https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124555
Bug ID: 124555
Summary: [14/15/16 regression] ICE when building ffmpeg-8.0.1
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
Originally reported downstream in Gentoo at https://bugs.gentoo.org/971288.
Fails w/ `gcc -c foo.i -O2 -fno-strict-overflow`.
```
int vsad8_c_y;
char *vsad8_c_s1, *vsad8_c_s2;
long vsad8_c_stride;
int vsad8_c() {
int score, x;
for (; vsad8_c_y; vsad8_c_y++) {
x = 0;
for (; x < 8; x++)
score += vsad8_c_s1[x] - vsad8_c_s2[x] - vsad8_c_s1[x + vsad8_c_stride] +
vsad8_c_s2[x + vsad8_c_stride] >=
0
? vsad8_c_s1[x] - vsad8_c_s2[x] -
vsad8_c_s1[x + vsad8_c_stride] +
vsad8_c_s2[x + vsad8_c_stride]
: -(vsad8_c_s1[x] - vsad8_c_s2[x] -
vsad8_c_s1[x + vsad8_c_stride] +
vsad8_c_s2[x + vsad8_c_stride]);
vsad8_c_s1 += vsad8_c_stride;
vsad8_c_s2 += vsad8_c_stride;
}
return score;
```
```
// during RTL pass: expand
// libavcodec/me_cmp.c: In function 'vsad8_c':
// libavcodec/me_cmp.c:882:19: internal compiler error: in prepare_cmp_insn, at
optabs.cc:4638
// 882 | score += FFABS(s1[x] - s2[x] - s1[x + stride] + s2[x +
stride]); \
// libavcodec/me_cmp.c:889:1: note: in expansion of macro 'VSAD'
// 889 | VSAD(8)
// | ^~~~
// 0x55555702f98d internal_error(char const*, ...)
// ???:0
// 0x55555586b78e fancy_abort(char const*, int, char const*)
// ???:0
// 0x555555d736cf emit_cmp_and_jump_insns(rtx_def*, rtx_def*, rtx_code,
rtx_def*, machine_mode, int, tree_node*, rtx_def*, profile_probability)
// ???:0
// 0x555555a4ef43 do_compare_rtx_and_jump(rtx_def*, rtx_def*, rtx_code, int,
tree_node*, machine_mode, rtx_def*, rtx_code_label*, rtx_code_label*,
profile_probability)
// ???:0
// 0x555555a50701 do_compare_rtx_and_jump(rtx_def*, rtx_def*, rtx_code, int,
machine_mode, rtx_def*, rtx_code_label*, rtx_code_label*, profile_probability)
// ???:0
// 0x555555d8236e expand_abs(machine_mode, rtx_def*, rtx_def*, int, int)
// ???:0
// 0x555555af7c5a expand_expr_real_gassign(gassign*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
// ???:0
// 0x555555af5b4e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
// ???:0
// 0x555555af7b25 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
// ???:0
// 0x555555aeff6b expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
// ???:0
// 0x555555af7c5a expand_expr_real_gassign(gassign*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
// ???:0
// 0x555555af5b4e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
// ???:0
// 0x555555af7b25 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
// ???:0
// 0x555555aeff6b expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
// ???:0
// 0x555555af7c5a expand_expr_real_gassign(gassign*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
// ???:0
// Please submit a full bug report, with preprocessed source.
// Please include the complete backtrace with any bug report.
// See <https://bugs.gentoo.org/> for instructions.
```
```
```
