This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug fortran/17568] New: ISHFT intrinsic: bogus overflow error
- From: "anlauf at hep dot tu-darmstadt dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Sep 2004 12:23:43 -0000
- Subject: [Bug fortran/17568] New: ISHFT intrinsic: bogus overflow error
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
Hi,
the following code
program gfcbug9
implicit none
integer, parameter :: nbits = bit_size (1)
integer :: res
res = ishft (1, nbits-1)
print *, res
end program gfcbug9
fails to compile with the error message:
In file gfcbug9.f90:5
res = ishft (1, nbits-1)
1
Error: Result of ISHFT overflows its kind at (1)
This is a bug. AFAIK all bits that drop out left or right just
should get lost. The only constraint (abs(shift) < bit_size) is
satisfied.
Cheers,
-ha
--
Summary: ISHFT intrinsic: bogus overflow error
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: anlauf at hep dot tu-darmstadt dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-pc-cygwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17568