[partial backport from gcc-4.8/trunk r189672 <mikpe@it.uu.se>]

From: Richard Henderson <rth at redhat dot com>
Subject: [PATCH 1/3] Fix 0 != CODE_FOR_nothing thinko
Date: Thu, 19 Jul 2012 11:52:56 -0700
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>

I discovered the vectorizable_operation while trying to figure out why
ia64 wasn't generating the mul_highpart pattern as I expected: we always
force CODE_FOR_nothing to 0.  Oops.

The change to expr.c was just to satisfy the grep I did to make sure
there were not other occurrences of a similar problem.


r~

gcc/

2012-07-19  Richard Henderson  <rth@redhat.com>

	* expr.c (store_constructor): Initialize icode with CODE_FOR_nothing.

--- gcc-4.6.3/gcc/expr.c.~1~	2012-02-09 18:28:22.000000000 +0100
+++ gcc-4.6.3/gcc/expr.c	2012-08-11 15:44:49.000000000 +0200
@@ -5761,7 +5761,7 @@ store_constructor (tree exp, rtx target,
 	constructor_elt *ce;
 	int i;
 	int need_to_clear;
-	int icode = 0;
+	int icode = CODE_FOR_nothing;
 	tree elttype = TREE_TYPE (type);
 	int elt_size = tree_low_cst (TYPE_SIZE (elttype), 1);
 	enum machine_mode eltmode = TYPE_MODE (elttype);