[Bug target/82823] New: ICE in ix86_expand_prologue, at config/i386/i386.c:13171

["marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82823

            Bug ID: 82823
           Summary: ICE in ix86_expand_prologue, at
                    config/i386/i386.c:13171
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: law at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: i686-linux-gnu

Starting from r252998 we ICE on following valid code:

$ cat ice2.ii
class a
{
public:
  ~a ();
  int b;
};
class c
{
public:
  a m_fn1 ();
};
class d
{
  int e ();
  c f;
};
int
d::e ()
{
  return f.m_fn1 ().b;
}

$ g++ -c -O1 -fstack-clash-protection -march=i686 ice2.ii -m32 -c
during RTL pass: pro_and_epilogue
ice2.ii: In member function ‘int d::e()’:
ice2.ii:21:1: internal compiler error: in ix86_expand_prologue, at
config/i386/i386.c:13171
 }
 ^
0x16247c3 ix86_expand_prologue()
        ../../gcc/config/i386/i386.c:13171
0x1985ad2 gen_prologue()
        ../../gcc/config/i386/i386.md:13135
0x160281a target_gen_prologue
        ../../gcc/config/i386/i386.md:19431
0xe251b4 make_prologue_seq
        ../../gcc/function.c:5879
0xe25394 thread_prologue_and_epilogue_insns()
        ../../gcc/function.c:5996
0xe263a0 rest_of_handle_thread_prologue_and_epilogue
        ../../gcc/function.c:6487
0xe26422 execute
        ../../gcc/function.c:6529