The following Fortran code, from the gamess CPU2006 benchmark, fails with an
ICE on the 4.1 branch when compiled with -m32 -O3.
SUBROUTINE RD2PDM(INFILE,TPDM,GBUF,LABS,NINTMX,IPIN)
C
IMPLICIT DOUBLE PRECISION(A-H,O-Z)
LOGICAL READMORE
INTEGER LABS(*),IPIN(*)
DOUBLE PRECISION TPDM(*),GBUF(*)
COMMON /PCKLAB/ LABSIZ
C
C CALL SEQREW(INFILE)
READMORE = .TRUE.
DO WHILE (READMORE)
NG = 0
CALL PREAD(INFILE,GBUF,LABS,NG,NINTMX)
IF (NG.LE.0) READMORE = .FALSE.
MG = IABS(NG)
DO M = 1, MG
C
C UNPACK LABELS
C
NPACK = M
IF (LABSIZ .EQ. 2) THEN
LABEL = LABS( 2*NPACK - 1 )
IPACK = ISHFT( LABEL, -16 )
JPACK = IAND( LABEL, 65535 )
LABEL = LABS( 2*NPACK )
KPACK = ISHFT( LABEL, -16 )
LPACK = IAND( LABEL, 65535 )
ELSE IF (LABSIZ .EQ. 1) THEN
LABEL = LABS(NPACK)
IPACK = ISHFT( LABEL, -24 )
JPACK = IAND( ISHFT( LABEL, -16 ), 255 )
KPACK = IAND( ISHFT( LABEL, -8 ), 255 )
LPACK = IAND( LABEL, 255 )
END IF
I = IPACK
J = JPACK
K = KPACK
L = LPACK
IJ = IPIN(MAX(I,J)) + MIN(I,J)
KL = IPIN(MAX(K,L)) + MIN(K,L)
IJKL = IPIN(MAX(IJ,KL)) + MIN(IJ,KL)
TPDM(IJKL) = GBUF(M)
END DO ! CURRENT BATCH
END DO ! NEXT BATCH
RETURN
END
temp> gfortran -c -O3 -m32 gamess-failure.f
gamess-failure.f: In function #rd2pdm#:
gamess-failure.f:45: internal compiler error: in trunc_int_for_mode, at
explow.c:54
Please submit a full bug report,
--
Summary: ICE in trunc_int_for_mode
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pthaugen at us dot ibm dot com
GCC build triplet: powerpc64-linux
GCC host triplet: powerpc64-linux
GCC target triplet: powerpc64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30113
