https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105769
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.4
Known to work| |10.3.0
Known to fail| |11.3.0, 12.1.0
Summary|program segmentation fault |[11/12/13 Regression]
|with -ftree-vectorize and |program segmentation fault
|nested lambdas |with -ftree-vectorize and
| |nested lambdas
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It segfaults doing an indirect call
#0 0x0000000000000001 in ?? ()
#1 0x0000000000400c9d in std::_Function_base::~_Function_base (
this=<optimized out>, this=<optimized out>)
at
/home/space/rguenther/install/gcc-11.3/include/c++/11.3.0/bits/std_function.h:244
#2 0x00000000004011f1 in std::function<unsigned long (unsigned
long)>::~function() (this=<optimized out>, this=<optimized out>)
at
/home/space/rguenther/install/gcc-11.3/include/c++/11.3.0/bits/std_function.h:334
#3 print_cov_ratio<ab> () at /tmp/t.C:86
#4 main () at /tmp/t.C:122
with -fno-lifetime-dse it works fine. I suspect that either GCC or the
source gets things wrong WRT object lifetime in the maze of lambdas.
It's interesting that with -fsanitize=undefined added we still vectorize
but exactly a single load/store:
t.C:65:3: optimized: basic block part vectorized using 16 byte vectors
and then it still crashes.
0x0000000000401027 <+97>: mov %rbx,%rdi
0x000000000040102a <+100>: call *%rbp
=> 0x000000000040102c <+102>: add $0x8,%rsp
(gdb) p $rbp
$1 = (void *) 0x1
More investigation is needed.
