[Bug rtl-optimization/15717] New: Error: can't resolve `L0' {*ABS* section} - `xx' {*UND* section}

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

The following testcase

struct x
{
  int a[100];
  int b[100];
};

extern struct x xx;

void xxx(void)
{
  unsigned long a = (unsigned long) &xx.b[0];

  printf ("%ld", -a);
}

Fails to compile with

/xgcc -B. -O1 -c yyy.c
/tmp/ccBFXfe3.s: Assembler messages:
/tmp/ccBFXfe3.s:13: Error: can't resolve `L0' {*ABS* section} - `xx' {*UND* section}

The problem is that cse produces the following rtl:

(const:SI (minus:SI (const_int -400 [0xfffffe70])
                (symbol_ref:SI ("xx") [flags 0x40] <var_decl 0x402ec000 xx>)))

Which translates to assembler like

movl    $-400-xx, 4(%esp)

Which as does not like.

-- 
           Summary: Error: can't resolve `L0' {*ABS* section} - `xx' {*UND*
                    section}
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rakdver at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15717