Changed the handling of variadic intrinsics a bit. Removed the -fp80 option and made real be 80bit floats on X86, this is what the D spec really says it should be and fixes a bunch of issues. Changed the handling of parameter attributes to a bit more generalized approach. Added sext/zext attributes for byte/short/ubyte/ushort parameters, fixes #60 . Parameter attribs now properly set for intrinsic calls if necessary. Made the tango.math.Math patch less intrusive. Fixed/added some mini tests.

--- a/gen/tollvm.h	Fri Aug 01 01:12:33 2008 +0200
+++ b/gen/tollvm.h	Fri Aug 01 17:59:58 2008 +0200
@@ -21,6 +21,8 @@
 // returns if the type should be returned in a hidden pointer arguement
 bool DtoIsReturnedInArg(Type* type);
 
+unsigned DtoShouldExtend(Type* type);
+
 // resolve typedefs to their real type.
 // TODO should probably be removed in favor of DMD's Type::toBasetype
 Type* DtoDType(Type* t);