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* [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn
@ 2011-03-04 18:19 jakub at gcc dot gnu.org
  2011-03-04 18:36 ` [Bug debug/47991] " jakub at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-04 18:19 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47991

           Summary: [4.6 Regression] Var-tracking ICE on s390x
                    *setmem_long insn
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: jakub@gcc.gnu.org
        ReportedBy: jakub@gcc.gnu.org
            Target: s390x-linux


/* { dg-do compile } */
/* { dg-options "-g -Os" } */

typedef __SIZE_TYPE__ size_t;
extern inline __attribute__ ((__always_inline__))
void *
memset (void *x, int y, size_t z)
{
  return __builtin___memset_chk (x, y, z, __builtin_object_size (x, 0));
}

void
foo (unsigned char *x, unsigned char *y, unsigned char *z,
     unsigned char *w, unsigned int v, int u, int t)
{
  int i;
  for (i = 0; i < t; i++)
    {
      memset (z, x[0], v);
      memset (w, y[0], v);
      x += u;
    }
  __builtin_memcpy (z, x, u);
}

ICEs on s390x-linux in var-tracking, because
(insn 56 71 57 5 (parallel [
            (clobber (reg:TI 6 %r6))
            (set (mem:BLK (subreg:DI (reg:TI 6 %r6) 0) [0 A8])
                (reg:DI 10 %r10 [95]))
            (use (reg:TI 6 %r6))
            (use (reg:TI 2 %r2))
            (clobber (reg:CC 33 %cc))
        ]) pr47372.i:9 115 {*setmem_long}
     (expr_list:REG_DEAD (reg:DI 10 %r10 [95])
        (expr_list:REG_DEAD (reg:DI 7 %r7)
            (expr_list:REG_UNUSED (reg:CC 33 %cc)
                (expr_list:REG_UNUSED (reg:TI 6 %r6)
                    (nil))))))
is really weird.  But we already allow (set (mem:BLK ...) (const_int ...))
for memset, and while this one is much worse than that, let's workaround it in
var-tracking too.
Not sure if this is a problem in 4.5 too, certainly not in 4.4 which didn't
have VTA.


^ permalink raw reply	[flat|nested] 6+ messages in thread
* [Bug debug/47991] [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn
  2011-03-04 18:19 [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn jakub at gcc dot gnu.org
@ 2011-03-04 18:36 ` jakub at gcc dot gnu.org
  2011-03-04 18:37 ` jakub at gcc dot gnu.org
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-04 18:36 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47991

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.03.04 18:36:14
   Target Milestone|---                         |4.6.0
     Ever Confirmed|0                           |1


^ permalink raw reply	[flat|nested] 6+ messages in thread
* [Bug debug/47991] [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn
  2011-03-04 18:19 [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn jakub at gcc dot gnu.org
  2011-03-04 18:36 ` [Bug debug/47991] " jakub at gcc dot gnu.org
@ 2011-03-04 18:37 ` jakub at gcc dot gnu.org
  2011-03-07 10:40 ` rguenth at gcc dot gnu.org
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-04 18:37 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47991

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-04 18:37:41 UTC ---
Created attachment 23545
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23545
gcc46-pr47991.patch

Untested fix.


^ permalink raw reply	[flat|nested] 6+ messages in thread
* [Bug debug/47991] [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn
  2011-03-04 18:19 [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn jakub at gcc dot gnu.org
  2011-03-04 18:36 ` [Bug debug/47991] " jakub at gcc dot gnu.org
  2011-03-04 18:37 ` jakub at gcc dot gnu.org
@ 2011-03-07 10:40 ` rguenth at gcc dot gnu.org
  2011-03-07 22:12 ` jakub at gcc dot gnu.org
  2011-03-07 22:17 ` jakub at gcc dot gnu.org
  4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-03-07 10:40 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47991

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


^ permalink raw reply	[flat|nested] 6+ messages in thread
* [Bug debug/47991] [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn
  2011-03-04 18:19 [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn jakub at gcc dot gnu.org
                   ` (2 preceding siblings ...)
  2011-03-07 10:40 ` rguenth at gcc dot gnu.org
@ 2011-03-07 22:12 ` jakub at gcc dot gnu.org
  2011-03-07 22:17 ` jakub at gcc dot gnu.org
  4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-07 22:12 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47991

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-07 22:11:59 UTC ---
Author: jakub
Date: Mon Mar  7 22:11:55 2011
New Revision: 170759

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170759
Log:
    PR debug/47991
    * var-tracking.c (find_use_val): Return NULL for
    cui->sets && cui->store_p BLKmode MEMs.

    * gcc.dg/pr47991.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr47991.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/var-tracking.c


^ permalink raw reply	[flat|nested] 6+ messages in thread
* [Bug debug/47991] [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn
  2011-03-04 18:19 [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn jakub at gcc dot gnu.org
                   ` (3 preceding siblings ...)
  2011-03-07 22:12 ` jakub at gcc dot gnu.org
@ 2011-03-07 22:17 ` jakub at gcc dot gnu.org
  4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-03-07 22:17 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47991

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-07 22:17:28 UTC ---
Fixed.


^ permalink raw reply	[flat|nested] 6+ messages in thread
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2011-03-04 18:19 [Bug debug/47991] New: [4.6 Regression] Var-tracking ICE on s390x *setmem_long insn jakub at gcc dot gnu.org
2011-03-04 18:36 ` [Bug debug/47991] " jakub at gcc dot gnu.org
2011-03-04 18:37 ` jakub at gcc dot gnu.org
2011-03-07 10:40 ` rguenth at gcc dot gnu.org
2011-03-07 22:12 ` jakub at gcc dot gnu.org
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