addin new pass to gimple

addin new pass to gimple

[anandulle]

hi 

i am trying to add new pass to gimple , my task is to find out how many
Arithmetic operators are there in a given program.

1) i know that i have to create a struct tree_opt_pass  i have done that
also, 
2) i have added the following line s to tree-pass.h  
extern struct tree_opt_pass 
3) included next pass in passes.c 
4) i have got the function to print the assigiment statements but i have
doubts in that kindly help me 


the code is ------------------

void process_statement(tree stmt)
{
  tree lval,rval;
		switch (TREE_CODE(stmt)){
			case GIMPLE_MODIFY_STMT:					 
				lval=GIMPLE_STMT_OPERAND(stmt,0);
				rval=GIMPLE_STMT_OPERAND(stmt,1);
				if(TREE_CODE(lval) == VAR_DECL) {
					if(!DECL_ARTIFICIAL(lval)){
						//print_generic_stmt(stderr,stmt,0);
						numassigns++;
					}	
					totalassigns++;				
				}
				break;
			default :
				break;	
		}    		
}

Now i want to know what is VAR_DECL and where can i search for that , if I
have to change my code to print Arithmetic statements what other than
VAR_DECL can I use kindly any body know abut gimple optimization help me in
this regard
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Re: addin new pass to gimple

[Diego Novillo]

On Thu, Jul 23, 2009 at 08:54, anandulle<anandulle@gmail.com> wrote:

> void process_statement(tree stmt)
> {
>  tree lval,rval;
>                switch (TREE_CODE(stmt)){
>                        case GIMPLE_MODIFY_STMT:
>                                lval=GIMPLE_STMT_OPERAND(stmt,0);
>                                rval=GIMPLE_STMT_OPERAND(stmt,1);
>                                if(TREE_CODE(lval) == VAR_DECL) {
>                                        if(!DECL_ARTIFICIAL(lval)){
>                                                //print_generic_stmt(stderr,stmt,0);
>                                                numassigns++;
>                                        }
>                                        totalassigns++;
>                                }
>                                break;
>                        default :
>                                break;
>                }
> }
>
> Now i want to know what is VAR_DECL and where can i search for that , if I
> have to change my code to print Arithmetic statements what other than
> VAR_DECL can I use kindly any body know abut gimple optimization help me in
> this regard

You don't really need to parse the structure of the statement that
way.  The code to detect assignments looks correct.  To see what kind
of expression you have on the RHS, simply check TREE_CODE (rval)

If you just want to traverse the operands in the statement, you can
use FOR_EACH_SSA_TREE_OPERAND.  Something like:

ssa_op_iter i;
tree op;
tree stmt;
FOR_EACH_SSA_TREE_OPERAND (op, stmt, i, SSA_OP_USE)
   ....

'op' will be one of the operands at each iteration of the loop.
'stmt' is the statement you're looking at.  SSA_OP_USE is a filter
that states that you're only interested in real operands.  Look up the
documentation in the internals manual for more detail.

You're using a version earlier than 4.4, so I may be off in the
details.  But I don't think we changed the API for this too much
recently.


Diego.

addin new pass to gimple

[anandulle]

hello 

              I am ameture and i want to learn gcc -gimple IR , gimple pass;
where do i get the information or if you could show me an example let say
counting the number of var declaration stmts in a given program it will be
helpful .

Help needed badly please help me
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addin new pass to gimple

[anandulle]

hello 

              I am ameture and i want to learn gcc -gimple IR , gimple pass;
where do i get the information or if you could show me an example let say
counting the number of var declaration stmts in a given program it will be
helpful .

Help needed badly please help me
-- 
View this message in context: http://www.nabble.com/addin-new-pass-to-gimple-tp24698032p24698032.html
Sent from the gcc - Help mailing list archive at Nabble.com.