On a 64-bit Ubuntu 6.10 system with gcc-4.2-20070228, gfortran erroneously
gives an error for good F90 code. In the code two parameter arrays are defined
then one is multiplied by a section of the other, with the section selected
with non-unit stride. An error is generated referencing the declaration of the
sectioned array. It looks like the array section is not being generated
properly, but simply writing the array section to stdout produces the expected
output.
The error is not produced if either of the arrays are not parameters, or the
array section is unit stride. gfortran from Ubuntu's gcc-4.1.2 gives the same
error.
[EMAIL PROTECTED] VielPotential]$ cat bugtest.f90
program PotentialMatrix
implicit none
real(kind=8),dimension(2),parameter::v2=(/1,2/)
real(kind=8),dimension(4),parameter::v4=(/1,2,3,4/)
write(*,*)v2*v4(1:3:2)
end
[EMAIL PROTECTED] VielPotential]$ gfortran -v -g -o bugtest bugtest.f90
Driving: gfortran -v -g -o bugtest bugtest.f90 -lgfortranbegin -lgfortran -lm
-shared-libgcc
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --disable-multilib --enable-languages=fortran
Thread model: posix
gcc version 4.2.0 20070228 (prerelease)
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.2.0/f951 bugtest.f90 -quiet
-dumpbase bugtest.f90 -mtune=generic -auxbase bugtest -g -version -I
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/finclude -o /tmp/cc5EhKbq.s
GNU F95 version 4.2.0 20070228 (prerelease) (x86_64-unknown-linux-gnu)
compiled by GNU C version 4.2.0 20070228 (prerelease).
GGC heuristics: --param ggc-min-expand=89 --param ggc-min-heapsize=112046
bugtest.f90:3.40:
real(kind=8),dimension(2),parameter::v2=(/1,2/)
1
Error: different shape for Elemental binary operation at (1) on dimension 1
(2/1)
bugtest.f90:3.40:
real(kind=8),dimension(2),parameter::v2=(/1,2/)
1
Error: Array operands are incommensurate at (1)
[EMAIL PROTECTED] VielPotential]$
--
Summary: Incorrect error: parameter array sections
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: terry at chem dot gu dot se
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31011
