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

[Thomas dot Koenig at online dot de]

------- Additional Comments From Thomas dot Koenig at online dot de  2005-01-26 09:22 -------
I have just run a Lapack test on ia64-unknown-linux-gnu, under the
following conditions:

I used the 20050123 snapshot with wide complex scaling, i.e. the fix for PR 19486
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-complex.c.diff?cvsroot=gcc&r1=2.15&r2=2.16
and the fix for PR 19609
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-complex.c.diff?cvsroot=gcc&r1=2.17&r2=2.18
applied.  I then set int flag_complex_divide_method = 1 in toplev.c, and
bootstrapped.

For Lapack, I used 3.0 from netlib with all files from
ftp://www.netlib.org/lapack/patch.tar.gz overwritten.

Now here are the results:

 CST:    1 out of  4662 tests failed to pass the threshold
 CST drivers:      1 out of  11664 tests failed to pass the threshold
 CST:    1 out of  4662 tests failed to pass the threshold
 CST drivers:      1 out of  11664 tests failed to pass the threshold
 CST drivers:      1 out of  11664 tests failed to pass the threshold
 DXV drivers:    200 out of   5000 tests failed to pass the threshold
 SXV drivers:     37 out of   5000 tests failed to pass the threshold
 SST:    1 out of  4662 tests failed to pass the threshold
 SST drivers:      1 out of  14256 tests failed to pass the threshold
 ZXV drivers:     24 out of   5000 tests failed to pass the threshold

This is BRILLIANT.  If you compare this with comment #12, the results
are identical to the g77 results.  There is no g77 regression at -O0
any more!

I think PR 18902 has just moved to critical, at least for gfortran.
I'll add a comment there.

I will rerun tests at -O1 and see what I can get.

        Thomas

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