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From: "steven at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug optimization/13718] Miscompilation of comparison of complex values
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X-SW-Source: 2004-01/txt/msg01984.txt.bz2
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------- Additional Comments From steven at gcc dot gnu dot org  2004-01-17 15:00 -------
Here is another nice one: 
--------------------------- 
extern void foo( _Complex float a, _Complex float b); 
 
int main() 
{ 
  _Complex float v; 
  v = 0; 
  foo (v, v); 
} 
--------------------------- 
 
----> t.c.t23.sra: 
Scalar replacements for main: 
 
__real__ v -> SR.1 
__imag__ v -> SR.2 
 
;; Function main (main) 
main () 
{ 
  float SR.2; 
  float SR.1; 
  complex float v; 
<bb 0>: 
  SR.1_2 = 0.0; 
  SR.2_3 = 0.0; 
  v = COMPLEX_EXPR <SR.1_2, SR.2_3>; 
  v = COMPLEX_EXPR <SR.1_2, SR.2_3>; 
  foo (v, v); 
  return; 
} 
 
 
----> t.c.t33.optimized 
;; Function main (main) 
main () 
{ 
  complex float v; 
<bb 0>: 
  v = __complex__ (0.0, 0.0); 
  v = __complex__ (0.0, 0.0); 
  foo (v, v); 
  return; 
} 
 
 
SRA for complex seems to just not work yet.  RTH, you worked on 
this, so I have assigned this bug to you. 
 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rth at redhat dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13718