re PR tree-optimization/38104 (ICE segmentation fault (with -O3 when deref a…

re PR tree-optimization/38104 (ICE segmentation fault  (with -O3 when deref a NULL pointer in the code??))

	PR tree-optimization/38104
	* gimplify.c (gimple_regimplify_operands): Add referenced vars
	before calling mark_symbols_for_renaming, not after it.

	* g++.dg/tree-ssa/pr38104.C: New test.

From-SVN: r141857

gcc/ChangeLog

+2008-11-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/38104
+	* gimplify.c (gimple_regimplify_operands): Add referenced vars
+	before calling mark_symbols_for_renaming, not after it.
+
 2008-11-14  Kaz Kojima  <kkojima@gcc.gnu.org>
 
 	* config/sh/sh.h (OPTIMIZATION_OPTIONS): Revert last change.

gcc/gimplify.c

@@ -7566,6 +7566,10 @@ gimple_regimplify_operands (gimple stmt, gimple_stmt_iterator *gsi_p)
       break;
     }
 
+  if (gimple_referenced_vars (cfun))
+    for (t = gimplify_ctxp->temps; t ; t = TREE_CHAIN (t))
+      add_referenced_var (t);
+
   if (!gimple_seq_empty_p (pre))
     {
       if (gimple_in_ssa_p (cfun))
@@ -7580,10 +7584,6 @@ gimple_regimplify_operands (gimple stmt, gimple_stmt_iterator *gsi_p)
   if (post_stmt)
     gsi_insert_after (gsi_p, post_stmt, GSI_NEW_STMT);
 
-  if (gimple_referenced_vars (cfun))
-    for (t = gimplify_ctxp->temps; t ; t = TREE_CHAIN (t))
-      add_referenced_var (t);
-
   pop_gimplify_context (NULL);
 }
 

gcc/testsuite/ChangeLog

+2008-11-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/38104
+	* g++.dg/tree-ssa/pr38104.C: New test.
+
 2008-11-14  Kaz Kojima  <kkojima@gcc.gnu.org>
 
 	* gcc.target/sh/pr37514.c: Remove.

gcc/testsuite/g++.dg/tree-ssa/pr38104.C

+// PR tree-optimization/38104
+// { dg-do compile }
+// { dg-options "-O3" }
+
+struct S { int foo; };
+
+void f0 ();
+
+void
+f1 (struct S s)
+{
+  f0 ();
+}
+
+void
+f2 ()
+{
+  f1 (*(struct S *) (0));
+}