llvm dev - Dec 2006 - [LLVMdev] Instructions having variable names as operands

Dear Mr. Lattner:

You have asked me how my instruction set works.

If I code like this:

int foo1()
{
    int x1,x2;
    x1 =1;
    x2 = foo2(x1);
    return x2;
}
                
int foo2(int k)
{
    if(k == 1)
       k = 2;
    
    return k;
}

int main ()
{
    int j;    
    j = foo1();
}

This should be emitted like this:

Enter foo1;  
reg x2, x1
add 1;x1
Call foo2;x1,x2
Exit foo1;  x2

Enter foo2;  k
reg temp0:1
cmp k,1;temp0
demultiplex m0;temp0;b1;b0
branch b0
	add 2;k
unbranch b0
branch b1
unbranch b1
mux m0
Exit foo2;  k

I am not sure about full source language scoping rules you mentioned. Would you
mind telling me about that?
Thank you very much.

Seung Jae Lee

On Wed, 20 Dec 2006, Seung Jae Lee wrote:
> I am not sure about full source language scoping rules you mentioned. Would
you mind telling me about that?
> Thank you very much.
I the example I gave, variable scoping rules allow you to have multiple 
different varibles with the same name.  How do you handle this?

-Chris

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