[Bug target/113217] New: [14 Regression][aarch64] ICE in rtl_verify_bb_insns, at cfgrtl.cc:2796 since r14-6605-gc0911c6b357ba9

["mjires at suse dot cz" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113217

            Bug ID: 113217
           Summary: [14 Regression][aarch64] ICE in rtl_verify_bb_insns,
                    at cfgrtl.cc:2796 since r14-6605-gc0911c6b357ba9
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mjires at suse dot cz
                CC: acoplan at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

Compiling reduced testcase g++.dg/vect/pr45470-b.cc results in ICE since
r14-6605-gc0911c6b357ba9.

$ cat pr45470-b.cc
struct _Vector_base {
  int _M_end_of_storage;
};
struct vector : _Vector_base {
  vector() : _Vector_base() {}
  ~vector();
};
struct LoadGraph {
  LoadGraph();
  vector colors;
  vector data_block;
};
LoadGraph::LoadGraph() {}


$ aarch64-linux-gnu-g++ pr45470-b.cc -fnon-call-exceptions
-fvar-tracking-assignments-toggle -Ofast
pr45470-b.cc: In constructor ‘LoadGraph::LoadGraph()’:
pr45470-b.cc:13:25: error: in basic block 2:
   13 | LoadGraph::LoadGraph() {}
      |                         ^
pr45470-b.cc:13:25: error: flow control insn inside a basic block
(insn 7 6 8 2 (set (mem:V2x4QI (reg/f:DI 103 [ this ]) [0 +0 S8 A32])
        (unspec:V2x4QI [
                (const_int 0 [0]) repeated x2
            ] UNSPEC_STP)) "pr45470-b.cc":5:27 90 {*store_pair_4}
     (expr_list:REG_EH_REGION (const_int 1 [0x1])
        (nil)))
during RTL pass: ldp_fusion
pr45470-b.cc:13:25: internal compiler error: in rtl_verify_bb_insns, at
cfgrtl.cc:2802
0x1b09b2e _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/mjires/git/GCC/master/gcc/rtl-error.cc:108
0x148d06f rtl_verify_bb_insns
        /home/mjires/git/GCC/master/gcc/cfgrtl.cc:2802
0x148d337 rtl_verify_flow_info_1
        /home/mjires/git/GCC/master/gcc/cfgrtl.cc:2889
0x148da96 rtl_verify_flow_info
        /home/mjires/git/GCC/master/gcc/cfgrtl.cc:3134
0x147202e verify_flow_info()
        /home/mjires/git/GCC/master/gcc/cfghooks.cc:283
0x1a37384 execute_function_todo
        /home/mjires/git/GCC/master/gcc/passes.cc:2100
0x1a35faa do_per_function
        /home/mjires/git/GCC/master/gcc/passes.cc:1687
0x1a37509 execute_todo
        /home/mjires/git/GCC/master/gcc/passes.cc:2142
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.


$ aarch64-linux-gnu-g++ -v
Using built-in specs.
COLLECT_GCC=aarch64-linux-gnu-g++
COLLECT_LTO_WRAPPER=/home/mjires/built/master/libexec/gcc/aarch64-linux-gnu/14.0.0/lto-wrapper
Target: aarch64-linux-gnu
Configured with: /home/mjires/git/GCC/master/configure
--prefix=/home/mjires/built/master --target=aarch64-linux-gnu
--disable-bootstrap --enable-languages=c,c++,fortran --disable-multilib
--disable-libsanitizer --enable-checking : (reconfigured)
/home/mjires/git/GCC/master/configure --prefix=/home/mjires/built/master
--target=aarch64-linux-gnu --disable-bootstrap --enable-languages=c,c++,fortran
--disable-multilib --disable-libsanitizer --enable-checking
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20240103 (experimental) (GCC)