[Bug target/37438] New: [4.4 Regression] ICE in extract_insn, at recog.c:2027 for i{4,5}86

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

[maybe duplicate of or related to PR37434]

fails for i486, i586, works with i386, i686:

----- 8< -----
$ cat mknod.6.i 
int gnu_dev_minor (unsigned long long int dev)
{
  return (dev & 0xff) | ((unsigned int) (dev >> 12) & ~0xff);
}
int mknod(const char *path, unsigned int mode, unsigned long long int dev)
{
 unsigned short k_dev;
 k_dev = ((gnu_dev_major (dev) & 0xff) << 8) | (gnu_dev_minor (dev) & 0xff);
 return __syscall_mknod(path, mode, k_dev);
}
----- 8< -----

$ gcc-4.4-HEAD -Os -march=i486 -c mknod.6.i -o mknod.o -v
Using built-in specs.
Target: i686-linux-gnu
Configured with: ../../src/gcc-4.4/configure -v --enable-languages=c
CFLAGS='-O0 -g3 -ggdb3 -finline-limit=1' CXXFLAGS='-O0 -g3 -ggdb3
-finline-limit=1' 'BOOT_CFLAGS=-O0 -g3 -ggdb3 -finline-limit=1'
'BOOT_CXXFLAGS=-O0 -g3 -ggdb3 -finline-limit=1' 'CFLAGS_FOR_TARGET=-O0 -g3
-ggdb3 -finline-limit=1' 'CXXFLAGS_FOR_TARGET=-O0 -g3 -ggdb3 -finline-limit=1'
--prefix=/opt/gcc-4.4/ --enable-shared --with-system-zlib
--libexecdir=/opt/gcc-4.4/lib --enable-nls --without-included-gettext
--enable-threads=posix --program-suffix=-4.4-HEAD --enable-__cxa_atexit
--enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug
--enable-mpfr --disable-werror --enable-checking=yes --enable-debug
--disable-intermodule --enable-multilib i686-linux-gnu
Thread model: posix
gcc version 4.4.0 20080904 (experimental) [trunk revision 139986] (GCC) 
COLLECT_GCC_OPTIONS='-Os' '-march=i486' '-c' '-o' 'mknod.o' '-v'
 /opt/gcc-4.4/bin/../../gcc-4.4/lib/gcc/i686-linux-gnu/4.4.0/cc1 -fpreprocessed
mknod.6.i -quiet -dumpbase mknod.6.i -march=i486 -auxbase-strip mknod.o -Os
-version -o /tmp/cckAXH2c.s
GNU C (GCC) version 4.4.0 20080904 (experimental) [trunk revision 139986]
(i686-linux-gnu)
        compiled by GNU C version 4.4.0 20080904 (experimental) [trunk revision
139986], GMP version 4.2.2, MPFR version 2.3.1.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 88d8e62b153efecf9e83ecd8fac9180d
mknod.6.i: In function ?mknod?:
mknod.6.i:10: error: unrecognizable insn:
(insn 47 17 19 2 mknod.6.i:9 (set (reg:HI 3 bx [69])
        (zero_extend:HI (reg:QI 3 bx [orig:63 dev ] [63]))) -1 (nil))
mknod.6.i:10: internal compiler error: in extract_insn, at recog.c:2027


-- 
           Summary: [4.4 Regression] ICE in extract_insn, at recog.c:2027
                    for i{4,5}86
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aldot at gcc dot gnu dot org
GCC target triplet: i{4,5}86-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37438