https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108783
Bug ID: 108783
Summary: [13 Regression] ICE: verify_flow_info failed (error:
returns_twice call is not first in basic block 3)
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 20230212 snapshot (g:06ca0c9abb260266b688e2c2154c72214bb47076) ICEs
when compiling the following testcase w/ -O1:
int
bar (int x)
{
return x;
}
__attribute__((returns_twice)) int
foo (int x, int y)
{
int a;
a = bar (x);
(void) foo (x, y);
return y && a && a;
}
% gcc-13 -O1 -c ibxb9fcz.c
ibxb9fcz.c: In function 'foo':
ibxb9fcz.c:8:1: error: returns_twice call is not first in basic block 3
8 | foo (int x, int y)
| ^~~
foo (x_9(D), y_12(D));
during GIMPLE pass: reassoc
ibxb9fcz.c:8:1: internal compiler error: verify_flow_info failed
0xa06a6d verify_flow_info()
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230212/work/gcc-13-20230212/gcc/cfghooks.cc:285
0xe0b153 execute_function_todo
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230212/work/gcc-13-20230212/gcc/passes.cc:2103
0xe0b69e execute_todo
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230212/work/gcc-13-20230212/gcc/passes.cc:2145
