[Bug middle-end/83718] New: [8 Regression] ICE: Floating point exception in profile_count::apply_scale

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83718

            Bug ID: 83718
           Summary: [8 Regression] ICE: Floating point exception in
                    profile_count::apply_scale
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

seen with r256272, building slic3r on amd64:

$ g++ -c -O2 Print.ii 
during GIMPLE pass: fnsplit
Print.ii: In function 'virtual int*<unnamed class>::d(a, bool)':
Print.ii:138:4: internal compiler error: Floating point exception
 } b;
    ^
0xbe45bf crash_signal
        ../../src/gcc/toplev.c:325
0xc2f89f profile_count::apply_scale(profile_count, profile_count) const
        ../../src/gcc/profile-count.h:76
0xc2f89f copy_edges_for_bb
        ../../src/gcc/tree-inline.c:2231
0xc2f89f copy_cfg_body
        ../../src/gcc/tree-inline.c:2752
0xc2f89f copy_body
        ../../src/gcc/tree-inline.c:2971
0xc32fc1 tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*,
va_gc, vl_embed>*, bool, bitmap_head*, bool, bitmap_head*, basic_block_def*)
        ../../src/gcc/tree-inline.c:6039
0x8cf109 cgraph_node::create_version_clone_with_body(vec<cgraph_edge*, va_heap,
vl_ptr>, vec<ipa_replace_map*, va_gc, vl_embed>*, bitmap_head*, bool,
bitmap_head*, basic_block_def*, char const*)
        ../../src/gcc/cgraphclones.c:984
0x1251619 split_function
        ../../src/gcc/ipa-split.c:1369
0x1251619 execute_split_functions
        ../../src/gcc/ipa-split.c:1896
Please submit a full bug report,
with preprocessed source if appropriate.


$ cat Print.ii
class a {
public:
  int c(const char *);
};
class B {
  virtual int *d(a, bool);
};
bool e, f, g, h, i, j, k, l, m, n, o, p, aa, q, r, s, t, u, v, ab, w, x, y, z,
    ac, ad;
class : B {
  int ae;
  int af;
  int ag;
  int ah;
  int ai;
  int aj;
  int ak;
  int al;
  int am;
  int an;
  int ao;
  int ap;
  int aq;
  int ar;
  int as;
  int at;
  int au;
  int av;
  int aw;
  int ax;
  int ay;
  int az;
  int ba;
  int bb;
  int bc;
  int bd;
  int be;
  int bf;
  int bg;
  int bh;
  int bi;
  int *d(a, bool) {
    if (e)
      return &ae;
    a bj;
    bj.c("");
    if (f)
      return ⁡
    bj.c("");
    if (e)
      return &ag;
    bj.c("");
    if (f)
      return &ah;
    bj.c("");
    if (e)
      return &ai;
    bj.c("");
    if (ad)
      return &aj;
    bj.c("");
    if (ac)
      return &ak;
    bj.c("");
    if (z)
      return &al;
    bj.c("");
    if (y)
      return &am;
    bj.c("");
    if (x)
      return &an;
    bj.c("");
    if (w)
      return &ao;
    bj.c("");
    if (ab)
      return ≈
    bj.c("");
    if (v)
      return &aq;
    bj.c("");
    if (u)
      return &ar;
    bj.c("");
    if (t)
      return &as;
    bj.c("");
    if (s)
      return &at;
    bj.c("");
    if (r)
      return &au;
    bj.c("");
    if (q)
      return &av;
    bj.c("");
    if (aa)
      return &aw;
    bj.c("");
    if (p)
      return &ax;
    bj.c("");
    if (o)
      return &ay;
    bj.c("");
    if (n)
      return &az;
    bj.c("");
    if (m)
      return &ba;
    bj.c("");
    if (l)
      return &bb;
    bj.c("");
    if (k)
      return &bc;
    bj.c("");
    if (j)
      return &bd;
    bj.c("");
    if (i)
      return &be;
    bj.c("");
    if (h)
      return &bf;
    bj.c("");
    if (g)
      return &bg;
    if (f)
      return &bh;
    {
      a bj;
      e = bj.c("");
    }
    return &bi;
  }
} b;