Re: Frustrated with dmd codegen bug

[jmh530 via Digitalmars-d]

On Tuesday, 24 April 2018 at 18:53:02 UTC, H. S. Teoh wrote:
[snip]

That's definitely weird. Problem seems to go away with a static 
array. Seems somehow related to impl[0]. Re-writing that as 
*impl.ptr and breaking apart some of the logic might help narrow 
down the issue.


bool method(int v)
{
    int wordIdx = v >> 6;
    int bitIdx = v & 0b00111111;

    func();

    if (impl.length < wordIdx)
    {
        import std.stdio : writeln;
        auto temp1 = (1UL << bitIdx);
        writeln(1UL << bitIdx); //testing with v=200, prints 256
        writeln(*impl.ptr & 256); //prints 0
        auto temp2 = (*impl.ptr & temp1); //program killed
        //writeln(*impl.ptr & 256); //if uncommented, program not 
killed
        return temp2 != 0;
    }
    else
    {
        return false;
    }
}