[Bug target/71281] New: ICE on gcc trunk on knl, wsm, ivb and bdw targets (tree-ssa-reassoc)

[anton.mitrokhin at phystech dot edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71281

            Bug ID: 71281
           Summary: ICE on gcc trunk on knl, wsm, ivb and bdw targets
                    (tree-ssa-reassoc)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anton.mitrokhin at phystech dot edu
  Target Milestone: ---

Run any of the:
> g++ -std=c++11 -Ofast -march=knl -o out -c crash.cpp
> g++ -std=c++11 -Ofast -march=broadwell -o out -c crash.cpp
> g++ -std=c++11 -Ofast -march=ivybridge -o out -c crash.cpp
> g++ -std=c++11 -Ofast -march=westmere -o out -c crash.cpp

Output:
crash.cpp: In function 'void fn1()':
crash.cpp:11:6: internal compiler error: in reassoc_stmt_dominates_stmt_p, at
tree-ssa-reassoc.c:1284
 void fn1() {
      ^~~
0xee2532 reassoc_stmt_dominates_stmt_p
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:1284
0xee324f sort_by_operand_rank
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:535
0xeee124 vec<operand_entry*, va_heap, vl_embed>::qsort(int (*)(void const*,
void const*))
        /export/users/gnutester/stability/svn/trunk/gcc/vec.h:951
0xeee124 vec<operand_entry*, va_heap, vl_ptr>::qsort(int (*)(void const*, void
const*))
        /export/users/gnutester/stability/svn/trunk/gcc/vec.h:1698
0xeee124 reassociate_bb
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5257
0xeedfc7 reassociate_bb
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5389
0xeedfc7 reassociate_bb
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5389
0xeedfc7 reassociate_bb
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5389
0xef0f1a do_reassoc
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5503
0xef0f1a execute_reassoc
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5590
0xef0f1a execute
        /export/users/gnutester/stability/svn/trunk/gcc/tree-ssa-reassoc.c:5629
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 -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --with-pkgversion=Revision=236669/svn-rev:236669/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160524 (experimental) (Revision=236669/svn-rev:236669/)


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Might be duplicate of PR71280, but output differs, so not sure