tree-ssa-threadupdate.c (thread_through_all_blocks): Record that the loop structures may need fixing.
* tree-ssa-threadupdate.c (thread_through_all_blocks): Record that the loop structures may need fixing. * tree-cfgcleanup.c (cleanup_tree_cfg_noloop, repair_loop_structures): New functions. (cleanup_tree_cfg_loop): Removed. (cleanup_tree_cfg): If loops need fixing, call repair_loop_structures. * tree-predcom.c (tree_predictive_commoning): Return TODO_cleanup_cfg instead of running cleanup_tree_cfg_loop. * cfgloop.h (LOOPS_NEED_FIXUP): New constant. * tree-flow.h (cleanup_tree_cfg_loop): Declaration removed. (tree_predictive_commoning): Declaration changed. * passes.c (execute_function_todo): Do not use cleanup_tree_cfg_loop. From-SVN: r127118
This commit is contained in:
parent
46cb04410d
commit
592c303da8
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@ -1,3 +1,18 @@
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2007-08-01 Zdenek Dvorak <ook@ucw.cz>
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* tree-ssa-threadupdate.c (thread_through_all_blocks): Record that
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the loop structures may need fixing.
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* tree-cfgcleanup.c (cleanup_tree_cfg_noloop, repair_loop_structures):
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New functions.
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(cleanup_tree_cfg_loop): Removed.
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(cleanup_tree_cfg): If loops need fixing, call repair_loop_structures.
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* tree-predcom.c (tree_predictive_commoning): Return TODO_cleanup_cfg
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instead of running cleanup_tree_cfg_loop.
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* cfgloop.h (LOOPS_NEED_FIXUP): New constant.
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* tree-flow.h (cleanup_tree_cfg_loop): Declaration removed.
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(tree_predictive_commoning): Declaration changed.
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* passes.c (execute_function_todo): Do not use cleanup_tree_cfg_loop.
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2007-08-01 Zdenek Dvorak <ook@ucw.cz>
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* doc/invoke.texi (l1-cache-size): Update documentation.
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@ -170,7 +170,8 @@ enum
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LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS = 4,
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LOOPS_HAVE_RECORDED_EXITS = 8,
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LOOPS_MAY_HAVE_MULTIPLE_LATCHES = 16,
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LOOP_CLOSED_SSA = 32
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LOOP_CLOSED_SSA = 32,
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LOOPS_NEED_FIXUP = 64
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};
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#define LOOPS_NORMAL (LOOPS_HAVE_PREHEADERS | LOOPS_HAVE_SIMPLE_LATCHES \
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@ -891,12 +891,7 @@ execute_function_todo (void *data)
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/* Always cleanup the CFG before trying to update SSA. */
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if (flags & TODO_cleanup_cfg)
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{
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bool cleanup;
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if (current_loops)
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cleanup = cleanup_tree_cfg_loop ();
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else
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cleanup = cleanup_tree_cfg ();
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bool cleanup = cleanup_tree_cfg ();
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if (cleanup && (cfun->curr_properties & PROP_ssa))
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flags |= TODO_remove_unused_locals;
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@ -596,8 +596,8 @@ cleanup_tree_cfg_1 (void)
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/* Remove unreachable blocks and other miscellaneous clean up work.
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Return true if the flowgraph was modified, false otherwise. */
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bool
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cleanup_tree_cfg (void)
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static bool
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cleanup_tree_cfg_noloop (void)
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{
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bool changed;
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@ -632,34 +632,47 @@ cleanup_tree_cfg (void)
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timevar_pop (TV_TREE_CLEANUP_CFG);
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if (changed && current_loops)
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current_loops->state |= LOOPS_NEED_FIXUP;
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return changed;
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}
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/* Repairs loop structures. */
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static void
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repair_loop_structures (void)
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{
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bitmap changed_bbs = BITMAP_ALLOC (NULL);
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fix_loop_structure (changed_bbs);
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/* This usually does nothing. But sometimes parts of cfg that originally
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were inside a loop get out of it due to edge removal (since they
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become unreachable by back edges from latch). */
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if ((current_loops->state & LOOP_CLOSED_SSA) != 0)
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rewrite_into_loop_closed_ssa (changed_bbs, TODO_update_ssa);
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BITMAP_FREE (changed_bbs);
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#ifdef ENABLE_CHECKING
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verify_loop_structure ();
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#endif
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scev_reset ();
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current_loops->state &= ~LOOPS_NEED_FIXUP;
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}
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/* Cleanup cfg and repair loop structures. */
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bool
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cleanup_tree_cfg_loop (void)
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cleanup_tree_cfg (void)
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{
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bool changed = cleanup_tree_cfg ();
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bool changed = cleanup_tree_cfg_noloop ();
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if (changed && current_loops != NULL)
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{
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bitmap changed_bbs = BITMAP_ALLOC (NULL);
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fix_loop_structure (changed_bbs);
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if (current_loops != NULL
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&& (current_loops->state & LOOPS_NEED_FIXUP))
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repair_loop_structures ();
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/* This usually does nothing. But sometimes parts of cfg that originally
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were inside a loop get out of it due to edge removal (since they
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become unreachable by back edges from latch). */
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if ((current_loops->state & LOOP_CLOSED_SSA) != 0)
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rewrite_into_loop_closed_ssa (changed_bbs, TODO_update_ssa);
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BITMAP_FREE (changed_bbs);
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#ifdef ENABLE_CHECKING
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verify_loop_structure ();
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#endif
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scev_reset ();
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}
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return changed;
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}
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@ -783,7 +783,6 @@ void remove_edge_and_dominated_blocks (edge);
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/* In tree-cfgcleanup.c */
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extern bitmap cfgcleanup_altered_bbs;
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extern bool cleanup_tree_cfg (void);
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extern bool cleanup_tree_cfg_loop (void);
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/* In tree-pretty-print.c. */
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extern void dump_generic_bb (FILE *, basic_block, int, int);
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@ -975,7 +974,7 @@ unsigned int tree_unroll_loops_completely (bool);
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unsigned int tree_ssa_prefetch_arrays (void);
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unsigned int remove_empty_loops (void);
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void tree_ssa_iv_optimize (void);
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void tree_predictive_commoning (void);
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unsigned tree_predictive_commoning (void);
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bool number_of_iterations_exit (struct loop *, edge,
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struct tree_niter_desc *niter, bool);
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@ -2582,12 +2582,13 @@ end: ;
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/* Runs predictive commoning. */
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void
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unsigned
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tree_predictive_commoning (void)
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{
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bool unrolled = false;
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struct loop *loop;
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loop_iterator li;
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unsigned ret = 0;
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initialize_original_copy_tables ();
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FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
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@ -2598,7 +2599,9 @@ tree_predictive_commoning (void)
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if (unrolled)
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{
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scev_reset ();
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cleanup_tree_cfg_loop ();
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ret = TODO_cleanup_cfg;
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}
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free_original_copy_tables ();
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return ret;
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}
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@ -1076,6 +1076,9 @@ thread_through_all_blocks (bool may_peel_loop_headers)
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VEC_free (edge, heap, threaded_edges);
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threaded_edges = NULL;
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if (retval)
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current_loops->state |= LOOPS_NEED_FIXUP;
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return retval;
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}
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