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* [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
@ 2013-10-21 23:05 su at cs dot ucdavis.edu
  2013-10-22 21:14 ` [Bug tree-optimization/58831] " mikpelinux at gmail dot com
                   ` (14 more replies)
  0 siblings, 15 replies; 16+ messages in thread
From: su at cs dot ucdavis.edu @ 2013-10-21 23:05 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

            Bug ID: 58831
           Summary: wrong code at -O2 and -O3 on x86_64-linux-gnu in
                    64-bit mode
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu

The current gcc trunk and 4.8.x miscompiles the following code on x86_64-linux
at -O2 and -O3 in 64-bit mode. 

This is a regression from 4.7.x. 

I had hoped to reduce it even further, but it's the best I have so far. 

$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-trunk/configure
--enable-languages=c,c++,objc,obj-c++,fortran,lto --disable-werror
--enable-checking=release --with-gmp=/usr/local/gcc-trunk
--with-mpfr=/usr/local/gcc-trunk --with-mpc=/usr/local/gcc-trunk
--with-cloog=/usr/local/gcc-trunk --prefix=/usr/local/gcc-trunk
Thread model: posix
gcc version 4.9.0 20131021 (experimental) [trunk revision 203907] (GCC) 
$ 
$ gcc-trunk -m64 -O1 small.c; a.out
$ gcc-trunk -m32 -O2 small.c; a.out
$ gcc-4.7.3 -m64 -O2 small.c; a.out
$ 
$ gcc-trunk -m64 -O2 small.c; a.out
a.out: small.c:14: fn1: Assertion `r' failed.
Aborted (core dumped)
$ gcc-trunk -m64 -O3 small.c; a.out
a.out: small.c:14: fn1: Assertion `r' failed.
Aborted (core dumped)
$ 
$ gcc-4.8.2 -m64 -O2 small.c; a.out
a.out: small.c:14: fn1: Assertion `r' failed.
Aborted (core dumped)
$ gcc-4.8.2 -m64 -O3 small.c; a.out
a.out: small.c:14: fn1: Assertion `r' failed.
Aborted (core dumped)
$ 


--------------------------------


#include<assert.h>

int a, *b, c, d, f, **i, p, q, *r;
short o, j;

static int
fn1 (int *p1, int **p2)
{
  int **e = &b;
  for (; p; p++)
    *p1 = 1;
  *e = *p2 = &d;

  assert(r); 

  return c;
}

static int **
fn2 ()
{
  for (f = 0; f != 42; f++)
    {
      int *g[3] = {0, 0, 0};
      for (o = 0; o; o--)
    for (; a > 1;)
      {
        int **h[1] = { &g[2] };
      }
    }
  return &r;
}



static short
fn3 ()
{
  for (; q < 1;)
    return 0;
  fn2 ();
  fn1 (0, 0);
  return 0;
}

int
main ()
{
  i = fn2 ();
  j = fn1 (b, i);
  fn3 ();
  return 0;
}


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug tree-optimization/58831] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
@ 2013-10-22 21:14 ` mikpelinux at gmail dot com
  2013-10-23  8:19 ` [Bug tree-optimization/58831] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
                   ` (13 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: mikpelinux at gmail dot com @ 2013-10-22 21:14 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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

--- Comment #1 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Started with r196174.


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug tree-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
  2013-10-22 21:14 ` [Bug tree-optimization/58831] " mikpelinux at gmail dot com
@ 2013-10-23  8:19 ` rguenth at gcc dot gnu.org
  2013-10-23 11:19 ` [Bug rtl-optimization/58831] " rguenth at gcc dot gnu.org
                   ` (12 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-23  8:19 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2013-10-23
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
   Target Milestone|---                         |4.8.3
            Summary|wrong code at -O2 and -O3   |[4.8/4.9 Regression] wrong
                   |on x86_64-linux-gnu in      |code at -O2 and -O3 on
                   |64-bit mode                 |x86_64-linux-gnu in 64-bit
                   |                            |mode
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
  2013-10-22 21:14 ` [Bug tree-optimization/58831] " mikpelinux at gmail dot com
  2013-10-23  8:19 ` [Bug tree-optimization/58831] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
@ 2013-10-23 11:19 ` rguenth at gcc dot gnu.org
  2013-10-23 11:39 ` rguenth at gcc dot gnu.org
                   ` (11 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-23 11:19 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |rtl-optimization

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's instruction scheduling which in fn1 changes

.L8:
        movq    $d, (%rsi)
        movq    $d, b(%rip)
        cmpq    $0, r(%rip)
        je      .L15  // assert-fail

to


.L8:
        cmpq    $0, r(%rip)
        movq    $d, (%rsi)
        movq    $d, b(%rip)
        je      .L15

but %rsi points to r.  Before sched2 we have

(note 22 21 23 4 [bb 4] NOTE_INSN_BASIC_BLOCK)
(insn 23 22 24 4 (set (mem/f:DI (reg/v/f:DI 4 si [orig:90 p2 ] [90]) [3
*p2_9(D)+0 S8 A64])
        (symbol_ref:DI ("d")  <var_decl 0x7f8900812720 d>)) t.c:12 85
{*movdi_internal}
     (expr_list:REG_DEAD (reg/v/f:DI 4 si [orig:90 p2 ] [90])
        (nil)))
(insn 24 23 25 4 (set (mem/f/c:DI (symbol_ref:DI ("b")  <var_decl
0x7f89008125f0 b>) [3 b+0 S8 A64])
        (symbol_ref:DI ("d")  <var_decl 0x7f8900812720 d>)) t.c:12 85
{*movdi_internal}
     (nil))
(insn 25 24 26 4 (set (reg:CCZ 17 flags)
        (compare:CCZ (mem/f/c:DI (symbol_ref:DI ("r")  <var_decl 0x7f8900812a18
r>) [3 r+0 S8 A64])
            (const_int 0 [0]))) t.c:14 4 {*cmpdi_ccno_1}
     (nil))
(jump_insn 26 25 35 4 (set (pc)

seems to be dependent on code-changes in random places :/

Somewhat shorter testcase:

#include<assert.h>

int a, *b, c, d, f, **i, p, q, *r;
short o, j;

static int __attribute__((noinline, noclone))
fn1 (int *p1, int **p2)
{
  int **e = &b;
  for (; p; p++)
    *p1 = 1;
  *e = *p2 = &d;

  assert (r);

  return c;
}

static int ** __attribute__((noinline, noclone))
fn2 ()
{
  for (f = 0; f != 42; f++)
    {
      int *g[3] = {0, 0, 0};
      for (o = 0; o; o--)
        for (; a > 1;)
          {
            int **h[1] = { &g[2] };
          }
    }
  return &r;
}

int
main ()
{
  i = fn2 ();
  fn1 (b, i);
  return 0;
}


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (2 preceding siblings ...)
  2013-10-23 11:19 ` [Bug rtl-optimization/58831] " rguenth at gcc dot gnu.org
@ 2013-10-23 11:39 ` rguenth at gcc dot gnu.org
  2013-10-23 11:42 ` rguenth at gcc dot gnu.org
                   ` (10 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-23 11:39 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, at some point during DSE true_dependence_1 still returns true for

(mem/f/c:DI (symbol_ref:DI ("r") <var_decl 0x7ffff6e3ba18 r>) [3 r+0 S8 A64])
(mem/f:DI (reg/v/f:DI 90 [ p2 ]) [3 *p2_9(D)+0 S8 A64])

but later when sched2 asks (maybe the wrong question?) base_alias_check
says that for

Breakpoint 8, true_dependence_1 (mem=0x7ffff6e6c360, mem_mode=VOIDmode, 
    mem_addr=0x0, x=0x7ffff6e6c420, x_addr=0x0, mem_canonicalized=false)
    at /space/rguenther/src/svn/trunk/gcc/alias.c:2520
2520      gcc_checking_assert (mem_canonicalized ? (mem_addr != NULL_RTX)
(mem/f:DI (reg/v/f:DI 4 si [orig:90 p2 ] [90]) [3 *p2_9(D)+0 S8 A64])
(mem/f/c:DI (symbol_ref:DI ("r") <var_decl 0x7ffff6e3ba18 r>) [3 r+0 S8 A64])

  rtx mem_base = find_base_term (mem_addr);
  if (! base_alias_check (x_addr, base, mem_addr, mem_base,
                          GET_MODE (x), mem_mode))
    return 0;

we pass

(gdb) call debug_rtx (mem_base)
(symbol_ref/f:DI ("*.LC0") [flags 0x2] <var_decl 0x7ffff6e6b098 *.LC0>)

!? to it.  find_base_term uses REG_BASE_VALUE which is initialized to the
above.


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (3 preceding siblings ...)
  2013-10-23 11:39 ` rguenth at gcc dot gnu.org
@ 2013-10-23 11:42 ` rguenth at gcc dot gnu.org
  2013-10-25  9:21 ` ebotcazou at gcc dot gnu.org
                   ` (9 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-23 11:42 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEW
                 CC|                            |ebotcazou at gcc dot gnu.org
           Assignee|rguenth at gcc dot gnu.org         |unassigned at gcc dot gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Deep RTL land - I'm out of here ;)


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (4 preceding siblings ...)
  2013-10-23 11:42 ` rguenth at gcc dot gnu.org
@ 2013-10-25  9:21 ` ebotcazou at gcc dot gnu.org
  2013-10-25  9:24 ` ebotcazou at gcc dot gnu.org
                   ` (8 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2013-10-25  9:21 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Oct 25 09:21:11 2013
New Revision: 204055

URL: http://gcc.gnu.org/viewcvs?rev=204055&root=gcc&view=rev
Log:
    PR rtl-optimization/58831
    * alias.c (init_alias_analysis): At the beginning of each iteration, set
    the reg_seen[N] bit if static_reg_base_value[N] is non-null.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr58831.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c
    trunk/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (5 preceding siblings ...)
  2013-10-25  9:21 ` ebotcazou at gcc dot gnu.org
@ 2013-10-25  9:24 ` ebotcazou at gcc dot gnu.org
  2013-10-25  9:31 ` ebotcazou at gcc dot gnu.org
                   ` (7 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2013-10-25  9:24 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Oct 25 09:24:02 2013
New Revision: 204056

URL: http://gcc.gnu.org/viewcvs?rev=204056&root=gcc&view=rev
Log:
    PR rtl-optimization/58831
    * alias.c (init_alias_analysis): At the beginning of each iteration, set
    the reg_seen[N] bit if static_reg_base_value[N] is non-null.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.c-torture/execute/pr58831.c
      - copied unchanged from r204055,
trunk/gcc/testsuite/gcc.c-torture/execute/pr58831.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/alias.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (6 preceding siblings ...)
  2013-10-25  9:24 ` ebotcazou at gcc dot gnu.org
@ 2013-10-25  9:31 ` ebotcazou at gcc dot gnu.org
  2013-10-25 10:09 ` rguenth at gcc dot gnu.org
                   ` (6 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2013-10-25  9:31 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

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

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks for reporting the problem.


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (7 preceding siblings ...)
  2013-10-25  9:31 ` ebotcazou at gcc dot gnu.org
@ 2013-10-25 10:09 ` rguenth at gcc dot gnu.org
  2013-10-25 10:10 ` rguenth at gcc dot gnu.org
                   ` (5 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-25 10:09 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 58865 has been marked as a duplicate of this bug. ***


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (8 preceding siblings ...)
  2013-10-25 10:09 ` rguenth at gcc dot gnu.org
@ 2013-10-25 10:10 ` rguenth at gcc dot gnu.org
  2013-10-25 10:12 ` [Bug rtl-optimization/58831] [4.7/4.8/4.9 " rguenth at gcc dot gnu.org
                   ` (4 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-25 10:10 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 58685 has been marked as a duplicate of this bug. ***


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.7/4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (9 preceding siblings ...)
  2013-10-25 10:10 ` rguenth at gcc dot gnu.org
@ 2013-10-25 10:12 ` rguenth at gcc dot gnu.org
  2013-10-25 10:14 ` rguenth at gcc dot gnu.org
                   ` (3 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-25 10:12 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
      Known to work|                            |4.8.3, 4.9.0
         Resolution|FIXED                       |---
   Target Milestone|4.8.3                       |4.7.4
            Summary|[4.8/4.9 Regression] wrong  |[4.7/4.8/4.9 Regression]
                   |code at -O2 and -O3 on      |wrong code at -O2 and -O3
                   |x86_64-linux-gnu in 64-bit  |on x86_64-linux-gnu in
                   |mode                        |64-bit mode
      Known to fail|                            |4.7.3, 4.8.2

--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #11)
> *** Bug 58685 has been marked as a duplicate of this bug. ***

This last duplicate has a testcase that fails on the 4.7 branch as well,
adjusting target milestone and re-opened.


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.7/4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (10 preceding siblings ...)
  2013-10-25 10:12 ` [Bug rtl-optimization/58831] [4.7/4.8/4.9 " rguenth at gcc dot gnu.org
@ 2013-10-25 10:14 ` rguenth at gcc dot gnu.org
  2013-10-25 11:17 ` ebotcazou at gcc dot gnu.org
                   ` (2 subsequent siblings)
  14 siblings, 0 replies; 16+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-10-25 10:14 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 58832 has been marked as a duplicate of this bug. ***


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.7/4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (11 preceding siblings ...)
  2013-10-25 10:14 ` rguenth at gcc dot gnu.org
@ 2013-10-25 11:17 ` ebotcazou at gcc dot gnu.org
  2013-10-25 11:18 ` ebotcazou at gcc dot gnu.org
  2013-10-28  7:10 ` su at cs dot ucdavis.edu
  14 siblings, 0 replies; 16+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2013-10-25 11:17 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #14 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Oct 25 11:16:59 2013
New Revision: 204058

URL: http://gcc.gnu.org/viewcvs?rev=204058&root=gcc&view=rev
Log:
    PR rtl-optimization/58831
    * alias.c (init_alias_analysis): At the beginning of each iteration, set
    the reg_seen[N] flag if static_reg_base_value[N] is non-null.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.c-torture/execute/pr58831.c
      - copied unchanged from r204056,
trunk/gcc/testsuite/gcc.c-torture/execute/pr58831.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/alias.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.7/4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (12 preceding siblings ...)
  2013-10-25 11:17 ` ebotcazou at gcc dot gnu.org
@ 2013-10-25 11:18 ` ebotcazou at gcc dot gnu.org
  2013-10-28  7:10 ` su at cs dot ucdavis.edu
  14 siblings, 0 replies; 16+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2013-10-25 11:18 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

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

--- Comment #15 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixed everywhere (and twice to be really sure :-)


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [Bug rtl-optimization/58831] [4.7/4.8/4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode
  2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
                   ` (13 preceding siblings ...)
  2013-10-25 11:18 ` ebotcazou at gcc dot gnu.org
@ 2013-10-28  7:10 ` su at cs dot ucdavis.edu
  14 siblings, 0 replies; 16+ messages in thread
From: su at cs dot ucdavis.edu @ 2013-10-28  7:10 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58831

--- Comment #16 from Zhendong Su <su at cs dot ucdavis.edu> ---
(In reply to Eric Botcazou from comment #15)
> Fixed everywhere (and twice to be really sure :-)

Verified (also against the original tests). Thanks.


^ permalink raw reply	[flat|nested] 16+ messages in thread
end of thread, other threads:[~2013-10-28  7:10 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-10-21 23:05 [Bug tree-optimization/58831] New: wrong code at -O2 and -O3 on x86_64-linux-gnu in 64-bit mode su at cs dot ucdavis.edu
2013-10-22 21:14 ` [Bug tree-optimization/58831] " mikpelinux at gmail dot com
2013-10-23  8:19 ` [Bug tree-optimization/58831] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org
2013-10-23 11:19 ` [Bug rtl-optimization/58831] " rguenth at gcc dot gnu.org
2013-10-23 11:39 ` rguenth at gcc dot gnu.org
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2013-10-25  9:21 ` ebotcazou at gcc dot gnu.org
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2013-10-25 10:09 ` rguenth at gcc dot gnu.org
2013-10-25 10:10 ` rguenth at gcc dot gnu.org
2013-10-25 10:12 ` [Bug rtl-optimization/58831] [4.7/4.8/4.9 " rguenth at gcc dot gnu.org
2013-10-25 10:14 ` rguenth at gcc dot gnu.org
2013-10-25 11:17 ` ebotcazou at gcc dot gnu.org
2013-10-25 11:18 ` ebotcazou at gcc dot gnu.org
2013-10-28  7:10 ` su at cs dot ucdavis.edu

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