https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97396
Bug ID: 97396
Summary: [11 Regression] ICE: Segmentation fault (in
bounds_of_var_in_loop)
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-alpha20201011 snapshot (g:4eaf96c56c1c97b11af42a4caaa12b37870308d7)
ICEs when compiling the following testcase w/ -m32 -O1 -ftree-vrp:
unsigned int
po (char *os, unsigned int al)
{
for (;;)
{
int qx = 0;
while (al < 1)
{
char *cw;
cw = os + qx;
if (cw)
return al + qx;
qx += sizeof *cw;
}
}
}
% gcc-11.0.0 -m32 -O1 -ftree-vrp -c c5dvzahu.c
during GIMPLE pass: evrp
c5dvzahu.c: In function 'po':
c5dvzahu.c:19:1: internal compiler error: Segmentation fault
19 | }
| ^
0xdb3b3f crash_signal
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/toplev.c:330
0x10e73a3 bounds_of_var_in_loop(tree_node**, tree_node**, range_query*, loop*,
gimple*, tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/vr-values.c:1836
0x18aaa19 gimple_ranger::range_of_ssa_name_with_loop_info(irange&, tree_node*,
loop*, gphi*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-range.cc:1138
0x18aad73 gimple_ranger::range_of_phi(irange&, gphi*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-range.cc:495
0x18ab0fd gimple_ranger::calc_stmt(irange&, gimple*, tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-range.cc:371
0x18ab30f gimple_ranger::range_of_stmt(irange&, gimple*, tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-range.cc:986
0x18a7918 gimple_ranger::range_of_expr(irange&, tree_node*, gimple*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-range.cc:877
0x109d6fd range_query::value_of_expr(tree_node*, gimple*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/value-query.cc:85
0x1740211 hybrid_folder::value_of_expr(tree_node*, gimple*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-ssa-evrp.c:235
0xf529a6 substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/tree-ssa-propagate.c:1072
0x1715ca7 dom_walker::walk(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/domwalk.c:309
0xf51f77 substitute_and_fold_engine::substitute_and_fold(basic_block_def*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/tree-ssa-propagate.c:1283
0x173fe8e execute_early_vrp
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201011/work/gcc-11-20201011/gcc/gimple-ssa-evrp.c:340
