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From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug optimization/14541] [tree-ssa] built-in math functions are not fully optimized at tree level
Date: Fri, 12 Mar 2004 15:30:00 -0000	[thread overview]
Message-ID: <20040312153008.9782.qmail@sources.redhat.com> (raw)
In-Reply-To: <20040312001701.14541.kazu@cs.umass.edu>


------- Additional Comments From amacleod at redhat dot com  2004-03-12 15:30 -------
Which expanders?  

Am I looking at something wrong?  I see optimized tree code:

test (d1)
{
  double T.1;
  double T.0;

<bb 0>:
  if (log (exp (d1<D1066>)) != d1<D1066>) goto <L0>; else goto <L1>;

<L0>:;
  link_failure () [tail call];

<L1>:;
  return;

}


And if I put a breakpoint in  expand_builtin_mathfn() I see:

Breakpoint 4, expand_builtin_mathfn (exp=0x400231e0, target=0x0, subtarget=0x0)
    at /src/tree-ssa/2004-03-09/gcc/gcc/builtins.c:1704
1704	  tree fndecl = get_callee_fndecl (exp);
(gdb) p print_generic_expr (stderr, exp, 64)
log (exp (d1))
$1 = void

Its true that we dont get rid of the link_failure(), but I dont see a temp in
there...

Andrew

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14541


  parent reply	other threads:[~2004-03-12 15:30 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-03-12  0:17 [Bug optimization/14541] New: [tree-ssa] gcc.dg/torture/builtin-explog-1.c fails kazu at cs dot umass dot edu
2004-03-12  0:18 ` [Bug optimization/14541] " kazu at cs dot umass dot edu
2004-03-12  0:26 ` pinskia at gcc dot gnu dot org
2004-03-12  2:40 ` [Bug optimization/14541] [tree-ssa] built-in math functions are not fully optimized at tree level kazu at cs dot umass dot edu
2004-03-12 15:30 ` amacleod at redhat dot com [this message]
2004-03-25  0:09 ` bje at gcc dot gnu dot org
2004-05-03 12:37 ` pinskia at gcc dot gnu dot org
2004-05-04  7:56 ` kazu at cs dot umass dot edu
2004-05-04 11:32 ` pinskia at gcc dot gnu dot org
2004-05-04 15:52 ` kazu at cs dot umass dot edu
2004-05-04 15:57 ` pinskia at gcc dot gnu dot org
2004-05-24 21:48 ` [Bug tree-optimization/14541] " pinskia at gcc dot gnu dot org
2004-06-01  1:47 ` pinskia at gcc dot gnu dot org
2004-06-21  5:15 ` pinskia at gcc dot gnu dot org

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