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* [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
@ 2012-12-20  5:48 d.g.gorbachev at gmail dot com
  2012-12-20  5:51 ` [Bug middle-end/55750] " pinskia at gcc dot gnu.org
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: d.g.gorbachev at gmail dot com @ 2012-12-20  5:48 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

             Bug #: 55750
           Summary: [4.8 Regression] :-( in expand_expr_addr_expr_1, at
                    expr.c:7646
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: d.g.gorbachev@gmail.com


$ cat bug.c
struct S {
  unsigned m : 1;
  unsigned n : 7;
} arr[2];

void foo(unsigned i)
{
  arr[i].n++;
}
$ gcc -S bug.c
bug.c: In function 'foo':
bug.c:8:11: internal compiler error: in expand_expr_addr_expr_1, at expr.c:7646
   arr[i].n++;
           ^
0x8387af9 expand_expr_addr_expr_1
    ../../gcc-4.8/gcc/expr.c:7646
0x8387e16 expand_expr_addr_expr
    ../../gcc-4.8/gcc/expr.c:7688
0x8393de1 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**)
    ../../gcc-4.8/gcc/expr.c:10369
0x83883dc expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**)
    ../../gcc-4.8/gcc/expr.c:7848
0x837dc00 store_expr(tree_node*, rtx_def*, int, bool)
    ../../gcc-4.8/gcc/expr.c:5224
0x837cac8 expand_assignment(tree_node*, tree_node*, bool)
    ../../gcc-4.8/gcc/expr.c:5010
0x828c3eb expand_gimple_stmt_1
    ../../gcc-4.8/gcc/cfgexpand.c:2209
0x828c7ee expand_gimple_stmt
    ../../gcc-4.8/gcc/cfgexpand.c:2305
0x829337d expand_gimple_basic_block
    ../../gcc-4.8/gcc/cfgexpand.c:4084
0x8294c86 gimple_expand_cfg
    ../../gcc-4.8/gcc/cfgexpand.c:4603


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
@ 2012-12-20  5:51 ` pinskia at gcc dot gnu.org
  2012-12-20  5:55 ` d.g.gorbachev at gmail dot com
                   ` (6 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-12-20  5:51 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-12-20 05:51:02 UTC ---
What target is this for?


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
  2012-12-20  5:51 ` [Bug middle-end/55750] " pinskia at gcc dot gnu.org
@ 2012-12-20  5:55 ` d.g.gorbachev at gmail dot com
  2012-12-20  8:08 ` mpolacek at gcc dot gnu.org
                   ` (5 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: d.g.gorbachev at gmail dot com @ 2012-12-20  5:55 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

--- Comment #2 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> 2012-12-20 05:55:22 UTC ---
Tried i686-pc-linux-gnu, i686-w64-mingw32.


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
  2012-12-20  5:51 ` [Bug middle-end/55750] " pinskia at gcc dot gnu.org
  2012-12-20  5:55 ` d.g.gorbachev at gmail dot com
@ 2012-12-20  8:08 ` mpolacek at gcc dot gnu.org
  2012-12-20  8:49 ` jakub at gcc dot gnu.org
                   ` (4 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2012-12-20  8:08 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-12-20
                 CC|                            |mpolacek at gcc dot gnu.org
   Target Milestone|---                         |4.8.0
     Ever Confirmed|0                           |1

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> 2012-12-20 08:08:12 UTC ---
Reproduced even on x86_64-unknown-linux-gnu, confirmed.


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
                   ` (2 preceding siblings ...)
  2012-12-20  8:08 ` mpolacek at gcc dot gnu.org
@ 2012-12-20  8:49 ` jakub at gcc dot gnu.org
  2012-12-20  8:51 ` jakub at gcc dot gnu.org
                   ` (3 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-12-20  8:49 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-20 08:49:08 UTC ---
Started with
http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193882


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
                   ` (3 preceding siblings ...)
  2012-12-20  8:49 ` jakub at gcc dot gnu.org
@ 2012-12-20  8:51 ` jakub at gcc dot gnu.org
  2012-12-20 13:29 ` jakub at gcc dot gnu.org
                   ` (2 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-12-20  8:51 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-20 08:51:38 UTC ---
Invalid already at gimple dump:
foo (unsigned int i)
{
  <unnamed-unsigned:7> * D.1723;
  <unnamed-unsigned:7> D.1724;
  <unnamed-unsigned:7> D.1725;
  <unnamed-unsigned:7> D.1726;

  D.1723 = &arr[i].n;
  D.1724 = arr[i].n;
  D.1725 = D.1724;
  D.1726 = D.1725 + 1;
  *D.1723 = D.1726;
}
Obviously, taking address of a bitfield is wrong.


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
                   ` (4 preceding siblings ...)
  2012-12-20  8:51 ` jakub at gcc dot gnu.org
@ 2012-12-20 13:29 ` jakub at gcc dot gnu.org
  2012-12-20 18:14 ` jakub at gcc dot gnu.org
  2012-12-21  7:57 ` jakub at gcc dot gnu.org
  7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-12-20 13:29 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-20 13:28:57 UTC ---
Created attachment 29012
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29012
gcc48-pr55750.patch

Untested fix.


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
                   ` (5 preceding siblings ...)
  2012-12-20 13:29 ` jakub at gcc dot gnu.org
@ 2012-12-20 18:14 ` jakub at gcc dot gnu.org
  2012-12-21  7:57 ` jakub at gcc dot gnu.org
  7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-12-20 18:14 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-20 18:14:01 UTC ---
Author: jakub
Date: Thu Dec 20 18:13:56 2012
New Revision: 194647

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194647
Log:
    PR middle-end/55750
    * gimplify.c (gimplify_self_mod_expr): Don't force lvalue to
    pass is_gimple_min_lval.

    * gcc.c-torture/execute/pr55750.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr55750.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 9+ messages in thread
* [Bug middle-end/55750] [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646
  2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
                   ` (6 preceding siblings ...)
  2012-12-20 18:14 ` jakub at gcc dot gnu.org
@ 2012-12-21  7:57 ` jakub at gcc dot gnu.org
  7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-12-21  7:57 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

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

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

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-21 07:57:14 UTC ---
Fixed.


^ permalink raw reply	[flat|nested] 9+ messages in thread
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2012-12-20  5:48 [Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646 d.g.gorbachev at gmail dot com
2012-12-20  5:51 ` [Bug middle-end/55750] " pinskia at gcc dot gnu.org
2012-12-20  5:55 ` d.g.gorbachev at gmail dot com
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