Allow specific optimization passes to be requested from the command line. Now you can run "`ldc test.d -c -mem2reg -simplifycfg`" if you feel the urge. The -O<N> options are still supported, and are inserted in the passes list in the position where they appear on the command line. (so -simplifycfg -O1 -instcombine does the "right thing") One small change: -inline is renamed to -enable-inlining due to a naming conflict with the option to add the -inline pass. -inline now inserts the inlining pass in the position specified, not in the middle of -O<N>. (ldmd has been updated to translate -inline to -enable-inlining)

module tangotests.mem4;

import tango.stdc.stdio;

class C {
    int* ptr;
    this() {
        printf("this()\n");
        ptr = new int;
    }
    ~this() {
        printf("~this()\n");
        delete ptr;
        assert(ptr is null);
    }
    final void check()
    {
        printf("check()\n");
        assert(ptr !is null);
    }
}

void main()
{
    C c = new C();
    c.check();
    delete c;
    assert(c is null);
}