https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96967
Bug ID: 96967
Summary: [11 Regression] ICE in decompose, at wide-int.h:984
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-11.0.0-alpha20200906 snapshot (g:23f8b90c401842afcbaa50a7fd3c2f37818f4396)
ICEs when compiling the following testcase w/ -O2 -fshort-enums:
enum re {
o3,
};
int
uj (int mq, enum re dn)
{
enum re nr = mq;
switch (nr)
{
case 4:
if (dn == 0)
goto wdev_inactive_unlock;
break;
default:
break;
}
switch (nr)
{
case 0:
case 4:
return 0;
default:
break;
}
wdev_inactive_unlock:
return 1;
}
% gcc-11.0.0 -O2 -fshort-enums -c cvihn9ij.c
during GIMPLE pass: vrp
cvihn9ij.c: In function 'uj':
cvihn9ij.c:6:1: internal compiler error: in decompose, at wide-int.h:984
6 | uj (int mq, enum re dn)
| ^~
0x70e4c0 wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false> >
>::decompose(long*, unsigned int, generic_wide_int<wide_int_ref_storage<false,
false> > const&)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/wide-int.h:984
0x1070b85 wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false> >
>::decompose(long*, unsigned int, generic_wide_int<wide_int_ref_storage<false,
false> > const&)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/wide-int.h:1931
0x1070b85 wide_int_ref_storage<false,
false>::wide_int_ref_storage<generic_wide_int<wide_int_ref_storage<false,
false> > >(generic_wide_int<wide_int_ref_storage<false, false> > const&,
unsigned int)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/wide-int.h:1034
0x1070b85 generic_wide_int<wide_int_ref_storage<false, false>
>::generic_wide_int<generic_wide_int<wide_int_ref_storage<false, false> >
>(generic_wide_int<wide_int_ref_storage<false, false> > const&, unsigned int)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/wide-int.h:790
0x1070b85 bool wi::ltu_p<generic_wide_int<wide_int_ref_storage<false, false> >,
generic_wide_int<wide_int_ref_storage<false, false> >
>(generic_wide_int<wide_int_ref_storage<false, false> > const&,
generic_wide_int<wide_int_ref_storage<false, false> > const&)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/wide-int.h:1935
0x106ed94 bool wi::lt_p<generic_wide_int<wide_int_ref_storage<false, false> >,
generic_wide_int<wide_int_ref_storage<false, false> >
>(generic_wide_int<wide_int_ref_storage<false, false> > const&,
generic_wide_int<wide_int_ref_storage<false, false> > const&, signop)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/wide-int.h:1961
0x106ed94 irange::irange_intersect(irange const&)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/value-range.cc:1701
0x106f049 irange::intersect(irange const*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/value-range.cc:1539
0x1029e02 find_case_label_range(gswitch*, irange const*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-vrp.c:3831
0xf88a63 simplify_control_stmt_condition
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-ssa-threadedge.c:554
0xf89840 thread_through_normal_block
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-ssa-threadedge.c:1101
0xf8b50d thread_through_normal_block
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-ssa-threadedge.c:1302
0xf8b50d thread_across_edge
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-ssa-threadedge.c:1259
0xf8b7cf thread_outgoing_edges(basic_block_def*, gcond*, const_and_copies*,
avail_exprs_stack*, evrp_range_analyzer*, tree_node* (*)(gimple*, gimple*,
avail_exprs_stack*, basic_block_def*))
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-ssa-threadedge.c:1463
0x1024748 vrp_dom_walker::after_dom_children(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-vrp.c:4286
0x16d8687 dom_walker::walk(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/domwalk.c:352
0x10337f1 identify_jump_threads
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-vrp.c:4341
0x10337f1 execute_vrp
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200906/work/gcc-11-20200906/gcc/tree-vrp.c:4480
