[Bug c++/88331] New: ICE in rtl_verify_bb_layout, at cfgrtl.c:2987

["mateuszb at poczta dot onet.pl" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88331

            Bug ID: 88331
           Summary: ICE in rtl_verify_bb_layout, at cfgrtl.c:2987
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mateuszb at poczta dot onet.pl
  Target Milestone: ---

When I compile x265 with option
export CXXFLAGS="-march=core-avx2"
with gcc 9.0 for mingw-w64 target:
g++ -v
Reading specs from
f:/msys/m64-900/bin/../lib/gcc/x86_64-w64-mingw32/9.0.0/specs
COLLECT_GCC=f:\msys\m64-900\bin\g++.exe
COLLECT_LTO_WRAPPER=f:/msys/m64-900/bin/../libexec/gcc/x86_64-w64-mingw32/9.0.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: /home/ma/m/source/gcc-9/configure --host=x86_64-w64-mingw32
--target=x86_64-w64-mingw32 --disable-nls --enable-languages=c,c++,objc,obj-c++
--with-gmp=/home/ma/m/build/for_target --with-mpfr=/home/ma/m/build/for_target
--with-mpc=/home/ma/m/build/for_target --with-isl=/home/ma/m/build/for_target
--enable-twoprocess --disable-libstdcxx-pch --disable-win32-registry
--disable-shared --enable-fully-dynamic-string --prefix=/home/ma/m/target
--with-sysroot=/home/ma/m/target
Thread model: win32
gcc version 9.0.0 20181203 (experimental) (GCC)

I get errors (it depend of what module x265 compile first):
f:/x265/source/encoder/slicetype.cpp: In member function 'void
x265_12bit::Lookahead::cuTree(x265_12bit::Lowres**, int, bool)':
f:/x265/source/encoder/slicetype.cpp:2086:1: error: insn outside basic block
 2086 | }
      | ^
(insn 8402 7720 8403 (parallel [
            (set (reg:DI 5536)
                (plus:DI (reg/f:DI 19 frame)
                    (const_int -6896 [0xffffffffffffe510])))
            (clobber (reg:CC 17 flags))
        ]) 191 {*adddi_1}
     (nil))
during RTL pass: reload
f:/x265/source/encoder/slicetype.cpp:2086:1: internal compiler error: in
rtl_verify_bb_layout, at cfgrtl.c:2987
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.

*** OR ***

f:/x265/source/common/pixel.cpp: In function 'int {anonymous}::_sa8d_8x8(const
pixel*, intptr_t, const pixel*, intptr_t)':
f:/x265/source/common/pixel.cpp:325:1: error: insn outside basic block
  325 | }
      | ^
(insn 270 239 271 (parallel [
            (set (reg:DI 425)
                (plus:DI (reg/f:DI 19 frame)
                    (const_int -304 [0xfffffffffffffed0])))
            (clobber (reg:CC 17 flags))
        ]) -1
     (nil))
during RTL pass: reload
f:/x265/source/common/pixel.cpp:325:1: internal compiler error: in
rtl_verify_bb_layout, at cfgrtl.c:2987
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.

gcc 9.0 snapshot 20181118 works OK, next snapshots works wrong.
If this error is not reproducible/obvious, I could try to make preprocessed
source. Anyway the option "-march=core-avx2" is important for the bug.