In this case, I think that Outer loop could be vectorized as there is
no dependency in the loop,the access pattern is simple enough and
there is unit stride in both the loops. Current version 4.4.* is not
doing outer loop vectorization.
On Tue, May 26, 2009 at 5:57 PM, Ira Rosen i...@il.ibm.com
for a loop like
1 for(i=0;iN;i++)
2 for(j=0;jN;j++)
3 a[i][j] = a[i][j]+b[i][j];
GCC 4.3.* is unable to get the information for the inner loop that
array reference 'a' is alias of each other and generates code for
runtime aliasing check during vectorization. Is
