Hi,
I try to make use of the new Array Notation to simplify/vectorize my code. However, it seems that it works as expected only if I use -O0.
Let me show a very simple C code and its output that illustrates the problem. I create an array with some values, copy it to a new array and finally I dump both arrays to screen:
[csharp]#include
#define N 4
int main(void){
int i,j;
int c0,c1;
c0[:][:] = 0;
c0[1:2][1:2] = 1;
c1[:][:] = c0[:][:];
for(i=0;i);
}
printf("\n");
}
printf("\n");
for(i=0;i);
}
printf("\n");
}
}[/csharp]
If I compile the above code with "icc -O0 test.c" the output is
[bash] 0 0 0 0
0 1 1 0
0 1 1 0
0 0 0 0
0 0 0 0
0 1 1 0
0 1 1 0
0 0 0 0
[/bash]
as I expect, while if I compile it with"icc -O3 test.c" (or -O1 or -O2) the output is different:
[bash] 0 0 0 0
0 1 1 0
0 1 1 0
0 0 0 0
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
[/bash]
I tried it with float arrays instead of int, with different sizes, etc. Similar results.
What am I doing wrong? Is there an extra compile option or an extra line I have to insert into my code that I'm nor aware of?
Thanks for your help.
