I just tried to compile Fortran package LAPACK with the GNU Fortran compiler version 4.3 snapshot 20070525
The compiler said /home/dcb/gcc/20070525/results/bin/gfortran -g -O3 -Wall -c clanht.f -o clanht.o clanht.f: In function 'clanht': clanht.f:1: error: found a virtual definition for a GIMPLE register PHI argument D.1410_62 for PHI node e__I_lsm0.52_95 = PHI <D.1410_62(21), e__I_lsm0.52_94(25)> clanht.f:1: internal compiler error: verify_ssa failed Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Source code attached. Flag -O3 required. -- Summary: ice for legal fortran code with -O3 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: x86_sue-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32160
