https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104445
Bug ID: 104445
Summary: [12 Regression] ICE in vect_create_partial_epilog, at
tree-vect-loop.cc:5098
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Changed between 20210711 and 20210718, at -O3 or -Ofast :
$ cat z1.c
signed char a;
signed char f (int i, int j)
{
signed char c;
while (i != 0)
{
a ^= j;
++c;
++i;
}
return c;
}
$ gcc-12-20220206 -c z1.c -m32 -O3 -mavx -mno-mmx
during GIMPLE pass: vect
z1.c: In function 'f':
z1.c:2:13: internal compiler error: in vect_create_partial_epilog, at
tree-vect-loop.cc:5098
2 | signed char f (int i, int j)
| ^
0xe32e69 vect_create_partial_epilog
../../gcc/tree-vect-loop.cc:5095
0xe3bd5f vect_transform_cycle_phi(_loop_vec_info*, _stmt_vec_info*, gimple**,
_slp_tree*, _slp_instance*)
../../gcc/tree-vect-loop.cc:7795
0x190fcad vect_transform_stmt(vec_info*, _stmt_vec_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*)
../../gcc/tree-vect-stmts.cc:11276
0xe4b65f vect_transform_loop(_loop_vec_info*, gimple*)
../../gcc/tree-vect-loop.cc:9799
0xe7d565 vect_transform_loops
../../gcc/tree-vectorizer.cc:1004
0xe7d713 vect_transform_loops
../../gcc/tree-vectorizer.cc:1022
0xe7db86 try_vectorize_loop_1
../../gcc/tree-vectorizer.cc:1133
0xe7db86 try_vectorize_loop
../../gcc/tree-vectorizer.cc:1164
0xe7e0c4 execute
../../gcc/tree-vectorizer.cc:1278
