https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80707
Bug ID: 80707
Summary: [8 Regression] r247844 causes error: extra outgoing
edge
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
Since r247844:
trippels@gcc2-power8 ~ % cat tzfmt.ii
struct A {
int m_fn1(int &) const;
};
int A::m_fn1(int &p1) const {
int a[6];
int b = 0;
for (int i;; i++) {
if (a[i])
break;
b++;
}
while (b) {
int c;
switch (b) {
case 1:
c = 0;
break;
case 5:
c = a[0];
}
if (c)
p1 = 0;
b--;
}
}
trippels@gcc2-power8 ~ % g++ -c -O3 tzfmt.ii
tzfmt.ii: In member function ‘int A::m_fn1(int&) const’:
tzfmt.ii:4:5: error: extra outgoing edge 43->33
int A::m_fn1(int &p1) const {
^
tzfmt.ii:4:5: error: extra outgoing edge 44->33
tzfmt.ii:4:5: internal compiler error: verify_flow_info failed
0x105d8db3 verify_flow_info()
../../gcc/gcc/cfghooks.c:260
0x10bb613b checking_verify_flow_info
../../gcc/gcc/cfghooks.h:198
0x10bb613b cleanup_tree_cfg_noloop
../../gcc/gcc/tree-cfgcleanup.c:837
0x10bb613b cleanup_tree_cfg()
../../gcc/gcc/tree-cfgcleanup.c:883
0x10a3c147 execute_function_todo
../../gcc/gcc/passes.c:1921
0x10a3ced3 do_per_function
../../gcc/gcc/passes.c:1652
0x10a3d153 execute_todo
../../gcc/gcc/passes.c:2018
