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)

/*
 * Placed in public domain.
 * Written by Hauke Duden and Walter Bright
 */

/* This is for use with variable argument lists with extern(D) linkage. */

/* Modified for LDC (LLVM D Compiler) by Tomas Lindquist Olsen, 2007 */

module std.stdarg;

alias void* va_list;

T va_arg(T)(ref va_list vp)
{
    size_t size = T.sizeof > size_t.sizeof ? size_t.sizeof : T.sizeof;
    va_list vptmp = cast(va_list)((cast(size_t)vp + size - 1) &  ~(size - 1));
    vp = vptmp + T.sizeof;
    return *cast(T*)vptmp;
}