Compiling this piece of code: c=================================================================== SUBROUTINE SETGRDREC (NMREC,ZREC,KK,Z,IREC) DIMENSION Z(KK) DIMENSION ZREC(NMREC,KK) i = 0 DO K=1,KK ZREC(IREC,I) = Z(I) ENDDO END c=================================================================== with the following command: gfortran -O2 -Wall -Wextra -ftree-vectorize -c bug.F -o bug.o results in: =================================================================== problem.F: In function 'setgrdrec': problem.F:1: error: Definition in block 2 does not dominate use in block 5 for SSA_NAME: TMT.7_31 in statement: # TMT.7_25 = V_MAY_DEF <TMT.7_31>; (*zrec_28)[D.821_23] = lsm_tmp.9_15; problem.F:1: internal compiler error: verify_ssa failed. =================================================================== It compiles without problems without -ftree-vectorize or -O1 or lower. output of gfortran -v: =================================================================== Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: ./configure --prefix=/home/vici --enable-languages=f95 : (reconfigured) ./configure --prefix=/home/vici --enable-languages=f95 Thread model: posix gcc version 4.1.0 20050601 (experimental) =================================================================== Output of uname -a: Linux galadriel 2.6.11.4-20a-default #1 Wed Mar 23 21:52:37 UTC 2005 x86_64 x86_64 x86_64 GNU/Linux
-- Summary: ICE with -ftree-vectorize and -O2 or higher Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: fischer at td dot mw dot tum dot de CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21859