bd52d17906
too large to list, but see: http://gcc.gnu.org/gcc-3.4/changes.html http://gcc.gnu.org/gcc-4.0/changes.html http://gcc.gnu.org/gcc-4.1/changes.html for the details.
690 lines
16 KiB
C
690 lines
16 KiB
C
/* Instruction scheduling pass.
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Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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1999, 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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Contributed by Michael Tiemann (tiemann@cygnus.com) Enhanced by,
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and currently maintained by, Jim Wilson (wilson@cygnus.com)
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "toplev.h"
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#include "rtl.h"
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#include "tm_p.h"
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#include "regs.h"
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#include "hard-reg-set.h"
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#include "basic-block.h"
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#include "insn-attr.h"
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#include "real.h"
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#include "sched-int.h"
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#include "target.h"
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#ifdef INSN_SCHEDULING
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static char *safe_concat (char *, char *, const char *);
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static void print_exp (char *, rtx, int);
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static void print_value (char *, rtx, int);
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static void print_pattern (char *, rtx, int);
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#define BUF_LEN 2048
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static char *
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safe_concat (char *buf, char *cur, const char *str)
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{
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char *end = buf + BUF_LEN - 2; /* Leave room for null. */
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int c;
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if (cur > end)
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{
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*end = '\0';
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return end;
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}
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while (cur < end && (c = *str++) != '\0')
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*cur++ = c;
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*cur = '\0';
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return cur;
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}
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/* This recognizes rtx, I classified as expressions. These are always
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represent some action on values or results of other expression, that
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may be stored in objects representing values. */
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static void
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print_exp (char *buf, rtx x, int verbose)
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{
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char tmp[BUF_LEN];
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const char *st[4];
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char *cur = buf;
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const char *fun = (char *) 0;
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const char *sep;
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rtx op[4];
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int i;
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for (i = 0; i < 4; i++)
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{
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st[i] = (char *) 0;
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op[i] = NULL_RTX;
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}
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switch (GET_CODE (x))
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{
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case PLUS:
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op[0] = XEXP (x, 0);
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if (GET_CODE (XEXP (x, 1)) == CONST_INT
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&& INTVAL (XEXP (x, 1)) < 0)
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{
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st[1] = "-";
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op[1] = GEN_INT (-INTVAL (XEXP (x, 1)));
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}
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else
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{
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st[1] = "+";
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op[1] = XEXP (x, 1);
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}
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break;
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case LO_SUM:
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op[0] = XEXP (x, 0);
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st[1] = "+low(";
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op[1] = XEXP (x, 1);
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st[2] = ")";
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break;
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case MINUS:
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op[0] = XEXP (x, 0);
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st[1] = "-";
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op[1] = XEXP (x, 1);
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break;
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case COMPARE:
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fun = "cmp";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case NEG:
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st[0] = "-";
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op[0] = XEXP (x, 0);
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break;
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case MULT:
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op[0] = XEXP (x, 0);
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st[1] = "*";
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op[1] = XEXP (x, 1);
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break;
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case DIV:
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op[0] = XEXP (x, 0);
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st[1] = "/";
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op[1] = XEXP (x, 1);
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break;
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case UDIV:
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fun = "udiv";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case MOD:
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op[0] = XEXP (x, 0);
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st[1] = "%";
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op[1] = XEXP (x, 1);
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break;
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case UMOD:
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fun = "umod";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case SMIN:
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fun = "smin";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case SMAX:
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fun = "smax";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case UMIN:
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fun = "umin";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case UMAX:
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fun = "umax";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case NOT:
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st[0] = "!";
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op[0] = XEXP (x, 0);
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break;
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case AND:
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op[0] = XEXP (x, 0);
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st[1] = "&";
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op[1] = XEXP (x, 1);
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break;
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case IOR:
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op[0] = XEXP (x, 0);
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st[1] = "|";
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op[1] = XEXP (x, 1);
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break;
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case XOR:
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op[0] = XEXP (x, 0);
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st[1] = "^";
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op[1] = XEXP (x, 1);
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break;
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case ASHIFT:
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op[0] = XEXP (x, 0);
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st[1] = "<<";
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op[1] = XEXP (x, 1);
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break;
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case LSHIFTRT:
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op[0] = XEXP (x, 0);
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st[1] = " 0>>";
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op[1] = XEXP (x, 1);
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break;
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case ASHIFTRT:
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op[0] = XEXP (x, 0);
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st[1] = ">>";
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op[1] = XEXP (x, 1);
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break;
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case ROTATE:
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op[0] = XEXP (x, 0);
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st[1] = "<-<";
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op[1] = XEXP (x, 1);
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break;
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case ROTATERT:
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op[0] = XEXP (x, 0);
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st[1] = ">->";
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op[1] = XEXP (x, 1);
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break;
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case ABS:
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fun = "abs";
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op[0] = XEXP (x, 0);
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break;
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case SQRT:
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fun = "sqrt";
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op[0] = XEXP (x, 0);
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break;
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case FFS:
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fun = "ffs";
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op[0] = XEXP (x, 0);
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break;
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case EQ:
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op[0] = XEXP (x, 0);
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st[1] = "==";
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op[1] = XEXP (x, 1);
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break;
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case NE:
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op[0] = XEXP (x, 0);
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st[1] = "!=";
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op[1] = XEXP (x, 1);
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break;
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case GT:
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op[0] = XEXP (x, 0);
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st[1] = ">";
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op[1] = XEXP (x, 1);
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break;
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case GTU:
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fun = "gtu";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case LT:
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op[0] = XEXP (x, 0);
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st[1] = "<";
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op[1] = XEXP (x, 1);
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break;
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case LTU:
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fun = "ltu";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case GE:
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op[0] = XEXP (x, 0);
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st[1] = ">=";
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op[1] = XEXP (x, 1);
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break;
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case GEU:
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fun = "geu";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case LE:
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op[0] = XEXP (x, 0);
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st[1] = "<=";
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op[1] = XEXP (x, 1);
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break;
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case LEU:
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fun = "leu";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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break;
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case SIGN_EXTRACT:
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fun = (verbose) ? "sign_extract" : "sxt";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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op[2] = XEXP (x, 2);
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break;
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case ZERO_EXTRACT:
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fun = (verbose) ? "zero_extract" : "zxt";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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op[2] = XEXP (x, 2);
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break;
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case SIGN_EXTEND:
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fun = (verbose) ? "sign_extend" : "sxn";
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op[0] = XEXP (x, 0);
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break;
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case ZERO_EXTEND:
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fun = (verbose) ? "zero_extend" : "zxn";
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op[0] = XEXP (x, 0);
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break;
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case FLOAT_EXTEND:
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fun = (verbose) ? "float_extend" : "fxn";
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op[0] = XEXP (x, 0);
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break;
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case TRUNCATE:
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fun = (verbose) ? "trunc" : "trn";
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op[0] = XEXP (x, 0);
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break;
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case FLOAT_TRUNCATE:
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fun = (verbose) ? "float_trunc" : "ftr";
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op[0] = XEXP (x, 0);
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break;
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case FLOAT:
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fun = (verbose) ? "float" : "flt";
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op[0] = XEXP (x, 0);
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break;
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case UNSIGNED_FLOAT:
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fun = (verbose) ? "uns_float" : "ufl";
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op[0] = XEXP (x, 0);
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break;
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case FIX:
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fun = "fix";
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op[0] = XEXP (x, 0);
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break;
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case UNSIGNED_FIX:
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fun = (verbose) ? "uns_fix" : "ufx";
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op[0] = XEXP (x, 0);
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break;
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case PRE_DEC:
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st[0] = "--";
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op[0] = XEXP (x, 0);
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break;
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case PRE_INC:
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st[0] = "++";
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op[0] = XEXP (x, 0);
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break;
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case POST_DEC:
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op[0] = XEXP (x, 0);
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st[1] = "--";
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break;
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case POST_INC:
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op[0] = XEXP (x, 0);
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st[1] = "++";
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break;
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case CALL:
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st[0] = "call ";
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op[0] = XEXP (x, 0);
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if (verbose)
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{
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st[1] = " argc:";
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op[1] = XEXP (x, 1);
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}
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break;
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case IF_THEN_ELSE:
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st[0] = "{(";
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op[0] = XEXP (x, 0);
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st[1] = ")?";
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op[1] = XEXP (x, 1);
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st[2] = ":";
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op[2] = XEXP (x, 2);
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st[3] = "}";
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break;
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case TRAP_IF:
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fun = "trap_if";
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op[0] = TRAP_CONDITION (x);
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break;
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case PREFETCH:
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fun = "prefetch";
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op[0] = XEXP (x, 0);
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op[1] = XEXP (x, 1);
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op[2] = XEXP (x, 2);
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break;
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case UNSPEC:
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case UNSPEC_VOLATILE:
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{
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cur = safe_concat (buf, cur, "unspec");
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if (GET_CODE (x) == UNSPEC_VOLATILE)
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cur = safe_concat (buf, cur, "/v");
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cur = safe_concat (buf, cur, "[");
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sep = "";
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for (i = 0; i < XVECLEN (x, 0); i++)
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{
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print_pattern (tmp, XVECEXP (x, 0, i), verbose);
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cur = safe_concat (buf, cur, sep);
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cur = safe_concat (buf, cur, tmp);
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sep = ",";
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}
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cur = safe_concat (buf, cur, "] ");
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sprintf (tmp, "%d", XINT (x, 1));
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cur = safe_concat (buf, cur, tmp);
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}
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break;
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default:
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/* If (verbose) debug_rtx (x); */
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st[0] = GET_RTX_NAME (GET_CODE (x));
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break;
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}
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/* Print this as a function? */
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if (fun)
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{
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cur = safe_concat (buf, cur, fun);
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cur = safe_concat (buf, cur, "(");
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}
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for (i = 0; i < 4; i++)
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{
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if (st[i])
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cur = safe_concat (buf, cur, st[i]);
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if (op[i])
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{
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if (fun && i != 0)
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cur = safe_concat (buf, cur, ",");
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print_value (tmp, op[i], verbose);
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cur = safe_concat (buf, cur, tmp);
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}
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}
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if (fun)
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cur = safe_concat (buf, cur, ")");
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} /* print_exp */
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/* Prints rtxes, I customarily classified as values. They're constants,
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registers, labels, symbols and memory accesses. */
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static void
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print_value (char *buf, rtx x, int verbose)
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{
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char t[BUF_LEN];
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char *cur = buf;
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switch (GET_CODE (x))
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{
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case CONST_INT:
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sprintf (t, HOST_WIDE_INT_PRINT_HEX, INTVAL (x));
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cur = safe_concat (buf, cur, t);
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break;
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case CONST_DOUBLE:
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if (FLOAT_MODE_P (GET_MODE (x)))
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real_to_decimal (t, CONST_DOUBLE_REAL_VALUE (x), sizeof (t), 0, 1);
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else
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sprintf (t, "<0x%lx,0x%lx>", (long) CONST_DOUBLE_LOW (x), (long) CONST_DOUBLE_HIGH (x));
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cur = safe_concat (buf, cur, t);
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break;
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case CONST_STRING:
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cur = safe_concat (buf, cur, "\"");
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cur = safe_concat (buf, cur, XSTR (x, 0));
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cur = safe_concat (buf, cur, "\"");
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break;
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case SYMBOL_REF:
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cur = safe_concat (buf, cur, "`");
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cur = safe_concat (buf, cur, XSTR (x, 0));
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cur = safe_concat (buf, cur, "'");
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break;
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case LABEL_REF:
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sprintf (t, "L%d", INSN_UID (XEXP (x, 0)));
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cur = safe_concat (buf, cur, t);
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break;
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case CONST:
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print_value (t, XEXP (x, 0), verbose);
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cur = safe_concat (buf, cur, "const(");
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cur = safe_concat (buf, cur, t);
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cur = safe_concat (buf, cur, ")");
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break;
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case HIGH:
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print_value (t, XEXP (x, 0), verbose);
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cur = safe_concat (buf, cur, "high(");
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cur = safe_concat (buf, cur, t);
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cur = safe_concat (buf, cur, ")");
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break;
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case REG:
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if (REGNO (x) < FIRST_PSEUDO_REGISTER)
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{
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int c = reg_names[REGNO (x)][0];
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if (ISDIGIT (c))
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cur = safe_concat (buf, cur, "%");
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cur = safe_concat (buf, cur, reg_names[REGNO (x)]);
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}
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else
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{
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sprintf (t, "r%d", REGNO (x));
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cur = safe_concat (buf, cur, t);
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}
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break;
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case SUBREG:
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print_value (t, SUBREG_REG (x), verbose);
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cur = safe_concat (buf, cur, t);
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sprintf (t, "#%d", SUBREG_BYTE (x));
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cur = safe_concat (buf, cur, t);
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break;
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case SCRATCH:
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cur = safe_concat (buf, cur, "scratch");
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break;
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case CC0:
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cur = safe_concat (buf, cur, "cc0");
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break;
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case PC:
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cur = safe_concat (buf, cur, "pc");
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break;
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case MEM:
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print_value (t, XEXP (x, 0), verbose);
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cur = safe_concat (buf, cur, "[");
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cur = safe_concat (buf, cur, t);
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cur = safe_concat (buf, cur, "]");
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break;
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default:
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print_exp (t, x, verbose);
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cur = safe_concat (buf, cur, t);
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break;
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}
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} /* print_value */
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/* The next step in insn detalization, its pattern recognition. */
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static void
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print_pattern (char *buf, rtx x, int verbose)
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{
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char t1[BUF_LEN], t2[BUF_LEN], t3[BUF_LEN];
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switch (GET_CODE (x))
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{
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case SET:
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print_value (t1, SET_DEST (x), verbose);
|
||
print_value (t2, SET_SRC (x), verbose);
|
||
sprintf (buf, "%s=%s", t1, t2);
|
||
break;
|
||
case RETURN:
|
||
sprintf (buf, "return");
|
||
break;
|
||
case CALL:
|
||
print_exp (buf, x, verbose);
|
||
break;
|
||
case CLOBBER:
|
||
print_value (t1, XEXP (x, 0), verbose);
|
||
sprintf (buf, "clobber %s", t1);
|
||
break;
|
||
case USE:
|
||
print_value (t1, XEXP (x, 0), verbose);
|
||
sprintf (buf, "use %s", t1);
|
||
break;
|
||
case COND_EXEC:
|
||
if (GET_CODE (COND_EXEC_TEST (x)) == NE
|
||
&& XEXP (COND_EXEC_TEST (x), 1) == const0_rtx)
|
||
print_value (t1, XEXP (COND_EXEC_TEST (x), 0), verbose);
|
||
else if (GET_CODE (COND_EXEC_TEST (x)) == EQ
|
||
&& XEXP (COND_EXEC_TEST (x), 1) == const0_rtx)
|
||
{
|
||
t1[0] = '!';
|
||
print_value (t1 + 1, XEXP (COND_EXEC_TEST (x), 0), verbose);
|
||
}
|
||
else
|
||
print_value (t1, COND_EXEC_TEST (x), verbose);
|
||
print_pattern (t2, COND_EXEC_CODE (x), verbose);
|
||
sprintf (buf, "(%s) %s", t1, t2);
|
||
break;
|
||
case PARALLEL:
|
||
{
|
||
int i;
|
||
|
||
sprintf (t1, "{");
|
||
for (i = 0; i < XVECLEN (x, 0); i++)
|
||
{
|
||
print_pattern (t2, XVECEXP (x, 0, i), verbose);
|
||
sprintf (t3, "%s%s;", t1, t2);
|
||
strcpy (t1, t3);
|
||
}
|
||
sprintf (buf, "%s}", t1);
|
||
}
|
||
break;
|
||
case SEQUENCE:
|
||
/* Should never see SEQUENCE codes until after reorg. */
|
||
gcc_unreachable ();
|
||
case ASM_INPUT:
|
||
sprintf (buf, "asm {%s}", XSTR (x, 0));
|
||
break;
|
||
case ADDR_VEC:
|
||
break;
|
||
case ADDR_DIFF_VEC:
|
||
print_value (buf, XEXP (x, 0), verbose);
|
||
break;
|
||
case TRAP_IF:
|
||
print_value (t1, TRAP_CONDITION (x), verbose);
|
||
sprintf (buf, "trap_if %s", t1);
|
||
break;
|
||
case UNSPEC:
|
||
{
|
||
int i;
|
||
|
||
sprintf (t1, "unspec{");
|
||
for (i = 0; i < XVECLEN (x, 0); i++)
|
||
{
|
||
print_pattern (t2, XVECEXP (x, 0, i), verbose);
|
||
sprintf (t3, "%s%s;", t1, t2);
|
||
strcpy (t1, t3);
|
||
}
|
||
sprintf (buf, "%s}", t1);
|
||
}
|
||
break;
|
||
case UNSPEC_VOLATILE:
|
||
{
|
||
int i;
|
||
|
||
sprintf (t1, "unspec/v{");
|
||
for (i = 0; i < XVECLEN (x, 0); i++)
|
||
{
|
||
print_pattern (t2, XVECEXP (x, 0, i), verbose);
|
||
sprintf (t3, "%s%s;", t1, t2);
|
||
strcpy (t1, t3);
|
||
}
|
||
sprintf (buf, "%s}", t1);
|
||
}
|
||
break;
|
||
default:
|
||
print_value (buf, x, verbose);
|
||
}
|
||
} /* print_pattern */
|
||
|
||
/* This is the main function in rtl visualization mechanism. It
|
||
accepts an rtx and tries to recognize it as an insn, then prints it
|
||
properly in human readable form, resembling assembler mnemonics.
|
||
For every insn it prints its UID and BB the insn belongs too.
|
||
(Probably the last "option" should be extended somehow, since it
|
||
depends now on sched.c inner variables ...) */
|
||
|
||
void
|
||
print_insn (char *buf, rtx x, int verbose)
|
||
{
|
||
char t[BUF_LEN];
|
||
rtx insn = x;
|
||
|
||
switch (GET_CODE (x))
|
||
{
|
||
case INSN:
|
||
print_pattern (t, PATTERN (x), verbose);
|
||
if (verbose)
|
||
sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (x, 1),
|
||
t);
|
||
else
|
||
sprintf (buf, "%-4d %s", INSN_UID (x), t);
|
||
break;
|
||
case JUMP_INSN:
|
||
print_pattern (t, PATTERN (x), verbose);
|
||
if (verbose)
|
||
sprintf (buf, "%s: jump %s", (*current_sched_info->print_insn) (x, 1),
|
||
t);
|
||
else
|
||
sprintf (buf, "%-4d %s", INSN_UID (x), t);
|
||
break;
|
||
case CALL_INSN:
|
||
x = PATTERN (insn);
|
||
if (GET_CODE (x) == PARALLEL)
|
||
{
|
||
x = XVECEXP (x, 0, 0);
|
||
print_pattern (t, x, verbose);
|
||
}
|
||
else
|
||
strcpy (t, "call <...>");
|
||
if (verbose)
|
||
sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (x, 1), t);
|
||
else
|
||
sprintf (buf, "%-4d %s", INSN_UID (insn), t);
|
||
break;
|
||
case CODE_LABEL:
|
||
sprintf (buf, "L%d:", INSN_UID (x));
|
||
break;
|
||
case BARRIER:
|
||
sprintf (buf, "i% 4d: barrier", INSN_UID (x));
|
||
break;
|
||
case NOTE:
|
||
if (NOTE_LINE_NUMBER (x) > 0)
|
||
{
|
||
expanded_location xloc;
|
||
NOTE_EXPANDED_LOCATION (xloc, x);
|
||
sprintf (buf, "%4d note \"%s\" %d", INSN_UID (x),
|
||
xloc.file, xloc.line);
|
||
}
|
||
else
|
||
sprintf (buf, "%4d %s", INSN_UID (x),
|
||
GET_NOTE_INSN_NAME (NOTE_LINE_NUMBER (x)));
|
||
break;
|
||
default:
|
||
if (verbose)
|
||
{
|
||
sprintf (buf, "Not an INSN at all\n");
|
||
debug_rtx (x);
|
||
}
|
||
else
|
||
sprintf (buf, "i%-4d <What?>", INSN_UID (x));
|
||
}
|
||
} /* print_insn */
|
||
|
||
#endif
|