[Bug tree-optimization/37194] [4.3 Regression] Autovectorization of small constant iteration loop degrades performance

irar at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Sun Jan 11 07:55:00 GMT 2009



------- Comment #13 from irar at gcc dot gnu dot org  2009-01-11 07:54 -------
Subject: Bug 37194

Author: irar
Date: Sun Jan 11 07:54:40 2009
New Revision: 143263

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143263
Log:
        Backport from mainline:
        2009-01-08  Ira Rosen  <irar@il.ibm.com>

        PR tree-optimization/37194
        * tree-vect-transform.c (vect_estimate_min_profitable_iters):
        Don't add the cost of cost model guard in prologue to scalar
        outside cost in case of known number of iterations.


Added:
   
branches/gcc-4_3-branch/gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_3-branch/gcc/tree-vect-transform.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37194



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