backport: [multiple changes]

2014-05-07  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	2013-11-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/59334
	* tree-ssa-dce.c (eliminate_unnecessary_stmts): Fix bug
	in previous commit.

	2013-11-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/59330
	* tree-ssa-dce.c (eliminate_unnecessary_stmts): Simplify
	and fix delayed marking of free calls not necessary.

	* gcc.dg/torture/pr59330.c: New testcase.

	2014-01-09  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/59715
	* tree-cfg.h (split_critical_edges): Declare.
	* tree-cfg.c (split_critical_edges): Export.
	* tree-ssa-sink.c (execute_sink_code): Split critical edges.

	* gcc.dg/torture/pr59715.c: New testcase.

From-SVN: r210147

diff --git a/gcc/tree-flow.h b/gcc/tree-flow.h
index 319be2bb6184d092e45be2f53df4a6ff7bb8b0cb..d39abbe5f77c5dbf7430f504e5343cf9bc28b253 100644 (file)
--- a/gcc/tree-flow.h
+++ b/gcc/tree-flow.h
@@ -466,6 +466,7 @@ extern basic_block move_sese_region_to_fn (struct function *, basic_block,
                                           basic_block, tree);
 void remove_edge_and_dominated_blocks (edge);
 bool tree_node_can_be_shared (tree);
+extern unsigned int split_critical_edges (void);
 
 /* In tree-cfgcleanup.c  */
 extern bitmap cfgcleanup_altered_bbs;