[Bug tree-optimization/41879] [4.5 Regression] 172.mgrid regression, vectorizer prevents predictive commoning

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-10-30 16:57 -------
Testcase:

      SUBROUTINE PSINV(R,U,C)
      PARAMETER (N=64)
      REAL*8 U(N,N,N),R(N,N,N),C(0:3)
      INTEGER I3, I2, I1
C
      DO 600 I3=2,N-1
      DO 600 I2=2,N-1
      DO 600 I1=2,N-1
 600  U(I1,I2,I3)=U(I1,I2,I3)
     >      +C(0)*( R(I1,  I2,  I3  ) )
     >      +C(1)*( R(I1-1,I2,  I3  ) + R(I1+1,I2,  I3  )
     >           +  R(I1,  I2-1,I3  ) + R(I1,  I2+1,I3  )
     >           +  R(I1,  I2,  I3-1) + R(I1,  I2,  I3+1) )
     >      +C(2)*( R(I1-1,I2-1,I3  ) + R(I1+1,I2-1,I3  )
     >           +  R(I1-1,I2+1,I3  ) + R(I1+1,I2+1,I3  )
     >           +  R(I1,  I2-1,I3-1) + R(I1,  I2+1,I3-1)
     >           +  R(I1,  I2-1,I3+1) + R(I1,  I2+1,I3+1)
     >           +  R(I1-1,I2,  I3-1) + R(I1-1,I2,  I3+1)
     >           +  R(I1+1,I2,  I3-1) + R(I1+1,I2,  I3+1) )
     >      +C(3)*( R(I1-1,I2-1,I3-1) + R(I1+1,I2-1,I3-1)
     >           +  R(I1-1,I2+1,I3-1) + R(I1+1,I2+1,I3-1)
     >           +  R(I1-1,I2-1,I3+1) + R(I1+1,I2-1,I3+1)
     >           +  R(I1-1,I2+1,I3+1) + R(I1+1,I2+1,I3+1) )
C
      RETURN
      END


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41879