[Bug tree-optimization/28868] [4.2/4.3/4.4 Regression] Not eliminating the PHIs which have the same arguments

[rguenth at gcc dot gnu dot org]

--- Comment #16 from rguenth at gcc dot gnu dot org  2009-03-25 13:18 
---
Re-confirmed.  The fix is to eliminate duplicate PHI nodes in eliminate() by
copy-propagating PHI value-numbers.


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rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

   Last reconfirmed|2009-02-04 10:14:52 |2009-03-25 13:18:37
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28868

[Bug tree-optimization/28868] [4.2/4.3/4.4 Regression] Not eliminating the PHIs which have the same arguments

[rguenth at gcc dot gnu dot org]

--- Comment #15 from rguenth at gcc dot gnu dot org  2009-02-04 10:14 
---
I think this is bug is a valid request for FRE to eliminate redundant PHI
nodes:

bb 4:
  # c_1 = PHI a_4(D)(2), b_7(D)(3)
  # d_2 = PHI a_4(D)(2), b_7(D)(3)
  D.1599_10 = c_1 + d_2;

There are no two same PHI nodes in PR23821.

I am going to fix this one.


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rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
   |dot org |org
 Status|NEW |ASSIGNED
   Last reconfirmed|2007-08-06 15:30:40 |2009-02-04 10:14:52
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28868

[Bug tree-optimization/28868] [4.2/4.3/4.4 Regression] Not eliminating the PHIs which have the same arguments

[bonzini at gnu dot org]

--- Comment #14 from bonzini at gnu dot org  2009-02-04 07:40 ---
We should make up our mind and close either this one or 23821... they are
requesting exactly opposite things.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28868

[Bug tree-optimization/28868] [4.2/4.3/4.4 Regression] Not eliminating the PHIs which have the same arguments

[jsm28 at gcc dot gnu dot org]

--- Comment #13 from jsm28 at gcc dot gnu dot org  2008-07-04 21:28 ---
Closing 4.1 branch.


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jsm28 at gcc dot gnu dot org changed:

   What|Removed |Added

Summary|[4.1/4.2/4.3/4.4 Regression]|[4.2/4.3/4.4 Regression] Not
   |Not eliminating the PHIs|eliminating the PHIs which
   |which have the same |have the same arguments
   |arguments   |
   Target Milestone|4.1.3   |4.2.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28868