[C PATCH] Fix another _Complex C ICE (PR c/54559)

[Jakub Jelinek]

Hi!

This ICE is because c_finish_return calls convert after c_fully_fold
is performed on the argument, and doesn't call it again, thus we need
in_late_binary_op.

Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux,
ok for trunk/4.7?

2012-09-13  Jakub Jelinek  <ja...@redhat.com>

        PR c/54559
        * c-typeck.c (c_finish_return): Do convert to BOOLEAN_TYPE or
        COMPLEX_TYPE with in_late_binary_op set temporarily to true.

        * gcc.c-torture/compile/pr54559.c: New test.

--- gcc/c/c-typeck.c.jj 2012-09-12 10:56:59.000000000 +0200
+++ gcc/c/c-typeck.c    2012-09-13 10:57:24.318837832 +0200
@@ -8682,12 +8682,18 @@ c_finish_return (location_t loc, tree re
                                       npc, NULL_TREE, NULL_TREE, 0);
       tree res = DECL_RESULT (current_function_decl);
       tree inner;
+      bool save;
 
       current_function_returns_value = 1;
       if (t == error_mark_node)
        return NULL_TREE;
 
+      save = in_late_binary_op;
+      if (TREE_CODE (TREE_TYPE (res)) == BOOLEAN_TYPE
+          || TREE_CODE (TREE_TYPE (res)) == COMPLEX_TYPE)
+        in_late_binary_op = true;
       inner = t = convert (TREE_TYPE (res), t);
+      in_late_binary_op = save;
 
       /* Strip any conversions, additions, and subtractions, and see if
         we are returning the address of a local variable.  Warn if so.  */
--- gcc/testsuite/gcc.c-torture/compile/pr54559.c.jj    2012-09-13 
11:23:32.049954011 +0200
+++ gcc/testsuite/gcc.c-torture/compile/pr54559.c       2012-09-13 
11:23:15.000000000 +0200
@@ -0,0 +1,9 @@
+/* PR c/54559 */
+
+typedef double _Complex T;
+
+T
+foo (double x, double y)
+{
+  return x + y * (T) (__extension__ 1.0iF);
+}

        Jakub