veclen,
+ DT_elt_zero_int, DT_elt_one_int, DT_elt_zero_wide, DT_elt_zero_wide_safe,
+ DT_const_int,
+ DT_veclen_ge, DT_dup, DT_pred, DT_c_test,
+ DT_accept_op, DT_accept_insn
+};
+
/* A single test. The two accept types aren't tests per-se, but
their equality (or lack thereof) does affect tree merging so
it is convenient to keep them here. */
/* A linked list through the tests attached to a node. */
struct decision_test *next;
- /* These types are roughly in the order in which we'd like to test them. */
- enum decision_type
- {
- DT_mode, DT_code, DT_veclen,
- DT_elt_zero_int, DT_elt_one_int, DT_elt_zero_wide, DT_elt_zero_wide_safe,
- DT_veclen_ge, DT_dup, DT_pred, DT_c_test,
- DT_accept_op, DT_accept_insn
- } type;
+ enum decision_type type;
union
{
+ int num_insns; /* Number if insn in a define_peephole2. */
enum machine_mode mode; /* Machine mode of node. */
RTX_CODE code; /* Code to test. */
struct
{
const char *name; /* Predicate to call. */
- int index; /* Index into `preds' or -1. */
+ const struct pred_data *data;
+ /* Optimization hints for this predicate. */
enum machine_mode mode; /* Machine mode for node. */
} pred;
struct decision *afterward; /* Node to test on success,
but failure of successor nodes. */
- const char *position; /* String denoting position in pattern. */
+ struct position *position; /* Position in pattern. */
struct decision_test *tests; /* The tests for this node. */
static int next_insn_code;
-/* Similar, but counts all expressions in the MD file; used for
- error messages. */
-
-static int next_index;
-
/* Record the highest depth we ever have so we know how many variables to
allocate in each subroutine we make. */
/* The line number of the start of the pattern currently being processed. */
static int pattern_lineno;
-/* Count of errors. */
-static int error_count;
-\f
-/* This table contains a list of the rtl codes that can possibly match a
- predicate defined in recog.c. 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. */
+/* The root position (x0). */
+static struct position root_pos;
-static const struct pred_table
+/* A list of all POS_PEEP2_INSNs. The entry for insn 0 is the root position,
+ since we are given that instruction's pattern as x0. */
+static struct position *peep2_insn_pos_list = &root_pos;
+\f
+extern void debug_decision
+ (struct decision *);
+extern void debug_decision_list
+ (struct decision *);
+\f
+/* Return a position with the given BASE, TYPE and ARG. NEXT_PTR
+ points to where the unique object that represents the position
+ should be stored. Create the object if it doesn't already exist,
+ otherwise reuse the object that is already there. */
+
+static struct position *
+next_position (struct position **next_ptr, struct position *base,
+ enum position_type type, int arg)
{
- const char *const name;
- const RTX_CODE codes[NUM_RTX_CODE];
-} preds[] = {
- {"general_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
- LABEL_REF, SUBREG, REG, MEM, ADDRESSOF}},
-#ifdef PREDICATE_CODES
- PREDICATE_CODES
-#endif
- {"address_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
- LABEL_REF, SUBREG, REG, MEM, ADDRESSOF,
- PLUS, MINUS, MULT}},
- {"register_operand", {SUBREG, REG, ADDRESSOF}},
- {"pmode_register_operand", {SUBREG, REG, ADDRESSOF}},
- {"scratch_operand", {SCRATCH, REG}},
- {"immediate_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
- LABEL_REF}},
- {"const_int_operand", {CONST_INT}},
- {"const_double_operand", {CONST_INT, CONST_DOUBLE}},
- {"nonimmediate_operand", {SUBREG, REG, MEM, ADDRESSOF}},
- {"nonmemory_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
- LABEL_REF, SUBREG, REG, ADDRESSOF}},
- {"push_operand", {MEM}},
- {"pop_operand", {MEM}},
- {"memory_operand", {SUBREG, MEM}},
- {"indirect_operand", {SUBREG, MEM}},
- {"comparison_operator", {EQ, NE, LE, LT, GE, GT, LEU, LTU, GEU, GTU,
- UNORDERED, ORDERED, UNEQ, UNGE, UNGT, UNLE,
- UNLT, LTGT}},
- {"mode_independent_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,
- LABEL_REF, SUBREG, REG, MEM, ADDRESSOF}}
-};
+ struct position *pos;
-#define NUM_KNOWN_PREDS ARRAY_SIZE (preds)
+ pos = *next_ptr;
+ if (!pos)
+ {
+ pos = XCNEW (struct position);
+ pos->base = base;
+ pos->type = type;
+ pos->arg = arg;
+ pos->depth = base->depth + 1;
+ *next_ptr = pos;
+ }
+ return pos;
+}
-static const char *const special_mode_pred_table[] = {
-#ifdef SPECIAL_MODE_PREDICATES
- SPECIAL_MODE_PREDICATES
-#endif
- "pmode_register_operand"
-};
+/* Compare positions POS1 and POS2 lexicographically. */
+
+static int
+compare_positions (struct position *pos1, struct position *pos2)
+{
+ int diff;
+
+ diff = pos1->depth - pos2->depth;
+ if (diff < 0)
+ do
+ pos2 = pos2->base;
+ while (pos1->depth != pos2->depth);
+ else if (diff > 0)
+ do
+ pos1 = pos1->base;
+ while (pos1->depth != pos2->depth);
+ while (pos1 != pos2)
+ {
+ diff = (int) pos1->type - (int) pos2->type;
+ if (diff == 0)
+ diff = pos1->arg - pos2->arg;
+ pos1 = pos1->base;
+ pos2 = pos2->base;
+ }
+ return diff;
+}
-#define NUM_SPECIAL_MODE_PREDS ARRAY_SIZE (special_mode_pred_table)
-
-static struct decision *new_decision
- PARAMS ((const char *, struct decision_head *));
-static struct decision_test *new_decision_test
- PARAMS ((enum decision_type, struct decision_test ***));
-static rtx find_operand
- PARAMS ((rtx, int));
-static rtx find_matching_operand
- PARAMS ((rtx, int));
-static void validate_pattern
- PARAMS ((rtx, rtx, rtx, int));
-static struct decision *add_to_sequence
- PARAMS ((rtx, struct decision_head *, const char *, enum routine_type, int));
-
-static int maybe_both_true_2
- PARAMS ((struct decision_test *, struct decision_test *));
-static int maybe_both_true_1
- PARAMS ((struct decision_test *, struct decision_test *));
-static int maybe_both_true
- PARAMS ((struct decision *, struct decision *, int));
-
-static int nodes_identical_1
- PARAMS ((struct decision_test *, struct decision_test *));
-static int nodes_identical
- PARAMS ((struct decision *, struct decision *));
-static void merge_accept_insn
- PARAMS ((struct decision *, struct decision *));
-static void merge_trees
- PARAMS ((struct decision_head *, struct decision_head *));
-
-static void factor_tests
- PARAMS ((struct decision_head *));
-static void simplify_tests
- PARAMS ((struct decision_head *));
-static int break_out_subroutines
- PARAMS ((struct decision_head *, int));
-static void find_afterward
- PARAMS ((struct decision_head *, struct decision *));
-
-static void change_state
- PARAMS ((const char *, const char *, struct decision *, const char *));
-static void print_code
- PARAMS ((enum rtx_code));
-static void write_afterward
- PARAMS ((struct decision *, struct decision *, const char *));
-static struct decision *write_switch
- PARAMS ((struct decision *, int));
-static void write_cond
- PARAMS ((struct decision_test *, int, enum routine_type));
-static void write_action
- PARAMS ((struct decision *, struct decision_test *, int, int,
- struct decision *, enum routine_type));
-static int is_unconditional
- PARAMS ((struct decision_test *, enum routine_type));
-static int write_node
- PARAMS ((struct decision *, int, enum routine_type));
-static void write_tree_1
- PARAMS ((struct decision_head *, int, enum routine_type));
-static void write_tree
- PARAMS ((struct decision_head *, const char *, enum routine_type, int));
-static void write_subroutine
- PARAMS ((struct decision_head *, enum routine_type));
-static void write_subroutines
- PARAMS ((struct decision_head *, enum routine_type));
-static void write_header
- PARAMS ((void));
-
-static struct decision_head make_insn_sequence
- PARAMS ((rtx, enum routine_type));
-static void process_tree
- PARAMS ((struct decision_head *, enum routine_type));
-
-static void record_insn_name
- PARAMS ((int, const char *));
-
-static void debug_decision_0
- PARAMS ((struct decision *, int, int));
-static void debug_decision_1
- PARAMS ((struct decision *, int));
-static void debug_decision_2
- PARAMS ((struct decision_test *));
-extern void debug_decision
- PARAMS ((struct decision *));
-extern void debug_decision_list
- PARAMS ((struct decision *));
-\f
/* Create a new node in sequence after LAST. */
static struct decision *
-new_decision (position, last)
- const char *position;
- struct decision_head *last;
+new_decision (struct position *pos, struct decision_head *last)
{
- struct decision *new
- = (struct decision *) xmalloc (sizeof (struct decision));
+ struct decision *new_decision = XCNEW (struct decision);
- memset (new, 0, sizeof (*new));
- new->success = *last;
- new->position = xstrdup (position);
- new->number = next_number++;
+ new_decision->success = *last;
+ new_decision->position = pos;
+ new_decision->number = next_number++;
- last->first = last->last = new;
- return new;
+ last->first = last->last = new_decision;
+ return new_decision;
}
/* Create a new test and link it in at PLACE. */
static struct decision_test *
-new_decision_test (type, pplace)
- enum decision_type type;
- struct decision_test ***pplace;
+new_decision_test (enum decision_type type, struct decision_test ***pplace)
{
struct decision_test **place = *pplace;
struct decision_test *test;
- test = (struct decision_test *) xmalloc (sizeof (*test));
+ test = XNEW (struct decision_test);
test->next = *place;
test->type = type;
*place = test;
return test;
}
-/* Search for and return operand N. */
+/* Search for and return operand N, stop when reaching node STOP. */
static rtx
-find_operand (pattern, n)
- rtx pattern;
- int n;
+find_operand (rtx pattern, int n, rtx stop)
{
const char *fmt;
RTX_CODE code;
int i, j, len;
rtx r;
+ if (pattern == stop)
+ return stop;
+
code = GET_CODE (pattern);
if ((code == MATCH_SCRATCH
- || code == MATCH_INSN
|| code == MATCH_OPERAND
|| code == MATCH_OPERATOR
|| code == MATCH_PARALLEL)
switch (fmt[i])
{
case 'e': case 'u':
- if ((r = find_operand (XEXP (pattern, i), n)) != NULL_RTX)
+ if ((r = find_operand (XEXP (pattern, i), n, stop)) != NULL_RTX)
return r;
break;
case 'V':
if (! XVEC (pattern, i))
break;
- /* FALLTHRU */
+ /* Fall through. */
case 'E':
for (j = 0; j < XVECLEN (pattern, i); j++)
- if ((r = find_operand (XVECEXP (pattern, i, j), n)) != NULL_RTX)
+ if ((r = find_operand (XVECEXP (pattern, i, j), n, stop))
+ != NULL_RTX)
return r;
break;
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
constraint for operand N. */
static rtx
-find_matching_operand (pattern, n)
- rtx pattern;
- int n;
+find_matching_operand (rtx pattern, int n)
{
const char *fmt;
RTX_CODE code;
case 'V':
if (! XVEC (pattern, i))
break;
- /* FALLTHRU */
+ /* Fall through. */
case 'E':
for (j = 0; j < XVECLEN (pattern, i); j++)
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
'+' within a context that requires in-out constraints. */
static void
-validate_pattern (pattern, insn, set, set_code)
- rtx pattern;
- rtx insn;
- rtx set;
- int set_code;
+validate_pattern (rtx pattern, rtx insn, rtx set, int set_code)
{
const char *fmt;
RTX_CODE code;
{
case MATCH_SCRATCH:
return;
-
- case MATCH_INSN:
+ case MATCH_DUP:
+ case MATCH_OP_DUP:
+ case MATCH_PAR_DUP:
+ if (find_operand (insn, XINT (pattern, 0), pattern) == pattern)
+ error_with_line (pattern_lineno,
+ "operand %i duplicated before defined",
+ XINT (pattern, 0));
+ break;
case MATCH_OPERAND:
case MATCH_OPERATOR:
{
const char *pred_name = XSTR (pattern, 1);
- int allows_non_lvalue = 1, allows_non_const = 1;
- int special_mode_pred = 0;
+ const struct pred_data *pred;
const char *c_test;
if (GET_CODE (insn) == DEFINE_INSN)
if (pred_name[0] != 0)
{
- for (i = 0; i < NUM_KNOWN_PREDS; i++)
- if (! strcmp (preds[i].name, pred_name))
- break;
-
- if (i < NUM_KNOWN_PREDS)
- {
- int j;
-
- allows_non_lvalue = allows_non_const = 0;
- for (j = 0; preds[i].codes[j] != 0; j++)
- {
- RTX_CODE c = preds[i].codes[j];
- if (c != LABEL_REF
- && c != SYMBOL_REF
- && c != CONST_INT
- && c != CONST_DOUBLE
- && c != CONST
- && c != HIGH
- && c != CONSTANT_P_RTX)
- allows_non_const = 1;
-
- if (c != REG
- && c != SUBREG
- && c != MEM
- && c != ADDRESSOF
- && c != CONCAT
- && c != PARALLEL
- && c != STRICT_LOW_PART)
- allows_non_lvalue = 1;
- }
- }
- else
- {
-#ifdef PREDICATE_CODES
- /* If the port has a list of the predicates it uses but
- omits one, warn. */
- message_with_line (pattern_lineno,
- "warning: `%s' not in PREDICATE_CODES",
- pred_name);
-#endif
- }
-
- for (i = 0; i < NUM_SPECIAL_MODE_PREDS; ++i)
- if (strcmp (pred_name, special_mode_pred_table[i]) == 0)
- {
- special_mode_pred = 1;
- break;
- }
+ pred = lookup_predicate (pred_name);
+ if (!pred)
+ message_with_line (pattern_lineno,
+ "warning: unknown predicate '%s'",
+ pred_name);
}
+ else
+ pred = 0;
if (code == MATCH_OPERAND)
{
const char constraints0 = XSTR (pattern, 2)[0];
- /* In DEFINE_EXPAND, DEFINE_SPLIT, and DEFINE_PEEPHOLE2, we
+ /* In DEFINE_EXPAND, DEFINE_SPLIT, and DEFINE_PEEPHOLE2, we
don't use the MATCH_OPERAND constraint, only the predicate.
This is confusing to folks doing new ports, so help them
not make the mistake. */
"warning: constraints not supported in %s",
rtx_name[GET_CODE (insn)]);
}
-
+
/* A MATCH_OPERAND that is a SET should have an output reload. */
else if (set && constraints0)
{
&& find_matching_operand (insn, XINT (pattern, 0)))
;
else
- {
- message_with_line (pattern_lineno,
- "operand %d missing in-out reload",
- XINT (pattern, 0));
- error_count++;
- }
- }
- else if (constraints0 != '=' && constraints0 != '+')
- {
- message_with_line (pattern_lineno,
- "operand %d missing output reload",
+ error_with_line (pattern_lineno,
+ "operand %d missing in-out reload",
XINT (pattern, 0));
- error_count++;
}
+ else if (constraints0 != '=' && constraints0 != '+')
+ error_with_line (pattern_lineno,
+ "operand %d missing output reload",
+ XINT (pattern, 0));
}
}
/* Allowing non-lvalues in destinations -- particularly CONST_INT --
while not likely to occur at runtime, results in less efficient
code from insn-recog.c. */
- if (set
- && pred_name[0] != '\0'
- && allows_non_lvalue)
- {
- message_with_line (pattern_lineno,
- "warning: destination operand %d allows non-lvalue",
- XINT (pattern, 0));
- }
-
- /* A modeless MATCH_OPERAND can be handy when we can
- check for multiple modes in the c_test. In most other cases,
- it is a mistake. Only DEFINE_INSN is eligible, since SPLIT
- and PEEP2 can FAIL within the output pattern. Exclude
- address_operand, since its mode is related to the mode of
- the memory not the operand. Exclude the SET_DEST of a call
- instruction, as that is a common idiom. */
+ if (set && pred && pred->allows_non_lvalue)
+ message_with_line (pattern_lineno,
+ "warning: destination operand %d "
+ "allows non-lvalue",
+ XINT (pattern, 0));
+
+ /* A modeless MATCH_OPERAND can be handy when we can check for
+ multiple modes in the c_test. In most other cases, it is a
+ mistake. Only DEFINE_INSN is eligible, since SPLIT and
+ PEEP2 can FAIL within the output pattern. Exclude special
+ predicates, which check the mode themselves. Also exclude
+ predicates that allow only constants. Exclude the SET_DEST
+ of a call instruction, as that is a common idiom. */
if (GET_MODE (pattern) == VOIDmode
&& code == MATCH_OPERAND
&& GET_CODE (insn) == DEFINE_INSN
- && allows_non_const
- && ! special_mode_pred
- && pred_name[0] != '\0'
- && strcmp (pred_name, "address_operand") != 0
+ && pred
+ && !pred->special
+ && pred->allows_non_const
&& strstr (c_test, "operands") == NULL
&& ! (set
&& GET_CODE (set) == SET
&& GET_CODE (SET_SRC (set)) == CALL))
- {
- message_with_line (pattern_lineno,
- "warning: operand %d missing mode?",
- XINT (pattern, 0));
- }
+ message_with_line (pattern_lineno,
+ "warning: operand %d missing mode?",
+ XINT (pattern, 0));
return;
}
if (GET_CODE (dest) == STRICT_LOW_PART)
dest = XEXP (dest, 0);
- /* Find the referant for a DUP. */
+ /* Find the referent for a DUP. */
if (GET_CODE (dest) == MATCH_DUP
|| GET_CODE (dest) == MATCH_OP_DUP
|| GET_CODE (dest) == MATCH_PAR_DUP)
- dest = find_operand (insn, XINT (dest, 0));
+ dest = find_operand (insn, XINT (dest, 0), NULL);
if (GET_CODE (src) == MATCH_DUP
|| GET_CODE (src) == MATCH_OP_DUP
|| GET_CODE (src) == MATCH_PAR_DUP)
- src = find_operand (insn, XINT (src, 0));
+ src = find_operand (insn, XINT (src, 0), NULL);
dmode = GET_MODE (dest);
smode = GET_MODE (src);
/* The operands of a SET must have the same mode unless one
is VOIDmode. */
else if (dmode != VOIDmode && smode != VOIDmode && dmode != smode)
- {
- message_with_line (pattern_lineno,
- "mode mismatch in set: %smode vs %smode",
- GET_MODE_NAME (dmode), GET_MODE_NAME (smode));
- error_count++;
- }
+ error_with_line (pattern_lineno,
+ "mode mismatch in set: %smode vs %smode",
+ GET_MODE_NAME (dmode), GET_MODE_NAME (smode));
/* If only one of the operands is VOIDmode, and PC or CC0 is
not involved, it's probably a mistake. */
&& GET_CODE (dest) != CC0
&& GET_CODE (src) != PC
&& GET_CODE (src) != CC0
- && GET_CODE (src) != CONST_INT)
+ && !CONST_INT_P (src)
+ && GET_CODE (src) != CALL)
{
const char *which;
which = (dmode == VOIDmode ? "destination" : "source");
case LABEL_REF:
if (GET_MODE (XEXP (pattern, 0)) != VOIDmode)
- {
- message_with_line (pattern_lineno,
- "operand to label_ref %smode not VOIDmode",
- GET_MODE_NAME (GET_MODE (XEXP (pattern, 0))));
- error_count++;
- }
+ error_with_line (pattern_lineno,
+ "operand to label_ref %smode not VOIDmode",
+ GET_MODE_NAME (GET_MODE (XEXP (pattern, 0))));
break;
default:
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
}
LAST is a pointer to the listhead in the previous node in the chain (or
in the calling function, for the first node).
- POSITION is the string representing the current position in the insn.
+ POSITION is the current position in the insn.
INSN_TYPE is the type of insn for which we are emitting code.
A pointer to the final node in the chain is returned. */
static struct decision *
-add_to_sequence (pattern, last, position, insn_type, top)
- rtx pattern;
- struct decision_head *last;
- const char *position;
- enum routine_type insn_type;
- int top;
+add_to_sequence (rtx pattern, struct decision_head *last,
+ struct position *pos, enum routine_type insn_type, int top)
{
RTX_CODE code;
- struct decision *this, *sub;
+ struct decision *this_decision, *sub;
struct decision_test *test;
struct decision_test **place;
- char *subpos;
+ struct position *subpos, **subpos_ptr;
size_t i;
const char *fmt;
- int depth = strlen (position);
int len;
enum machine_mode mode;
+ enum position_type pos_type;
- if (depth > max_depth)
- max_depth = depth;
-
- subpos = (char *) xmalloc (depth + 2);
- strcpy (subpos, position);
- subpos[depth + 1] = 0;
+ if (pos->depth > max_depth)
+ max_depth = pos->depth;
- sub = this = new_decision (position, last);
- place = &this->tests;
+ sub = this_decision = new_decision (pos, last);
+ place = &this_decision->tests;
restart:
mode = GET_MODE (pattern);
/* Toplevel peephole pattern. */
if (insn_type == PEEPHOLE2 && top)
{
- /* We don't need the node we just created -- unlink it. */
- last->first = last->last = NULL;
+ int num_insns;
- for (i = 0; i < (size_t) XVECLEN (pattern, 0); i++)
+ /* Check we have sufficient insns. This avoids complications
+ because we then know peep2_next_insn never fails. */
+ num_insns = XVECLEN (pattern, 0);
+ if (num_insns > 1)
{
- /* Which insn we're looking at is represented by A-Z. We don't
- ever use 'A', however; it is always implied. */
+ test = new_decision_test (DT_num_insns, &place);
+ test->u.num_insns = num_insns;
+ last = &sub->success;
+ }
+ else
+ {
+ /* We don't need the node we just created -- unlink it. */
+ last->first = last->last = NULL;
+ }
- subpos[depth] = (i > 0 ? 'A' + i : 0);
+ subpos_ptr = &peep2_insn_pos_list;
+ for (i = 0; i < (size_t) XVECLEN (pattern, 0); i++)
+ {
+ subpos = next_position (subpos_ptr, &root_pos,
+ POS_PEEP2_INSN, i);
sub = add_to_sequence (XVECEXP (pattern, 0, i),
last, subpos, insn_type, 0);
last = &sub->success;
+ subpos_ptr = &subpos->next;
}
goto ret;
}
beyond the end of the vector. */
test = new_decision_test (DT_veclen_ge, &place);
test->u.veclen = XVECLEN (pattern, 2);
- /* FALLTHRU */
+ /* Fall through. */
case MATCH_OPERAND:
case MATCH_SCRATCH:
case MATCH_OPERATOR:
- case MATCH_INSN:
{
- const char *pred_name;
RTX_CODE was_code = code;
- int allows_const_int = 1;
+ const char *pred_name;
+ bool allows_const_int = true;
if (code == MATCH_SCRATCH)
{
if (pred_name[0] != 0)
{
+ const struct pred_data *pred;
+
test = new_decision_test (DT_pred, &place);
test->u.pred.name = pred_name;
test->u.pred.mode = mode;
- /* See if we know about this predicate and save its number.
- If we do, and it only accepts one code, note that fact.
-
- If we know that the predicate does not allow CONST_INT,
- we know that the only way the predicate can match is if
- the modes match (here we use the kludge of relying on the
- fact that "address_operand" accepts CONST_INT; otherwise,
- it would have to be a special case), so we can test the
- mode (but we need not). This fact should considerably
- simplify the generated code. */
+ /* See if we know about this predicate.
+ If we do, remember it for use below.
- for (i = 0; i < NUM_KNOWN_PREDS; i++)
- if (! strcmp (preds[i].name, pred_name))
- break;
-
- if (i < NUM_KNOWN_PREDS)
+ We can optimize the generated code a little if either
+ (a) the predicate only accepts one code, or (b) the
+ predicate does not allow CONST_INT, in which case it
+ can match only if the modes match. */
+ pred = lookup_predicate (pred_name);
+ if (pred)
{
- int j;
-
- test->u.pred.index = i;
-
- if (preds[i].codes[1] == 0 && code == UNKNOWN)
- code = preds[i].codes[0];
-
- allows_const_int = 0;
- for (j = 0; preds[i].codes[j] != 0; j++)
- if (preds[i].codes[j] == CONST_INT)
- {
- allows_const_int = 1;
- break;
- }
+ test->u.pred.data = pred;
+ allows_const_int = pred->codes[CONST_INT];
+ if (was_code == MATCH_PARALLEL
+ && pred->singleton != PARALLEL)
+ message_with_line (pattern_lineno,
+ "predicate '%s' used in match_parallel "
+ "does not allow only PARALLEL", pred->name);
+ else
+ code = pred->singleton;
}
else
- test->u.pred.index = -1;
+ message_with_line (pattern_lineno,
+ "warning: unknown predicate '%s' in '%s' expression",
+ pred_name, GET_RTX_NAME (was_code));
}
/* Can't enforce a mode if we allow const_int. */
if (allows_const_int)
mode = VOIDmode;
- /* Accept the operand, ie. record it in `operands'. */
+ /* Accept the operand, i.e. record it in `operands'. */
test = new_decision_test (DT_accept_op, &place);
test->u.opno = XINT (pattern, 0);
if (was_code == MATCH_OPERATOR || was_code == MATCH_PARALLEL)
{
- char base = (was_code == MATCH_OPERATOR ? '0' : 'a');
+ if (was_code == MATCH_OPERATOR)
+ {
+ pos_type = POS_XEXP;
+ subpos_ptr = &pos->xexps;
+ }
+ else
+ {
+ pos_type = POS_XVECEXP0;
+ subpos_ptr = &pos->xvecexp0s;
+ }
for (i = 0; i < (size_t) XVECLEN (pattern, 2); i++)
{
- subpos[depth] = i + base;
+ subpos = next_position (subpos_ptr, pos, pos_type, i);
sub = add_to_sequence (XVECEXP (pattern, 2, i),
&sub->success, subpos, insn_type, 0);
+ subpos_ptr = &subpos->next;
}
}
goto fini;
test = new_decision_test (DT_accept_op, &place);
test->u.opno = XINT (pattern, 0);
+ subpos_ptr = &pos->xexps;
for (i = 0; i < (size_t) XVECLEN (pattern, 1); i++)
{
- subpos[depth] = i + '0';
+ subpos = next_position (subpos_ptr, pos, POS_XEXP, i);
sub = add_to_sequence (XVECEXP (pattern, 1, i),
&sub->success, subpos, insn_type, 0);
+ subpos_ptr = &subpos->next;
}
goto fini;
{
if (fmt[i] == 'i')
{
- if (i == 0)
+ gcc_assert (i < 2);
+
+ if (!i)
{
test = new_decision_test (DT_elt_zero_int, &place);
test->u.intval = XINT (pattern, i);
}
- else if (i == 1)
+ else
{
test = new_decision_test (DT_elt_one_int, &place);
test->u.intval = XINT (pattern, i);
}
- else
- abort ();
}
else if (fmt[i] == 'w')
{
= ((int) XWINT (pattern, i) == XWINT (pattern, i))
? DT_elt_zero_wide_safe : DT_elt_zero_wide;
- if (i != 0)
- abort ();
+ gcc_assert (!i);
test = new_decision_test (type, &place);
test->u.intval = XWINT (pattern, i);
}
else if (fmt[i] == 'E')
{
- if (i != 0)
- abort ();
+ gcc_assert (!i);
test = new_decision_test (DT_veclen, &place);
test->u.veclen = XVECLEN (pattern, i);
}
/* Now test our sub-patterns. */
+ subpos_ptr = &pos->xexps;
for (i = 0; i < (size_t) len; i++)
{
+ subpos = next_position (subpos_ptr, pos, POS_XEXP, i);
switch (fmt[i])
{
case 'e': case 'u':
- subpos[depth] = '0' + i;
sub = add_to_sequence (XEXP (pattern, i), &sub->success,
subpos, insn_type, 0);
break;
case 'E':
{
+ struct position *subpos2, **subpos2_ptr;
int j;
+
+ subpos2_ptr = &pos->xvecexp0s;
for (j = 0; j < XVECLEN (pattern, i); j++)
{
- subpos[depth] = 'a' + j;
+ subpos2 = next_position (subpos2_ptr, pos, POS_XVECEXP0, j);
sub = add_to_sequence (XVECEXP (pattern, i, j),
- &sub->success, subpos, insn_type, 0);
+ &sub->success, subpos2, insn_type, 0);
+ subpos2_ptr = &subpos2->next;
}
break;
}
break;
default:
- abort ();
+ gcc_unreachable ();
}
+ subpos_ptr = &subpos->next;
}
fini:
before any of the nodes we may have added above. */
if (code != UNKNOWN)
{
- place = &this->tests;
+ place = &this_decision->tests;
test = new_decision_test (DT_code, &place);
test->u.code = code;
}
if (mode != VOIDmode)
{
- place = &this->tests;
+ place = &this_decision->tests;
test = new_decision_test (DT_mode, &place);
test->u.mode = mode;
}
/* If we didn't insert any tests or accept nodes, hork. */
- if (this->tests == NULL)
- abort ();
+ gcc_assert (this_decision->tests);
ret:
- free (subpos);
return sub;
}
\f
Returns > 0 for "definitely both true" and < 0 for "maybe both true". */
static int
-maybe_both_true_2 (d1, d2)
- struct decision_test *d1, *d2;
+maybe_both_true_2 (struct decision_test *d1, struct decision_test *d2)
{
if (d1->type == d2->type)
{
switch (d1->type)
{
+ case DT_num_insns:
+ if (d1->u.num_insns == d2->u.num_insns)
+ return 1;
+ else
+ return -1;
+
case DT_mode:
return d1->u.mode == d2->u.mode;
separate DT_mode that will make maybe_both_true_1 return 0. */
}
- if (d1->u.pred.index >= 0)
+ if (d1->u.pred.data)
{
/* If D2 tests a code, see if it is in the list of valid
codes for D1's predicate. */
if (d2->type == DT_code)
{
- const RTX_CODE *c = &preds[d1->u.pred.index].codes[0];
- while (*c != 0)
- {
- if (*c == d2->u.code)
- break;
- ++c;
- }
- if (*c == 0)
+ if (!d1->u.pred.data->codes[d2->u.code])
return 0;
}
/* Otherwise see if the predicates have any codes in common. */
- else if (d2->type == DT_pred && d2->u.pred.index >= 0)
+ else if (d2->type == DT_pred && d2->u.pred.data)
{
- const RTX_CODE *c1 = &preds[d1->u.pred.index].codes[0];
- int common = 0;
+ bool common = false;
+ int c;
- while (*c1 != 0 && !common)
- {
- const RTX_CODE *c2 = &preds[d2->u.pred.index].codes[0];
- while (*c2 != 0 && !common)
- {
- common = (*c1 == *c2);
- ++c2;
- }
- ++c1;
- }
+ for (c = 0; c < NUM_RTX_CODE; c++)
+ if (d1->u.pred.data->codes[c] && d2->u.pred.data->codes[c])
+ {
+ common = true;
+ break;
+ }
if (!common)
return 0;
Returns > 0 for "definitely both true" and < 0 for "maybe both true". */
static int
-maybe_both_true_1 (d1, d2)
- struct decision_test *d1, *d2;
+maybe_both_true_1 (struct decision_test *d1, struct decision_test *d2)
{
struct decision_test *t1, *t2;
recursively descend. */
static int
-maybe_both_true (d1, d2, toplevel)
- struct decision *d1, *d2;
- int toplevel;
+maybe_both_true (struct decision *d1, struct decision *d2,
+ int toplevel)
{
struct decision *p1, *p2;
int cmp;
of a node's success nodes (from the loop at the end of this function).
Skip forward until we come to a position that matches.
- Due to the way position strings are constructed, we know that iterating
- forward from the lexically lower position (e.g. "00") will run into
- the lexically higher position (e.g. "1") and not the other way around.
- This saves a bit of effort. */
+ Due to the way positions are constructed, we know that iterating
+ forward from the lexically lower position will run into the lexically
+ higher position and not the other way around. This saves a bit
+ of effort. */
- cmp = strcmp (d1->position, d2->position);
+ cmp = compare_positions (d1->position, d2->position);
if (cmp != 0)
{
- if (toplevel)
- abort ();
+ gcc_assert (!toplevel);
/* If the d2->position was lexically lower, swap. */
if (cmp > 0)
/* A subroutine of nodes_identical. Examine two tests for equivalence. */
static int
-nodes_identical_1 (d1, d2)
- struct decision_test *d1, *d2;
+nodes_identical_1 (struct decision_test *d1, struct decision_test *d2)
{
switch (d1->type)
{
+ case DT_num_insns:
+ return d1->u.num_insns == d2->u.num_insns;
+
case DT_mode:
return d1->u.mode == d2->u.mode;
return 1;
default:
- abort ();
+ gcc_unreachable ();
}
}
consider different orderings on the tests. */
static int
-nodes_identical (d1, d2)
- struct decision *d1, *d2;
+nodes_identical (struct decision *d1, struct decision *d2)
{
struct decision_test *t1, *t2;
invoked. */
if (d1->success.first
&& d2->success.first
- && strcmp (d1->success.first->position, d2->success.first->position))
+ && d1->success.first->position != d2->success.first->position)
return 0;
return 1;
source machine description. */
static void
-merge_accept_insn (oldd, addd)
- struct decision *oldd, *addd;
+merge_accept_insn (struct decision *oldd, struct decision *addd)
{
struct decision_test *old, *add;
}
else
{
- message_with_line (add->u.insn.lineno, "`%s' matches `%s'",
- get_insn_name (add->u.insn.code_number),
- get_insn_name (old->u.insn.code_number));
+ error_with_line (add->u.insn.lineno, "`%s' matches `%s'",
+ get_insn_name (add->u.insn.code_number),
+ get_insn_name (old->u.insn.code_number));
message_with_line (old->u.insn.lineno, "previous definition of `%s'",
get_insn_name (old->u.insn.code_number));
- error_count++;
}
}
/* Merge two decision trees OLDH and ADDH, modifying OLDH destructively. */
static void
-merge_trees (oldh, addh)
- struct decision_head *oldh, *addh;
+merge_trees (struct decision_head *oldh, struct decision_head *addh)
{
struct decision *next, *add;
}
/* Trying to merge bits at different positions isn't possible. */
- if (strcmp (oldh->first->position, addh->first->position))
- abort ();
+ gcc_assert (oldh->first->position == addh->first->position);
for (add = addh->first; add ; add = next)
{
(depending on the test type) to emit switch statements later. */
static void
-factor_tests (head)
- struct decision_head *head;
+factor_tests (struct decision_head *head)
{
struct decision *first, *next;
for (first = head->first; first && first->next; first = next)
{
enum decision_type type;
- struct decision *new, *old_last;
+ struct decision *new_dec, *old_last;
type = first->tests->type;
next = first->next;
below our first test. */
if (first->tests->next != NULL)
{
- new = new_decision (first->position, &first->success);
- new->tests = first->tests->next;
+ new_dec = new_decision (first->position, &first->success);
+ new_dec->tests = first->tests->next;
first->tests->next = NULL;
}
if (next->tests->next != NULL)
{
- new = new_decision (next->position, &next->success);
- new->tests = next->tests->next;
+ new_dec = new_decision (next->position, &next->success);
+ new_dec->tests = next->tests->next;
next->tests->next = NULL;
}
- new = next;
+ new_dec = next;
next = next->next;
- new->next = NULL;
- h.first = h.last = new;
+ new_dec->next = NULL;
+ h.first = h.last = new_dec;
merge_trees (head, &h);
}
predicates, remove them. */
static void
-simplify_tests (head)
- struct decision_head *head;
+simplify_tests (struct decision_head *head)
{
struct decision *tree;
that is generated. */
static int
-break_out_subroutines (head, initial)
- struct decision_head *head;
- int initial;
+break_out_subroutines (struct decision_head *head, int initial)
{
int size = 0;
struct decision *sub;
when p is true. */
static void
-find_afterward (head, real_afterward)
- struct decision_head *head;
- struct decision *real_afterward;
+find_afterward (struct decision_head *head, struct decision *real_afterward)
{
struct decision *p, *q, *afterward;
match multiple insns and we try to step past the end of the stream. */
static void
-change_state (oldpos, newpos, afterward, indent)
- const char *oldpos;
- const char *newpos;
- struct decision *afterward;
- const char *indent;
+change_state (struct position *oldpos, struct position *newpos,
+ const char *indent)
{
- int odepth = strlen (oldpos);
- int ndepth = strlen (newpos);
- int depth;
- int old_has_insn, new_has_insn;
+ while (oldpos->depth > newpos->depth)
+ oldpos = oldpos->base;
- /* Pop up as many levels as necessary. */
- for (depth = odepth; strncmp (oldpos, newpos, depth) != 0; --depth)
- continue;
+ if (oldpos != newpos)
+ switch (newpos->type)
+ {
+ case POS_PEEP2_INSN:
+ printf ("%stem = peep2_next_insn (%d);\n", indent, newpos->arg);
+ printf ("%sx%d = PATTERN (tem);\n", indent, newpos->depth);
+ break;
- /* Hunt for the last [A-Z] in both strings. */
- for (old_has_insn = odepth - 1; old_has_insn >= 0; --old_has_insn)
- if (ISUPPER (oldpos[old_has_insn]))
- break;
- for (new_has_insn = ndepth - 1; new_has_insn >= 0; --new_has_insn)
- if (ISUPPER (newpos[new_has_insn]))
- break;
+ case POS_XEXP:
+ change_state (oldpos, newpos->base, indent);
+ printf ("%sx%d = XEXP (x%d, %d);\n",
+ indent, newpos->depth, newpos->depth - 1, newpos->arg);
+ break;
- /* Go down to desired level. */
- while (depth < ndepth)
- {
- /* It's a different insn from the first one. */
- if (ISUPPER (newpos[depth]))
- {
- /* We can only fail if we're moving down the tree. */
- if (old_has_insn >= 0 && oldpos[old_has_insn] >= newpos[depth])
- {
- printf ("%stem = peep2_next_insn (%d);\n",
- indent, newpos[depth] - 'A');
- }
- else
- {
- printf ("%stem = peep2_next_insn (%d);\n",
- indent, newpos[depth] - 'A');
- printf ("%sif (tem == NULL_RTX)\n", indent);
- if (afterward)
- printf ("%s goto L%d;\n", indent, afterward->number);
- else
- printf ("%s goto ret0;\n", indent);
- }
- printf ("%sx%d = PATTERN (tem);\n", indent, depth + 1);
- }
- else if (ISLOWER (newpos[depth]))
+ case POS_XVECEXP0:
+ change_state (oldpos, newpos->base, indent);
printf ("%sx%d = XVECEXP (x%d, 0, %d);\n",
- indent, depth + 1, depth, newpos[depth] - 'a');
- else
- printf ("%sx%d = XEXP (x%d, %c);\n",
- indent, depth + 1, depth, newpos[depth]);
- ++depth;
+ indent, newpos->depth, newpos->depth - 1, newpos->arg);
+ break;
}
}
\f
the name. */
static void
-print_code (code)
- enum rtx_code code;
+print_code (enum rtx_code code)
{
const char *p;
for (p = GET_RTX_NAME (code); *p; p++)
/* Emit code to cross an afterward link -- change state and branch. */
static void
-write_afterward (start, afterward, indent)
- struct decision *start;
- struct decision *afterward;
- const char *indent;
+write_afterward (struct decision *start, struct decision *afterward,
+ const char *indent)
{
if (!afterward || start->subroutine_number > 0)
printf("%sgoto ret0;\n", indent);
else
{
- change_state (start->position, afterward->position, NULL, indent);
+ change_state (start->position, afterward->position, indent);
printf ("%sgoto L%d;\n", indent, afterward->number);
}
}
+/* Emit a HOST_WIDE_INT as an integer constant expression. We need to take
+ special care to avoid "decimal constant is so large that it is unsigned"
+ warnings in the resulting code. */
+
+static void
+print_host_wide_int (HOST_WIDE_INT val)
+{
+ HOST_WIDE_INT min = (unsigned HOST_WIDE_INT)1 << (HOST_BITS_PER_WIDE_INT-1);
+ if (val == min)
+ printf ("(" HOST_WIDE_INT_PRINT_DEC_C "-1)", val + 1);
+ else
+ printf (HOST_WIDE_INT_PRINT_DEC_C, val);
+}
+
/* Emit a switch statement, if possible, for an initial sequence of
nodes at START. Return the first node yet untested. */
static struct decision *
-write_switch (start, depth)
- struct decision *start;
- int depth;
+write_switch (struct decision *start, int depth)
{
struct decision *p = start;
enum decision_type type = p->tests->type;
else
ret = p;
- while (p && p->tests->type == DT_pred
- && p->tests->u.pred.index >= 0)
+ while (p && p->tests->type == DT_pred && p->tests->u.pred.data)
{
- const RTX_CODE *c;
+ const struct pred_data *data = p->tests->u.pred.data;
+ int c;
- for (c = &preds[p->tests->u.pred.index].codes[0]; *c ; ++c)
- if (codemap[(int) *c] != 0)
+ for (c = 0; c < NUM_RTX_CODE; c++)
+ if (codemap[c] && data->codes[c])
goto pred_done;
- for (c = &preds[p->tests->u.pred.index].codes[0]; *c ; ++c)
- {
- printf (" case ");
- print_code (*c);
- printf (":\n");
- codemap[(int) *c] = 1;
- }
+ for (c = 0; c < NUM_RTX_CODE; c++)
+ if (data->codes[c])
+ {
+ fputs (" case ", stdout);
+ print_code ((enum rtx_code) c);
+ fputs (":\n", stdout);
+ codemap[c] = 1;
+ }
printf (" goto L%d;\n", p->number);
p->need_label = 1;
printf ("(int) XWINT (x%d, 0)", depth);
break;
default:
- abort ();
+ gcc_unreachable ();
}
printf (")\n%s {\n", indent);
case DT_elt_one_int:
case DT_elt_zero_wide:
case DT_elt_zero_wide_safe:
- printf (HOST_WIDE_INT_PRINT_DEC_C, p->tests->u.intval);
+ print_host_wide_int (p->tests->u.intval);
break;
default:
- abort ();
+ gcc_unreachable ();
}
printf (":\n%s goto L%d;\n", indent, p->success.first->number);
p->success.first->need_label = 1;
/* Emit code for one test. */
static void
-write_cond (p, depth, subroutine_type)
- struct decision_test *p;
- int depth;
- enum routine_type subroutine_type;
+write_cond (struct decision_test *p, int depth,
+ enum routine_type subroutine_type)
{
switch (p->type)
{
+ case DT_num_insns:
+ printf ("peep2_current_count >= %d", p->u.num_insns);
+ break;
+
case DT_mode:
printf ("GET_MODE (x%d) == %smode", depth, GET_MODE_NAME (p->u.mode));
break;
case DT_elt_zero_wide:
case DT_elt_zero_wide_safe:
printf ("XWINT (x%d, 0) == ", depth);
- printf (HOST_WIDE_INT_PRINT_DEC_C, p->u.intval);
+ print_host_wide_int (p->u.intval);
+ break;
+
+ case DT_const_int:
+ printf ("x%d == const_int_rtx[MAX_SAVED_CONST_INT + (%d)]",
+ depth, (int) p->u.intval);
break;
case DT_veclen_ge:
break;
case DT_c_test:
- printf ("(%s)", p->u.c_test);
+ print_c_condition (p->u.c_test);
break;
case DT_accept_insn:
- switch (subroutine_type)
- {
- case RECOG:
- if (p->u.insn.num_clobbers_to_add == 0)
- abort ();
- printf ("pnum_clobbers != NULL");
- break;
-
- default:
- abort ();
- }
+ gcc_assert (subroutine_type == RECOG);
+ gcc_assert (p->u.insn.num_clobbers_to_add);
+ printf ("pnum_clobbers != NULL");
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
perform a state change. For the `accept' tests we must do more work. */
static void
-write_action (p, test, depth, uncond, success, subroutine_type)
- struct decision *p;
- struct decision_test *test;
- int depth, uncond;
- struct decision *success;
- enum routine_type subroutine_type;
+write_action (struct decision *p, struct decision_test *test,
+ int depth, int uncond, struct decision *success,
+ enum routine_type subroutine_type)
{
const char *indent;
int want_close = 0;
if (test->next)
{
test = test->next;
- if (test->type != DT_accept_insn)
- abort ();
+ gcc_assert (test->type == DT_accept_insn);
}
}
/* Sanity check that we're now at the end of the list of tests. */
- if (test->next)
- abort ();
+ gcc_assert (!test->next);
if (test->type == DT_accept_insn)
{
if (test->u.insn.num_clobbers_to_add != 0)
printf ("%s*pnum_clobbers = %d;\n",
indent, test->u.insn.num_clobbers_to_add);
- printf ("%sreturn %d;\n", indent, test->u.insn.code_number);
+ printf ("%sreturn %d; /* %s */\n", indent,
+ test->u.insn.code_number,
+ get_insn_name (test->u.insn.code_number));
break;
case SPLIT:
- printf ("%sreturn gen_split_%d (operands);\n",
+ printf ("%sreturn gen_split_%d (insn, operands);\n",
indent, test->u.insn.code_number);
break;
case PEEPHOLE2:
{
- int match_len = 0, i;
+ int match_len = 0;
+ struct position *pos;
- for (i = strlen (p->position) - 1; i >= 0; --i)
- if (ISUPPER (p->position[i]))
+ for (pos = p->position; pos; pos = pos->base)
+ if (pos->type == POS_PEEP2_INSN)
{
- match_len = p->position[i] - 'A';
+ match_len = pos->arg;
break;
}
printf ("%s*_pmatch_len = %d;\n", indent, match_len);
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
else
/* ??? is_unconditional is a stupid name for a tri-state function. */
static int
-is_unconditional (t, subroutine_type)
- struct decision_test *t;
- enum routine_type subroutine_type;
+is_unconditional (struct decision_test *t, enum routine_type subroutine_type)
{
if (t->type == DT_accept_op)
return 1;
case PEEPHOLE2:
return -1;
default:
- abort ();
+ gcc_unreachable ();
}
}
Return true if there is no fallthru path. */
static int
-write_node (p, depth, subroutine_type)
- struct decision *p;
- int depth;
- enum routine_type subroutine_type;
+write_node (struct decision *p, int depth,
+ enum routine_type subroutine_type)
{
struct decision_test *test, *last_test;
int uncond;
+ /* Scan the tests and simplify comparisons against small
+ constants. */
+ for (test = p->tests; test; test = test->next)
+ {
+ if (test->type == DT_code
+ && test->u.code == CONST_INT
+ && test->next
+ && test->next->type == DT_elt_zero_wide_safe
+ && -MAX_SAVED_CONST_INT <= test->next->u.intval
+ && test->next->u.intval <= MAX_SAVED_CONST_INT)
+ {
+ test->type = DT_const_int;
+ test->u.intval = test->next->u.intval;
+ test->next = test->next->next;
+ }
+ }
+
last_test = test = p->tests;
uncond = is_unconditional (test, subroutine_type);
if (uncond == 0)
while ((test = test->next) != NULL)
{
- int uncond2;
-
last_test = test;
- uncond2 = is_unconditional (test, subroutine_type);
- if (uncond2 != 0)
+ if (is_unconditional (test, subroutine_type))
break;
printf ("\n && ");
/* Emit code for all of the sibling nodes of HEAD. */
static void
-write_tree_1 (head, depth, subroutine_type)
- struct decision_head *head;
- int depth;
- enum routine_type subroutine_type;
+write_tree_1 (struct decision_head *head, int depth,
+ enum routine_type subroutine_type)
{
struct decision *p, *next;
int uncond = 0;
position at the node that branched to this node. */
static void
-write_tree (head, prevpos, type, initial)
- struct decision_head *head;
- const char *prevpos;
- enum routine_type type;
- int initial;
+write_tree (struct decision_head *head, struct position *prevpos,
+ enum routine_type type, int initial)
{
struct decision *p = head->first;
else
printf (" if (tem >= 0)\n return tem;\n");
- change_state (p->position, p->afterward->position, NULL, " ");
+ change_state (p->position, p->afterward->position, " ");
printf (" goto L%d;\n", p->afterward->number);
}
else
}
else
{
- int depth = strlen (p->position);
-
- change_state (prevpos, p->position, head->last->afterward, " ");
- write_tree_1 (head, depth, type);
+ change_state (prevpos, p->position, " ");
+ write_tree_1 (head, p->position->depth, type);
for (p = head->first; p; p = p->next)
if (p->success.first)
node TREE. */
static void
-write_subroutine (head, type)
- struct decision_head *head;
- enum routine_type type;
+write_subroutine (struct decision_head *head, enum routine_type type)
{
int subfunction = head->first ? head->first->subroutine_number : 0;
const char *s_or_e;
switch (type)
{
case RECOG:
- printf ("%sint recog%s PARAMS ((rtx, rtx, int *));\n", s_or_e, extension);
printf ("%sint\n\
-recog%s (x0, insn, pnum_clobbers)\n\
- rtx x0 ATTRIBUTE_UNUSED;\n\
- rtx insn ATTRIBUTE_UNUSED;\n\
- int *pnum_clobbers ATTRIBUTE_UNUSED;\n", s_or_e, extension);
+recog%s (rtx x0 ATTRIBUTE_UNUSED,\n\trtx insn ATTRIBUTE_UNUSED,\n\tint *pnum_clobbers ATTRIBUTE_UNUSED)\n", s_or_e, extension);
break;
case SPLIT:
- printf ("%srtx split%s PARAMS ((rtx, rtx));\n", s_or_e, extension);
printf ("%srtx\n\
-split%s (x0, insn)\n\
- rtx x0 ATTRIBUTE_UNUSED;\n\
- rtx insn ATTRIBUTE_UNUSED;\n", s_or_e, extension);
+split%s (rtx x0 ATTRIBUTE_UNUSED, rtx insn ATTRIBUTE_UNUSED)\n",
+ s_or_e, extension);
break;
case PEEPHOLE2:
- printf ("%srtx peephole2%s PARAMS ((rtx, rtx, int *));\n",
- s_or_e, extension);
printf ("%srtx\n\
-peephole2%s (x0, insn, _pmatch_len)\n\
- rtx x0 ATTRIBUTE_UNUSED;\n\
- rtx insn ATTRIBUTE_UNUSED;\n\
- int *_pmatch_len ATTRIBUTE_UNUSED;\n", s_or_e, extension);
+peephole2%s (rtx x0 ATTRIBUTE_UNUSED,\n\trtx insn ATTRIBUTE_UNUSED,\n\tint *_pmatch_len ATTRIBUTE_UNUSED)\n",
+ s_or_e, extension);
break;
}
printf (" recog_data.insn = NULL_RTX;\n");
if (head->first)
- write_tree (head, "", type, 1);
+ write_tree (head, &root_pos, type, 1);
else
printf (" goto ret0;\n");
subroutines, but did not write them out. Do so now. */
static void
-write_subroutines (head, type)
- struct decision_head *head;
- enum routine_type type;
+write_subroutines (struct decision_head *head, enum routine_type type)
{
struct decision *p;
/* Begin the output file. */
static void
-write_header ()
+write_header (void)
{
puts ("\
/* Generated automatically by the program `genrecog' from the target\n\
#include \"function.h\"\n\
#include \"insn-config.h\"\n\
#include \"recog.h\"\n\
-#include \"real.h\"\n\
#include \"output.h\"\n\
#include \"flags.h\"\n\
#include \"hard-reg-set.h\"\n\
#include \"resource.h\"\n\
-#include \"toplev.h\"\n\
+#include \"diagnostic-core.h\"\n\
#include \"reload.h\"\n\
+#include \"regs.h\"\n\
+#include \"tm-constrs.h\"\n\
\n");
puts ("\n\
TYPE says what type of routine we are recognizing (RECOG or SPLIT). */
static struct decision_head
-make_insn_sequence (insn, type)
- rtx insn;
- enum routine_type type;
+make_insn_sequence (rtx insn, enum routine_type type)
{
rtx x;
const char *c_test = XSTR (insn, type == RECOG ? 2 : 1);
struct decision *last;
struct decision_test *test, **place;
struct decision_head head;
- char c_test_pos[2];
+ struct position *c_test_pos, **pos_ptr;
/* We should never see an insn whose C test is false at compile time. */
- if (truth == 0)
- abort ();
-
- record_insn_name (next_insn_code, (type == RECOG ? XSTR (insn, 0) : NULL));
+ gcc_assert (truth);
- c_test_pos[0] = '\0';
+ c_test_pos = &root_pos;
if (type == PEEPHOLE2)
{
int i, j;
x = rtx_alloc (PARALLEL);
PUT_MODE (x, VOIDmode);
XVEC (x, 0) = rtvec_alloc (XVECLEN (insn, 0));
+ pos_ptr = &peep2_insn_pos_list;
for (i = j = 0; i < XVECLEN (insn, 0); i++)
{
rtx tmp = XVECEXP (insn, 0, i);
if (GET_CODE (tmp) != MATCH_SCRATCH && GET_CODE (tmp) != MATCH_DUP)
{
+ c_test_pos = next_position (pos_ptr, &root_pos,
+ POS_PEEP2_INSN, j);
XVECEXP (x, 0, j) = tmp;
j++;
+ pos_ptr = &c_test_pos->next;
}
}
XVECLEN (x, 0) = j;
-
- c_test_pos[0] = 'A' + j - 1;
- c_test_pos[1] = '\0';
}
else if (XVECLEN (insn, type == RECOG) == 1)
x = XVECEXP (insn, type == RECOG, 0);
validate_pattern (x, insn, NULL_RTX, 0);
memset(&head, 0, sizeof(head));
- last = add_to_sequence (x, &head, "", type, 1);
+ last = add_to_sequence (x, &head, &root_pos, type, 1);
/* Find the end of the test chain on the last node. */
for (test = last->tests; test->next; test = test->next)
switch (type)
{
case RECOG:
- /* If this is an DEFINE_INSN and X is a PARALLEL, see if it ends
+ /* If this is a DEFINE_INSN and X is a PARALLEL, see if it ends
with a group of CLOBBERs of (hard) registers or MATCH_SCRATCHes.
If so, set up to recognize the pattern without these CLOBBERs. */
{
rtx y = XVECEXP (x, 0, i - 1);
if (GET_CODE (y) != CLOBBER
- || (GET_CODE (XEXP (y, 0)) != REG
+ || (!REG_P (XEXP (y, 0))
&& GET_CODE (XEXP (y, 0)) != MATCH_SCRATCH))
break;
}
if (i != XVECLEN (x, 0))
{
- rtx new;
+ rtx new_rtx;
struct decision_head clobber_head;
/* Build a similar insn without the clobbers. */
if (i == 1)
- new = XVECEXP (x, 0, 0);
+ new_rtx = XVECEXP (x, 0, 0);
else
{
int j;
- new = rtx_alloc (PARALLEL);
- XVEC (new, 0) = rtvec_alloc (i);
+ new_rtx = rtx_alloc (PARALLEL);
+ XVEC (new_rtx, 0) = rtvec_alloc (i);
for (j = i - 1; j >= 0; j--)
- XVECEXP (new, 0, j) = XVECEXP (x, 0, j);
+ XVECEXP (new_rtx, 0, j) = XVECEXP (x, 0, j);
}
/* Recognize it. */
memset (&clobber_head, 0, sizeof(clobber_head));
- last = add_to_sequence (new, &clobber_head, "", type, 1);
+ last = add_to_sequence (new_rtx, &clobber_head, &root_pos,
+ type, 1);
/* Find the end of the test chain on the last node. */
for (test = last->tests; test->next; test = test->next)
place = &test->next;
if (test->type == DT_accept_op)
{
- last = new_decision ("", &last->success);
+ last = new_decision (&root_pos, &last->success);
place = &last->tests;
}
case SPLIT:
/* Define the subroutine we will call below and emit in genemit. */
- printf ("extern rtx gen_split_%d PARAMS ((rtx *));\n", next_insn_code);
+ printf ("extern rtx gen_split_%d (rtx, rtx *);\n", next_insn_code);
break;
case PEEPHOLE2:
/* Define the subroutine we will call below and emit in genemit. */
- printf ("extern rtx gen_peephole2_%d PARAMS ((rtx, rtx *));\n",
+ printf ("extern rtx gen_peephole2_%d (rtx, rtx *);\n",
next_insn_code);
break;
}
}
static void
-process_tree (head, subroutine_type)
- struct decision_head *head;
- enum routine_type subroutine_type;
+process_tree (struct decision_head *head, enum routine_type subroutine_type)
{
if (head->first == NULL)
{
write_subroutine (head, subroutine_type);
}
\f
-extern int main PARAMS ((int, char **));
+extern int main (int, char **);
int
-main (argc, argv)
- int argc;
- char **argv;
+main (int argc, char **argv)
{
rtx desc;
struct decision_head recog_tree, split_tree, peephole2_tree, h;
memset (&split_tree, 0, sizeof split_tree);
memset (&peephole2_tree, 0, sizeof peephole2_tree);
- if (argc <= 1)
- fatal ("no input file name");
-
- if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
+ if (!init_rtx_reader_args (argc, argv))
return (FATAL_EXIT_CODE);
next_insn_code = 0;
- next_index = 0;
write_header ();
if (desc == NULL)
break;
- if (GET_CODE (desc) == DEFINE_INSN)
+ switch (GET_CODE (desc))
{
+ case DEFINE_INSN:
h = make_insn_sequence (desc, RECOG);
merge_trees (&recog_tree, &h);
- }
- else if (GET_CODE (desc) == DEFINE_SPLIT)
- {
+ break;
+
+ case DEFINE_SPLIT:
h = make_insn_sequence (desc, SPLIT);
merge_trees (&split_tree, &h);
- }
- else if (GET_CODE (desc) == DEFINE_PEEPHOLE2)
- {
+ break;
+
+ case DEFINE_PEEPHOLE2:
h = make_insn_sequence (desc, PEEPHOLE2);
merge_trees (&peephole2_tree, &h);
- }
- next_index++;
+ default:
+ /* do nothing */;
+ }
}
- if (error_count)
+ if (have_error)
return FATAL_EXIT_CODE;
puts ("\n\n");
return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
}
\f
-/* Define this so we can link with print-rtl.o to get debug_rtx function. */
-const char *
-get_insn_name (code)
- int code;
-{
- if (code < insn_name_ptr_size)
- return insn_name_ptr[code];
- else
- return NULL;
-}
-
static void
-record_insn_name (code, name)
- int code;
- const char *name;
-{
- static const char *last_real_name = "insn";
- static int last_real_code = 0;
- char *new;
-
- if (insn_name_ptr_size <= code)
- {
- int new_size;
- new_size = (insn_name_ptr_size ? insn_name_ptr_size * 2 : 512);
- insn_name_ptr =
- (char **) xrealloc (insn_name_ptr, sizeof(char *) * new_size);
- memset (insn_name_ptr + insn_name_ptr_size, 0,
- sizeof(char *) * (new_size - insn_name_ptr_size));
- insn_name_ptr_size = new_size;
- }
-
- if (!name || name[0] == '\0')
- {
- new = xmalloc (strlen (last_real_name) + 10);
- sprintf (new, "%s+%d", last_real_name, code - last_real_code);
- }
- else
- {
- last_real_name = new = xstrdup (name);
- last_real_code = code;
- }
-
- insn_name_ptr[code] = new;
-}
-\f
-static void
-debug_decision_2 (test)
- struct decision_test *test;
+debug_decision_2 (struct decision_test *test)
{
switch (test->type)
{
+ case DT_num_insns:
+ fprintf (stderr, "num_insns=%d", test->u.num_insns);
+ break;
case DT_mode:
fprintf (stderr, "mode=%s", GET_MODE_NAME (test->u.mode));
break;
fprintf (stderr, "elt1_i=%d", (int) test->u.intval);
break;
case DT_elt_zero_wide:
- fprintf (stderr, "elt0_w=");
- fprintf (stderr, HOST_WIDE_INT_PRINT_DEC, test->u.intval);
+ fprintf (stderr, "elt0_w=" HOST_WIDE_INT_PRINT_DEC, test->u.intval);
break;
case DT_elt_zero_wide_safe:
- fprintf (stderr, "elt0_ws=");
- fprintf (stderr, HOST_WIDE_INT_PRINT_DEC, test->u.intval);
+ fprintf (stderr, "elt0_ws=" HOST_WIDE_INT_PRINT_DEC, test->u.intval);
break;
case DT_veclen_ge:
fprintf (stderr, "veclen>=%d", test->u.veclen);
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
static void
-debug_decision_1 (d, indent)
- struct decision *d;
- int indent;
+debug_decision_1 (struct decision *d, int indent)
{
int i;
struct decision_test *test;
}
static void
-debug_decision_0 (d, indent, maxdepth)
- struct decision *d;
- int indent, maxdepth;
+debug_decision_0 (struct decision *d, int indent, int maxdepth)
{
struct decision *n;
int i;
debug_decision_0 (n, indent + 2, maxdepth - 1);
}
-void
-debug_decision (d)
- struct decision *d;
+DEBUG_FUNCTION void
+debug_decision (struct decision *d)
{
debug_decision_0 (d, 0, 1000000);
}
-void
-debug_decision_list (d)
- struct decision *d;
+DEBUG_FUNCTION void
+debug_decision_list (struct decision *d)
{
while (d)
{
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