[Bug middle-end/67271] [5/6 Regression] ICE with -O1,2,3 on darwin14.5 x86_64

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67271

--- Comment #5 from Richard Biener  ---
Author: rguenth
Date: Wed Sep 16 14:26:04 2015
New Revision: 227825

URL: https://gcc.gnu.org/viewcvs?rev=227825=gcc=rev
Log:
2015-09-16  Richard Biener  

PR middle-end/67271
* fold-const.c (native_encode_expr): Bail out on bogus offsets.

* gcc.dg/pr67271.c: New testcase.

Added:
trunk/gcc/testsuite/gcc.dg/pr67271.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog

[Bug middle-end/67271] [5/6 Regression] ICE with -O1,2,3 on darwin14.5 x86_64

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67271

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 Status|NEW |ASSIGNED
   Assignee|unassigned at gcc dot gnu.org  |rguenth at gcc dot 
gnu.org

--- Comment #4 from Richard Biener rguenth at gcc dot gnu.org ---
Mine.

[Bug middle-end/67271] [5/6 Regression] ICE with -O1,2,3 on darwin14.5 x86_64

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67271

--- Comment #3 from Marek Polacek mpolacek at gcc dot gnu.org ---
Seems like native_encode_string should deal with nonsensical offset:
(gdb) p off
$4 = -1352770792

[Bug middle-end/67271] [5/6 Regression] ICE with -O1,2,3 on darwin14.5 x86_64

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67271

Marek Polacek mpolacek at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2015-08-19
 Ever confirmed|0   |1

[Bug middle-end/67271] [5/6 Regression] ICE with -O1,2,3 on darwin14.5 x86_64

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67271

Marek Polacek mpolacek at gcc dot gnu.org changed:

   What|Removed |Added

 CC||mpolacek at gcc dot gnu.org
  Component|c   |middle-end
   Target Milestone|--- |5.3
Summary|ICE with -O1,2,3 on |[5/6 Regression] ICE with
   |darwin14.5 x86_64   |-O1,2,3 on darwin14.5
   ||x86_64

--- Comment #1 from Marek Polacek mpolacek at gcc dot gnu.org ---
Confirmed, started with r213045.  Not Darwin-specific.

[Bug middle-end/67271] [5/6 Regression] ICE with -O1,2,3 on darwin14.5 x86_64

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67271

--- Comment #2 from Marek Polacek mpolacek at gcc dot gnu.org ---
long int labs (long int j);
int
main ()
{
  long *a = empty;
  int i = 1441516387;
  a[i] = labs (a[i]);
  return 0;
}

$ ./cc1 -quiet q.c -O
q.c: In function ‘main’:
q.c:5:13: warning: initialization from incompatible pointer type
[-Wincompatible-pointer-types]
   long *a = empty;
 ^
q.c:9:1: internal compiler error: Segmentation fault
 }
 ^
0xd5be56 crash_signal
/home/marek/src/gcc/gcc/toplev.c:352
0xa11ecf native_encode_string
/home/marek/src/gcc/gcc/fold-const.c:7095
0xa11fb8 native_encode_expr(tree_node const*, unsigned char*, int, int)
/home/marek/src/gcc/gcc/fold-const.c:7127
0xa83bac fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned
long, tree_node*)
/home/marek/src/gcc/gcc/gimple-fold.c:5441
0xa841ce fold_const_aggregate_ref_1(tree_node*, tree_node* (*)(tree_node*))
/home/marek/src/gcc/gcc/gimple-fold.c:5558
0xa81d11 gimple_fold_stmt_to_constant_1(gimple_statement_base*, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
/home/marek/src/gcc/gcc/gimple-fold.c:5000
0xe9a2af ccp_fold
/home/marek/src/gcc/gcc/tree-ssa-ccp.c:1218
0xe9cf26 evaluate_stmt
/home/marek/src/gcc/gcc/tree-ssa-ccp.c:1738
0xe9f241 visit_assignment
/home/marek/src/gcc/gcc/tree-ssa-ccp.c:2294
0xe9f487 ccp_visit_stmt
/home/marek/src/gcc/gcc/tree-ssa-ccp.c:2367
0xf47f24 simulate_stmt
/home/marek/src/gcc/gcc/tree-ssa-propagate.c:339
0xf485cf simulate_block
/home/marek/src/gcc/gcc/tree-ssa-propagate.c:517
0xf497c6 ssa_propagate(ssa_prop_result (*)(gimple_statement_base*, edge_def**,
tree_node**), ssa_prop_result (*)(gphi*))
/home/marek/src/gcc/gcc/tree-ssa-propagate.c:934
0xe9f58b do_ssa_ccp
/home/marek/src/gcc/gcc/tree-ssa-ccp.c:2410
0xe9f646 execute
/home/marek/src/gcc/gcc/tree-ssa-ccp.c:2443
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