https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68453
Bug ID: 68453
Summary: graphite ICE: segfault
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: Joost.VandeVondele at mat dot ethz.ch
Target Milestone: ---
current trunk (r230637) crashes with
> cat bug.f90
MODULE dbcsr_geev
INTEGER, PARAMETER :: real_8=8
CONTAINS
SUBROUTINE dbcsr_dgeev(jobvl,jobvr,matrix,ndim,evals,revec,levec)
CHARACTER(1) :: jobvl, jobvr
REAL(real_8), DIMENSION(:, :) :: matrix
INTEGER :: ndim
COMPLEX(real_8), DIMENSION(:) :: evals
COMPLEX(real_8), DIMENSION(:, :) :: revec, levec
INTEGER :: i, info, lwork
REAL(real_8) :: norm, tmp_array(ndim,ndim), &
work(20*ndim)
REAL(real_8), DIMENSION(ndim) :: eval1, eval2
REAL(real_8), DIMENSION(ndim, ndim) :: evec_l, evec_r
DO WHILE (i.le.ndim)
IF(ABS(eval2(i)).LT.EPSILON(REAL(0.0,real_8)))THEN
norm=SQRT(SUM(evec_r(:,i)**2.0_real_8)+SUM(evec_r(:,i+1)**2.0_real_8))
revec(:,i)=CMPLX(evec_r(:,i),evec_r(:,i+1),real_8)/norm
END IF
END DO
END SUBROUTINE dbcsr_dgeev
END MODULE dbcsr_geev
> gfortran -c -O2 -floop-nest-optimize bug.f90
bug.f90:4:0:
SUBROUTINE dbcsr_dgeev(jobvl,jobvr,matrix,ndim,evals,revec,levec)
internal compiler error: Segmentation fault
0xb5c56f crash_signal
../../gcc/gcc/toplev.c:334
0xbaf347 ssa_default_def(function*, tree_node*)
../../gcc/gcc/tree-dfa.c:305
0xbb1d88 get_or_create_ssa_default_def(function*, tree_node*)
../../gcc/gcc/tree-dfa.c:357
0xbe8ce3 get_reaching_def
../../gcc/gcc/tree-into-ssa.c:1168
0xbe8ce3 get_reaching_def
../../gcc/gcc/tree-into-ssa.c:1155
0xbea968 rewrite_update_phi_arguments
../../gcc/gcc/tree-into-ssa.c:2015
0xbea968 rewrite_update_dom_walker::before_dom_children(basic_block_def*)
../../gcc/gcc/tree-into-ssa.c:2135
0xbea968 rewrite_update_dom_walker::before_dom_children(basic_block_def*)
../../gcc/gcc/tree-into-ssa.c:2068
0x124aeda dom_walker::walk(basic_block_def*)
../../gcc/gcc/domwalk.c:176
0xbe7715 rewrite_blocks
../../gcc/gcc/tree-into-ssa.c:2190
0xbee94e update_ssa(unsigned int)
../../gcc/gcc/tree-into-ssa.c:3351
0x1274bb1
translate_isl_ast_to_gimple::translate_isl_ast_node_user(isl_ast_node*,
edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/gcc/graphite-isl-ast-to-gimple.c:1026
0x1275505 translate_isl_ast_to_gimple::translate_isl_ast_node_block(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/gcc/graphite-isl-ast-to-gimple.c:1051
0x1275505 translate_isl_ast_to_gimple::translate_isl_ast_node_block(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/gcc/graphite-isl-ast-to-gimple.c:1051
0x1275505 translate_isl_ast_to_gimple::translate_isl_ast_node_block(loop*,
isl_ast_node*, edge_def*, std::map<isl_id*, tree_node*, std::less<isl_id*>,
std::allocator<std::pair<isl_id* const, tree_node*> > >&)
../../gcc/gcc/graphite-isl-ast-to-gimple.c:1051
0x1274f7a graphite_regenerate_ast_isl(scop*)
../../gcc/gcc/graphite-isl-ast-to-gimple.c:2999
0x126d690 graphite_transform_loops()
../../gcc/gcc/graphite.c:343
0x126db60 graphite_transforms
../../gcc/gcc/graphite.c:371
0x126db60 execute
../../gcc/gcc/graphite.c:448
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
