re PR middle-end/32018 (ICE on optimization)

	PR middle-end/32018
	* tree-ssa-threadupdate.c (thread_through_loop_header): Use
	set_loop_copy.
	(thread_through_all_blocks): Call initialize_original_copy_tables
	and free_original_copy_tables.
	* cfgloopmanip.c (duplicate_loop, duplicate_loop_to_header_edge):
	Use set_loop_copy.
	* tree-cfg.c (tree_duplicate_sese_region): Ditto.
	* cfghooks.c (duplicate_block): Use get_loop_copy.
	* cfg.c: Include cfgloop.h.
	(loop_copy): New hash table.
	(initialize_original_copy_tables): Initialize loop_copy table.
	(free_original_copy_tables): Free loop_copy table.
	(copy_original_table_clear, copy_original_table_set,
	set_loop_copy, get_loop_copy): New functions.
	(set_bb_original, set_bb_copy): Use copy_original_table_set.
	* cfgloop.h (struct loop): Remove copy field.
	* Makefile.in (cfg.o): Add CFGLOOP_H dependency.
	* basic-block.h (set_loop_copy, get_loop_copy): Declare.

From-SVN: r125024

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 15beeab..83ab930 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -4360,14 +4360,14 @@ tree_duplicate_sese_region (edge entry, edge exit,
 	return false;
     }
 
-  loop->copy = loop;
+  set_loop_copy (loop, loop);
 
   /* In case the function is used for loop header copying (which is the primary
      use), ensure that EXIT and its copy will be new latch and entry edges.  */
   if (loop->header == entry->dest)
     {
       copying_header = true;
-      loop->copy = loop_outer (loop);
+      set_loop_copy (loop, loop_outer (loop));
 
       if (!dominated_by_p (CDI_DOMINATORS, loop->latch, exit->src))
 	return false;