At revision 150716 the polyhedron test linpk.f90 compiled with -fwholefile at
-O3 does not give the right results:
[ibook-dhum] lin/test% gfc -O3 linpk.f90
[ibook-dhum] lin/test% time a.out
norm. resid resid machep x(1) x(n)
2.50952975D+01 2.78588264D-11 2.22044605D-16 1.00000000D+00
1.00000000D+00
27.756u 0.194s 0:28.12 99.3% 0+0k 0+0io 25pf+0w
[ibook-dhum] lin/test% gfc -O3 -fwhole-file linpk.f90
[ibook-dhum] lin/test% time a.out
norm. resid resid machep x(1) x(n)
NaN 0.00000000D+00 2.22044605D-16 NaN
NaN
4.808u 0.071s 0:04.89 99.5% 0+0k 0+0io 0pf+0w
[ibook-dhum] lin/test% gfc -O2 -fwhole-file linpk.f90
[ibook-dhum] lin/test% time a.out
norm. resid resid machep x(1) x(n)
2.50952975D+01 2.78588264D-11 2.22044605D-16 1.00000000D+00
1.00000000D+00
27.807u 0.232s 0:28.22 99.3% 0+0k 0+0io 0pf+0w
[ibook-dhum] lin/test% gfc -m64 -O3 -fwhole-file linpk.f90
[ibook-dhum] lin/test% time a.out
norm. resid resid machep x(1) x(n)
NaN 0.00000000D+00 2.22044605D-16 NaN
NaN
5.016u 0.068s 0:05.18 97.8% 0+0k 0+0io 29pf+0w
--
Summary: Wrong code for polyhedron test linpk.f90 compiled with -
fwholefile at -O3
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dominiq at lps dot ens dot fr
GCC build triplet: *-apple-darwin9
GCC host triplet: *-apple-darwin9
GCC target triplet: *-apple-darwin9
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41056
