https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81546
Bug ID: 81546
Summary: ICE at -O3 during GIMPLE pass dom
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: babokin at gmail dot com
Target Milestone: ---
Created attachment 41823
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41823&action=edit
reduced and original test cases
gcc trunk rev250367, x86_64
Test case is reduced from much larger code. During reduction blame phase has
changed from slsr to dom, but looks like it's still the same problem.
Another interesting observation, during test case reduction one of intermediate
results triggered too aggressive memory allocation (more that 128Gb), this was
reported separately in #81488
> time g++ -O0 -c fff.cpp
real 0m0.048s
user 0m0.035s
sys 0m0.012s
> time g++ -O2 -c fff.cpp
real 0m0.085s
user 0m0.075s
sys 0m0.010s
> time g++ -O3 -c fff.cpp
IMM ERROR : (use_p : tree - 0x7f63cea18b68:0x7f63cea18b88)_5
for SSA_NAME: _5 in statement:
if (_5 != 0)
during GIMPLE pass: dom
fff.cpp: In function ‘void foo()’:
fff.cpp:30:6: internal compiler error: verify_ssa failed
void foo() {
^~~
0x10f9043 verify_ssa(bool, bool)
../../gcc_svn_intel/gcc/tree-ssa.c:1186
0xe9088d execute_function_todo
../../gcc_svn_intel/gcc/passes.c:1996
0xe915ee execute_todo
../../gcc_svn_intel/gcc/passes.c:2043
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
real 2m12.280s
user 2m6.464s
sys 0m5.786s
