[Bug target/41551] New: ia64: ICE: in instantiate_virtual_regs_in_insn, at function.c:1630

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

ICE on ia64 at -O1 and higher, seen with gcc 4.3 and 4.4 but not 4.2.
% gcc -O -c t.c
t.c: In function 'main':
t.c:5:1: error: unrecognizable insn:
(insn 5 4 6 3 t.c:3 (set (reg:DF 344)
        (unsigned_float:DF (reg/f:DI 328 sfp))) -1 (nil))
t.c:5:1: internal compiler error: in instantiate_virtual_regs_in_insn, at
function.c:1630

Environment:
System: Linux merulo 2.6.30.4-dsa-mckinley #1 SMP Sat Aug 15 18:22:08 UTC 2009
ia64 GNU/Linux
host: ia64-unknown-linux-gnu
build: ia64-unknown-linux-gnu
target: ia64-unknown-linux-gnu
configured with: ../src/configure -v --with-pkgversion='Debian 20090821-1'
--with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,java,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --enable-shared --enable-multiarch
--enable-linker-build-id --with-system-zlib --disable-nls --enable-clocale=gnu
--enable-libstdcxx-debug --disable-libssp --enable-mpfr --enable-java-awt=gtk
--enable-gtk-cairo --disable-plugin
--with-java-home=/usr/lib/gcc-snapshot/java-1.5.0-gcj-4.5/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/gcc-snapshot/java-1.5.0-gcj-4.5
--with-arch-directory=ia64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --with-system-libunwind --disable-werror
--build=ia64-linux-gnu --host=ia64-linux-gnu --target=ia64-linux-gnu

How-To-Repeat:
% cat t.c
int main(void)
{
 int var, *p = &var;
 return (double)(unsigned long)(p);
}


------- Comment #1 from ntyni at debian dot org  2009-10-02 19:22 -------
Fix:
downgrade to -O0


-- 
           Summary: ia64: ICE: in instantiate_virtual_regs_in_insn, at
                    function.c:1630
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ntyni at debian dot org
 GCC build triplet: ia64-unknown-linux-gnu
  GCC host triplet: ia64-unknown-linux-gnu
GCC target triplet: ia64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41551