[Bug tree-optimization/68157] New: internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287

[Bug tree-optimization/68157] New: internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287

[a.niemoeller2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68157

            Bug ID: 68157
           Summary: internal compiler error: in
                    reassoc_stmt_dominates_stmt_p, at
                    tree-ssa-reassoc.c:1287
           Product: gcc
           Version: 5.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: a.niemoeller2 at gmail dot com
  Target Milestone: ---

command line:
$ cd /home/ansgar/scratch/svn/gcc5/src && /pds/opt/gcc-5.1-0/bin/g++    -O3
-DNDEBUG -fstrict-aliasing -fno-rtti -fno-exceptions -fomit-frame-pointer
-fno-unroll-loops -DCOMPILER_ATTRIBUTES -DUSE_RESTRICT -fno-tree-vectorize
-mtune=native -pipe -fdata-sections -ffunction-sections -Wl,--gc-sections
-funsafe-loop-optimizations -funsafe-math-optimizations -fcx-limited-range
-fno-signaling-nans -fno-math-errno -DDISABLE_FV_MG -march=native -mtune=native
-Wunused -Werror -Wall -Wextra -std=c++11 -pedantic -Wshadow -Wfloat-equal
-Wcast-align -Wfloat-equal -Wdisabled-optimization -Wformat=2 -Winvalid-pch
-Winit-self -Wmissing-include-dirs -Wredundant-decls -Wpacked -Wpointer-arith
-Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wwrite-strings
-Wlogical-op -Wno-array-bounds -Wno-maybe-uninitialized
-fdiagnostics-color=auto -I/home/ansgar/scratch/svn/gcc5/src -isystem
/pds/opt/fftw/include -isystem /pds/opt/parallel-netcdf/include -isystem
/pds/opt/openmpi/include    -o CMakeFiles/zfs.dir/zfslbmpartcont.cpp.o -c
/home/ansgar/scratch/svn/gcc5/src/zfslbmpartcont.cpp


compiler output:
/home/ansgar/scratch/svn/gcc5/src/zfslbmpartcont.cpp: In member function ‘void
ZFSLbmPartCont::detectPartColl()’:
/home/ansgar/scratch/svn/gcc5/src/zfslbmpartcont.cpp:2293:6: internal compiler
error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287
 void ZFSLbmPartCont::detectPartColl()
      ^
0xbe41f9 reassoc_stmt_dominates_stmt_p
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:1287
0xbe43f9 sort_by_operand_rank
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:598
0xbee6f5 vec<operand_entry*, va_heap, vl_embed>::qsort(int (*)(void const*,
void const*))
        ../../gcc-5.1.0/gcc/vec.h:960
0xbee6f5 vec<operand_entry*, va_heap, vl_ptr>::qsort(int (*)(void const*, void
const*))
        ../../gcc-5.1.0/gcc/vec.h:1688
0xbee6f5 reassociate_bb
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:4832
0xbee5a7 reassociate_bb
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:4916
0xbee5a7 reassociate_bb
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:4916
0xbee5a7 reassociate_bb
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:4916
0xbee5a7 reassociate_bb
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:4916
0xbee5a7 reassociate_bb
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:4916
0xbf0883 do_reassoc
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:5025
0xbf0883 execute_reassoc
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:5107
0xbf0883 execute
        ../../gcc-5.1.0/gcc/tree-ssa-reassoc.c:5140
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


gcc 5.1.0
./configure --prefix=...
GNU/Linux (openSUSE 12.3)

The error does not occur when -fno-math-errno is omitted.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg982

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Otherwise this might need bisection.

Note that I cannot do easily the bissection on darwin due to a lot of bootstrap
failures in the range r224161-r224647. If nobody volunteer to do the bisection,
I'll close this PR as FIXED on trunk (6.0).

[Bug tree-optimization/68157] internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287

[a.niemoeller2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68157

--- Comment #1 from a.niemoeller2 at gmail dot com ---
Created attachment 36620
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36620&action=edit
preprocessed file (*.i*)

uncompressed file was to large

[Bug tree-optimization/68157] [5/6 Regression] internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68157

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-10-30
                 CC|                            |trippels at gcc dot gnu.org
            Summary|internal compiler error: in |[5/6 Regression] internal
                   |reassoc_stmt_dominates_stmt |compiler error: in
                   |_p, at                      |reassoc_stmt_dominates_stmt
                   |tree-ssa-reassoc.c:1287     |_p, at
                   |                            |tree-ssa-reassoc.c:1287
     Ever confirmed|0                           |1

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@CFARM-IUT-TLSE3 ~ % cat zfslbmpartcont.ii
typedef double ZFSFloat;
double a, b, c, d;
class A {
public:
  long m_fn1();
};
class B {
  A m_collList;
  int m_particleCollisions;
  void m_fn2();
};
void B::m_fn2() {
  while (m_collList.m_fn1()) {
    ZFSFloat e, f;
    e = b * a * a;
    f = b * d;
    if (m_particleCollisions)
      c = e + f;
  }
}

trippels@CFARM-IUT-TLSE3 ~ % g++ -Ofast -c zfslbmpartcont.ii
zfslbmpartcont.ii: In member function ‘void B::m_fn2()’:
zfslbmpartcont.ii:12:6: internal compiler error: in
reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1218
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Subject: [Bug tree-optimization/68157] [5/6 Regression] internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idh157

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(gdb) l
1213
1214          if (gimple_code (s2) == GIMPLE_PHI)
1215            return false;
1216
1217          gcc_assert (gimple_uid (s1) && gimple_uid (s2));
1218
1219          if (gimple_uid (s1) < gimple_uid (s2))
1220            return true;
1221
1222          if (gimple_uid (s1) > gimple_uid (s2))
(gdb) p *s1
$1 = {
  code = GIMPLE_CALL,
  no_warning = 0,
  visited = 1,
  nontemporal_move = 0,
  plf = 0,
  modified = 0,
  has_volatile_ops = 0,
  pad = 0,
  subcode = 0,
  uid = 0,
  location = 2147483654,
  num_ops = 5,
  bb = 0x7ffff70ae2d8,
  next = 0x7ffff71fb1e0,
  prev = 0x7ffff71fb0f0
}
(gdb) p *s2
$2 = {
  code = GIMPLE_ASSIGN,
  no_warning = 0,
  visited = 0,
  nontemporal_move = 0,
  plf = 0,
  modified = 0,
  has_volatile_ops = 0,
  pad = 0,
  subcode = 35,
  uid = 5,
  location = 2147483655,
  num_ops = 2,
  bb = 0x7ffff70ae2d8,
  next = 0x7ffff71fb230,
  prev = 0x7ffff71f9c60
}
(gdb) p debug_gimple_stmt(s1)
reassocpow_17 = __builtin_powi (a.2_8, 2);
$3 = void
(gdb) p debug_gimple_stmt(s2)
# VUSE <.MEM_5>
d.3_12 = d;
$4 = void

[Bug tree-optimization/68157] [5/6 Regression] internal compiler error: in reassoc_stmt_dominates_stmt_p, at tree-ssa-reassoc.c:1287

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68157

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |5.3