gimple assignment

gimple assignment

[charfi asma]

Hello,

According to the gcc internals doc  http://gcc.gnu.org/onlinedocs/gccint/Logical-Operators.html#Logical-Operators: 

a=b+c will be transformed to GIMPLE_ASSIGN <PLUS_EXPR, VAR_DECL <a>, VAR_DECL <b>, VAR_DECL <c> >

but when I generate gimple using gcc 4.4.2, I do not find the same presentation:
a gimple_assign tuple is not used, I find instead gimple_modify_stmt used without plus_expr.

did the internals correpend to previous gcc version. if yes, is there a more recent gimple doc.

Thank you

Asma

Re: gimple assignment

[Diego Novillo]

On Fri, Jan 15, 2010 at 09:49, charfi asma <charfiasma@yahoo.fr> wrote:

> but when I generate gimple using gcc 4.4.2, I do not find the same presentation:
> a gimple_assign tuple is not used, I find instead gimple_modify_stmt used without plus_expr.

That doesn't sound right.  Are you sure you are using 4.4.x?

$ gcc -c -fdump-tree-gimple-raw a.c
$ cat a.c.004t.gimple
foo (int i, int j)
gimple_bind <
  int D.1594;
  int x;

  gimple_assign <plus_expr, x, i, j>
  gimple_assign <var_decl, D.1594, x, NULL>
  gimple_return <D.1594>
>

$ gcc --version
gcc ([...]) 4.4.0
Copyright (C) 2009 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


Diego.

Re : gimple assignment

[charfi asma]

Hello Diego,

You are right.
I am so sorry, I used to use gcc3.4.2 and not gcc 4.4.2
now, when I update my gcc I find the same presentation explained in http://gcc.gnu.org/onlinedocs/gccint/

thank you.





----- Message d'origine ----
De : Diego Novillo <dnovillo@google.com>
À : charfi asma <charfiasma@yahoo.fr>
Cc : gcc-help@gcc.gnu.org
Envoyé le : Jeu 28 Janvier 2010, 17 h 07 min 34 s
Objet : Re: gimple assignment

On Fri, Jan 15, 2010 at 09:49, charfi asma <charfiasma@yahoo.fr> wrote:

> but when I generate gimple using gcc 4.4.2, I do not find the same presentation:
> a gimple_assign tuple is not used, I find instead gimple_modify_stmt used without plus_expr.

That doesn't sound right.  Are you sure you are using 4.4.x?

$ gcc -c -fdump-tree-gimple-raw a.c
$ cat a.c.004t.gimple
foo (int i, int j)
gimple_bind <
  int D.1594;
  int x;

  gimple_assign <plus_expr, x, i, j>
  gimple_assign <var_decl, D.1594, x, NULL>
  gimple_return <D.1594>
>

$ gcc --version
gcc ([...]) 4.4.0
Copyright (C) 2009 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


Diego.