re PR c++/93046 (ICE in cp_gimplify_init_expr)

	PR c++/93046
	* cp-gimplify.c (cp_gimplify_init_expr): Don't look through
	TARGET_EXPR if it has been gimplified already.

	* g++.dg/ext/cond4.C: New test.

From-SVN: r279884

gcc/cp/ChangeLog

+2010-01-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/93046
+	* cp-gimplify.c (cp_gimplify_init_expr): Don't look through
+	TARGET_EXPR if it has been gimplified already.
+
 2020-01-03  Jason Merrill  <jason@redhat.com>
 
 	PR c++/93033 - incorrect tree node sharing with array init.

gcc/cp/cp-gimplify.c

@@ -523,7 +523,7 @@ cp_gimplify_init_expr (tree *expr_p, gimple_seq *pre_p)
      think that such code never uses the TARGET_EXPR as an initializer.  If
      I'm wrong, we'll abort because the temp won't have any RTL.  In that
      case, I guess we'll need to replace references somehow.  */
-  if (TREE_CODE (from) == TARGET_EXPR)
+  if (TREE_CODE (from) == TARGET_EXPR && TARGET_EXPR_INITIAL (from))
     from = TARGET_EXPR_INITIAL (from);
 
   /* If we might need to clean up a partially constructed object, break down

gcc/testsuite/ChangeLog

+2010-01-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/93046
+	* g++.dg/ext/cond4.C: New test.
+
 2020-01-04  Tobias Burnus  <tobias@codesourcery.com>
 
 	PR fortran/91640

gcc/testsuite/g++.dg/ext/cond4.C

+// PR c++/93046
+// { dg-do compile }
+// { dg-options "" }
+
+struct S {
+  S (int);
+  operator bool ();
+};
+
+S
+foo ()
+{
+  return S (1) ? : S (2);
+}