[Bug c++/57416] internal compiler error: in gimple_expand_cfg, at cfgexpand.c:4575

["daniel.kruegler at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57416

--- Comment #4 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
If you remove the still existing member initializer in func1, does the ICE
still exist? (On 4.9 after removal of that initializer I could compile and run
the program). Are all the compiler flags necessary to reproduce the ICE, or
will e.g. the combination of -Wall -std=c++11 suffice to produce the ICE?
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Subject: [Bug c++/57416] internal compiler error: in gimple_expand_cfg, at cfgexpand.c:4575
Date: Sat, 25 May 2013 18:27:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57416

--- Comment #5 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to Daniel Krügler from comment #4)
We had a clash here, but except for my first observation the remaining
questions are still relevant.
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/57417] New: hang on volatile int array
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW417

            Bug ID: 57417
           Summary: hang on volatile int array
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu

The following code causes gcc trunk (and the 4.7 & 4.8 branches) to hang at -O1
or above. This seems to be different from 57381, but perhaps related.

$ gcc-trunk -v
Target: x86_64-unknown-linux-gnu
gcc version 4.9.0 20130525 (experimental) [trunk revision 199323] (GCC)
$ gcc-trunk -m32 -O0 -c small.c
$ gcc-trunk -m32 -O1 -c small.c
^C
$ cat small.c
int a, b, c;

void foo ()
{
  volatile int d[1];
  b = 0;
  for (;; a--)
    c = (int)&d[b];
}