21f0717ab1
PR tree-optimization/67892
* tree-ssa-threadedge.c (simplify_controL_stmt_condition): Fix typo
in comment.
(thread_through_normal_block): If we have seen a backedge, then
do nothing. No longer call find_jump_threads_backwards here.
(thread_across_edge): Use find_jump_threads_backwards to find
jump threads if the old style threader was not successful.
* tree-ssa-threadbackward.c (get_gimple_control_stmt): Use
gsi_last_nondebug_bb. Return NULL if the block does not end
with a control statement.
(find_jump_threads_backwards): Setup code moved here from
tree-ssa-threadedge.c::thread_through_normal_block. Accept
single edge argument instead of name & block.
* tree-ssa-threadbackward.h (find_jump_threads_backwards): Update
prototype.
PR tree-optimization/67892
* gcc.dg/tree-ssa/pr21417: Update expected output.
* gcc.dg/tree-ssa/ssa-dom-thread-2b.c: Likewise.
From-SVN: r229538
25 lines
886 B
C
25 lines
886 B
C
/* Header file for SSA dominator optimizations.
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Copyright (C) 2013-2015 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 3, 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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_TREE_SSA_THREADFSM_H
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#define GCC_TREE_SSA_THREADFSM_H
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extern void find_jump_threads_backwards (edge);
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#endif /* GCC_TREE_SSA_THREADFSM_H */
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