Bug#528741: -floop-block causes numerous ICEs

[Sam Hocevar <sam@zoy.org>]

Package: gcc-4.4
Version: 4.4.0-4
Severity: normal

   gcc-4.4's new -flopp-block flag does not seem to work properly. Here
is a simple test case:

int buffer[256*256];
int main(void)
{
    int *dest = buffer;
    int x, y;
    for(x = 0; x < 256; x++)
        for(y = 0; y < 256; y++)
            *dest++ = 0;
    return 0;
}

% gcc-4.4 -O1 -floop-block foo.c -o foo
foo.c: In function ‘main’:
foo.c:2: internal compiler error: in expand_scalar_variables_expr, at graphite.c:4295
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.4/README.Bugs> for instructions.
%

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.29-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages gcc-4.4 depends on:
ii  binutils                      2.19.1-1   The GNU assembler, linker and bina
ii  cpp-4.4                       4.4.0-4    The GNU C preprocessor
ii  gcc-4.4-base                  4.4.0-4    The GNU Compiler Collection (base 
ii  libc6                         2.9-12     GNU C Library: Shared libraries
ii  libgcc1                       1:4.4.0-4  GCC support library
ii  libgomp1                      4.4.0-4    GCC OpenMP (GOMP) support library

Versions of packages gcc-4.4 recommends:
ii  libc6-dev                     2.9-12     GNU C Library: Development Librari

Versions of packages gcc-4.4 suggests:
pn  gcc-4.4-doc                   <none>     (no description available)
pn  gcc-4.4-locales               <none>     (no description available)
pn  gcc-4.4-multilib              <none>     (no description available)
pn  libgcc1-dbg                   <none>     (no description available)
pn  libgomp1-dbg                  <none>     (no description available)
pn  libmudflap0-4.4-dev           <none>     (no description available)
pn  libmudflap0-dbg               <none>     (no description available)

-- no debconf information