[Bug c++/35117] Vectorization on power PC

[eyal at geomage dot com]

------- Comment #10 from eyal at geomage dot com  2008-02-07 12:58 -------
(In reply to comment #9)
> (In reply to comment #8)
> > {
> >         float *pTempSumPhase_Temp_cre_angle = (float*) malloc (sizeof(float)
> > *m_nSamples);
> >         float *pTempSum2Phase_Temp_cre_angle = (float*) malloc (sizeof(float)
> > *m_nSamples);
> > 
> >         memset(pTempSumPhase_Temp_cre_angle,0,sizeof(float)* m_nSamples);
> >         memset(pTempSum2Phase_Temp_cre_angle,0,sizeof(float)* m_nSamples);
> Maybe the problem is that they escape (call to memset)...
> The alias analysis fails to distinguish between these two pointers and the
> vectorizer has to create runtime checks.

I've commented the memset operation and still get the 
"created 8 versioning for alias checks." message.

Is there some pragma or a coding convention I can use to make the compiler
understant those pointers have nothing to do with each other?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35117