re PR tree-optimization/51903 (ICE: in gimple_purge_all_dead_eh_edges, at…

re PR tree-optimization/51903 (ICE: in gimple_purge_all_dead_eh_edges, at tree-cfg.c:7196 with -fnon-call-exceptions)

2012-01-20  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/51903
	* tree-ssa-pre.c (eliminate): Properly purging of EH edges
	when removing stmts.

	* g++.dg/torture/pr51903.C: New testcase.

From-SVN: r183329

gcc/ChangeLog

+2012-01-20  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/51903
+	* tree-ssa-pre.c (eliminate): Properly purging of EH edges
+	when removing stmts.
+
 2012-01-20  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>
 
 	PR target/50313

gcc/testsuite/ChangeLog

+2012-01-20  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/51903
+	* g++.dg/torture/pr51903.C: New testcase.
+
 2012-01-20  Tobias Burnus  <burnus@net-b.de>
 	    Janus Weil  <janus@gcc.gnu.org>
 

gcc/testsuite/g++.dg/torture/pr51903.C

+// { dg-do compile }
+// { dg-options "-O2 -fnon-call-exceptions -fno-guess-branch-probability" }
+
+#include <vector>
+
+void foo ()
+{
+  std::vector < std::vector< int > > (20000);
+}

gcc/tree-ssa-pre.c

@@ -4541,8 +4541,10 @@ eliminate (void)
 	  gsi = gsi_for_stmt (stmt);
 	  unlink_stmt_vdef (stmt);
 	  gsi_remove (&gsi, true);
-	  if (gimple_purge_dead_eh_edges (bb))
-	    todo |= TODO_cleanup_cfg;
+	  /* ???  gsi_remove doesn't tell us whether the stmt was
+	     in EH tables and thus whether we need to purge EH edges.
+	     Simply schedule the block for a cleanup.  */
+	  bitmap_set_bit (need_eh_cleanup, bb->index);
 	  if (TREE_CODE (lhs) == SSA_NAME)
 	    bitmap_clear_bit (inserted_exprs, SSA_NAME_VERSION (lhs));
 	  release_defs (stmt);