https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108855
Bug ID: 108855
Summary: [13 Regression] ICE in eliminate_unnecessary_stmts, at
tree-ssa-dce.cc:1518
Product: gcc
Version: 13.0
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 13.0.1 20230219 snapshot (g:b9c83e7789f7eec9871e370739baa55fd70be4cf) ICEs
when compiling the following testcase w/ -O1:
int m;
int
undefined (int);
__attribute__ ((pure, returns_twice)) int
bar (void)
{
m = 1;
while (m)
m = 2;
return m;
}
int
foo (void)
{
return undefined (bar ());
}
% gcc-13 -O1 -c gl1ueszy.c
during GIMPLE pass: dce
gl1ueszy.c: In function 'foo':
gl1ueszy.c:17:1: internal compiler error: in eliminate_unnecessary_stmts, at
tree-ssa-dce.cc:1518
17 | foo (void)
| ^~~
0x77557c eliminate_unnecessary_stmts
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230219/work/gcc-13-20230219/gcc/tree-ssa-dce.cc:1518
0x77557c perform_tree_ssa_dce
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230219/work/gcc-13-20230219/gcc/tree-ssa-dce.cc:1951
0x102b6da tree_ssa_dce
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230219/work/gcc-13-20230219/gcc/tree-ssa-dce.cc:1986
0x102b6da execute
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230219/work/gcc-13-20230219/gcc/tree-ssa-dce.cc:2027
