[Bug fortran/5900] [g77 & gfortran] Lapack regressions since g77 2.95.2

["Thomas dot Koenig at online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From Thomas dot Koenig at online dot de  2005-01-31 14:38 -------
This is with the 20050130 snapshot on ia64-unknown-linux-gnu,
-O3 and with flag_complex_divide_method = 1.  The files slasy2.f
and dlasy2.f are compiled with -O0, to get around PR 18977.

cgd.out: CGV drivers:     61 out of   1092 tests failed to pass the threshold
csep.out: CST:    2 out of  4662 tests failed to pass the threshold
csep.out: CST drivers:      1 out of  11664 tests failed to pass the threshold
ded.out: DES:    2 out of  3264 tests failed to pass the threshold
ded.out: DSX:    2 out of  3494 tests failed to pass the threshold
dgd.out: DXV drivers:    200 out of   5000 tests failed to pass the threshold
sgd.out: SXV drivers:     37 out of   5000 tests failed to pass the threshold
ssep.out: SST:    2 out of  4662 tests failed to pass the threshold
ssep.out: SST drivers:      1 out of  14256 tests failed to pass the threshold
zgd.out: ZGV drivers:     61 out of   1092 tests failed to pass the threshold
zgd.out: ZXV drivers:     24 out of   5000 tests failed to pass the threshold

This is looking pretty good, on the whole.  The DES and DSX failures
are a bit suspect:

 N=    5, IWK= 1, seed= 100,2082,  33, 613, type 17, test( 7)= 0.450E+16
 DDRVES: DGEES1 returned INFO=     6.
         N=     5, JTYPE=    17, ISEED=(  100, 2082,   33,  613)
 N=    5, IWK= 2, seed= 100,2082,  33, 613, type 17, test( 7)= 0.450E+16
 DES:    2 out of  3264 tests failed to pass the threshold
 *** Error code from  DGEES =    6

 DGET24: DGEESX1 returned INFO=     6.
         N=     5, JTYPE=    17, ISEED=(  100, 2082,   33,  613)
 N=    5, IWK= 2, seed= 100,2082,  33, 613, type 17, test( 7)= 0.450E+16
 DSX:    2 out of  3494 tests failed to pass the threshold

The condition numbers are quite high.  There may or may not be an
optimizer bug hidden there.  I'll look around if I can isolate
anything, and open a separate PR then.

        Thomas

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5900