[Issue 6528] Private module functions optimizations

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6528



--- Comment #1 from bearophile_hugs at eml.cc 2011-08-20 01:14:33 PDT ---
Another optimization example:

private void foo(int[] a) {}
void main() {
    int[100] array;
    foo(array);
}


Converted to:

private void foo(ref int[100] a) {}
void main() {
    int[100] array;
    foo(array);
}

------------------

The optimization is possible if foo has more than one call from the module, if
the body of foo is short:

private void foo(int[] a) {
    // this is a short function
}
void main() {
    int[100] array1;
    foo(array1);
    int[200] array2;
    foo(array2);
}


Converted to:

private void foo(size_t N)(ref int[N] a) {
    // this is a short function
}
void main() {
    int[100] array1;
    foo(array1);
    int[200] array2;
    foo(array2);
}

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