[Bug target/49853] New: [x32] PIC doesn't work with external symbol

[Bug target/49853] New: [x32] PIC doesn't work with external symbol

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49853

           Summary: [x32] PIC doesn't work with external symbol
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


[hjl@gnu-6 gcc]$ cat /tmp/bar.c
typedef unsigned int Elf32_Addr;
extern void _start (void);
int
dl_main ( Elf32_Addr *user_entry)
{
  if (*user_entry == (Elf32_Addr) _start)
    return 0;
  else
    return 1;
}
[hjl@gnu-6 gcc]$ ./xgcc -B./ -S -O2 -fPIC /tmp/bar.c   -mx32 -std=gnu99  -dp
/tmp/bar.c: In function ‘dl_main’:
/tmp/bar.c:10:1: error: unrecognizable insn:
(insn 6 5 7 3 (set (reg:SI 67)
        (symbol_ref:SI ("_start") [flags 0x41] <function_decl 0x7faad972ff00
_start>)) /tmp/bar.c:6 -1
     (nil))
/tmp/bar.c:10:1: internal compiler error: in extract_insn, at recog.c:2115
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-6 gcc]$

[Bug target/49853] [x32] PIC doesn't work with external symbol

[uros at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49853

--- Comment #1 from uros at gcc dot gnu.org 2011-07-26 18:03:59 UTC ---
Author: uros
Date: Tue Jul 26 18:03:54 2011
New Revision: 176798

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176798
Log:
    PR target/47369
    PR target/49853
    * config/i386/i386.c (ix86_expand_move): Call convert_to_mode
    if legitimize_tls_address returned operand in wrong mode. Allow
    SImode and DImode symbolic operand for PIC.  Call convert_to_mode
    if legitimize_pic_address returned operand in wrong mode.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c

[Bug target/49853] [x32] PIC doesn't work with external symbol

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49853

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ubizjak at gmail dot com

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-07-26 19:29:01 UTC ---
Another testcase:

[hjl@gnu-6 ilp32-10]$ cat x.i 
typedef struct FILE FILE;
int _fwalk(int (*)(FILE *));
int __sflush(FILE *);
int
fflush(FILE *fp)
{
  return (_fwalk(__sflush));
}
[hjl@gnu-6 ilp32-10]$ make
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -S -o x.s -mx32 -O2 -g -fPIC
-dp  x.i
x.i: In function ‘fflush’:
x.i:8:1: internal compiler error: in simplify_subreg, at simplify-rtx.c:5417
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [x.s] Error 1
[hjl@gnu-6 ilp32-10]$

[Bug target/49853] [x32] PIC doesn't work with external symbol

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49853

--- Comment #3 from Uros Bizjak <ubizjak at gmail dot com> 2011-07-26 19:34:47 UTC ---
(In reply to comment #2)
> Another testcase:

This is PR47372.

[Bug target/49853] [x32] PIC doesn't work with external symbol

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49853

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2011-07-26 19:37:09 UTC ---
Fixed.