[cfe-dev] Objective-C: methods, ivars, and cleanup

David Chisnall csdavec at swansea.ac.uk
Thu Mar 27 06:46:44 PDT 2008


One more try...

On 26 Mar 2008, at 18:29, Chris Lattner wrote:

> @@ -341,6 +345,17 @@
>        return LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD, false));
>      else {
>        llvm::Value *V = LocalDeclMap[D];
> +      // Check if it's an implicit argument
> +      // TODO: Other runtimes may set non-argument hidden variables
> +      if (!V) {
> +        std::string VarName(D->getName());
> +        llvm::Function::arg_iterator AI = CurFn->arg_begin();
> +        do {
> +          if(VarName == AI->getName()) {
> +            return LValue::MakeAddr(AI);
> +          }
> +        } while(++AI);
> +      }
>        assert(V && "BlockVarDecl not entered in LocalDeclMap?");
>
> This is incredibly inefficient, what are you trying to accomplish
> here?


I have now fixed this (I hope) by adding the self decl from the method  
to the local decls map.  That gets rid if this hack for accessing  
instance variables on self.  It does not work for _cmd (or _call in  
the √Čtoil√© runtime).  I suggest the best way of doing this is to have  
a companion class for CGObjCRuntime in Sema which provides the decls  
for the runtime in use at the time (pulling the code out of  
ObjCActOnStartOfMethodDef).  If you agree that's a sensible approach,  
then I'll add this in the next patch.

I've also removed the three methods in CGObjCGNU that are not yet used.

David
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