decl.c (SS_MARK_NAME): New define.

* gcc-interface/decl.c (SS_MARK_NAME): New define.
	(gnat_to_gnu_entity) <E_Function>: Prepend leaf attribute on entities
	whose name is SS_MARK_NAME.

From-SVN: r185781

gcc/ada/ChangeLog

@@ -1,3 +1,9 @@
+2012-03-25  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc-interface/decl.c (SS_MARK_NAME): New define.
+	(gnat_to_gnu_entity) <E_Function>: Prepend leaf attribute on entities
+	whose name is SS_MARK_NAME.
+
 2012-03-22  Release Manager
 
 	* GCC 4.7.0 released.

gcc/ada/gcc-interface/decl.c

@@ -81,6 +81,9 @@
 #define FOREIGN_FORCE_REALIGN_STACK 0
 #endif
 
+/* The (internal) name of the System.Secondary_Stack.SS_Mark function.  */
+#define SS_MARK_NAME "system__secondary_stack__ss_mark"
+
 struct incomplete
 {
   struct incomplete *next;
@@ -4413,6 +4416,21 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	     get_identifier ("force_align_arg_pointer"), NULL_TREE,
 	     gnat_entity);
 
+	/* ??? Declare System.Secondary_Stack.SS_Mark as leaf, in order to
+	   avoid creating abnormal edges in SJLJ mode, which can break the
+	   dominance relationship if there is a dynamic stack allocation.
+	   We cannot do this in System.Secondary_Stack directly since it's
+	   a compiler unit and this would introduce bootstrap path issues.  */
+	if (IDENTIFIER_LENGTH (gnu_entity_name) == strlen (SS_MARK_NAME)
+	    && IDENTIFIER_POINTER (gnu_entity_name)[0] == SS_MARK_NAME[0]
+	    && IDENTIFIER_POINTER (gnu_entity_name)[1] == SS_MARK_NAME[1]
+	    && IDENTIFIER_POINTER (gnu_entity_name)[2] == SS_MARK_NAME[2]
+	    && gnu_entity_name == get_identifier (SS_MARK_NAME))
+	  prepend_one_attribute_to
+	    (&attr_list, ATTR_MACHINE_ATTRIBUTE,
+	     get_identifier ("leaf"), NULL_TREE,
+	     gnat_entity);
+
 	/* The lists have been built in reverse.  */
 	gnu_param_list = nreverse (gnu_param_list);
 	if (has_stub)

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2012-03-25  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/concat2.ad[sb]: New test.
+
 2012-03-24  Steven Bosscher  <steven@gcc.gnu.org>
 
 	PR middle-end/52640

gcc/testsuite/gnat.dg/concat2.adb

@@ -0,0 +1,18 @@
+with Text_IO; use Text_IO;
+
+package body Concat2 is
+
+   function Get_Param return String is
+   begin
+      return "";
+   end;
+
+   procedure Browse is
+      Mode         : constant String := Get_Param;
+      Mode_Param   : constant String := "MODE=" & Mode;
+   begin
+      Put_Line (Mode_Param);
+   end;
+
+end Concat2;
+

gcc/testsuite/gnat.dg/concat2.ads

@@ -0,0 +1,8 @@
+-- { dg-do compile }
+-- { dg-options "-O" }
+
+package Concat2 is
+
+   procedure Browse;
+
+end Concat2;