On Wed, May 16, 2007 at 11:16:59AM +0530, Rahul wrote:
> But for -O0 optimization, even the 'progname.c.*.combine file' is
> *not* getting generated for '-fdump-rtl-all / -fdump-rtl-combine'
> options.
The *.combine dumpfile is generated when the combine pass runs.
> Please tell me whether th
On 5/12/07, Paul Brook <[EMAIL PROTECTED]> wrote:
> But for the following example
> int a = 1;
> int b = 2;
> int c = 3;
> c = c + a * b;
> the MAC pattern is not getting recognized, instead it is still using
> PLUS and MULT patterns.
Your example is bogus. This is optimized to "c = 5" w
> But for the following example
> int a = 1;
> int b = 2;
> int c = 3;
> c = c + a * b;
> the MAC pattern is not getting recognized, instead it is still using
> PLUS and MULT patterns.
Your example is bogus. This is optimized to "c = 5" well before we get to RTL.
Paul
On May 11, 2007, at 11:31, Andrew Haley wrote:
It shouldn't have. All args are ints, and if we are assuming (as the
C standard says) that int overflow is undefined, the transformation is
valid.
Aarghh..! I even quoted the part that mentioned ints, but still thought
it was about float. Sure,
Geert Bosch writes:
>
> On May 11, 2007, at 08:26, Rahul wrote:
> > But for the following example
> > int a = 1;
> > int b = 2;
> > int c = 3;
> > c = c + a * b;
> > the MAC pattern is not getting recognized, instead it is still using
> > PLUS and MULT patterns.
>
> In general, thi
On May 11, 2007, at 08:26, Rahul wrote:
But for the following example
int a = 1;
int b = 2;
int c = 3;
c = c + a * b;
the MAC pattern is not getting recognized, instead it is still using
PLUS and MULT patterns.
In general, this transformation is not valid, as it has
different rounding beha
On Fri, May 11, 2007 at 05:56:16PM +0530, Rahul wrote:
> I have PLUS, MULT and following MAC pattern, in my target.md file.
> (define_insn ""
> [(set (match_operand:SI 0 "data_reg" "=f")
> (plus:SI (mult:SI (match_operand:SI 1 "data_reg" "f")
> (match_ope
[EMAIL PROTECTED] wrote on 11/05/2007 15:26:16:
> Hello all,
>
> I am working on gcc v4.1.1 for a non-gcc target. I want to support
> 'MAC' instruction
> (mac OP1, OP2, OP3 => OP3 += OP1 * OP2).
>
http://gcc.gnu.org/ml/gcc/2007-05/msg00114.html seems relevant to your
problem.
Revital
>
>
> R
