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Date: Thu, 03 Jun 2004 04:27:00 -0000
From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20040603042727.15792.pinskia@gcc.gnu.org>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug rtl-optimization/15792] New: missed subreg optimization
X-Bugzilla-Reason: CC
X-SW-Source: 2004-06/txt/msg00312.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

int test(unsigned long long x) {
int g = (int)x|((int)(x>>32));
  if (g) gh();
}
int test1(unsigned long long x) {
  if (x) gh();
}

These two functions should produce the same asm but test produces better asm.
I noticed this when looking PR 11873.

-- 
           Summary: missed subreg optimization
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P2
         Component: rtl-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
GCC target triplet: i686-pc-linux-gnu
OtherBugsDependingO 11873
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15792