[Bug middle-end/31030] [4.3 Regression] Segmentation fault with -O2

["dominiq at lps dot ens dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from dominiq at lps dot ens dot fr  2007-03-11 13:16 -------
Note that the bug affect lapack/blas/{s,d}scal.f. Note also that in the
*optimized* dumps of
lapack/blas/{c,z}scal.f there are several:

Invalid sum of incoming frequencies xxxx, should be xxxx

cscal.f:

...
Invalid sum of incoming frequencies 2224, should be 2116
<L19>:;
  D.1073 = (<unnamed type>) ivtmp.47;
  CR.63 = MEM[index: D.1073];
  CI.64 = MEM[index: D.1073, offset: 4];
  MEM[index: D.1073] = CR.61 * CR.63 - CI.62 * CI.64;
  MEM[index: D.1073, offset: 4] = CR.61 * CI.64 + CI.62 * CR.63;
  ivtmp.44 = ivtmp.44 + 1;
  ivtmp.47 = ivtmp.47 + 8;
  if ((int4) ivtmp.44 == D.968) goto <L14>; else goto <L19>;

Invalid sum of incoming frequencies 2322, should be 2430
<L14>:;
  return;

and zscal.f:

...
Invalid sum of incoming frequencies 10511, should be 10000
<L24>:;
  D.1095 = (<unnamed type>) ivtmp.59;
  CR.21 = MEM[index: D.1095];
  CI.22 = MEM[index: D.1095, offset: 8];
  MEM[index: D.1095] = CR.64 * CR.21 - CI.65 * CI.22;
  MEM[index: D.1095, offset: 8] = CR.64 * CI.22 + CI.65 * CR.21;
  ivtmp.53 = ivtmp.53 + 1;
  ivtmp.59 = ivtmp.59 + ivtmp.62;
  if ((int4) ivtmp.53 == D.967) goto <L16>; else goto <L24>;

<L29>:;
  CR.19 = REALPART_EXPR <*za>;
  CI.20 = IMAGPART_EXPR <*za>;
  ivtmp.50 = (<unnamed type>) &REALPART_EXPR <(*zx)[0]>;
  ivtmp.47 = 0;

Invalid sum of incoming frequencies 4723, should be 4493
<L23>:;
  D.1079 = (<unnamed type>) ivtmp.50;
  CR.25 = MEM[index: D.1079];
  CI.26 = MEM[index: D.1079, offset: 8];
  MEM[index: D.1079] = CR.19 * CR.25 - CI.20 * CI.26;
  MEM[index: D.1079, offset: 8] = CR.19 * CI.26 + CI.20 * CR.25;
  ivtmp.47 = ivtmp.47 + 1;
  ivtmp.50 = ivtmp.50 + 16;
  if ((int4) ivtmp.47 == D.967) goto <L16>; else goto <L23>;

Invalid sum of incoming frequencies 4420, should be 5160
<L16>:;
  return;


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31030