https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96748
Bug ID: 96748
Summary: ICE in get_default_value, at tree-ssa-ccp.c:311
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: manuel.lauss at googlemail dot com
Target Milestone: ---
The attached unreduced testcase, isolated from wireshark-3.2.6, ICEs in
get_default_value, at tree-ssa-ccp.c:311, with current 10.2.1 branch.
It goes away with -O1 or when dropping -fno-strict-overflow at -O2 or higher.
# gcc -fno-strict-overflow -O2 -c packet-ieee80211.i
during GIMPLE pass: ccp
/tmp-ram/portage/net-analyzer/wireshark-3.2.6/work/wireshark-3.2.6/epan/dissectors/packet-ieee80211.c:
In function 'dissect_quiet_time_period.constprop':
/tmp-ram/portage/net-analyzer/wireshark-3.2.6/work/wireshark-3.2.6/epan/dissectors/packet-ieee80211.c:12484:1:
internal compiler error: in get_default_value, at tree-ssa-ccp.c:311
12484 | dissect_quiet_time_period(tvbuff_t *tvb, packet_info *pinfo _U_,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
0x7fcac1d5adc9 __libc_start_main
../csu/libc-start.c:314
Please submit a full bug report,
with preprocessed source if appropriate.
# gcc --version
gcc (Gentoo 10.2.1 p1) 10.2.1
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
