From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-364239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 24939 invoked by alias); 1 Aug 2011 09:06:32 -0000
Received: (qmail 24753 invoked by uid 22791); 1 Aug 2011 09:06:31 -0000
X-SWARE-Spam-Status: No, hits=-2.8 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00,TW_TM
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 01 Aug 2011 09:06:17 +0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/49911] SRA + DOM + VRP + -fstrict-enums incorrectly remove predicate
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-49911-4-I2TuoDrzYp@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-49911-4@http.gcc.gnu.org/bugzilla/>
References: <bug-49911-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Date: Mon, 01 Aug 2011 09:06:00 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2011-08/txt/msg00013.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49911

--- Comment #9 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-01 09:05:38 UTC ---
verifier patch that would catch at least computation results (but not loads):

Index: gcc/tree-cfg.c
===================================================================
--- gcc/tree-cfg.c      (revision 176998)
+++ gcc/tree-cfg.c      (working copy)
@@ -3241,6 +3314,16 @@ verify_gimple_assign_unary (gimple stmt)
       return true;
     }

+  if (INTEGRAL_TYPE_P (lhs_type)
+      && (!tree_int_cst_equal (TYPE_MIN_VALUE (lhs_type),
+                              lower_bound_in_type (lhs_type, lhs_type))
+         || !tree_int_cst_equal (TYPE_MAX_VALUE (lhs_type),
+                                 upper_bound_in_type (lhs_type, lhs_type))))
+    {
+      error ("register with non-canonical bounds");
+      return true;
+    }
+
   /* First handle conversions.  */
   switch (rhs_code)
     {
@@ -3397,6 +3480,16 @@ verify_gimple_assign_binary (gimple stmt
       return true;
     }

+  if (INTEGRAL_TYPE_P (lhs_type)
+      && (!tree_int_cst_equal (TYPE_MIN_VALUE (lhs_type),
+                              lower_bound_in_type (lhs_type, lhs_type))
+         || !tree_int_cst_equal (TYPE_MAX_VALUE (lhs_type),
+                                 upper_bound_in_type (lhs_type, lhs_type))))
+    {
+      error ("register with non-canonical bounds");
+      return true;
+    }
+
   /* First handle operations that involve different types.  */
   switch (rhs_code)
     {


shows that the IL after SRA is broken:

t.ii: In function 'void jsop_setelem(bool, int)':
t.ii:32:6: error: register with non-canonical bounds
D.1816_11 = (RegisterID) z_3(D);

t.ii:32:6: internal compiler error: verify_gimple failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.