re PR c++/43093 (internal compiler error: Segmentation fault when compiling Firefox)

	PR c++/43093
	* cp-gimplify.c (cp_gimplify_expr) [INIT_EXPR]: Return if we don't
	have an INIT_EXPR anymore.

From-SVN: r156840

gcc/cp/ChangeLog

 2010-02-17  Jason Merrill  <jason@redhat.com>
 
+	PR c++/43093
+	* cp-gimplify.c (cp_gimplify_expr) [INIT_EXPR]: Return if we don't
+	have an INIT_EXPR anymore.
+
 	PR c++/43079
 	* pt.c (convert_nontype_argument): Change assert to test.
 

gcc/cp/cp-gimplify.c

@@ -552,7 +552,9 @@ cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
 	 25979.  */
     case INIT_EXPR:
       cp_gimplify_init_expr (expr_p, pre_p, post_p);
-      /* Fall through.  */
+      if (TREE_CODE (*expr_p) != INIT_EXPR)
+	return GS_OK;
+      /* Otherwise fall through.  */
     case MODIFY_EXPR:
       {
 	/* If the back end isn't clever enough to know that the lhs and rhs

gcc/testsuite/ChangeLog

 2010-02-17  Jason Merrill  <jason@redhat.com>
 
+	PR c++/43093
+	* g++.dg/ext/attrib37.C: New.
+
 	PR c++/43079
 	* g++.dg/template/ptrmem20.C: New.
 

gcc/testsuite/g++.dg/ext/attrib37.C

+// PR c++/43093
+// { dg-do compile { target i?86-*-* } }
+
+struct S {
+  int x;
+  S(const S &s) {}
+};
+
+S __attribute__((__stdcall__)) getS();
+
+void test()
+{
+  S s = getS();
+}