a
    h\                     @   s   d dl Z d dlZd dlZd dlZd dlZd dlmZ d dlmZm	Z	m
Z
mZmZ d dlZd dlmZ d dlmZ d dlmZ G dd de jZG d	d
 d
eZeejje	f eejje	f dddZdS )    N)FunctionType)AnyCallablecastOptionalUnion)normalize_source_lines)Tracer)Graphc                   @   s6   e Zd ZdZejjedddZdd Z	dd Z
d	S )
AST_Rewriterax  
    Take a FunctionType object representing a `forward` method, then
    perform an AST rewrite to swap out nodes that are not symbolically
    traceable with a callsite to the FX alternative.

    To support swapping out an AST node, define a new `visit` method on
    that node. For more details, see:
    https://docs.python.org/3/library/ast.html#ast.NodeTransformer
    fnc                 C   s   t |\}}t|}d|}t|}t|}t| 	|}t
|dd}t|j}	t|	 }
t||	 tt|	 |
 }t|dksJ |	|d  }dd }|||jdS )N exec   r   c                 S   s8   t | j|| j| j| jd}t|| }t| j|_|S )z?Based on https://stackoverflow.com/a/13503277/2988730 (@unutbu))nameZargdefsclosure)	r   __code____name____defaults____closure__	functoolsupdate_wrappercopy__kwdefaults__)fglobalsg r   L/var/www/auris/lib/python3.9/site-packages/torch/fx/experimental/rewriter.pychange_func_globals6   s    z1AST_Rewriter.rewrite.<locals>.change_func_globals)r   )inspectgetsourcelinesr   jointextwrapdedentastparsefix_missing_locationsvisitcompiler   __globals__setkeysr   listlen)selfr   sourcelines_sourceZnormalized_strZ
source_astZdest_astcodeZglobals_dictZkeys_beforeZnew_keysZfn_compiledr    r   r   r   rewrite    s    



zAST_Rewriter.rewritec                 C   sr   t jddd}t|t jsJ |j}t|t js4J |jr@|jnt jddd}|j|g|_	t j
|d}t ||S )z
        Swap out the Assert node (Python's `assert`) with a callsite to the
        symbolically-traceable torch._assert function
        ztorch._assert()eval)moder   N)valuekind)r8   )r&   r'   
isinstance
ExpressionbodyCallmsgConstanttestargsExprcopy_location)r0   nodenZ	call_noder>   Zexpr_wrapperr   r   r   visit_AssertH   s    zAST_Rewriter.visit_Assertc                 C   s4   t j|jgt jt jdt  d|j|jgg ddS )a  
        Swap out Python's AnnAssign with an Assign node where the annotation function is called.
        Example:
             Original:
             y: Tensor_Type(1,2,3, Dyn) = f2(x)
            Output:
             y = annotate(f2(x),Tensor_Type((1,2,3,Dyn)))
        Zannotate)idctx)funcrA   keywords)targetsr8   )r&   Assigntargetr=   NameLoadr8   
annotation)r0   rD   r   r   r   visit_AnnAssign\   s    	
zAST_Rewriter.visit_AnnAssignN)r   
__module____qualname____doc__torchZ_dynamodisabler   r5   rF   rQ   r   r   r   r   r      s
   'r   c                       s@   e Zd Zdeejjef ee	e
ef  ed fddZ  ZS )RewritingTracerN)rootconcrete_argsreturnc                    s   t  t||S N)supertrace_rewrite)r0   rX   rY   	__class__r   r   r]   p   s    zRewritingTracer.trace)N)r   rR   rS   r   rU   nnModuler   r   dictstrr   r
   r]   __classcell__r   r   r_   r   rW   o   s    rW   )r   rZ   c                    sB   t | tjjr,tjjd fdd  | S t tt| S d S )N)mc                    s6   G  fdddt jj}t tt| j|_|| S )Nc                       s   e Zd Z fddZ  ZS )z9_rewrite.<locals>.rewrite_module.<locals>.RewrittenModulec                    sV   t    |j D ]<\}}t|tjjr@t|| j|< qt|| j|< qd S r[   )	r\   __init____dict__itemsr:   rU   ra   rb   r   )r0   origkv)r`   rewrite_moduler   r   rg      s
    
zB_rewrite.<locals>.rewrite_module.<locals>.RewrittenModule.__init__)r   rR   rS   rg   re   r   rm   r_   r   RewrittenModule~   s   ro   )rU   ra   rb   r   r5   r   r   Zforward)rf   ro   rn   r   r   rm   }   s
    	
z _rewrite.<locals>.rewrite_module)r:   rU   ra   rb   r   r5   r   r   r   r   rn   r   r^   x   s    r^   )r&   r   r   r!   r$   typesr   typingr   r   r   r   r   rU   Ztorch._sourcesr   Ztorch.fx._symbolic_tracer	   Ztorch.fx.graphr
   NodeTransformerr   rW   ra   rb   r^   r   r   r   r   <module>   s   ^	