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Re: [ccp4bb]: REFMAC5 under CCP4 4.1



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>

Here is very small program wich behaves differently with -O2 (result 6 1) and
-O0 (result 6 6). This type of code may be seen
everywhere (red hat version 7.0, gcc 2.96 g77 0.5.24)

Garib

      REAL AMAT(20),TEST
      INTEGER N
      TEST = 1
      TEST = TEST*2
      TEST = TEST*3
      N = 20
      DO   I=1,N
         AMAT(I) = I
      ENDDO

      DO   I=1,N
        IF(TEST.EQ.AMAT(I)) GOTO 10
      ENDDO
      TEST = TEST*4

 10   WRITE(*,*)TEST,I
      STOP
      END




--
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Garib N. Murshudov, Chemistry Department, University of York, U.K.
Tel: Home +44 (1904) 42 62 87, work:  +44 (1904) 43 25 65
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