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)

--- a/bin/ldmd	Sun Mar 29 11:44:32 2009 +0200
+++ b/bin/ldmd	Sun Mar 29 15:46:55 2009 +0200
@@ -17,9 +17,17 @@
 IDX=0
 for arg; do
     case "$arg" in
+    -C*)
+        # turn -Cfoo into -foo.
+        # Useful for passing -inline to ldc, for instance.
+        arg="-${arg:2}"
+        ;;
     -debug|-debug=*|-version=*)
         arg="-d$arg"
         ;;
+    -inline)
+        arg="-enable-inlining"
+        ;;
     -fPIC)
         arg="-relocation-model=pic"
         ;;