re PR lto/48492 (LTO bootstrap failure in copy_constant)

	PR lto/48492
	* cfgexpand.c (expand_debug_expr) <VAR_DECL>: Return NULL for a
	DECL_IN_CONSTANT_POOL without RTL.

From-SVN: r172641

gcc/ChangeLog

+2011-04-18  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR lto/48492
+	* cfgexpand.c (expand_debug_expr) <VAR_DECL>: Return NULL for a
+	DECL_IN_CONSTANT_POOL without RTL.
+
 2011-04-18  Ulrich Weigand  <ulrich.weigand@linaro.org>
 	    Ira Rosen  <ira.rosen@linaro.org>
 
@@ -28,7 +34,8 @@
 2011-04-17  Jan Hubicka  <jh@suse.cz>
 
 	* cgrpah.h (struct cgraph_node): Remove finalized_by_frontend.
-	* cgrpahunit.c (cgraph_finalize_function): Do not set finalized_by_frontend.
+	* cgrpahunit.c (cgraph_finalize_function): Do not set
+	finalized_by_frontend.
 	* lto-cgraph.c (lto_output_node, input_overwrite_node): Do not stream
 	finalized_by_frontend.
 
@@ -37,7 +44,8 @@
 	* cgraph.c (cgraph_clone_node): Do not handle vtable_method
 	* cgraph.h (struct cgraph_local_info): Drop vtable_method.
 	* cgraphunit.c (cgraph_copy_node_for_versioning): Drop vtable_method.
-	* lto-cgraph.c (lto_output_node, input_overwrite_node): Drop vtable method.
+	* lto-cgraph.c (lto_output_node, input_overwrite_node): Drop vtable
+	method.
 	* gimple-fold.c (can_refer_decl_in_current_unit_p): Mention PR20991 in
 	gimple-fold.c
 	* varasm.c (mark_decl_referenced): Drop vtable_method handling code.

gcc/cfgexpand.c

@@ -2495,6 +2495,7 @@ expand_debug_expr (tree exp)
 	      || !TREE_STATIC (exp)
 	      || !DECL_NAME (exp)
 	      || DECL_HARD_REGISTER (exp)
+	      || DECL_IN_CONSTANT_POOL (exp)
 	      || mode == VOIDmode)
 	    return NULL;