[Bug tree-optimization/110332] [14 regression] ICE in dominated_by_p when building LLVM with -O3

["slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110332

Sergei Trofimovich <slyfox at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |slyfox at gcc dot gnu.org

--- Comment #6 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
I think I see the same ICE on llvm-12 and r14-2009-g864c6471bdc6cd:

cvise produced this thing:

// $ cat a.cpp.cpp
struct SlotIndex { int lie; };
SlotIndex si7, si8;

unsigned u9, u6;
bool b3, b4;
unsigned &value() {
  return b4 ? u6 : u9;
}
void transferValues() {
  unsigned RegIdx;
  SlotIndex End;
  RegIdx = value();
  End = b3 ? si7 : si8;
}

$ g++ -O3  -c a.cpp.cpp -o a.o
during GIMPLE pass: phiprop
a.cpp.cpp: In function 'void transferValues()':
a.cpp.cpp:14:1: internal compiler error: Segmentation fault
   14 | }
      | ^
0x1d74824 diagnostic_impl(rich_location*, diagnostic_metadata const*, int, char
const*, __va_list_tag (*) [1], diagnostic_t)
        ???:0
0x1d74d97 internal_error(char const*, ...)
        ???:0
0xe9bfdf crash_signal(int)
        ???:0
0xa851da dominated_by_p(cdi_direction, basic_block_def const*, basic_block_def
const*)
        ???:0
0x102096b (anonymous namespace)::pass_phiprop::execute(function*)
        ???:0

$ g++  -v
Using built-in specs.
COLLECT_GCC=/<<NIX>>/gcc-14.0.0/bin/g++
COLLECT_LTO_WRAPPER=/<<NIX>>/gcc-14.0.0/libexec/gcc/x86_64-unknown-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: 
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 99999999 (experimental) (GCC)