[Bug c++/88949] New: ICE in expand_expr_real_1, at expr.c:10001 with -fopenmp

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88949

            Bug ID: 88949
           Summary: ICE in expand_expr_real_1, at expr.c:10001 with
                    -fopenmp
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---

Probably quite old issue:

$ cat parallel_firstprivate_codegen.cpp
struct a {
  int b;
  a(int) {
#pragma omp parallel firstprivate(b)
    --b;
  }
};

int c;
int main() { a d(c); }

$ g++ parallel_firstprivate_codegen.cpp -fopenmp
during RTL pass: expand
parallel_firstprivate_codegen.cpp: In constructor ‘a::a(int)’:
parallel_firstprivate_codegen.cpp:4:37: internal compiler error: in
expand_expr_real_1, at expr.c:10001
 #pragma omp parallel firstprivate(b)
                                     ^
0x7ffff6996fea __libc_start_main
        ../csu/libc-start.c:308


Reduced from:
https://github.com/llvm-mirror/clang/blob/master/test/OpenMP/parallel_firstprivate_codegen.cpp