[Bug middle-end/60597] New: [4.9 Regression] ICE in df_refs_verify, at df-scan.c:4323

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60597

            Bug ID: 60597
           Summary: [4.9 Regression] ICE in df_refs_verify, at
                    df-scan.c:4323
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-checking
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
            Target: i?86-*-*

Created attachment 32400
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32400&action=edit
testcase

Compiling kdepim3 on i586 reveals the following ICE:

g++ -DHAVE_CONFIG_H -I. -I.. -I../libkmime -I../libkdepim -I/opt/kde3/include
-I/usr/lib/qt3/include -I.   -DQT_THREAD_SUPPORT  -D_REENTRANT
-D_FILE_OFFSET_BITS=64 -D_LARGE_FILES=1  -Wno-long-long -Wundef -ansi
-D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wchar-subscripts -Wall -W
-Wpointer-arith -DNDEBUG -DNO_DEBUG -O2 -fomit-frame-pointer -fmessage-length=0
-grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2
-funwind-tables -fasynchronous-unwind-tables -Wno-coverage-mismatch -g
-Wl,--add-needed -Wformat-security -Wmissing-format-attribute
-Wno-non-virtual-dtor -fno-exceptions -fno-check-new -fno-common
-DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT
-DQT_NO_TRANSLATION  -MT boxcontaineritem.o -MD -MP -MF
.deps/boxcontaineritem.Tpo -c -o boxcontaineritem.o boxcontaineritem.cpp
boxcontaineritem.cpp: In static member function 'static QPixmap
BoxContainerItem::calcComplexPixmap(const QPixmap&, const QColor&, const
QFont*, int)':
boxcontaineritem.cpp:370:1: internal compiler error: in df_refs_verify, at
df-scan.c:4323
 }
 ^
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.opensuse.org/> for instructions.

which can be reproduced on x86_64 with

./cc1plus -fpreprocessed boxcontaineritem.ii -quiet -g -O2 -m32