https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125290
Bug ID: 125290
Summary: [16/17 Regression] ICE at -O3 during GIMPLE pass:
ifcvt
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: xxs_chy at outlook dot com
Target Milestone: ---
Reproducer: https://godbolt.org/z/619o499cM
Testcase:
#include <stdint.h>
int64_t g21;
_Bool g31, f14f16_c12;
void f14f16()
{
int16_t v7;
int64_t v9;
int64_t v13;
if (g31)
{
g21 = 0;
switch (v7)
{
case 4:
case 30608: break;
default: __builtin_unreachable();
}
}
else
{
lbl_bf2:
v9 = g21;
}
v13 = v9;
switch (v13)
{
case 80592981658379000:
case 2: goto lbl_sw12;
default:
if (f14f16_c12)
goto lbl_bf2;
else
return;
}
lbl_sw12:
__builtin_unreachable();
}
Dump at -O3:
during GIMPLE pass: ifcvt
<source>: In function 'f14f16':
<source>:4:6: internal compiler error: in gimple_switch_label, at gimple.h:4972
4 | void f14f16()
| ^~~~~~
0x2632b88 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x26277cb internal_error(char const*, ...)
???:0
0xa29faa fancy_abort(char const*, int, char const*)
???:0
0x127a241 tree_if_conversion(loop*, vec<gimple*, va_heap, vl_ptr>*)
???:0
