o
    !iO                     @   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mZ d dlmZ d dlmZ d dlmZ d dlZG dd de jZG d	d
 d
eZde	ejje
f de	ejje
f fddZdS )    N)FunctionType)castUnionCallableDictOptionalAny)Tracer)Graph)normalize_source_linesc                   @   s.   e Zd ZdZdef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sKJ |	|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   m/var/www/html/eduruby.in/lip-sync/lip-sync-env/lib/python3.10/site-packages/torch/fx/experimental/rewriter.pychange_func_globals.   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sJ |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_Assert?   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_AnnAssignS   s   	
zAST_Rewriter.visit_AnnAssignN)r   
__module____qualname____doc__r   r5   rF   rQ   r   r   r   r   r      s
    
'r   c                       sD   e Zd Zddeejjef dee	e
ef  def fddZ  ZS )RewritingTracerNrootconcrete_argsreturnc                    s   t  t||S N)supertrace_rewrite)r0   rV   rW   	__class__r   r   r[   b   s   zRewritingTracer.tracerY   )r   rR   rS   r   torchnnModuler   r   r   strr   r
   r[   __classcell__r   r   r]   r   rU   a   s    <rU   r   rX   c                    s>   t | tjjrdtjjf fdd  | S t tt| 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 rY   )	rZ   __init____dict__itemsr:   r_   r`   ra   r   )r0   origkv)r^   rewrite_moduler   r   re   m   s   
zB_rewrite.<locals>.rewrite_module.<locals>.RewrittenModule.__init__)r   rR   rS   re   rc   r   rk   r]   r   RewrittenModulel   s    rm   )r_   r`   ra   r   r5   r   r   forward)rd   rm   rl   r   r   rk   k   s   z _rewrite.<locals>.rewrite_module)r:   r_   r`   ra   r   r5   r   r   )r   r   rl   r   r\   f   s   r\   )r&   r!   r$   r   r   typesr   typingr   r   r   r   r   r   Ztorch.fx._symbolic_tracer	   Ztorch.fx.graphr
   Ztorch._sourcesr   r_   NodeTransformerr   rU   r`   ra   r\   r   r   r   r   <module>   s     T.