RTL explaination

RTL explaination

[kernel coder]

hi,
I'm trying to understand the rtl genrated by gcc for mips processor.I
have read gcc internals by Richard Stallman but there  are still some
confusions in the rtl language.

Following is a snippet of code which i'm trying to understand.

(insn 9 6 10 (nil) (set (reg:SI 182)
        (mem/f:SI (symbol_ref:SI ("a")) [0 a+0 S4 A32])) -1 (nil)
    (nil))

In the above code following part is still unclear to me

[0 a+0 S4 A32])) -1 (nil)
    (nil))

Following is the c code for which above rtl is generated :

int a;
main()
{
a=a+1;
}


thanks,
shahzad

Re: RTL explaination

[Erik Mouw]

On Wed, Jun 07, 2006 at 05:54:43PM +0500, kernel coder wrote:
> I'm trying to understand the rtl genrated by gcc for mips processor.I
> have read gcc internals by Richard Stallman but there  are still some
> confusions in the rtl language.
> 
> Following is a snippet of code which i'm trying to understand.
> 
> (insn 9 6 10 (nil) (set (reg:SI 182)
>        (mem/f:SI (symbol_ref:SI ("a")) [0 a+0 S4 A32])) -1 (nil)
>    (nil))
> 
> In the above code following part is still unclear to me
> 
> [0 a+0 S4 A32])) -1 (nil)
>    (nil))
> 
> Following is the c code for which above rtl is generated :
> 
> int a;
> main()
> {
> a=a+1;
> }

I think you will get many more responses on a mailing list dedicated to
gcc... See http://gcc.gnu.org/lists.html .


Erik

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