[Bug tree-optimization/32691] New: fold *(float*)(&complex_float_var) into REALPART_EXPR in when &cfv is in a different statement

[pinskia at gcc dot gnu dot org]

Testcase:
float
quantum_real(float _Complex a)
{
  float *p = (float *) &a;
  return p[0];
}
float
quantum_imag(float _Complex a)
{
  float *p = (float *) &a;
  return p[1];
}


------- CUT -----
Even though the above are optimized at the RTL level, it would be nice if we
could get them optimized at the TREE level also.
We already optimize ((float *) &a)[0] and ((float *) &a)[1] via PR 26134.

This should help libquantum in SPEC 2k6 also.


-- 
           Summary: fold *(float*)(&complex_float_var) into
                    REALPART_EXPR<complex_float_var> in when &cfv is in a
                    different statement
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, TREE
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
OtherBugsDependingO 26163
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32691