[Bug target/25115] New: Segmentation fault in pre_insert_copy_insn

[kkojima at gcc dot gnu dot org]

The mainline compiler for sh4-*-linux-gnu segfaults with -O2 on
the program:

struct state
{
  int retrans;
  int retry;
  int options;
  char pad[4];
};

extern __thread struct state *res
  __attribute__ ((tls_model ("initial-exec")));

void
foo (void)
{
  if (!res->retrans)
    res->retrans = 5;
  if (!res->retry)
    res->retry = 4;
  if (!res->options)
    res->options = 1;
}

in gcse.c:pre_insert_copy_insn.  It starts to fail after the patch
r107456:

2005-11-24  Paolo Bonzini  <[EMAIL PROTECTED]>

        * gcse.c (hash_scan_set): Look through REG_EQUAL or REG_EQUIV notes
        also when doing PRE, rather than only for global CPROP.


-- 
           Summary: Segmentation fault in pre_insert_copy_insn
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kkojima at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: sh4-*-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25115