https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84739
Bug ID: 84739
Summary: [6/7/8 Regression] ICE in get_value_for_expr, at
tree-ssa-ccp.c:649
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Affects versions 6/7/8 at -O[s23] :
$ cat z1.c
static void baz (void) __attribute__((weakref("bar")));
int
foo (int x, int y)
{
if (x)
y = 0;
if (y)
goto L1;
y = 0;
L1:
return y;
}
void
bar (int x, int y)
{
y = foo (x, y);
if (y != 0)
baz ();
}
$ gcc-5 -O2 -c z1.c
$
$ gcc-8-20180304 -O2 -c z1.c
z1.c:1:13: warning: 'baz' alias between functions of incompatible types
'void(void)' and 'void(int, int)' [-Wattribute-alias]
static void baz (void) __attribute__((weakref("bar")));
^~~
z1.c:14:1: note: aliased declaration here
bar (int x, int y)
^~~
during GIMPLE pass: ccp
z1.c: In function 'bar':
z1.c:14:1: internal compiler error: Segmentation fault
0xaed10f crash_signal
../../gcc/toplev.c:325
0xbc5401 get_value_for_expr
../../gcc/tree-ssa-ccp.c:649
0xbc7ea8 ccp_propagate::visit_phi(gphi*)
../../gcc/tree-ssa-ccp.c:1133
0xc42778 ssa_propagation_engine::simulate_stmt(gimple*)
../../gcc/tree-ssa-propagate.c:233
0xc42992 ssa_propagation_engine::simulate_block(basic_block_def*)
../../gcc/tree-ssa-propagate.c:359
0xc43669 ssa_propagation_engine::ssa_propagate()
../../gcc/tree-ssa-propagate.c:800
0xbc4697 do_ssa_ccp
../../gcc/tree-ssa-ccp.c:2474
0xbc4697 execute
../../gcc/tree-ssa-ccp.c:2518
