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+/* Flags on basic blocks and edges.
+ Copyright (C) 2012-2013 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, 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 COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+/* This file defines flags that may appear on basic blocks or on
+ edges. Source files define DEF_BASIC_BLOCK_FLAG or DEF_EDGE_FLAG
+ appropriately before including this file. */
+
+#if !defined(DEF_BASIC_BLOCK_FLAG) && !defined(DEF_EDGE_FLAG)
+#error "You must define DEF_BASIC_BLOCK_FLAG or DEF_EDGE_FLAG"
+#endif
+
+#ifdef DEF_BASIC_BLOCK_FLAG
+
+/* Masks for basic_block.flags.
+
+ The format of this file is: DEF_BASIC_BLOCK_FLAG(NAME, IDX).
+ NAME is the name of the basic block flag. A flag BB_#NAME will be
+ created and the name is used in dump_edge_info.
+ IDX is a sequence number that is used to determine the value
+ of the flag, which is 1 << IDX).
+
+ BB_HOT_PARTITION and BB_COLD_PARTITION should be preserved throughout
+ the compilation, so they are never cleared.
+
+ All other flags may be cleared by clear_bb_flags(). It is generally
+ a bad idea to rely on any flags being up-to-date. */
+
+/* Only set on blocks that have just been created by create_bb. */
+DEF_BASIC_BLOCK_FLAG(NEW, 0)
+
+/* Set by find_unreachable_blocks. Do not rely on this being set in any
+ pass. */
+DEF_BASIC_BLOCK_FLAG(REACHABLE, 1)
+
+/* Set for blocks in an irreducible loop by loop analysis. */
+DEF_BASIC_BLOCK_FLAG(IRREDUCIBLE_LOOP, 2)
+
+/* Set on blocks that may actually not be single-entry single-exit block. */
+DEF_BASIC_BLOCK_FLAG(SUPERBLOCK, 3)
+
+/* Set on basic blocks that the scheduler should not touch. This is used
+ by SMS to prevent other schedulers from messing with the loop schedule. */
+DEF_BASIC_BLOCK_FLAG(DISABLE_SCHEDULE, 4)
+
+/* Set on blocks that should be put in a hot section. */
+DEF_BASIC_BLOCK_FLAG(HOT_PARTITION, 5)
+
+/* Set on blocks that should be put in a cold section. */
+DEF_BASIC_BLOCK_FLAG(COLD_PARTITION, 6)
+
+/* Set on block that was duplicated. */
+DEF_BASIC_BLOCK_FLAG(DUPLICATED, 7)
+
+/* Set if the label at the top of this block is the target of a non-local goto. */
+DEF_BASIC_BLOCK_FLAG(NON_LOCAL_GOTO_TARGET, 8)
+
+/* Set on blocks that are in RTL format. */
+DEF_BASIC_BLOCK_FLAG(RTL, 9)
+
+/* Set on blocks that are forwarder blocks.
+ Only used in cfgcleanup.c. */
+DEF_BASIC_BLOCK_FLAG(FORWARDER_BLOCK, 10)
+
+/* Set on blocks that cannot be threaded through.
+ Only used in cfgcleanup.c. */
+DEF_BASIC_BLOCK_FLAG(NONTHREADABLE_BLOCK, 11)
+
+/* Set on blocks that were modified in some way. This bit is set in
+ df_set_bb_dirty, but not cleared by df_analyze, so it can be used
+ to test whether a block has been modified prior to a df_analyze call. */
+DEF_BASIC_BLOCK_FLAG(MODIFIED, 12)
+
+/* A general visited flag for passes to use. */
+DEF_BASIC_BLOCK_FLAG(VISITED, 13)
+
+/* Set on blocks that are in a transaction. This is calculated on
+ demand, and is available after calling compute_transaction_bits(). */
+DEF_BASIC_BLOCK_FLAG(IN_TRANSACTION, 14)
+
+#endif
+
+#ifdef DEF_EDGE_FLAG
+
+/* Masks for edge.flags.
+
+ The format of this file is: DEF_EDGE_FLAG(NAME, IDX, STRING).
+ NAME is the name of the edge flag. A flag EDGE_#NAME will be
+ created and the name is used in dump_edge_info.
+ IDX is a sequence number that is used to determine the value
+ of the flag, which is 1 << IDX). */
+
+/* 'Straight line' flow. In GIMPLE and in cfglayout mode, all normal
+ edges are fallthru edges. In cfgrtl mode, this flag really means
+ that control flow falls through to the next basic block in the line. */
+DEF_EDGE_FLAG(FALLTHRU, 0)
+
+/* Strange flow, like a computed jump or exception handling. Usually
+ this means that the edge cannot be split. */
+DEF_EDGE_FLAG(ABNORMAL, 1)
+
+/* Edge out of a basic block that ends with a CALL_INSN with abnormal
+ exit, like an exception or a non-local goto.
+ ABNORMAL_CALL edges also have ABNORMAL set.
+ This flag is only used for the RTL CFG. */
+DEF_EDGE_FLAG(ABNORMAL_CALL, 2)
+
+/* Exception edge. Exception handling edges represent possible control
+ transfers from a trapping instruction to an exception handler.
+ EH edges also have ABNORMAL set for the RTL CFG. */
+DEF_EDGE_FLAG(EH, 3)
+
+/* Never merge blocks via this edge. This is used for exception handling,
+ to prevent merging away edges to the post-landing-pad basic block.
+ This flag is only used for the RTL CFG. */
+DEF_EDGE_FLAG(PRESERVE, 4)
+
+/* Not a real edge. This is used to connect parts of the CFG that do
+ not halt, such as infinite loops and noreturn functions, to the
+ EXIT_BLOCK, so that traversing of the reverse CFG is possible. */
+DEF_EDGE_FLAG(FAKE, 5)
+
+/* A back edge, marked in a depth-first search of the CFG. Back edges
+ are hints that this edge may be part of a loop in the CFG. */
+DEF_EDGE_FLAG(DFS_BACK, 6)
+
+/* Edge in a part of the CFG that is an irreducible loop. */
+DEF_EDGE_FLAG(IRREDUCIBLE_LOOP, 7)
+
+/* Edge taken when controlling predicate is nonzero.
+ This is only used for the GIMPLE CFG. */
+DEF_EDGE_FLAG(TRUE_VALUE, 8)
+
+/* Edge taken when controlling predicate is zero.
+ This is only used for the GIMPLE CFG. */
+DEF_EDGE_FLAG(FALSE_VALUE, 9)
+
+/* Edge is executable. This is only used in GIMPLE SSA-CCP and VRP.
+ This is only used for the GIMPLE CFG. */
+DEF_EDGE_FLAG(EXECUTABLE, 10)
+
+/* Edge crosses between hot and cold sections, when we do partitioning.
+ This flag is only used for the RTL CFG. */
+DEF_EDGE_FLAG(CROSSING, 11)
+
+/* Edge from a sibcall CALL_INSN to exit.
+ SIBCALL edges also have ABNORMAL set.
+ This flag is only used for the RTL CFG. */
+DEF_EDGE_FLAG(SIBCALL, 12)
+
+/* Candidate for straight line flow. Only used in bb-reorder.c.
+ This flag is only used for the RTL CFG. */
+DEF_EDGE_FLAG(CAN_FALLTHRU, 13)
+
+/* Exit of a loop. This is only used in ifcvt.c.
+ This flag is only used for the RTL CFG. */
+DEF_EDGE_FLAG(LOOP_EXIT, 14)
+
+/* Uninstrumented edge out of a GIMPLE_TRANSACTION statement. */
+DEF_EDGE_FLAG(TM_UNINSTRUMENTED, 15)
+
+/* Abort (over) edge out of a GIMPLE_TRANSACTION statement. */
+DEF_EDGE_FLAG(TM_ABORT, 16)
+
+#endif
+
+/*
+Local variables:
+mode:c
+End:
+*/