calls.c (expand_call): Try to do a tail call for thunks at -O0 too.

	* calls.c (expand_call): Try to do a tail call for thunks at -O0 too.
	* cgraph.h (struct cgraph_thunk_info): Add indirect_offset.
	(cgraph_node::create_thunk): Add indirect_offset parameter.
	(thunk_adjust): Likewise.
	* cgraph.c (cgraph_node::create_thunk): Add indirect_offset parameter
	and initialize the corresponding field with it.
	(cgraph_node::dump): Dump indirect_offset field.
	* cgraphclones.c (duplicate_thunk_for_node): Deal with indirect_offset.
	* cgraphunit.c (cgraph_node::analyze): Be prepared for external thunks.
	(thunk_adjust): Add indirect_offset parameter and deal with it.
	(cgraph_node::expand_thunk): Deal with the indirect_offset field and
	pass it to thunk_adjust.  Do not call the target hook if it's non-zero
	or if the thunk is external or local.  Fix formatting.  Do not chain
	the RESULT_DECL to BLOCK_VARS.  Pass the static chain to the target,
	if any, in the GIMPLE representation.
	* ipa-icf.c (sem_function::equals_wpa): Deal with indirect_offset.
	* lto-cgraph.c (lto_output_node): Write indirect_offset field.
	(input_node): Read indirect_offset field.
	* tree-inline.c (expand_call_inline): Pass indirect_offset field in the
	call to thunk_adjust.
	* tree-nested.c (struct nesting_info): Add thunk_p field.
	(create_nesting_tree): Set it.
	(convert_all_function_calls): Copy static chain from targets to thunks.
	(finalize_nesting_tree_1): Return early for thunks.
	(unnest_nesting_tree_1): Do not finalize thunks.
	(gimplify_all_functions): Do not gimplify thunks.
cp/
	* method.c (use_thunk): Adjust call to cgraph_node::create_thunk.
ada/
	* gcc-interface/decl.c (is_cplusplus_method): Do not require C++
	convention on Interfaces.
	* gcc-interface/trans.c (Subprogram_Body_to_gnu): Try to create a
	bona-fide thunk and hand it over to the middle-end.
	(get_controlling_type): New function.
	(use_alias_for_thunk_p): Likewise.
	(thunk_labelno): New static variable.
	(make_covariant_thunk): New function.
	(maybe_make_gnu_thunk): Likewise.
	* gcc-interface/utils.c (finish_subprog_decl): Set DECL_CONTEXT of the
	result DECL here instead of...
	(end_subprog_body): ...here.

Co-Authored-By: Pierre-Marie de Rodat <derodat@adacore.com>

From-SVN: r264701

1 files changed, 5 insertions, 2 deletions

diff --git a/gcc/cgraph.c b/gcc/cgraph.c
index 148f29e..8a03f3d 100644
--- a/gcc/cgraph.c
+++ b/gcc/cgraph.c
@@ -617,6 +617,7 @@ cgraph_node *
 cgraph_node::create_thunk (tree alias, tree, bool this_adjusting,
 			   HOST_WIDE_INT fixed_offset,
 			   HOST_WIDE_INT virtual_value,
+			   HOST_WIDE_INT indirect_offset,
 			   tree virtual_offset,
 			   tree real_alias)
 {
@@ -635,6 +636,7 @@ cgraph_node::create_thunk (tree alias, tree, bool this_adjusting,
 
   node->thunk.fixed_offset = fixed_offset;
   node->thunk.virtual_value = virtual_value;
+  node->thunk.indirect_offset = indirect_offset;
   node->thunk.alias = real_alias;
   node->thunk.this_adjusting = this_adjusting;
   node->thunk.virtual_offset_p = virtual_offset != NULL;
@@ -2099,10 +2101,11 @@ cgraph_node::dump (FILE *f)
         fprintf (f, "  of %s (asm: %s)",
 		 lang_hooks.decl_printable_name (thunk.alias, 2),
 		 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (thunk.alias)));
-      fprintf (f, " fixed offset %i virtual value %i has "
-	       "virtual offset %i)\n",
+      fprintf (f, " fixed offset %i virtual value %i indirect_offset %i "
+		  "has virtual offset %i\n",
 	       (int)thunk.fixed_offset,
 	       (int)thunk.virtual_value,
+	       (int)thunk.indirect_offset,
 	       (int)thunk.virtual_offset_p);
     }
   if (alias && thunk.alias