[Bug target/19000] New: [4.0 regression] ICE with -O and -O -fPIC

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

With gcc 4.0 checked out from CVS at Tue Dec 14 20:32:34 UTC 2004, I got

[hjl@gnu-10 tmp]$ cat foo.c
static int i;
int bar;
static __thread void *foo [32 / sizeof (void *)]
  __attribute__ ((tls_model ("initial-exec")))
  = { &i, &bar };
void
test1 (void)
{
  unsigned int s;
  for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
    {
      foo [s] = &foo[s];
    }
}
[hjl@gnu-10 tmp]$ /usr/gcc-4.0/bin/gcc foo.c -O   -S
foo.c: In function \uffff\uffff\ufffftest1\uffff\uffff\uffff:
foo.c:14: error: unrecognizable insn:
(insn 53 21 46 0 (set (reg/f:SI 67 [ D.1152 ])
        (const:SI (plus:SI (symbol_ref:SI ("foo") [flags 0x1a] <var_decl
0xb7d5ea6c foo>)
                (const_int 32 [0x20])))) -1 (nil)
    (expr_list:REG_EQUAL (const:SI (plus:SI (symbol_ref:SI ("foo") [flags 0x1a]
<var_decl 0xb7d5ea6c foo>)
                (const_int 32 [0x20])))
        (nil)))
foo.c:14: internal compiler error: in extract_insn, at recog.c:2020
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-10 tmp]$ /usr/gcc-4.0/bin/gcc foo.c -O   -S  -fPIC
foo.c: In function \uffff\uffff\ufffftest1\uffff\uffff\uffff:
foo.c:14: error: unrecognizable insn:
(insn 56 55 48 0 (set (reg/f:SI 69 [ D.1152 ])
        (plus:SI (plus:SI (unspec:SI [
                        (const_int 0 [0x0])
                    ] 15)
                (reg:SI 78))
            (const_int 32 [0x20]))) -1 (insn_list:REG_DEP_TRUE 55 (nil))
    (expr_list:REG_DEAD (reg:SI 78)
        (expr_list:REG_EQUAL (const:SI (plus:SI (symbol_ref:SI ("foo") [flags
0x1a] <var_decl 0xb7d5ea6c foo>)
                    (const_int 32 [0x20])))
            (nil))))
foo.c:14: internal compiler error: in extract_insn, at recog.c:2020
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

-- 
           Summary: [4.0 regression] ICE with -O and -O -fPIC
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl at lucon dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19000