When I compile the subroutine (pasted at the end of this report) with
gfortran -c -ffree-form -O3 bug.f90
The compiler crashes with the output
bug.f90: In function 'subbug':
bug.f90:1: internal compiler error: in compare_values_warnv, at tree-vrp.c:1031
Please submit a full bug report,
with preprocessed source if appropriate.
It does not crash with -O2
This is my compiler version
gfortran -v
Using built-in specs.
Target: i386-apple-darwin9.4.0
Configured with: ../gcc-4.4-20080801/configure --enable-languages=fortran
Thread model: posix
gcc version 4.4.0 20080801 (experimental) (GCC)
Finally here is the subroutine "bug.f90"
subroutine subbug(data, n1,n2,n3)
implicit none
integer(kind(1)) :: i,j,k, ngr, n1,n2,n3
real(kind(1.0d0)) :: data((n1+2)*n2*n3)
ngr = n1*n2*n3
data(2:ngr+2*n2*n3:2) = -data(2:ngr+2*n2*n3:2)
data = RESHAPE((/ &
(((data(i+(j-1)*n1+(k-1)*n1*n2),i=1, n1), &
data(ngr+1+(j-1)*2+(k-1)*2*n2), &
data(ngr+2+(j-1)*2+(k-1)*2*n2),j=1,n2),k=1,n3 ) &
/),SHAPE=(/ngr+2*n2*n3/))
end subroutine subbug
--
Summary: compiler crash with -O3
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pierphil at xs4all dot nl
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40349
