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Date: Wed, 21 Sep 2005 16:06:00 -0000
From: "falk at debian dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20050921160417.24001.falk@debian.org>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug tree-optimization/24001] New: Simple redundancy not eliminated
X-Bugzilla-Reason: CC
X-SW-Source: 2005-09/txt/msg02657.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

For this code:

int f(int *ptr, int t) {
    if (t)
        return  *ptr;
    else
        return  *ptr;
}

the jump is not eliminated:

f:      beq $17,$L2
        ldl $0,0($16)
        ret
$L2:    ldl $0,0($16)
        ret

This used to work with 2.95 (not sure whether that still counts as 
regression...), but not with 3.3, 3.4, 4.0, or 4.1.0 20050915.

-- 
           Summary: Simple redundancy not eliminated
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: falk at debian dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: alpha-linux-gnu
  GCC host triplet: alpha-linux-gnu
GCC target triplet: alpha-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24001