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 phobos;

import
std.array,
std.base64,
std.ctype,
std.format,
std.intrinsic,
std.math,
std.moduleinit,
std.outofmemory,
std.stdarg,
std.stdint,
std.stdio,
std.string,
std.thread,
std.traits,
std.uni,
std.utf,

std.c.fenv,
std.c.locale,
std.c.math,
std.c.process,
std.c.stdarg,
std.c.stddef,
std.c.stdio,
std.c.stdlib,
std.c.string,
std.c.time,
std.file,
std.date,
std.socket,
std.zlib,
std.cstream;

version(linux) {
    import
    std.c.linux.linux,
    std.c.linux.linuxextern,
    std.c.linux.pthread,
    std.c.linux.socket;
}