re PR c++/7050 (g++ segfaults on: (i ? get_string() : throw))

        PR c++/7050
        * expr.c (store_expr): Don't attempt to store void-typed trees,
        just evaluate them for side effects.
        * cp/expr.c (cxx_expand_expr): Return const0_rtx for throw
        expressions.

From-SVN: r64268

1 files changed, 10 insertions, 0 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 46b264e..e540fb2 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -4354,6 +4354,16 @@ store_expr (exp, target, want_value)
   int dont_return_target = 0;
   int dont_store_target = 0;
 
+  if (VOID_TYPE_P (TREE_TYPE (exp)))
+    {
+      /* C++ can generate ?: expressions with a throw expression in one
+	 branch and an rvalue in the other. Here, we resolve attempts to
+	 store the throw expression's nonexistant result. */
+      if (want_value)
+	abort ();
+      expand_expr (exp, const0_rtx, VOIDmode, 0);
+      return NULL_RTX;
+    }
   if (TREE_CODE (exp) == COMPOUND_EXPR)
     {
       /* Perform first part of compound expression, then assign from second