From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 32226 invoked by alias); 20 May 2008 18:44:02 -0000 Received: (qmail 32125 invoked by alias); 20 May 2008 18:43:19 -0000 Date: Tue, 20 May 2008 18:44:00 -0000 Message-ID: <20080520184319.32124.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug middle-end/36194] [4.2 Regression] Truncation optimization in combine can remove necessary truncations In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "nemet at gcc dot gnu dot org" 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: 2008-05/txt/msg01573.txt.bz2 ------- Comment #6 from nemet at gcc dot gnu dot org 2008-05-20 18:43 ------- Subject: Bug 36194 Author: nemet Date: Tue May 20 18:42:09 2008 New Revision: 135670 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=135670 Log: PR middle-end/36194 * combine.c (check_conversion): Rename to check_promoted_subreg. Don't call record_truncated_value from here. (record_truncated_value): Turn it into a for_each_rtx callback. (record_truncated_values): New function. (combine_instructions): Call note_uses with record_truncated_values. Change name of check_conversion to check_promoted_subreg. testsuite/ * gcc.dg/pr36194.c: New test. Added: branches/gcc-4_2-branch/gcc/testsuite/gcc.dg/pr36194.c Modified: branches/gcc-4_2-branch/gcc/ChangeLog branches/gcc-4_2-branch/gcc/combine.c branches/gcc-4_2-branch/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36194