From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15628 invoked by alias); 6 Jul 2010 16:44:49 -0000 Received: (qmail 15565 invoked by uid 48); 6 Jul 2010 16:44:30 -0000 Date: Tue, 06 Jul 2010 16:44:00 -0000 Message-ID: <20100706164430.15564.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug middle-end/44790] [4.6 Regression] Bootstrap fails after MEM-REF merge In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "sje at cup dot hp dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2010-07/txt/msg00610.txt.bz2 ------- Comment #3 from sje at cup dot hp dot com 2010-07-06 16:44 ------- The neccessary UNSPEC seems to be there if you trace the instructions back far enough. I tried it on my test case and it worked. I am now testing the patch on ToT to see if I can bootstrap. I also have to turn off partial inlining to get bootstrap to work on ia64-hp-hpux11.23. I tweaked the patch for ToT there are a bunch of changes to expr.c including setting base so the patch I am currently testing with r161861 looks like this: Index: expr.c =================================================================== --- expr.c (revision 161861) +++ expr.c (working copy) @@ -8777,13 +8777,11 @@ expand_expr_real_1 (tree exp, rtx target base = build2 (BIT_AND_EXPR, TREE_TYPE (base), gimple_assign_rhs1 (def_stmt), gimple_assign_rhs2 (def_stmt)); - op0 = expand_expr (base, NULL_RTX, address_mode, EXPAND_NORMAL); if (!integer_zerop (TREE_OPERAND (exp, 1))) - { - rtx off; - off = immed_double_int_const (mem_ref_offset (exp), address_mode); - op0 = simplify_gen_binary (PLUS, address_mode, op0, off); - } + base = build2 (POINTER_PLUS_EXPR, TREE_TYPE (base), + base, double_int_to_tree (sizetype, + mem_ref_offset (exp))); + op0 = expand_expr (base, NULL_RTX, address_mode, EXPAND_SUM); op0 = memory_address_addr_space (mode, op0, as); temp = gen_rtx_MEM (mode, op0); set_mem_attributes (temp, exp, 0); -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44790