[Bug c/114885] New: RISC-V: ICE of unrecog insn when graphite for both the c/c++ and fortran

["pan2.li at intel dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114885

            Bug ID: 114885
           Summary: RISC-V: ICE of unrecog insn when graphite for both the
                    c/c++ and fortran
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pan2.li at intel dot com
  Target Milestone: ---

When some graphite (require the isl build for gcc) tests, there are sorts of
ICE that cannot recog the insn.

FAIL: gcc.dg/graphite/pr111878.c (internal compiler error: in 
extract_insn, at recog.cc:2812)

FAIL: gfortran.dg/graphite/id-27.f90   -O  (internal compiler error: in 
extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/id-27.f90   -O  (test for excess errors)
FAIL: gfortran.dg/graphite/pr14741.f90   -O  (internal compiler error: 
in extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/pr14741.f90   -O  (test for excess errors)
FAIL: gfortran.dg/graphite/pr29581.f90   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  (internal 
compiler error: in extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/pr29581.f90   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  (test for 
excess errors)
FAIL: gfortran.dg/graphite/pr29581.f90   -O3 -g  (internal compiler 
error: in extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/pr29581.f90   -O3 -g  (test for excess errors)
FAIL: gfortran.dg/graphite/pr29832.f90   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  (internal 
compiler error: in extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/pr29832.f90   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  (test for 
excess errors)
FAIL: gfortran.dg/graphite/pr29832.f90   -O3 -g  (internal compiler 
error: in extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/pr29832.f90   -O3 -g  (test for excess errors)
FAIL: gfortran.dg/graphite/vect-pr40979.f90   -O  (internal compiler 
error: in extract_insn, at recog.cc:2812)
FAIL: gfortran.dg/graphite/vect-pr40979.f90   -O  (test for excess errors)

Reproduce step(s):

1. download isl-0.24, let isl -> /some-where/riscv-gnu-toolchain/gcc/isl-0.24

2. mkdir __BUILD__ && cd __BUILD__ && ../configure \
  --target=riscv64-unknown-elf \
  --prefix=${INSTALL_DIR} \
  --disable-shared \
  --enable-threads \
  --enable-tls \
  --enable-languages=c,c++,fortran \
  --with-system-zlib \
  --with-newlib \
  --disable-libmudflap \
  --disable-libssp \
  --disable-libquadmath \
  --disable-libgomp \
  --enable-nls \
  --disable-tm-clone-registry \
  --src=`pwd`/../ \
  --with-abi=lp64d \
  --with-arch=rv64gcv \
  --with-tune=rocket \
  --with-isa-spec=20191213 \
  CFLAGS_FOR_BUILD="-O0 -g" \
  CXXFLAGS_FOR_BUILD="-O0 -g" \
  CFLAGS_FOR_TARGET="-O0  -g" \
  CXXFLAGS_FOR_TARGET="-O0 -g" \
  BOOT_CFLAGS="-O0 -g" \
  CFLAGS="-O0 -g" \
  CXXFLAGS="-O0 -g" \
  GM2FLAGS_FOR_TARGET="-O0 -g" \
  GOCFLAGS_FOR_TARGET="-O0 -g" \
  GDCFLAGS_FOR_TARGET="-O0 -g"
make -j $(nproc) all-gcc && make install-gcc

3. ../__RISC-V_INSTALL___RV64/bin/riscv64-unknown-elf-gcc
gcc/testsuite/gcc.dg/graphite/pr111878.c -O3 -fgraphite-identity
-fsave-optimization-record -march=rv64gcv -mabi=lp64d -c -S -o -