re PR lto/47788 (New LTO failures)

2012-10-04  Richard Guenther  <rguenther@suse.de>

	PR lto/47788
	* tree-streamer-out.c (write_ts_block_tree_pointers): For
	inlined functions outer scopes write the ultimate origin
	as BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION.
	Do not stream the fragment chains.
	* tree-streamer-in.c (lto_input_ts_block_tree_pointers): Likewise.
	* dwarf2out.c (gen_subprogram_die): Handle NULL DECL_INITIAL.
	(dwarf2out_decl): Always output DECL_ABSTRACT function decls.

From-SVN: r192075

1 files changed, 21 insertions, 10 deletions

diff --git a/gcc/tree-streamer-out.c b/gcc/tree-streamer-out.c
index 63f7a02..4fccd77 100644
--- a/gcc/tree-streamer-out.c
+++ b/gcc/tree-streamer-out.c
@@ -685,21 +685,32 @@ write_ts_exp_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 static void
 write_ts_block_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 {
-  /* Do not stream BLOCK_SOURCE_LOCATION.  We cannot handle debug information
-     for early inlining so drop it on the floor instead of ICEing in
-     dwarf2out.c.  */
   streamer_write_chain (ob, BLOCK_VARS (expr), ref_p);
 
+  stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
+
+  /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
+     the limited cases we can handle - those that represent inlined
+     function scopes.  For the rest them on the floor instead of ICEing in
+     dwarf2out.c.  */
+  if (inlined_function_outer_scope_p (expr))
+    {
+      tree ultimate_origin = block_ultimate_origin (expr);
+      stream_write_tree (ob, ultimate_origin, ref_p);
+      lto_output_location (ob, BLOCK_SOURCE_LOCATION (expr));
+    }
+  else
+    {
+      stream_write_tree (ob, NULL_TREE, ref_p);
+      lto_output_location (ob, UNKNOWN_LOCATION);
+    }
   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
-     for early inlining so drop it on the floor instead of ICEing in
+     for early inlined BLOCKs so drop it on the floor instead of ICEing in
      dwarf2out.c.  */
 
-  stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
-  /* Do not stream BLOCK_ABSTRACT_ORIGIN.  We cannot handle debug information
-     for early inlining so drop it on the floor instead of ICEing in
-     dwarf2out.c.  */
-  stream_write_tree (ob, BLOCK_FRAGMENT_ORIGIN (expr), ref_p);
-  stream_write_tree (ob, BLOCK_FRAGMENT_CHAIN (expr), ref_p);
+  /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
+     streaming time.  */
+
   /* Do not output BLOCK_SUBBLOCKS.  Instead on streaming-in this
      list is re-constructed from BLOCK_SUPERCONTEXT.  */
 }