[Bug tree-optimization/26375] New: Swing modulo scheduling results in ICE

[anton at samba dot org]

I tried using -fmodulo-sched and managed to get an ICE. The test case is based
on some gzip code.

$ ~/toolchain/install/bin/gcc -v
Using built-in specs.
Target: powerpc-linux
Configured with: /home/anton/toolchain/gcc/gcc/configure --build=powerpc-linux
--host=powerpc-linux --target=powerpc-linux --enable-targets=powerpc64-linux
--enable-languages=c,c++,fortran --prefix=/home/anton/toolchain/install
Thread model: posix
gcc version 4.2.0 20060219 (experimental)

$ cat foo.c
unsigned int foo(unsigned int code, int len)
{
        unsigned int res = 0;
        do {
                res |= code & 1;
        } while (--len > 0);
        return res;
}

$ ~/toolchain/install/bin/gcc -O3 -fmodulo-sched -c foo.c foo.c: In function
'foo':
foo.c:8: internal compiler error: in add_deps_for_def, at ddg.c:243
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

It only ICE's with -m32, -m64 compiles OK.


-- 
           Summary: Swing modulo scheduling results in ICE
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: anton at samba dot org
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26375