[Bug 1584602] Re: internal compiler error: in fixup_reorder_chain, , at cfgrtl.c:3336

[Matthias Klose]

$ cat notify.i 
_Bool a;
fn1(unsigned int p1) {
  unsigned int b = a ? p1 : 0;
  if (p1 || b)
    fn2(0, p1, b);
}
$ gcc -c -O1 -fno-if-conversion notify.i 
$ gcc -c -O1 notify.i 
notify.i: In function 'fn1':
notify.i:6:1: internal compiler error: in fixup_reorder_chain, at cfgrtl.c:3336
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.

still seen in 4.8.5 (16.04), doesn't show in 4.9 (and gcc-snapshot in
trusty)

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https://bugs.launchpad.net/bugs/1584602

Title:
  internal compiler error: in fixup_reorder_chain,,  at cfgrtl.c:3336

Status in gcc-4.8 package in Ubuntu:
  New

Bug description:
  When building samba package on trusty/arm64 with gcc-4.8, the
  following build crash can be observed, and it can be triggered with
  gcc-4.7 too.

  
  01:07:10 runner /usr/bin/gcc -g -O2 -fstack-protector --param=ssp-buffer-size=4
  -Wformat -Werror=format-security -fPIC -D_REENTRANT
  -D_POSIX_PTHREAD_SEMANTICS --
  DSTATIC_LOCKING_MODULES=NULL -DSTATIC_LOCKING_MODULES_PROTO=extern
  void __LOCKINN
  G_dummy_module_proto(void) -MD -D_FORTIFY_SOURCE=2 -Idefault/source3
  -I../sourcee
  3 -Idefault/source3/include -I../source3/include -Idefault/source3/lib
  -I../sourr
  ce3/lib -Idefault/source4/heimdal/lib/com_err
  -I../source4/heimdal/lib/com_err --
  Idefault/source4/heimdal/lib/krb5 -I../source4/heimdal/lib/krb5
  -Idefault/sourcee
  4/heimdal/lib/gssapi -I../source4/heimdal/lib/gssapi
  -Idefault/source4/heimdal_bb
  uild -I../source4/heimdal_build
  -Idefault/bin/default/source4/heimdal/lib/asn1 --
  Idefault/source4/heimdal/lib/asn1 -Idefault/include/public
  -I../include/public --
  Idefault/source4 -I../source4 -Idefault/lib -I../lib
  -Idefault/source4/lib -I..//
  source4/lib -Idefault/source4/include -I../source4/include
  -Idefault/include -I..
  ./include -Idefault/lib/replace -I../lib/replace -Idefault -I..
  -Idefault/librpcc
   -I../librpc -Idefault/libcli/security -I../libcli/security
  -Idefault/source3/lii
  brpc -I../source3/librpc -Idefault/libcli/util -I../libcli/util
  -Idefault/lib/utt
  il/charset -I../lib/util/charset -Idefault/dynconfig -I../dynconfig
  -Idefault/lii
  b/compression -I../lib/compression -Idefault/libcli/nbt
  -I../libcli/nbt -Idefaull
  t/lib/crypto -I../lib/crypto -I/usr/local/include -D_SAMBA_BUILD_=4
  -DHAVE_CONFII
  G_H=1 -D_GNU_SOURCE=1 -D_XOPEN_SOURCE_EXTENDED=1 ../source3/locking/brlock.c -c
  -o default/source3/locking/brlock_92.o
  ../source3/smbd/notify.c: In function ‘change_notify_create’:
  ../source3/smbd/notify.c:297:1: internal compiler error: in
  fixup_reorder_chain,,
   at cfgrtl.c:3336
  ../source3/smbd/notify.c: In function ‘change_notify_create’:
  ../source3/smbd/notify.c:297:1: internal compiler error: in
  fixup_reorder_chain,,
   at cfgrtl.c:3336
   }
   ^
  Please submit a full bug report,
  with preprocessed source if appropriate.
  See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.

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