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-rw-r--r--gcc/sched-vis.c753
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diff --git a/gcc/sched-vis.c b/gcc/sched-vis.c
new file mode 100644
index 0000000..2012955
--- /dev/null
+++ b/gcc/sched-vis.c
@@ -0,0 +1,753 @@
+/* Instruction scheduling pass.
+ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Contributed by Michael Tiemann (tiemann@cygnus.com) Enhanced by,
+ and currently maintained by, Jim Wilson (wilson@cygnus.com)
+
+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) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 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, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "obstack.h"
+#include "hard-reg-set.h"
+#include "basic-block.h"
+#include "real.h"
+#include "sched-int.h"
+#include "tree-pass.h"
+
+static char *safe_concat (char *, char *, const char *);
+static void print_exp (char *, rtx, int);
+static void print_value (char *, rtx, int);
+static void print_pattern (char *, rtx, int);
+
+#define BUF_LEN 2048
+
+static char *
+safe_concat (char *buf, char *cur, const char *str)
+{
+ char *end = buf + BUF_LEN - 2; /* Leave room for null. */
+ int c;
+
+ if (cur > end)
+ {
+ *end = '\0';
+ return end;
+ }
+
+ while (cur < end && (c = *str++) != '\0')
+ *cur++ = c;
+
+ *cur = '\0';
+ return cur;
+}
+
+/* This recognizes rtx, I classified as expressions. These are always
+ represent some action on values or results of other expression, that
+ may be stored in objects representing values. */
+
+static void
+print_exp (char *buf, rtx x, int verbose)
+{
+ char tmp[BUF_LEN];
+ const char *st[4];
+ char *cur = buf;
+ const char *fun = (char *) 0;
+ const char *sep;
+ rtx op[4];
+ int i;
+
+ for (i = 0; i < 4; i++)
+ {
+ st[i] = (char *) 0;
+ op[i] = NULL_RTX;
+ }
+
+ switch (GET_CODE (x))
+ {
+ case PLUS:
+ op[0] = XEXP (x, 0);
+ if (GET_CODE (XEXP (x, 1)) == CONST_INT
+ && INTVAL (XEXP (x, 1)) < 0)
+ {
+ st[1] = "-";
+ op[1] = GEN_INT (-INTVAL (XEXP (x, 1)));
+ }
+ else
+ {
+ st[1] = "+";
+ op[1] = XEXP (x, 1);
+ }
+ break;
+ case LO_SUM:
+ op[0] = XEXP (x, 0);
+ st[1] = "+low(";
+ op[1] = XEXP (x, 1);
+ st[2] = ")";
+ break;
+ case MINUS:
+ op[0] = XEXP (x, 0);
+ st[1] = "-";
+ op[1] = XEXP (x, 1);
+ break;
+ case COMPARE:
+ fun = "cmp";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case NEG:
+ st[0] = "-";
+ op[0] = XEXP (x, 0);
+ break;
+ case MULT:
+ op[0] = XEXP (x, 0);
+ st[1] = "*";
+ op[1] = XEXP (x, 1);
+ break;
+ case DIV:
+ op[0] = XEXP (x, 0);
+ st[1] = "/";
+ op[1] = XEXP (x, 1);
+ break;
+ case UDIV:
+ fun = "udiv";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case MOD:
+ op[0] = XEXP (x, 0);
+ st[1] = "%";
+ op[1] = XEXP (x, 1);
+ break;
+ case UMOD:
+ fun = "umod";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case SMIN:
+ fun = "smin";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case SMAX:
+ fun = "smax";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case UMIN:
+ fun = "umin";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case UMAX:
+ fun = "umax";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case NOT:
+ st[0] = "!";
+ op[0] = XEXP (x, 0);
+ break;
+ case AND:
+ op[0] = XEXP (x, 0);
+ st[1] = "&";
+ op[1] = XEXP (x, 1);
+ break;
+ case IOR:
+ op[0] = XEXP (x, 0);
+ st[1] = "|";
+ op[1] = XEXP (x, 1);
+ break;
+ case XOR:
+ op[0] = XEXP (x, 0);
+ st[1] = "^";
+ op[1] = XEXP (x, 1);
+ break;
+ case ASHIFT:
+ op[0] = XEXP (x, 0);
+ st[1] = "<<";
+ op[1] = XEXP (x, 1);
+ break;
+ case LSHIFTRT:
+ op[0] = XEXP (x, 0);
+ st[1] = " 0>>";
+ op[1] = XEXP (x, 1);
+ break;
+ case ASHIFTRT:
+ op[0] = XEXP (x, 0);
+ st[1] = ">>";
+ op[1] = XEXP (x, 1);
+ break;
+ case ROTATE:
+ op[0] = XEXP (x, 0);
+ st[1] = "<-<";
+ op[1] = XEXP (x, 1);
+ break;
+ case ROTATERT:
+ op[0] = XEXP (x, 0);
+ st[1] = ">->";
+ op[1] = XEXP (x, 1);
+ break;
+ case ABS:
+ fun = "abs";
+ op[0] = XEXP (x, 0);
+ break;
+ case SQRT:
+ fun = "sqrt";
+ op[0] = XEXP (x, 0);
+ break;
+ case FFS:
+ fun = "ffs";
+ op[0] = XEXP (x, 0);
+ break;
+ case EQ:
+ op[0] = XEXP (x, 0);
+ st[1] = "==";
+ op[1] = XEXP (x, 1);
+ break;
+ case NE:
+ op[0] = XEXP (x, 0);
+ st[1] = "!=";
+ op[1] = XEXP (x, 1);
+ break;
+ case GT:
+ op[0] = XEXP (x, 0);
+ st[1] = ">";
+ op[1] = XEXP (x, 1);
+ break;
+ case GTU:
+ fun = "gtu";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case LT:
+ op[0] = XEXP (x, 0);
+ st[1] = "<";
+ op[1] = XEXP (x, 1);
+ break;
+ case LTU:
+ fun = "ltu";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case GE:
+ op[0] = XEXP (x, 0);
+ st[1] = ">=";
+ op[1] = XEXP (x, 1);
+ break;
+ case GEU:
+ fun = "geu";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case LE:
+ op[0] = XEXP (x, 0);
+ st[1] = "<=";
+ op[1] = XEXP (x, 1);
+ break;
+ case LEU:
+ fun = "leu";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ break;
+ case SIGN_EXTRACT:
+ fun = (verbose) ? "sign_extract" : "sxt";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ op[2] = XEXP (x, 2);
+ break;
+ case ZERO_EXTRACT:
+ fun = (verbose) ? "zero_extract" : "zxt";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ op[2] = XEXP (x, 2);
+ break;
+ case SIGN_EXTEND:
+ fun = (verbose) ? "sign_extend" : "sxn";
+ op[0] = XEXP (x, 0);
+ break;
+ case ZERO_EXTEND:
+ fun = (verbose) ? "zero_extend" : "zxn";
+ op[0] = XEXP (x, 0);
+ break;
+ case FLOAT_EXTEND:
+ fun = (verbose) ? "float_extend" : "fxn";
+ op[0] = XEXP (x, 0);
+ break;
+ case TRUNCATE:
+ fun = (verbose) ? "trunc" : "trn";
+ op[0] = XEXP (x, 0);
+ break;
+ case FLOAT_TRUNCATE:
+ fun = (verbose) ? "float_trunc" : "ftr";
+ op[0] = XEXP (x, 0);
+ break;
+ case FLOAT:
+ fun = (verbose) ? "float" : "flt";
+ op[0] = XEXP (x, 0);
+ break;
+ case UNSIGNED_FLOAT:
+ fun = (verbose) ? "uns_float" : "ufl";
+ op[0] = XEXP (x, 0);
+ break;
+ case FIX:
+ fun = "fix";
+ op[0] = XEXP (x, 0);
+ break;
+ case UNSIGNED_FIX:
+ fun = (verbose) ? "uns_fix" : "ufx";
+ op[0] = XEXP (x, 0);
+ break;
+ case PRE_DEC:
+ st[0] = "--";
+ op[0] = XEXP (x, 0);
+ break;
+ case PRE_INC:
+ st[0] = "++";
+ op[0] = XEXP (x, 0);
+ break;
+ case POST_DEC:
+ op[0] = XEXP (x, 0);
+ st[1] = "--";
+ break;
+ case POST_INC:
+ op[0] = XEXP (x, 0);
+ st[1] = "++";
+ break;
+ case CALL:
+ st[0] = "call ";
+ op[0] = XEXP (x, 0);
+ if (verbose)
+ {
+ st[1] = " argc:";
+ op[1] = XEXP (x, 1);
+ }
+ break;
+ case IF_THEN_ELSE:
+ st[0] = "{(";
+ op[0] = XEXP (x, 0);
+ st[1] = ")?";
+ op[1] = XEXP (x, 1);
+ st[2] = ":";
+ op[2] = XEXP (x, 2);
+ st[3] = "}";
+ break;
+ case TRAP_IF:
+ fun = "trap_if";
+ op[0] = TRAP_CONDITION (x);
+ break;
+ case PREFETCH:
+ fun = "prefetch";
+ op[0] = XEXP (x, 0);
+ op[1] = XEXP (x, 1);
+ op[2] = XEXP (x, 2);
+ break;
+ case UNSPEC:
+ case UNSPEC_VOLATILE:
+ {
+ cur = safe_concat (buf, cur, "unspec");
+ if (GET_CODE (x) == UNSPEC_VOLATILE)
+ cur = safe_concat (buf, cur, "/v");
+ cur = safe_concat (buf, cur, "[");
+ sep = "";
+ for (i = 0; i < XVECLEN (x, 0); i++)
+ {
+ print_pattern (tmp, XVECEXP (x, 0, i), verbose);
+ cur = safe_concat (buf, cur, sep);
+ cur = safe_concat (buf, cur, tmp);
+ sep = ",";
+ }
+ cur = safe_concat (buf, cur, "] ");
+ sprintf (tmp, "%d", XINT (x, 1));
+ cur = safe_concat (buf, cur, tmp);
+ }
+ break;
+ default:
+ /* If (verbose) debug_rtx (x); */
+ st[0] = GET_RTX_NAME (GET_CODE (x));
+ break;
+ }
+
+ /* Print this as a function? */
+ if (fun)
+ {
+ cur = safe_concat (buf, cur, fun);
+ cur = safe_concat (buf, cur, "(");
+ }
+
+ for (i = 0; i < 4; i++)
+ {
+ if (st[i])
+ cur = safe_concat (buf, cur, st[i]);
+
+ if (op[i])
+ {
+ if (fun && i != 0)
+ cur = safe_concat (buf, cur, ",");
+
+ print_value (tmp, op[i], verbose);
+ cur = safe_concat (buf, cur, tmp);
+ }
+ }
+
+ if (fun)
+ cur = safe_concat (buf, cur, ")");
+} /* print_exp */
+
+/* Prints rtxes, I customarily classified as values. They're constants,
+ registers, labels, symbols and memory accesses. */
+
+static void
+print_value (char *buf, rtx x, int verbose)
+{
+ char t[BUF_LEN];
+ char *cur = buf;
+
+ switch (GET_CODE (x))
+ {
+ case CONST_INT:
+ sprintf (t, HOST_WIDE_INT_PRINT_HEX, INTVAL (x));
+ cur = safe_concat (buf, cur, t);
+ break;
+ case CONST_DOUBLE:
+ if (FLOAT_MODE_P (GET_MODE (x)))
+ real_to_decimal (t, CONST_DOUBLE_REAL_VALUE (x), sizeof (t), 0, 1);
+ else
+ sprintf (t, "<0x%lx,0x%lx>", (long) CONST_DOUBLE_LOW (x), (long) CONST_DOUBLE_HIGH (x));
+ cur = safe_concat (buf, cur, t);
+ break;
+ case CONST_STRING:
+ cur = safe_concat (buf, cur, "\"");
+ cur = safe_concat (buf, cur, XSTR (x, 0));
+ cur = safe_concat (buf, cur, "\"");
+ break;
+ case SYMBOL_REF:
+ cur = safe_concat (buf, cur, "`");
+ cur = safe_concat (buf, cur, XSTR (x, 0));
+ cur = safe_concat (buf, cur, "'");
+ break;
+ case LABEL_REF:
+ sprintf (t, "L%d", INSN_UID (XEXP (x, 0)));
+ cur = safe_concat (buf, cur, t);
+ break;
+ case CONST:
+ print_value (t, XEXP (x, 0), verbose);
+ cur = safe_concat (buf, cur, "const(");
+ cur = safe_concat (buf, cur, t);
+ cur = safe_concat (buf, cur, ")");
+ break;
+ case HIGH:
+ print_value (t, XEXP (x, 0), verbose);
+ cur = safe_concat (buf, cur, "high(");
+ cur = safe_concat (buf, cur, t);
+ cur = safe_concat (buf, cur, ")");
+ break;
+ case REG:
+ if (REGNO (x) < FIRST_PSEUDO_REGISTER)
+ {
+ int c = reg_names[REGNO (x)][0];
+ if (ISDIGIT (c))
+ cur = safe_concat (buf, cur, "%");
+
+ cur = safe_concat (buf, cur, reg_names[REGNO (x)]);
+ }
+ else
+ {
+ sprintf (t, "r%d", REGNO (x));
+ cur = safe_concat (buf, cur, t);
+ }
+ if (verbose
+#ifdef INSN_SCHEDULING
+ && !current_sched_info
+#endif
+ )
+ {
+ sprintf (t, ":%s", GET_MODE_NAME (GET_MODE (x)));
+ cur = safe_concat (buf, cur, t);
+ }
+ break;
+ case SUBREG:
+ print_value (t, SUBREG_REG (x), verbose);
+ cur = safe_concat (buf, cur, t);
+ sprintf (t, "#%d", SUBREG_BYTE (x));
+ cur = safe_concat (buf, cur, t);
+ break;
+ case SCRATCH:
+ cur = safe_concat (buf, cur, "scratch");
+ break;
+ case CC0:
+ cur = safe_concat (buf, cur, "cc0");
+ break;
+ case PC:
+ cur = safe_concat (buf, cur, "pc");
+ break;
+ case MEM:
+ print_value (t, XEXP (x, 0), verbose);
+ cur = safe_concat (buf, cur, "[");
+ cur = safe_concat (buf, cur, t);
+ cur = safe_concat (buf, cur, "]");
+ break;
+ default:
+ print_exp (t, x, verbose);
+ cur = safe_concat (buf, cur, t);
+ break;
+ }
+} /* print_value */
+
+/* The next step in insn detalization, its pattern recognition. */
+
+static void
+print_pattern (char *buf, rtx x, int verbose)
+{
+ char t1[BUF_LEN], t2[BUF_LEN], t3[BUF_LEN];
+
+ switch (GET_CODE (x))
+ {
+ case SET:
+ 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);
+#ifdef INSN_SCHEDULING
+ if (verbose && current_sched_info)
+ sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (x, 1),
+ t);
+ else
+#endif
+ sprintf (buf, " %4d %s", INSN_UID (x), t);
+ break;
+ case JUMP_INSN:
+ print_pattern (t, PATTERN (x), verbose);
+#ifdef INSN_SCHEDULING
+ if (verbose && current_sched_info)
+ sprintf (buf, "%s: jump %s", (*current_sched_info->print_insn) (x, 1),
+ t);
+ else
+#endif
+ 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 <...>");
+#ifdef INSN_SCHEDULING
+ if (verbose && current_sched_info)
+ sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (x, 1), t);
+ else
+#endif
+ 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:
+ sprintf (buf, "i%4d <What %s?>", INSN_UID (x),
+ GET_RTX_NAME (GET_CODE (x)));
+ }
+} /* print_insn */
+
+
+/* Emit a slim dump of X (an insn) to the file F, including any register
+ note attached to the instruction. */
+void
+dump_insn_slim (FILE *f, rtx x)
+{
+ char t[BUF_LEN + 32];
+ rtx note;
+
+ print_insn (t, x, 1);
+ fputs (t, f);
+ putc ('\n', f);
+ if (INSN_P (x) && REG_NOTES (x))
+ for (note = REG_NOTES (x); note; note = XEXP (note, 1))
+ {
+ print_value (t, XEXP (note, 0), 1);
+ fprintf (f, " %s: %s\n",
+ GET_REG_NOTE_NAME (REG_NOTE_KIND (note)), t);
+ }
+}
+
+/* Emit a slim dump of X (an insn) to stderr. */
+void
+debug_insn_slim (rtx x)
+{
+ dump_insn_slim (stderr, x);
+}
+
+/* Provide a slim dump the instruction chain starting at FIRST to F, honoring
+ the dump flags given in FLAGS. Currently, TDF_BLOCKS and TDF_DETAILS
+ include more information on the basic blocks. */
+void
+print_rtl_slim_with_bb (FILE *f, rtx first, int flags)
+{
+ basic_block current_bb = NULL;
+ rtx insn;
+
+ for (insn = first; NULL != insn; insn = NEXT_INSN (insn))
+ {
+ if ((flags & TDF_BLOCKS)
+ && (INSN_P (insn) || GET_CODE (insn) == NOTE)
+ && BLOCK_FOR_INSN (insn)
+ && !current_bb)
+ {
+ current_bb = BLOCK_FOR_INSN (insn);
+ dump_bb_info (current_bb, true, false, flags, ";; ", f);
+ }
+
+ dump_insn_slim (f, insn);
+
+ if ((flags & TDF_BLOCKS)
+ && current_bb
+ && insn == BB_END (current_bb))
+ {
+ dump_bb_info (current_bb, false, true, flags, ";; ", f);
+ current_bb = NULL;
+ }
+ }
+}
+
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