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* [Bug target/19201] New: [m68k] Inefficient code for array accesses  (from old PROBLEMS)
@ 2004-12-30 12:15 steven at gcc dot gnu dot org
  2004-12-31 13:32 ` [Bug target/19201] " schwab at suse dot de
  2004-12-31 14:58 ` pinskia at gcc dot gnu dot org
  0 siblings, 2 replies; 16+ messages in thread
From: steven at gcc dot gnu dot org @ 2004-12-30 12:15 UTC (permalink / raw)
  To: gcc-bugs

Item 10 from the old PROBLEMS file (no test case available):

----------------------------------------
        movl a3@,a0
        movl a3@(16),a1
        clrb a0@(a1:l)

is generated and may be worse than

        movl a3@,a0
        addl a3@(16),a0
        clrb a0@

If ordering of operands is improved, many more such cases will be
generated from typical array accesses.
----------------------------------------

-- 
           Summary: [m68k] Inefficient code for array accesses  (from old
                    PROBLEMS)
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: steven at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19201


^ permalink raw reply	[flat|nested] 16+ messages in thread
[parent not found: <bug-19201-280@http.gcc.gnu.org/bugzilla/>]
[parent not found: <bug-19201-4@http.gcc.gnu.org/bugzilla/>]
end of thread, other threads:[~2011-02-28 12:05 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-12-30 12:15 [Bug target/19201] New: [m68k] Inefficient code for array accesses (from old PROBLEMS) steven at gcc dot gnu dot org
2004-12-31 13:32 ` [Bug target/19201] " schwab at suse dot de
2004-12-31 14:58 ` pinskia at gcc dot gnu dot org
     [not found] <bug-19201-280@http.gcc.gnu.org/bugzilla/>
2005-11-19 21:52 ` kazu at gcc dot gnu dot org
2005-11-20  0:22 ` kazu at gcc dot gnu dot org
2005-11-21 23:07 ` schwab at suse dot de
2005-11-22 17:43 ` kazu at gcc dot gnu dot org
2007-12-17  8:12 ` steven at gcc dot gnu dot org
2008-09-03  2:06 ` pinskia at gcc dot gnu dot org
2008-09-21 13:22 ` steven at gcc dot gnu dot org
2010-02-12 22:01 ` steven at gcc dot gnu dot org
     [not found] <bug-19201-4@http.gcc.gnu.org/bugzilla/>
2011-02-25 23:13 ` steven at gcc dot gnu.org
2011-02-25 23:58 ` schwab@linux-m68k.org
2011-02-26  3:44 ` steven at gcc dot gnu.org
2011-02-26 12:33 ` mikpe at it dot uu.se
2011-02-28 12:37 ` mikpe at it dot uu.se

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