[svn r112] Fixed 'case 1,2,3:' style case statements. Fixed a bunch of bugs with return/break/continue in loops. Fixed support for the DMDFE hidden implicit return value variable. This can be needed for some foreach statements where the loop body is converted to a nested delegate, but also possibly returns from the function. Added std.math to phobos. Added AA runtime support code, done ground work for implementing AAs. Several other bugfixes.

--- a/gen/irstate.cpp	Tue Nov 20 00:02:35 2007 +0100
+++ b/gen/irstate.cpp	Tue Nov 20 05:29:20 2007 +0100
@@ -83,10 +83,6 @@
 
 llvm::BasicBlock* IRState::scopebb()
 {
-    return scopebegin();
-}
-llvm::BasicBlock* IRState::scopebegin()
-{
     IRScope& s = scope();
     assert(s.begin);
     return s.begin;