772 lines
18 KiB
C
772 lines
18 KiB
C
/* Print RTL for GNU C Compiler.
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Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000
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Free Software Foundation, Inc.
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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, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "config.h"
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#include "system.h"
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#include "rtl.h"
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/* We don't want the tree code checking code for the access to the
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DECL_NAME to be included in the gen* programs. */
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#undef ENABLE_TREE_CHECKING
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#include "tree.h"
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#include "real.h"
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#include "flags.h"
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#include "hard-reg-set.h"
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#include "basic-block.h"
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/* How to print out a register name.
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We don't use PRINT_REG because some definitions of PRINT_REG
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don't work here. */
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#ifndef DEBUG_PRINT_REG
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#define DEBUG_PRINT_REG(RTX, CODE, FILE) \
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fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)])
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#endif
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/* Array containing all of the register names */
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#ifdef DEBUG_REGISTER_NAMES
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static const char * const debug_reg_names[] = DEBUG_REGISTER_NAMES;
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#define reg_names debug_reg_names
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#else
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const char * reg_names[] = REGISTER_NAMES;
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#endif
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static FILE *outfile;
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static int sawclose = 0;
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static int indent;
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static void print_rtx PARAMS ((rtx));
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/* String printed at beginning of each RTL when it is dumped.
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This string is set to ASM_COMMENT_START when the RTL is dumped in
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the assembly output file. */
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const char *print_rtx_head = "";
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/* Nonzero means suppress output of instruction numbers and line number
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notes in debugging dumps.
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This must be defined here so that programs like gencodes can be linked. */
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int flag_dump_unnumbered = 0;
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/* Nonzero means use simplified format without flags, modes, etc. */
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int flag_simple = 0;
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/* Nonzero if we are dumping graphical description. */
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int dump_for_graph;
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/* Nonzero to dump all call_placeholder alternatives. */
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static int debug_call_placeholder_verbose;
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void
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print_mem_expr (outfile, expr)
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FILE *outfile;
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tree expr;
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{
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if (TREE_CODE (expr) == COMPONENT_REF)
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{
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if (TREE_OPERAND (expr, 0))
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print_mem_expr (outfile, TREE_OPERAND (expr, 0));
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else
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fputs (" <variable>", outfile);
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if (DECL_NAME (TREE_OPERAND (expr, 1)))
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fprintf (outfile, ".%s",
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IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
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}
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else if (TREE_CODE (expr) == INDIRECT_REF)
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{
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fputs (" (*", outfile);
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print_mem_expr (outfile, TREE_OPERAND (expr, 0));
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fputs (")", outfile);
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}
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else if (DECL_NAME (expr))
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fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
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else if (TREE_CODE (expr) == RESULT_DECL)
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fputs (" <result>", outfile);
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else
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fputs (" <anonymous>", outfile);
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}
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/* Print IN_RTX onto OUTFILE. This is the recursive part of printing. */
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static void
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print_rtx (in_rtx)
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rtx in_rtx;
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{
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int i = 0;
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int j;
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const char *format_ptr;
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int is_insn;
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rtx tem;
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if (sawclose)
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{
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if (flag_simple)
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fputc (' ', outfile);
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else
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fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
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sawclose = 0;
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}
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if (in_rtx == 0)
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{
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fputs ("(nil)", outfile);
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sawclose = 1;
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return;
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}
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else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
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{
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fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
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sawclose = 1;
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return;
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}
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is_insn = INSN_P (in_rtx);
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/* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
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in separate nodes and therefore have to handle them special here. */
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if (dump_for_graph
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&& (is_insn || GET_CODE (in_rtx) == NOTE
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|| GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
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{
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i = 3;
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indent = 0;
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}
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else
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{
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/* Print name of expression code. */
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if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
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fputc ('(', outfile);
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else
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fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
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if (! flag_simple)
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{
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if (in_rtx->in_struct)
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fputs ("/s", outfile);
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if (in_rtx->volatil)
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fputs ("/v", outfile);
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if (in_rtx->unchanging)
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fputs ("/u", outfile);
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if (in_rtx->integrated)
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fputs ("/i", outfile);
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if (in_rtx->frame_related)
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fputs ("/f", outfile);
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if (in_rtx->jump)
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fputs ("/j", outfile);
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if (in_rtx->call)
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fputs ("/c", outfile);
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if (GET_MODE (in_rtx) != VOIDmode)
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{
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/* Print REG_NOTE names for EXPR_LIST and INSN_LIST. */
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if (GET_CODE (in_rtx) == EXPR_LIST
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|| GET_CODE (in_rtx) == INSN_LIST)
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fprintf (outfile, ":%s",
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GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
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else
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fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
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}
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}
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}
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/* Get the format string and skip the first elements if we have handled
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them already. */
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format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
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for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
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switch (*format_ptr++)
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{
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const char *str;
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case 'T':
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str = XTMPL (in_rtx, i);
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goto string;
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case 'S':
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case 's':
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str = XSTR (in_rtx, i);
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string:
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if (str == 0)
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fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
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else
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{
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if (dump_for_graph)
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fprintf (outfile, " (\\\"%s\\\")", str);
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else
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fprintf (outfile, " (\"%s\")", str);
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}
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sawclose = 1;
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break;
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/* 0 indicates a field for internal use that should not be printed.
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An exception is the third field of a NOTE, where it indicates
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that the field has several different valid contents. */
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case '0':
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if (i == 1 && GET_CODE (in_rtx) == REG)
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{
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if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
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fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
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break;
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}
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if (i == 3 && GET_CODE (in_rtx) == NOTE)
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{
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switch (NOTE_LINE_NUMBER (in_rtx))
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{
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case NOTE_INSN_EH_REGION_BEG:
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case NOTE_INSN_EH_REGION_END:
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if (flag_dump_unnumbered)
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fprintf (outfile, " #");
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else
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fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
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sawclose = 1;
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break;
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case NOTE_INSN_BLOCK_BEG:
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case NOTE_INSN_BLOCK_END:
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fprintf (outfile, " ");
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if (flag_dump_unnumbered)
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fprintf (outfile, "#");
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else
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fprintf (outfile, HOST_PTR_PRINTF,
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(char *) NOTE_BLOCK (in_rtx));
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sawclose = 1;
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break;
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case NOTE_INSN_RANGE_BEG:
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case NOTE_INSN_RANGE_END:
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case NOTE_INSN_LIVE:
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indent += 2;
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if (!sawclose)
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fprintf (outfile, " ");
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print_rtx (NOTE_RANGE_INFO (in_rtx));
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indent -= 2;
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break;
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case NOTE_INSN_BASIC_BLOCK:
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{
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basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
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if (bb != 0)
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fprintf (outfile, " [bb %d]", bb->index);
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break;
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}
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case NOTE_INSN_EXPECTED_VALUE:
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indent += 2;
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if (!sawclose)
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fprintf (outfile, " ");
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print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
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indent -= 2;
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break;
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case NOTE_INSN_DELETED_LABEL:
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if (NOTE_SOURCE_FILE (in_rtx))
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fprintf (outfile, " (\"%s\")", NOTE_SOURCE_FILE (in_rtx));
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else
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fprintf (outfile, " \"\"");
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break;
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default:
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{
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const char * const str = X0STR (in_rtx, i);
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if (NOTE_LINE_NUMBER (in_rtx) < 0)
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;
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else if (str == 0)
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fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
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else
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{
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if (dump_for_graph)
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fprintf (outfile, " (\\\"%s\\\")", str);
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else
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fprintf (outfile, " (\"%s\")", str);
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}
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break;
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}
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}
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}
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break;
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case 'e':
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do_e:
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indent += 2;
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if (!sawclose)
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fprintf (outfile, " ");
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print_rtx (XEXP (in_rtx, i));
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indent -= 2;
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break;
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case 'E':
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case 'V':
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indent += 2;
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if (sawclose)
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{
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fprintf (outfile, "\n%s%*s",
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print_rtx_head, indent * 2, "");
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sawclose = 0;
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}
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fputs ("[ ", outfile);
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if (NULL != XVEC (in_rtx, i))
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{
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indent += 2;
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if (XVECLEN (in_rtx, i))
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sawclose = 1;
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for (j = 0; j < XVECLEN (in_rtx, i); j++)
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print_rtx (XVECEXP (in_rtx, i, j));
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indent -= 2;
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}
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if (sawclose)
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fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
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fputs ("] ", outfile);
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sawclose = 1;
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indent -= 2;
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break;
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case 'w':
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if (! flag_simple)
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fprintf (outfile, " ");
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fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
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if (! flag_simple)
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{
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fprintf (outfile, " [");
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fprintf (outfile, HOST_WIDE_INT_PRINT_HEX, XWINT (in_rtx, i));
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fprintf (outfile, "]");
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}
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break;
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case 'i':
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if (i == 5 && GET_CODE (in_rtx) == NOTE)
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{
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/* This field is only used for NOTE_INSN_DELETED_LABEL, and
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other times often contains garbage from INSN->NOTE death. */
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if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
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fprintf (outfile, " %d", XINT (in_rtx, i));
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}
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else
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{
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int value = XINT (in_rtx, i);
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const char *name;
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if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
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{
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fputc (' ', outfile);
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DEBUG_PRINT_REG (in_rtx, 0, outfile);
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}
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else if (GET_CODE (in_rtx) == REG
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&& value <= LAST_VIRTUAL_REGISTER)
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{
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if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
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fprintf (outfile, " %d virtual-incoming-args", value);
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else if (value == VIRTUAL_STACK_VARS_REGNUM)
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fprintf (outfile, " %d virtual-stack-vars", value);
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else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
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fprintf (outfile, " %d virtual-stack-dynamic", value);
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else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
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fprintf (outfile, " %d virtual-outgoing-args", value);
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else if (value == VIRTUAL_CFA_REGNUM)
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fprintf (outfile, " %d virtual-cfa", value);
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else
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fprintf (outfile, " %d virtual-reg-%d", value,
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value-FIRST_VIRTUAL_REGISTER);
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}
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else if (flag_dump_unnumbered
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&& (is_insn || GET_CODE (in_rtx) == NOTE))
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fputc ('#', outfile);
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else
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fprintf (outfile, " %d", value);
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if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
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&& XINT (in_rtx, i) >= 0
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&& (name = get_insn_name (XINT (in_rtx, i))) != NULL)
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fprintf (outfile, " {%s}", name);
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sawclose = 0;
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}
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break;
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/* Print NOTE_INSN names rather than integer codes. */
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case 'n':
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if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
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&& XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
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fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
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else
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fprintf (outfile, " %d", XINT (in_rtx, i));
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sawclose = 0;
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break;
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case 'u':
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if (XEXP (in_rtx, i) != NULL)
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{
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rtx sub = XEXP (in_rtx, i);
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enum rtx_code subc = GET_CODE (sub);
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if (GET_CODE (in_rtx) == LABEL_REF)
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{
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if (subc == NOTE
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&& NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
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{
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if (flag_dump_unnumbered)
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fprintf (outfile, " [# deleted]");
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else
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fprintf (outfile, " [%d deleted]", INSN_UID (sub));
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sawclose = 0;
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break;
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}
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if (subc != CODE_LABEL)
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goto do_e;
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}
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if (flag_dump_unnumbered)
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fputs (" #", outfile);
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else
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fprintf (outfile, " %d", INSN_UID (sub));
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}
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else
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fputs (" 0", outfile);
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sawclose = 0;
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break;
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case 'b':
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if (XBITMAP (in_rtx, i) == NULL)
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fputs (" {null}", outfile);
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else
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bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
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sawclose = 0;
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break;
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case 't':
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putc (' ', outfile);
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fprintf (outfile, HOST_PTR_PRINTF, (char *) XTREE (in_rtx, i));
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break;
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case '*':
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fputs (" Unknown", outfile);
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sawclose = 0;
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break;
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default:
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fprintf (stderr,
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"switch format wrong in rtl.print_rtx(). format was: %c.\n",
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format_ptr[-1]);
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abort ();
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}
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switch (GET_CODE (in_rtx))
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{
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case MEM:
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fputs (" [", outfile);
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fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
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if (MEM_EXPR (in_rtx))
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print_mem_expr (outfile, MEM_EXPR (in_rtx));
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if (MEM_OFFSET (in_rtx))
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{
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fputc ('+', outfile);
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fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
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INTVAL (MEM_OFFSET (in_rtx)));
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}
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if (MEM_SIZE (in_rtx))
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{
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fputs (" S", outfile);
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fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
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INTVAL (MEM_SIZE (in_rtx)));
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}
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if (MEM_ALIGN (in_rtx) != 1)
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fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
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fputc (']', outfile);
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break;
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#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT && MAX_LONG_DOUBLE_TYPE_SIZE == 64
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case CONST_DOUBLE:
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if (FLOAT_MODE_P (GET_MODE (in_rtx)))
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{
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double val;
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REAL_VALUE_FROM_CONST_DOUBLE (val, in_rtx);
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fprintf (outfile, " [%.16g]", val);
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}
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break;
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#endif
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case CODE_LABEL:
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fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
|
|
if (LABEL_ALTERNATE_NAME (in_rtx))
|
|
fprintf (outfile, " [alternate name: %s]",
|
|
LABEL_ALTERNATE_NAME (in_rtx));
|
|
break;
|
|
|
|
case CALL_PLACEHOLDER:
|
|
if (debug_call_placeholder_verbose)
|
|
{
|
|
fputs (" (cond [\n (const_string \"normal\") (sequence [", outfile);
|
|
for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
|
|
{
|
|
fputs ("\n ", outfile);
|
|
print_inline_rtx (outfile, tem, 4);
|
|
}
|
|
|
|
tem = XEXP (in_rtx, 1);
|
|
if (tem)
|
|
fputs ("\n ])\n (const_string \"tail_call\") (sequence [",
|
|
outfile);
|
|
for (; tem != 0; tem = NEXT_INSN (tem))
|
|
{
|
|
fputs ("\n ", outfile);
|
|
print_inline_rtx (outfile, tem, 4);
|
|
}
|
|
|
|
tem = XEXP (in_rtx, 2);
|
|
if (tem)
|
|
fputs ("\n ])\n (const_string \"tail_recursion\") (sequence [",
|
|
outfile);
|
|
for (; tem != 0; tem = NEXT_INSN (tem))
|
|
{
|
|
fputs ("\n ", outfile);
|
|
print_inline_rtx (outfile, tem, 4);
|
|
}
|
|
|
|
fputs ("\n ])\n ])", outfile);
|
|
break;
|
|
}
|
|
|
|
for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
|
|
if (GET_CODE (tem) == CALL_INSN)
|
|
{
|
|
fprintf (outfile, " ");
|
|
print_rtx (tem);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (dump_for_graph
|
|
&& (is_insn || GET_CODE (in_rtx) == NOTE
|
|
|| GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
|
|
sawclose = 0;
|
|
else
|
|
{
|
|
fputc (')', outfile);
|
|
sawclose = 1;
|
|
}
|
|
}
|
|
|
|
/* Print an rtx on the current line of FILE. Initially indent IND
|
|
characters. */
|
|
|
|
void
|
|
print_inline_rtx (outf, x, ind)
|
|
FILE *outf;
|
|
rtx x;
|
|
int ind;
|
|
{
|
|
int oldsaw = sawclose;
|
|
int oldindent = indent;
|
|
|
|
sawclose = 0;
|
|
indent = ind;
|
|
outfile = outf;
|
|
print_rtx (x);
|
|
sawclose = oldsaw;
|
|
indent = oldindent;
|
|
}
|
|
|
|
/* Call this function from the debugger to see what X looks like. */
|
|
|
|
void
|
|
debug_rtx (x)
|
|
rtx x;
|
|
{
|
|
outfile = stderr;
|
|
print_rtx (x);
|
|
fprintf (stderr, "\n");
|
|
}
|
|
|
|
/* Count of rtx's to print with debug_rtx_list.
|
|
This global exists because gdb user defined commands have no arguments. */
|
|
|
|
int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
|
|
|
|
/* Call this function to print list from X on.
|
|
|
|
N is a count of the rtx's to print. Positive values print from the specified
|
|
rtx on. Negative values print a window around the rtx.
|
|
EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */
|
|
|
|
void
|
|
debug_rtx_list (x, n)
|
|
rtx x;
|
|
int n;
|
|
{
|
|
int i,count;
|
|
rtx insn;
|
|
|
|
count = n == 0 ? 1 : n < 0 ? -n : n;
|
|
|
|
/* If we are printing a window, back up to the start. */
|
|
|
|
if (n < 0)
|
|
for (i = count / 2; i > 0; i--)
|
|
{
|
|
if (PREV_INSN (x) == 0)
|
|
break;
|
|
x = PREV_INSN (x);
|
|
}
|
|
|
|
for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
|
|
debug_rtx (insn);
|
|
}
|
|
|
|
/* Call this function to print an rtx list from START to END inclusive. */
|
|
|
|
void
|
|
debug_rtx_range (start, end)
|
|
rtx start, end;
|
|
{
|
|
while (1)
|
|
{
|
|
debug_rtx (start);
|
|
if (!start || start == end)
|
|
break;
|
|
start = NEXT_INSN (start);
|
|
}
|
|
}
|
|
|
|
/* Call this function to search an rtx list to find one with insn uid UID,
|
|
and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
|
|
The found insn is returned to enable further debugging analysis. */
|
|
|
|
rtx
|
|
debug_rtx_find (x, uid)
|
|
rtx x;
|
|
int uid;
|
|
{
|
|
while (x != 0 && INSN_UID (x) != uid)
|
|
x = NEXT_INSN (x);
|
|
if (x != 0)
|
|
{
|
|
debug_rtx_list (x, debug_rtx_count);
|
|
return x;
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "insn uid %d not found\n", uid);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* External entry point for printing a chain of insns
|
|
starting with RTX_FIRST onto file OUTF.
|
|
A blank line separates insns.
|
|
|
|
If RTX_FIRST is not an insn, then it alone is printed, with no newline. */
|
|
|
|
void
|
|
print_rtl (outf, rtx_first)
|
|
FILE *outf;
|
|
rtx rtx_first;
|
|
{
|
|
rtx tmp_rtx;
|
|
|
|
outfile = outf;
|
|
sawclose = 0;
|
|
|
|
if (rtx_first == 0)
|
|
{
|
|
fputs (print_rtx_head, outf);
|
|
fputs ("(nil)\n", outf);
|
|
}
|
|
else
|
|
switch (GET_CODE (rtx_first))
|
|
{
|
|
case INSN:
|
|
case JUMP_INSN:
|
|
case CALL_INSN:
|
|
case NOTE:
|
|
case CODE_LABEL:
|
|
case BARRIER:
|
|
for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
|
|
if (! flag_dump_unnumbered
|
|
|| GET_CODE (tmp_rtx) != NOTE || NOTE_LINE_NUMBER (tmp_rtx) < 0)
|
|
{
|
|
fputs (print_rtx_head, outfile);
|
|
print_rtx (tmp_rtx);
|
|
fprintf (outfile, "\n");
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fputs (print_rtx_head, outfile);
|
|
print_rtx (rtx_first);
|
|
}
|
|
}
|
|
|
|
/* Like print_rtx, except specify a file. */
|
|
/* Return nonzero if we actually printed anything. */
|
|
|
|
int
|
|
print_rtl_single (outf, x)
|
|
FILE *outf;
|
|
rtx x;
|
|
{
|
|
outfile = outf;
|
|
sawclose = 0;
|
|
if (! flag_dump_unnumbered
|
|
|| GET_CODE (x) != NOTE || NOTE_LINE_NUMBER (x) < 0)
|
|
{
|
|
fputs (print_rtx_head, outfile);
|
|
print_rtx (x);
|
|
putc ('\n', outf);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Like print_rtl except without all the detail; for example,
|
|
if RTX is a CONST_INT then print in decimal format. */
|
|
|
|
void
|
|
print_simple_rtl (outf, x)
|
|
FILE *outf;
|
|
rtx x;
|
|
{
|
|
flag_simple = 1;
|
|
print_rtl (outf, x);
|
|
flag_simple = 0;
|
|
}
|