[Bug middle-end/68492] New: [6 Regression] internal compiler error: in vect_is_simple_use, at tree-vect-stmts.c:8266

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68492

            Bug ID: 68492
           Summary: [6 Regression] internal compiler error: in
                    vect_is_simple_use, at tree-vect-stmts.c:8266
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: rguenther at suse dot de
  Target Milestone: ---

On i686, r230020 caused:

gfortran -m32  -O3 -funroll-loops -msse2 -mfpmath=sse -ffast-math
-fwhole-program -flto=jobserver -fuse-linker-plugin          types.fppized.o
system.fppized.o str.fppized.o int.fppized.o real.fppized.o intvec.fppized.o
realvec.fppized.o binmat.fppized.o cpxvec.fppized.o realmat.fppized.o
parallel.fppized.o intmat.fppized.o buffer.fppized.o intvecvec.fppized.o
strvec.fppized.o binvec.fppized.o unitnumber.fppized.o textfile.fppized.o
opvector.fppized.o file.fppized.o cpxmat.fppized.o opmatrix.fppized.o
archive.fppized.o diis.fppized.o reflection.fppized.o cif.fppized.o
cpxmat3.fppized.o realmat3.fppized.o spacegroup.fppized.o slatershell.fppized.o
slatershellvec.fppized.o interpolator.fppized.o slaterbasis.fppized.o
shell1.fppized.o unitcell.fppized.o shell.fppized.o shellvec.fppized.o
basis.fppized.o coppensorbital.fppized.o coppensorbitalvec.fppized.o
coppensbasis.fppized.o atom.fppized.o reflectionvec.fppized.o rys.fppized.o
cpxmat4.fppized.o gaussian.fppized.o gaussian2.fppized.o realmat4.fppized.o
intmat3.fppized.o shell2.fppized.o atomvec.fppized.o crystal.fppized.o
scfdata.fppized.o basisvec.fppized.o realmat5.fppized.o gaussian4.fppized.o
shell4.fppized.o time.fppized.o colour.fppized.o colourfunction.fppized.o
intvecmat3.fppized.o intvecintvechash.fppized.o marchingcube.fppized.o
plotgrid.fppized.o isosurface.fppized.o realmat3vec.fppized.o cluster.fppized.o
cpxmat5.fppized.o shellpair.fppized.o shellpairvec.fppized.o
coppensbasisvec.fppized.o irrep.fppized.o irrepvec.fppized.o
pointgroup.fppized.o slaterbasisvec.fppized.o shell1quartet.fppized.o
roby.fppized.o dftgrid.fppized.o mol.fppized.o mol_main.fppized.o
run_mol.fppized.o blas.o lapack.o                     -o tonto
mol.fppized.f90: In function 'd_sfchi2_d_thermal':
mol.fppized.f90:20073:0: internal compiler error: in vect_is_simple_use, at
tree-vect-stmts.c:8266
    function d_sfchi2_d_thermal(U) result(res)


Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[1]: *** [/tmp/ccNjbbMQ.ltrans8.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.