[Bug rtl-optimization/52051] New: [4.7 regression] invalid stack-cleanup occured with -O flag

["jojelino at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52051

             Bug #: 52051
           Summary: [4.7 regression] invalid stack-cleanup occured with -O
                    flag
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jojelino@gmail.com
              Host: i686-pc-cygwin
            Target: i686-pc-mingw32
             Build: i686-pc-cygwin


Created attachment 26511
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26511
generated dump

testcase is libjava/testsuite/libjava.lang/TestProxy.jar
$ /tmp/gcc/host-i686-pc-cygwin/gcc/gcj -B/tmp/gcc/i686-pc-mingw32/libjava/
-B/tmp/gcc/host-i686-pc-cygwin/gcc/ -L/tmp/gcc/i686-pc-mingw32/winsup/mingw
-L/tmp/gcc/i686-pc-mingw32/winsup/w32api/lib -isystem
/tmp/gcc/winsup/mingw/include -isystem /tmp/gcc/winsup/w32api/include
-B/usr/i686-pc-mingw32/bin/ -B/usr/i686-pc-mingw32/lib/ -isystem
/usr/i686-pc-mingw32/include -isystem /usr/i686-pc-mingw32/sys-include
--sysroot=/usr/i686-pc-mingw32/sys-root -g -fdump-tree-gimple -fdump-rtl-expand
--main=TestProxy /tmp/gcc/libjava/testsuite/libjava.lang/TestProxy.jar
-oTestProxy -save-temps -dP -fdump-tree-optimized -O3 -fdump-passes
-fdump-rtl-all -v
Reading specs from /tmp/gcc/host-i686-pc-cygwin/gcc/specs
Reading specs from /tmp/gcc/i686-pc-mingw32/libjava/libgcj.spec
rename spec startfile to startfileorig
rename spec lib to liborig
COLLECT_GCC=/tmp/gcc/host-i686-pc-cygwin/gcc/gcj
COLLECT_LTO_WRAPPER=/tmp/gcc/host-i686-pc-cygwin/gcc/lto-wrapper.exe
Target: i686-pc-mingw32
Configured with: ./configure -C --prefix=/usr --enable-win32-registry
--enable-java-awt=qt --enable-threads=win32 --with-win32-nlsapi=unicode
--enable-tls --disable-bootstrap --target=i686-pc-mingw32 --enable-shared
--enable-load-library --enable-interpreter --disable-sjlj-exceptions
--enable-gomp --with-ecj-jar=/tmp/gcc/org.eclipse.jdt.core_3.7.0.v_B35.jar
--with-antlr-jar=/tmp/gcc/antlr-3.3-complete.jar
--with-libiconv-prefix=/usr/i686-pc-mingw32 --with-x=no
--enable-cloog-backend=isl --with-sysroot=/usr/i686-pc-mingw32/sys-root
--with-build-sysroot=/usr/i686-pc-mingw32/sys-root LTLDFLAGS=-no-undefined
lt_cv_deplibs_check_method=pass_all target_alias=i686-pc-mingw32
--enable-languages=c,c++,java,lto --no-create --no-recursion
Thread model: win32
gcc version 4.7.0 20120128 (experimental) (GCC)

confirmed following
without -O flag : worked
-O,-O1 : segmentation fault(due to invalid stack cleanup. needed one more pop.)