https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71247
Bug ID: 71247
Summary: [6 Regression] ICE in expand_expr_real_1, at
expr.c:9651
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: anlauf at gmx dot de
Target Milestone: ---
The following code ICEs with 6.0, but not with 5.0 or earlier.
The ICE disappears with -fno-realloc-lhs.
Don't know if it has been already been fixed after the initial 6 release.
% cat gfcbug135.f90
MODULE gfcbug135
implicit none
integer, parameter :: LEN=256
character(len=LEN), allocatable :: lines(:)
integer :: n
contains
subroutine foo1 ()
integer :: i, j
j = n
do i = n, 1, -1
lines(j) = lines(i) ! Comment out to avoid ICE
j = j - 1
end do
end subroutine foo1
!-
subroutine foo2 ()
integer :: i,j
j = n + 3
do i = n,4,-1
lines(j) = lines(i) ! Comment out to avoid ICE
j = j - 1
end do
end subroutine foo2
end module gfcbug135
% gfortran6 -c gfcbug135.f90
gfcbug135.f90:11:0:
lines(j) = lines(i) ! Comment out to avoid ICE
internal compiler error: in expand_expr_real_1, at expr.c:9651
0x8dafcb expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-6-20160410/gcc/expr.c:9645
0x8efc4e expand_expr
../../gcc-6-20160410/gcc/expr.h:256
0x8efc4e expand_expr_addr_expr_1
../../gcc-6-20160410/gcc/expr.c:7672
0x8d71b6 expand_expr_addr_expr
../../gcc-6-20160410/gcc/expr.c:7793
0x8d71b6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-6-20160410/gcc/expr.c:10825
0x8e34a5 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../gcc-6-20160410/gcc/expr.c:5406
0x8e4e98 expand_assignment(tree_node*, tree_node*, bool)
../../gcc-6-20160410/gcc/expr.c:5175
0x7d899e expand_gimple_stmt_1
../../gcc-6-20160410/gcc/cfgexpand.c:3618
0x7d899e expand_gimple_stmt
../../gcc-6-20160410/gcc/cfgexpand.c:3714
0x7dae0e expand_gimple_basic_block
../../gcc-6-20160410/gcc/cfgexpand.c:5720
0x7e0f46 execute
../../gcc-6-20160410/gcc/cfgexpand.c:6335
Please submit a full bug report,
with preprocessed source if appropriate.
