[Bug middle-end/55404] New: [4.8 Regression] Lots of failures at -O3

[Bug middle-end/55404] New: [4.8 Regression] Lots of failures at -O3

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55404

             Bug #: 55404
           Summary: [4.8 Regression] Lots of failures at -O3
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pinskia@gcc.gnu.org


gcc.c-torture/compile/20000629-1.c ICEs at -O3:
/home/apinski/src/gcc-cavium/toolchain-thunder/src/gcc/testsuite/gcc.c-torture/compile/20000629-1.c:
In function ‘foo’:
/home/apinski/src/gcc-cavium/toolchain-thunder/src/gcc/testsuite/gcc.c-torture/compile/20000629-1.c:7:1:
internal compiler error: Illegal instruction
 foo (struct a * b)
 ^
0x7fa1f5 crash_signal
    /data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/toplev.c:334
0xb5ef55 analyze_overlapping_iterations
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-data-ref.c:2958
0xb5fd11 subscript_dependence_tester_1
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-data-ref.c:3510
0xb5feea subscript_dependence_tester
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-data-ref.c:3561
0xb61406 compute_affine_dependence(data_dependence_relation*, loop*)
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-data-ref.c:4190
0xb61e0b compute_all_dependences(vec<data_reference*, va_heap, vl_ptr>,
vec<data_dependence_relation*, va_heap, vl_ptr>*, vec<loop*, va_heap, vl_ptr>,
bool)
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-data-ref.c:4268
0xb62458 compute_data_dependences_for_loop(loop*, bool, vec<loop*, va_heap,
vl_ptr>*, vec<data_reference*, va_heap, vl_ptr>*,
vec<data_dependence_relation*, va_heap, vl_ptr>*)
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-data-ref.c:4545
0xb85b0c vect_analyze_data_refs(_loop_vec_info*, _bb_vec_info*, int*)
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-vect-data-refs.c:2975
0x9997d0 vect_analyze_loop_2
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-vect-loop.c:1598
0x9997d0 vect_analyze_loop(loop*)
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-vect-loop.c:1774
0x9b0c3b vectorize_loops()
   
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/gcc/tree-vectorizer.c:114
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://www.cavium.com/support.html> for instructions.

[Bug middle-end/55404] [4.8 Regression] Lots of failures at -O3

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55404

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dnovillo at gcc dot gnu.org
   Target Milestone|---                         |4.8.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-11-19 23:59:27 UTC ---
   0x0000000000b5ef4e <+734>:    addl   $0x1,0x693103(%rip)        # 0x11f2058
<_ZL16dependence_stats+24>
=> 0x0000000000b5ef55 <+741>:    ud2  

So a __builtin_trap .

[Bug middle-end/55404] [4.8 Regression] Lots of failures at -O3

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55404

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-11-20 00:03:31 UTC ---
      *overlap_iterations_a = conflict_fn (1, affine_fn_cst
(integer_zero_node));


static conflict_function *
conflict_fn (unsigned n, ...)

static affine_fn
affine_fn_cst (tree cst)

tree-data-ref.h:typedef vec<tree> affine_fn;


So yes this is the same issue as PR 55398 in the end.

*** This bug has been marked as a duplicate of bug 55398 ***