Prefer more specific functions to DtoResolveDsymbol.

The remaining ones should also be easy to remove with a
closer look at the situation.

Ideally, we would get rid of all of them at some point and
use safe wrapper functions for accessing the IrDsymbol
associated with a given declaration (which would emit the
declarations on the fly if not already present).

gen/llvmhelpers.cpp

@@ -1879,7 +1879,7 @@ DValue* DtoSymbolAddress(const Loc& loc, Type* type, Declaration* decl)
             // take care of forward references of global variables
             const bool isGlobal = vd->isDataseg() || (vd->storage_class & STCextern);
             if (isGlobal)
-                DtoResolveDsymbol(vd);
+                DtoResolveVariable(vd);
 
             assert(vd->ir.isSet() && "Variable not resolved.");