[Bug tree-optimization/33604] [4.3 Regression] Revision 119502 causes significantly slower results with 4.3 compared to 4.2

[bonzini at gnu dot org]

------- Comment #17 from bonzini at gnu dot org  2007-11-07 16:03 -------
Created an attachment (id=14497)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14497&action=view)
"minimal" testcase

This is as small as I could get it (130 lines).  Can be made smaller, but the
performance difference is much less sensitive.  I get 0.8s with 4.2, 1.4s with
4.3.

The problem is that the MatRef classes (called EiMatrixConstRef in the
original, I renamed stuff and detemplatized it to simplify dumps) are not
scalarized.


-- 

bonzini at gnu dot org changed:

           What    |Removed                     |Added
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  Attachment #14496|0                           |1
        is obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33604