[Bug tree-optimization/37658] New: gcc-4.3 regression: long compile times on source with lots of labels/gotos

[edwintorok at gmail dot com]

Using gcc-4.3 to compile Gauche-0.8.13/src/vm.c with -O2 takes several minutes,
this problem doesn't occur with gcc-4.2.

$ time /usr/bin/gcc-4.3 -O2 vm.i -c
real    2m13.341s
user    2m13.008s
sys     0m0.308s

$ time /usr/bin/gcc-4.3 -O2 testcase.i -c
real    2m2.527s
user    2m2.004s
sys     0m0.336s

$ time /usr/bin/gcc-4.2 -O2 vm.i -c
real    0m2.265s
user    0m2.216s
sys     0m0.040s

$ gcc-4.3 -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.3.2-1'
--with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3
--program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-cld --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.3.2 (Debian 4.3.2-1)

$ gcc-4.2 -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.2
--program-suffix=-4.2 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.2.4 (Debian 4.2.4-3)

[not sure about the component, it could be the register allocator, because I
encountered a spiller error while reducing the testcase]


-- 
           Summary: gcc-4.3 regression: long compile times on source with
                    lots of labels/gotos
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: edwintorok at gmail dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37658