| ! { dg-options "-O3 -ffast-math -floop-nest-optimize -floop-block -fdump-tree-graphite-all" } |
| |
| INTEGER, PARAMETER :: N=1024 |
| REAL*8 :: A(N,N), B(N,N), C(N,N) |
| REAL*8 :: t1,t2 |
| A=0.1D0 |
| B=0.1D0 |
| C=0.0D0 |
| CALL cpu_time(t1) |
| CALL mult(A,B,C,N) |
| CALL cpu_time(t2) |
| write(6,*) t2-t1,C(1,1) |
| END program |
| |
| SUBROUTINE mult(A,B,C,N) |
| REAL*8 :: A(N,N), B(N,N), C(N,N) |
| INTEGER :: I,J,K,N |
| DO J=1,N |
| DO I=1,N |
| DO K=1,N |
| C(I,J)=C(I,J)+A(I,K)*B(K,J) |
| ENDDO |
| ENDDO |
| ENDDO |
| END SUBROUTINE mult |
| |
| ! { dg-final { scan-tree-dump "tiled by" "graphite" } } |
