[Bug target/40030] New: vector float * vector float + vector float should produce only vmaddfp

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* [Bug target/40030]  New: vector float * vector float + vector float should produce only vmaddfp
@ 2009-05-05 18:03 pinskia at gcc dot gnu dot org
  2009-05-05 18:03 ` [Bug target/40030] " pinskia at gcc dot gnu dot org
  0 siblings, 1 reply; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-05-05 18:03 UTC (permalink / raw)
  To: gcc-bugs

Take:
#define vector __vector

vector float f(vector float a, vector float b, vector float c)
{
  return a * b + c;
}
--- CUT ---
Currently for Powerpc (with -O2 -maltivec), we get:
        vspltisw 0,-1
        vslw 0,0,0
        vmaddfp 3,2,3,0
        vaddfp 2,3,4

But this should really just produce:
        vmaddfp 2,2,3,4


-- 
           Summary: vector float * vector float + vector float should
                    produce only vmaddfp
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
GCC target triplet: powerpc*-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40030


^ permalink raw reply	[flat|nested] 3+ messages in thread

* [Bug target/40030] vector float * vector float + vector float should produce only vmaddfp
  2009-05-05 18:03 [Bug target/40030] New: vector float * vector float + vector float should produce only vmaddfp pinskia at gcc dot gnu dot org
@ 2009-05-05 18:03 ` pinskia at gcc dot gnu dot org
  0 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-05-05 18:03 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #1 from pinskia at gcc dot gnu dot org  2009-05-05 18:03 -------
Another testcase but using intrinsics:
#include <altivec.h>

vector float f(vector float a, vector float b, vector float c)
{
  vector float d = (vector float)(-0.0f);
  return vec_add (c, vec_madd (a, b, d));
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40030


^ permalink raw reply	[flat|nested] 3+ messages in thread

[parent not found: <bug-40030-4@http.gcc.gnu.org/bugzilla/>]

* [Bug target/40030] vector float * vector float + vector float should produce only vmaddfp
       [not found] <bug-40030-4@http.gcc.gnu.org/bugzilla/>
@ 2012-01-19  4:38 ` pinskia at gcc dot gnu.org
  0 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-19  4:38 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40030

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.6.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-19 04:09:14 UTC ---
The original testcase is fixed so just closing as fixed.


^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2012-01-19  4:09 UTC | newest]

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2009-05-05 18:03 [Bug target/40030] New: vector float * vector float + vector float should produce only vmaddfp pinskia at gcc dot gnu dot org
2009-05-05 18:03 ` [Bug target/40030] " pinskia at gcc dot gnu dot org
     [not found] <bug-40030-4@http.gcc.gnu.org/bugzilla/>
2012-01-19  4:38 ` pinskia at gcc dot gnu.org

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