re PR c/47150 (ICE in gimplify_expr at gimplify.c)

	PR c/47150
	* c-convert.c (convert): When converting a complex expression
	other than COMPLEX_EXPR to a different complex type, ensure
	c_save_expr is called instead of save_expr, unless in_late_binary_op.
	* c-typeck.c (convert_for_assignment): Set in_late_binary_op also
	when converting COMPLEX_TYPE.

	* gcc.c-torture/compile/pr47150.c: New test.

From-SVN: r168537

gcc/ChangeLog

+2011-01-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/47150
+	* c-convert.c (convert): When converting a complex expression
+	other than COMPLEX_EXPR to a different complex type, ensure
+	c_save_expr is called instead of save_expr, unless in_late_binary_op.
+	* c-typeck.c (convert_for_assignment): Set in_late_binary_op also
+	when converting COMPLEX_TYPE.
+
 2011-01-06  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/47139

gcc/c-convert.c

@@ -130,6 +130,32 @@ convert (tree type, tree expr)
       goto maybe_fold;
 
     case COMPLEX_TYPE:
+      /* If converting from COMPLEX_TYPE to a different COMPLEX_TYPE
+	 and e is not COMPLEX_EXPR, convert_to_complex uses save_expr,
+	 but for the C FE c_save_expr needs to be called instead.  */
+      if (TREE_CODE (TREE_TYPE (e)) == COMPLEX_TYPE)
+	{
+	  tree subtype = TREE_TYPE (type);
+	  tree elt_type = TREE_TYPE (TREE_TYPE (e));
+
+	  if (TYPE_MAIN_VARIANT (elt_type) != TYPE_MAIN_VARIANT (subtype)
+	      && TREE_CODE (e) != COMPLEX_EXPR)
+	    {
+	      if (in_late_binary_op)
+		e = save_expr (e);
+	      else
+		e = c_save_expr (e);
+	      ret
+		= fold_build2 (COMPLEX_EXPR, type,
+			       convert (subtype,
+					fold_build1 (REALPART_EXPR,
+						     elt_type, e)),
+			       convert (subtype,
+					fold_build1 (IMAGPART_EXPR,
+						     elt_type, e)));
+	      goto maybe_fold;
+	    }
+	}
       ret = convert_to_complex (type, e);
       goto maybe_fold;
 

gcc/c-typeck.c

@@ -5274,10 +5274,10 @@ convert_for_assignment (location_t location, tree type, tree rhs,
     {
       tree ret;
       bool save = in_late_binary_op;
-      if (codel == BOOLEAN_TYPE)
+      if (codel == BOOLEAN_TYPE || codel == COMPLEX_TYPE)
 	in_late_binary_op = true;
       ret = convert_and_check (type, orig_rhs);
-      if (codel == BOOLEAN_TYPE)
+      if (codel == BOOLEAN_TYPE || codel == COMPLEX_TYPE)
 	in_late_binary_op = save;
       return ret;
     }

gcc/testsuite/ChangeLog

+2011-01-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/47150
+	* gcc.c-torture/compile/pr47150.c: New test.
+
 2011-01-06  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/47139

gcc/testsuite/gcc.c-torture/compile/pr47150.c

+/* PR c/47150 */
+
+float _Complex foo (float, float);
+
+void
+bar ()
+{
+  float w = 2;
+  float _Complex b;
+  b = 0.5 * (foo (0, w) + foo (1, w) / w);
+}