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Date: Wed, 06 Jul 2005 15:18:00 -0000
From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20050706151821.22325.pinskia@gcc.gnu.org>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug tree-optimization/22325] New: missed optimization in loop
X-Bugzilla-Reason: CC
X-SW-Source: 2005-07/txt/msg00562.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

The following two functions should be the same:
int foo(int a) {
int i;
for (i=0; i<200; i++) {
a = a + 5;
}
return a;
}
int foo(int a) {
int i;
for (i=0; i<200; i++) ;
return a+5*200;
}

The RTL optimizers catch this on ppc but not on x86.

-- 
           Summary: missed optimization in loop
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, TREE
          Severity: enhancement
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22325