re PR c++/49264 (Internal compiler error: segmentation fault)

	PR c++/49264
	* gimple-fold.c (fold_stmt_1): Don't try to fold *& on the lhs
	if stmt folded into nothing.
	* tree-inline.c (fold_marked_statements): If a builtin at the
	end of a bb folded into nothing, just update cgraph edges
	and move to next bb.
	* cgraph.c (cgraph_update_edges_for_call_stmt_node): Allow new_stmt
	to be NULL.  Don't compute count and frequency if new_call is NULL.

	* g++.dg/opt/pr49264.C: New test.

From-SVN: r174712

gcc/ChangeLog

 2011-06-06  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/49294
+	* dwarf2out.c (mem_loc_descriptor) <do_shift>: Give up for
+	non-MODE_INT modes.
+
 	PR c++/49264
 	* gimple-fold.c (fold_stmt_1): Don't try to fold *& on the lhs
 	if stmt folded into nothing.

gcc/dwarf2out.c

@@ -14904,6 +14904,8 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
       goto do_shift;
 
     do_shift:
+      if (GET_MODE_CLASS (mode) != MODE_INT)
+	break;
       op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
 				VAR_INIT_STATUS_INITIALIZED);
       {

gcc/testsuite/ChangeLog

 2011-06-06  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/49294
+	* gcc.dg/debug/pr49294.c: New test.
+
 	PR c++/49264
 	* g++.dg/opt/pr49264.C: New test.
 

gcc/testsuite/gcc.dg/debug/pr49294.c

+/* PR debug/49294 */
+/* { dg-do compile } */
+
+typedef __attribute__ ((vector_size ((8) * sizeof (short)))) short V;
+
+int k;
+V v;
+
+void
+foo (void)
+{
+  V w = { k, k, k, k, k, k, k, k };
+  V x = v >> w;
+}